JP5071504B2 - Vehicle heat source control device - Google Patents

Description

  The present invention relates to an apparatus for controlling heat supply from a heat source of a vehicle.

  In recent years, various techniques have been developed from the viewpoint of reducing the amount of fuel consumed by a vehicle. For example, as an in-vehicle main unit, a hybrid vehicle including an electric motor in addition to an engine, and an idle stop system that automatically stops the engine when the vehicle stops are being developed.

  Generally, in the heating of the passenger compartment, heat that is discarded from the engine into cooling water or the like is used. However, in the fuel-saving vehicles listed in the above example, the amount of heat discarded from the engine decreases due to idle stop and improvement of the efficiency of the engine itself, and the amount of heat necessary for heating cannot be secured only by the waste heat from the engine. There is a fear.

  Then, the structure provided with the heat pump type heating apparatus driven with an electric motor other than the heating apparatus using the waste heat from an engine is proposed (for example, refer patent document 1).

Japanese Patent No. 3704788

  By the way, in the thing of patent document 1, the heat source used for the heating of a vehicle interior exists, and the problem of which heat source is used how much arises from a viewpoint of the efficient use of energy.

  However, in the thing of patent document 1, the guideline which supplies heat from several heat sources is not established, but the room for improvement is still left.

  The present invention has been made in view of such circumstances, and in a heat source control device that controls heat supply from a plurality of heat sources mounted on a vehicle, the amount of fuel consumed to supply heat is reduced. Is the main purpose.

  The present invention employs the following means in order to solve the above problems.

  The invention according to claim 1 is a heat source control device that controls heat supply from a plurality of heat sources mounted on a vehicle to the heat exchange unit, and is supplied from the plurality of heat sources to the heat exchange unit. A required heat amount calculating means for calculating a required heat amount, a heat cost calculating means for calculating a relationship between a heat amount to be supplied for each heat source and a heat cost that is a fuel amount consumed to supply a unit heat amount; Based on the relationship between the heat amount supplied from each heat source and the heat cost, the total heat amount supplied from the plurality of heat sources matches the required heat amount, and the heat cost of the entire heat source supplying the heat is And a heat quantity distribution determining means for determining a distribution for supplying heat from each heat source so as to be minimized.

  In order to reduce the amount of fuel consumed by the heat source for supplying heat, the inventors of the present application devised to reduce the heat cost, which is the amount of fuel consumed for supplying unit heat. In order to reduce the amount of fuel consumed by the entire plurality of heat sources to supply heat, it has been concluded that the heat cost of the entire plurality of heat sources may be reduced.

  In this regard, according to the above configuration, the required heat amount required to be supplied from the plurality of heat sources to the heat exchange unit, that is, the amount of heat to be supplied from the plurality of heat sources to the heat exchange unit is calculated. On the other hand, the relationship between the amount of heat to be supplied and the heat cost is calculated for each heat source.

  Based on the relationship between the heat amount supplied from each heat source and the heat cost, the total heat amount supplied from the plurality of heat sources matches the required heat amount, and the heat cost of the entire heat source supplying the heat is minimized. Thus, the distribution for supplying heat from each heat source is determined. For this reason, while request | requirement calorie | heat amount can be supplied to a heat exchanging part from a some heat source, the fuel amount consumed by the whole some heat source can be minimized.

  According to the second aspect of the present invention, the amount of fuel consumed to supply heat in each heat source is used as a function of the amount of heat, and the amount of heat for calculating the amount of fuel that is the heat amount that is a differential value obtained by differentiating the function of the amount of heat with the amount of heat Incremental fuel amount calculating means, wherein the heat amount distribution determining means is configured such that the total amount of heat supplied from the plurality of heat sources matches the required heat amount, and the heat amount incremental fuel amount of each heat source matches each other. The distribution of supplying heat from each heat source is determined.

  According to the above configuration, the amount of fuel consumed in order to supply heat in each heat source is used as a function of the amount of heat, and the calorie increment fuel amount that is a differential value obtained by differentiating the function of the amount of heat with the amount of heat is calculated. This amount-of-heat increment fuel amount indicates how much the amount of fuel consumed increases when the amount of heat supplied from the heat source is increased by a small amount.

  When supplying the required amount of heat from multiple heat sources, determine the distribution of supply of heat from each heat source (distribution load distribution of each heat source) as follows, thereby minimizing the heat cost of the multiple heat sources as a whole Can do. As a result, the amount of fuel consumed by the entire plurality of heat sources can be minimized.

  For example, when heat is supplied to the heat exchanging unit by the heat source 1 and the heat source 2, it is assumed that the heat amount increment fuel amounts of the heat source 1 and the heat source 2 are 200 [g / kWh] and 210 [g / kWh], respectively. The amount of heat supplied from the heat source 1 is increased by 1 [kW], and the amount of heat supplied from the heat source 2 is decreased by 1 [kW]. As a result, the total amount of heat supplied by the heat source 1 and the heat source 2 does not change, but the total amount of fuel consumed by the heat source 1 and the heat source 2 decreases by 10 [g / h].

  That is, the above description means that if there is a difference in the amount of fuel with increased heat amount among a plurality of heat sources, the amount of fuel consumed can be reduced without changing the total amount of heat to be supplied. In other words, the state in which the heat amount increment fuel amount of each heat source coincides with each other is a state in which the amount of fuel consumed cannot be further reduced. Therefore, by determining the supply load distribution of each heat source so as to form the state, the amount of fuel consumed by the plurality of heat sources as a whole can be minimized.

  In this regard, according to the above configuration, the distribution of supplying heat from each heat source is such that the total amount of heat supplied from the plurality of heat sources matches the required heat amount, and the heat amount increment fuel amount of each heat source matches each other. It is determined. For this reason, while request | requirement calorie | heat amount can be supplied to a heat exchanging part from a some heat source, the fuel amount consumed by the whole some heat source can be minimized. Furthermore, when determining the optimal supply load distribution of each heat source, it is not necessary to calculate the combination in a brute force manner, so that an increase in calculation load can be suppressed.

  According to a third aspect of the present invention, there is provided a heat quantity relationship calculating means for calculating a heat quantity relationship that is a relation between a heat quantity and the heat quantity incremental fuel quantity in each heat source, and the heat quantity distribution determining means is configured to calculate the heat quantity incremental fuel quantity for each heat source. While changing the heat sources to match each other, calculate the heat quantity corresponding to the heat quantity incremental fuel quantity based on the heat quantity relationship in each heat source, and each heat source so that the total heat quantity of each heat source matches the required heat quantity The distribution for supplying the amount of heat is determined.

  According to the above configuration, the heat quantity relationship, which is the relationship between the heat quantity and the heat quantity incremental fuel quantity, is calculated in each heat source. For this reason, when changing the heat amount incremental fuel amount so as to match each other in each heat source, the heat amount corresponding to the heat amount incremental fuel amount can be calculated based on the heat amount relationship in each heat source.

  And since distribution which supplies heat quantity from each heat source is determined so that the sum total of the heat quantity of each heat source may correspond to demand heat quantity, it is consumed in the whole of a plurality of heat sources, further suppressing increase in calculation load. The amount of fuel can be minimized.

  According to a fourth aspect of the present invention, the heat quantity relationship calculating means sets an upper limit value of heat quantity that can be supplied by each heat source, and the heat quantity distribution determining means increases the heat quantity increment fuel quantity so as to coincide with each other at each heat source. While calculating the amount of heat corresponding to the heat amount increment fuel amount in each heat source based on the heat amount relationship, the heat amount supplied to the heat source whose heat amount has reached the upper limit value is set as the upper limit value, and is supplied from the other heat sources. The distribution for supplying the heat quantity from each heat source is determined so that the sum of the heat quantity to be performed and the upper limit value matches the required heat quantity.

  Generally, each heat source has an upper limit value of the amount of heat that can be supplied. For this reason, when changing the heat amount incremental fuel amount so as to match each other in each heat source, the heat amount corresponding to the heat amount incremental fuel amount may reach an upper limit value in some heat sources.

  In this case, in a plurality of heat sources in which the amount of heat to be supplied has not reached the upper limit value, when the heat amount increment fuel amount of each heat source matches each other, the amount of fuel consumed by these heat sources is the smallest. On the other hand, in the heat source in which the amount of heat supplied reaches the upper limit value, the amount of heat increment fuel amount does not necessarily match that of the other heat sources, but even in this case, the fuel consumed by the plurality of heat sources as a whole The amount is the least.

  For example, in the state in which the required heat quantity is supplied by the heat source 1 and the heat source 2, the heat quantity increment fuel quantity of the heat source 1 that has reached the upper limit is 200 [g / kWh], and the supplied heat quantity is the upper limit. It is assumed that the heat amount increment fuel amount of the heat source 2 that has not reached the value is 210 [g / kWh]. In this case, as described above, if the amount of heat supplied from the heat source 1 is increased by 1 [kW] and the amount of heat supplied from the heat source 2 is decreased by 1 [kW], the required heat amount is supplied by the heat source 1 and the heat source 2. The total amount of fuel consumed by the heat source 1 and the heat source 2 can be reduced by 10 [g / h]. However, since the amount of heat supplied by the heat source 1 has reached the upper limit value, the amount of heat supplied cannot be increased further. Therefore, the amount of fuel consumed by the heat source 1 and the heat source 2 cannot be further reduced, and the amount of fuel consumed in that state is the smallest.

  In this regard, according to the above configuration, the upper limit value of the amount of heat that can be supplied in each heat source is set, and the heat amount incremental fuel amount is increased by being matched with each other in each heat source, while the heat amount incremental fuel is based on the heat amount relationship in each heat source. The amount of heat corresponding to the amount is calculated. Then, in the heat source whose heat amount has reached the upper limit value, the heat amount to be supplied is set to the upper limit value, and the distribution for supplying the heat amount from each heat source is determined so that the fuel amount consumed in the other heat sources is minimized. .

  That is, in the heat source in which the amount of heat to be supplied has not reached the upper limit value, the heat amount increment fuel amount of each heat source is increased by being matched with each other. Then, the distribution of supplying the heat amount from each heat source is determined so that the sum of the heat amount supplied from these heat sources and the heat amount of the heat source whose supply heat amount has reached the upper limit value matches the required heat amount. Therefore, the amount of fuel consumed by the heat source whose amount of heat to be supplied has not reached the upper limit can be minimized, and the amount of fuel consumed by the plurality of heat sources as a whole can be minimized.

  The invention according to claim 5 is characterized in that the heat quantity relation calculating means calculates the heat quantity relation in each heat source in accordance with an operating state of an engine mounted on the vehicle.

  The incremental amount of fuel in each heat source changes according to the operating state of the engine. For example, in a heat source that supplies heat by changing the timing of the ignition timing or the variable valve mechanism, a heat source that uses the thermal energy of the engine exhaust, cooling water as a heat source, etc. It changes according to the driving state. For this reason, the relationship (caloric relationship) between the amount of heat and the amount of incremental fuel in each heat source also changes according to the operating state of the engine.

  In this regard, according to the above configuration, the heat quantity relationship in each heat source is calculated according to the operating state of the engine mounted on the vehicle. For this reason, according to the engine operating state at that time, it is possible to appropriately determine the distribution for supplying heat from each heat source.

  In a sixth aspect of the present invention, the plurality of heat sources include an engine heat source that supplies heat to the heat exchanging unit via cooling water of an engine mounted on the vehicle, and the engine includes the cooling water. An electric pump is mounted, and pump control means for controlling the amount of cooling water discharged by the electric pump based on the amount of heat supplied from the engine heat source is provided.

  Generally, in the heating of the passenger compartment, heat that is discarded from the engine into cooling water is used. Here, the amount of heat supplied from the cooling water to the heat exchange unit such as the heater core varies depending on the flow rate of the cooling water flowing through the heat exchange unit.

  In this regard, according to the above-described configuration, the plurality of heat sources include an engine heat source that supplies heat to the heat exchanging unit via engine cooling water mounted on the vehicle, and the engine is an electric pump that discharges cooling water. Is installed. And since the discharge amount of the cooling water by an electric pump is controlled based on the heat amount supplied from an engine heat source, the heat amount supplied to a heat exchange part can be controlled appropriately.

  In the invention according to claim 7, the plurality of heat sources include an electric heat source that converts electric power into heat and supplies the heat, and the heat cost calculating means supplies unit electric power to the electric heat source. The heat cost is calculated on the basis of an electric power cost that is an amount of fuel consumed.

  In an electric heat source that converts electric power into heat and supplies the heat, for example, a heat pump or the like, there is a problem of how to handle a heat cost that is an amount of fuel consumed to supply a unit heat amount.

  In this regard, according to the above configuration, the plurality of heat sources include an electric heat source that converts electric power into heat and supplies the heat, and the electric power that is the amount of fuel consumed to supply unit electric power for the electric heat source The heat cost is calculated based on the cost. For this reason, the electric power cost of an electric heat source can be converted into a heat cost, and distribution which supplies heat from each heat source can be determined based on this heat cost.

  In the invention according to claim 8, a plurality of power sources are mounted on the vehicle, and a required power for calculating a required power required to be supplied from the plurality of power sources to an electric load including the electric heat source. The calculation means, the power cost calculation means for calculating the relationship between the power supplied for each power source and the power cost, and supplied from the plurality of power sources based on the relationship between the power supplied from each power source and the power cost. Power distribution determining means for determining distribution for supplying power from each power supply so that the total power to be supplied matches the required power and the power cost of the entire power supply that supplies the power is minimized. The heat cost calculating means calculates the heat cost based on the minimum power cost for the electric heat source.

  The electric power supplied to the electric heat source is generated by consuming fuel. Therefore, the heat cost of the electric heat source can be reduced by reducing the amount of fuel consumed to supply electric power to the electric heat source. Here, the amount of fuel consumed by the whole of the plurality of power sources for supplying electric power can be reduced by the same idea as that of the invention described in claim 1 described above.

  That is, according to the above configuration, the vehicle is equipped with a plurality of power sources, and the required power required to be supplied from the plurality of power sources to the electric load including the electric heat source, that is, the electric heat source from the plurality of power sources. The electric power to be supplied to the electric load is calculated. On the other hand, for each power source, the relationship between the power to be supplied and the power cost is calculated.

  Based on the relationship between the power supplied from each power source and the power cost, the total power supplied from the plurality of power sources matches the required power, and the power cost of the entire power source supplying the power is minimized. As described above, distribution for supplying power from each power source is determined. Therefore, required power can be supplied from a plurality of power sources to an electric load including an electric heat source, and the amount of fuel consumed by the plurality of power sources as a whole can be minimized.

  Then, the heat cost is calculated for the electric heat source based on the minimum power cost. For this reason, the heat cost of the electric heat source can be calculated in a state in which distribution for supplying power from each power source (supply load distribution for each power source) is optimized. And since the distribution which supplies heat from each heat source is determined based on this heat cost, even if it is a case where a plurality of heat sources include an electric heat source, the amount of fuel consumed by the whole plurality of heat sources is minimized. be able to.

  According to the ninth aspect of the present invention, the power for calculating the power increment fuel amount, which is a differential value obtained by differentiating the power function with respect to the power, with the amount of fuel consumed to supply power at each power source as a function of power. Incremental fuel amount calculating means, wherein the power distribution determining means is such that the sum of the power supplied from the plurality of power sources matches the required power, and the power incremental fuel amount of each power source matches each other. A distribution for supplying power from each power source is determined.

  According to the above configuration, based on the same concept as that of the invention described in claim 2 described above, the amount of fuel consumed to supply power in each power source is a function of power, and the function of power is differentiated by power. The power increment fuel amount which is a value is calculated. This electric power increment fuel amount indicates how much the consumed fuel amount increases when the electric power supplied from the power source is increased by a minute amount.

  Then, the distribution of supplying power from each power source is determined so that the total power supplied from the plurality of power sources matches the required power and the power increment fuel amount of each power source matches each other. Therefore, required power can be supplied from a plurality of power sources to an electric load including an electric heat source, and the amount of fuel consumed by the plurality of power sources as a whole can be minimized. Furthermore, when determining the optimum supply load distribution for each power supply, it is not necessary to calculate the combination of all the powers, so that an increase in calculation load can be suppressed.

  According to a tenth aspect of the present invention, there is provided a power relationship calculating unit that calculates a power relationship that is a relationship between the power and the power incremental fuel amount in each power source, and the power distribution determining unit includes the power incremental fuel amount for each power source. While changing the power supply to match each other, the power corresponding to the power increment fuel amount is calculated based on the power relation in each power supply, and the power supply of each power supply matches the required power. The distribution of supplying power from the power source is determined.

  According to the said structure, the electric power relationship which is the relationship between electric power and electric power increment fuel amount is calculated in each power supply by the view similar to the invention of Claim 3 mentioned above. For this reason, when the power increment fuel amount is changed to match each other at each power source, the power corresponding to the power increment fuel amount can be calculated based on the power relationship at each power source.

  And since the distribution which supplies electric power from each power supply is determined so that the sum total of the electric power of each power supply may correspond with request | requirement electric power, it is consumed by the whole some power supply, further suppressing the increase in calculation load. The amount of fuel can be minimized.

  In the invention according to claim 11, the power relation calculating means sets an upper limit value of power that can be supplied by each power source, and the power distribution determining means increases the power increment fuel amount by making each power source coincide with each other. In each power source, the power corresponding to the power increment fuel amount is calculated based on the power relationship, and the power supplied to the power source that has reached the upper limit value is set to the upper limit value and supplied from the other power source. The distribution of supplying power from each power source is determined so that the sum of the power to be performed and the upper limit value matches the required power.

  Generally, each power supply has an upper limit value of power that can be supplied. For this reason, when the power increment fuel amount is changed to match each other in each power source, the power corresponding to the power increment fuel amount may reach the upper limit value in some power sources.

  In this case, in a plurality of power sources whose supplied power has not reached the upper limit value, when the power increment fuel amount of each power source matches each other, the amount of fuel consumed by those power sources is the smallest. On the other hand, in the power source in which the power to be supplied has reached the upper limit value, the power increment fuel amount does not necessarily match with the other power sources, but even in this case, the fuel consumed by the plurality of power sources as a whole The amount is the least.

  In this regard, according to the above configuration, the upper limit value of the power that can be supplied by each power source is set based on the same concept as the invention described in claim 4 described above, and the power increment fuel amount is matched with each other by each power source. The power corresponding to the power increment fuel amount is calculated based on the power relationship in each power source. Then, in the power source whose power has reached the upper limit value, the power to be supplied is set to the upper limit value, and distribution for supplying power from each power source is determined so that the amount of fuel consumed by other power sources is minimized. .

  In other words, in the power source in which the power to be supplied does not reach the upper limit value, the power increment fuel amount of each power source is increased by being matched with each other. Then, the distribution of supplying power from each power source is determined so that the sum of the power supplied from these power sources and the power of the power source that has reached the upper limit value matches the required power. Therefore, it is possible to minimize the amount of fuel consumed by the power source whose supplied power does not reach the upper limit value, and to minimize the amount of fuel consumed by the plurality of power sources as a whole.

  In a twelfth aspect of the present invention, the plurality of power sources include a battery, the power relation calculation unit sets the power increment fuel amount with respect to power in the battery as a constant value, and the power distribution determination unit includes the power increment. The power corresponding to the power increment fuel amount is calculated based on the power relationship in each power supply while the fuel amount is made to be the same value by making each fuel supply coincide with each other, and the power supplied from the battery and the other power supply are supplied. The power supplied from the battery is determined so that the sum of the power and the required power matches.

  In a battery, it can be considered that the amount of fuel consumed for charging is the amount of fuel consumed for supplying power. Therefore, in the battery, the power increment fuel amount does not change with respect to the supplied power. In other words, the battery can change the power supplied without changing the power increment fuel amount.

  In this regard, according to the above-described configuration, the plurality of power sources include the battery, and the power increment fuel amount with respect to the electric power in the battery is a constant value. Then, the power increment fuel amount is made to coincide with each other at each power source to be the above-mentioned constant value, and the power corresponding to the power increment fuel amount is calculated at each power source based on the power relationship. At this time, in general, in the power source excluding the battery, when the power increment fuel amount is a constant value, the power corresponding to the power increment fuel amount is fixed to a specific value.

  And the electric power supplied from a battery is determined so that the sum total of the electric power supplied from a battery and the electric power supplied from another power supply may correspond with request | requirement electric power. For this reason, when power is supplied from the battery and other power sources, the required power can be supplied and the amount of fuel consumed can be minimized.

  In a thirteenth aspect of the present invention, the vehicle is equipped with a plurality of power sources including a battery, and a load request for calculating a required load power required to be supplied to the electric load including the electric heat source. Power calculation means, charge request power calculation means for calculating charge request power required to be supplied to the battery from a power supply excluding the battery, power supplied to each power supply, and the power cost Based on the relationship between the power cost and the power cost calculating means for calculating the relationship between the power and the power cost supplied from each power source, the total power supplied from the plurality of power sources excluding the battery is the load required power and the power Power is supplied from each power source except the battery so that the total power requirement is the sum of the power requirements for charging, and the power cost of the entire power source that supplies the power is minimized. Comprising a power distribution determining means for determining the amount, and the heat cost calculation means, for the electric heat source, and calculates the heat costs based on the minimum power cost.

  When charging a battery, it is necessary to calculate the power to be supplied from a plurality of power sources including the power used for the charging. Note that when the battery is charged, that is, when the required charging power is not 0, no power is supplied from the battery. On the other hand, when the battery is discharged, the battery is not charged and the required charging power becomes zero.

  In this regard, according to the above configuration, the vehicle is equipped with a plurality of power supplies including the battery, and the required load power required to be supplied from the power supply excluding the battery to the electric load including the electric heat source is calculated. The Further, the required charging power required to be supplied to the battery from the power source excluding the battery is calculated. On the other hand, for each power source, the relationship between the power to be supplied and the power cost is calculated.

  Based on the relationship between the power supplied from each power source and the power cost, the total power supplied from a plurality of power sources excluding the battery matches the total required power, which is the sum of the load required power and the charge required power. In addition, the distribution of supplying power from each power source excluding the battery is determined so that the power cost of the entire power source supplying the power is minimized. For this reason, the total required power including the power used for charging the battery can be supplied, and the amount of fuel consumed by the entire plurality of power supplies excluding the battery can be minimized.

  Then, the heat cost is calculated for the electric heat source based on the minimum power cost. For this reason, the heat cost of the electric heat source can be calculated in a state in which the distribution for supplying power from each power source excluding the battery (supply load distribution for each power source) is optimized. And since the distribution which supplies heat from each heat source is determined based on this heat cost, even if it is a case where a plurality of heat sources include an electric heat source, the amount of fuel consumed by the whole plurality of heat sources is minimized. be able to.

  According to the invention of claim 14, in each power source excluding the battery, the amount of fuel consumed to supply power is a function of power, and the power increment fuel is a differential value obtained by differentiating the function of power with power. The power increment fuel amount calculating means for calculating the amount and the power distribution determining means are configured such that a total power supplied from a power source excluding the battery is a total required power that is a sum of the load required power and the charging required power. The distribution of supplying power from each power source except for the battery is determined so that the power increment fuel amounts of the power sources except for the battery match each other.

  According to the above configuration, the power increment fuel amount, which is a differential value obtained by differentiating the power function with the power, is calculated using the fuel amount consumed to supply power as a function of the power in each power source except the battery. .

  Then, the distribution for supplying power from each power source excluding the battery is determined so that the power increment fuel amount of each power source excluding the battery matches each other. For this reason, the amount of fuel consumed by the entire plurality of power supplies excluding the battery can be minimized. Furthermore, when determining the optimum supply load distribution for each power supply, it is not necessary to calculate the combination of all the powers, so that an increase in calculation load can be suppressed.

  In the invention according to claim 15, the power relationship calculating means for calculating the power relationship that is the relationship between the power and the power increment fuel amount in each power source is provided, and the power distribution determining means is provided for each power source except the battery. While changing the power increment fuel amount so as to match each other, the power corresponding to the power increment fuel amount is calculated based on the power relationship in each power source except the battery, and the total power of each power source is the total request The distribution of supplying power from each power source except the battery is determined so as to match the power.

  According to the above configuration, the power relationship that is the relationship between the power and the power increment fuel amount is calculated in each power source. For this reason, when the power increment fuel amount is changed to match each other in each power source except the battery, the power corresponding to the power increment fuel amount can be calculated based on the power relationship in each power source except the battery.

  Since the distribution of supplying power from each power source excluding the battery is determined so that the total power of the respective power sources matches the total required power, a plurality of units excluding the battery are further suppressed while further suppressing an increase in calculation load. The amount of fuel consumed by the entire power source can be minimized.

  According to a sixteenth aspect of the present invention, the power relationship calculating means sets an upper limit value of power that can be supplied from each power source, and the power distribution determining means sets the power increment fuel amount to each other at each power source except the battery. The power corresponding to the power increment fuel amount is calculated based on the power relation in each power source excluding the battery while being increased in accordance with the power, and the power supplied to the power source whose power reaches the upper limit value is calculated as the upper limit. The distribution of supplying power from each power source excluding the battery is determined so that the sum of the power supplied from other power sources and the upper limit value matches the total required power.

  According to the above configuration, the upper limit value of the power that can be supplied by each power source is set, and the power increment fuel amount is increased by being matched with each other power source except for the battery. Electric power corresponding to the electric power increment fuel amount is calculated. In the power supply whose power has reached the upper limit value, the power to be supplied is set to the upper limit value, and the distribution of supplying power from each power supply except the battery is minimized so that the amount of fuel consumed by other power supplies is minimized. It is determined.

  In other words, in the power source in which the power to be supplied does not reach the upper limit value, the power increment fuel amount of each power source is increased by being matched with each other. Then, the distribution of power supply from each power source except for the battery is determined so that the sum of the power supplied from those power sources and the power of the power source that has reached the upper limit value matches the total required power. Is done. Therefore, it is possible to minimize the amount of fuel consumed by the power source whose supplied power does not reach the upper limit value, and to minimize the amount of fuel consumed by all the plurality of power sources excluding the battery.

  In the invention according to claim 17, in order to increase the charge amount of the battery when supplying the load required power from the respective power sources except the battery by the distribution and charging the battery, the unit charge amount is increased. Charge power cost calculation means for calculating a charge power cost that is the amount of fuel consumed is provided, and the charge request power calculation means calculates the maximum power within a range where the charge power cost is smaller than a reference value. It is characterized by electric power.

  As described above, in the battery, it can be considered that the amount of fuel consumed for charging is the amount of fuel consumed for supplying power. For this reason, the amount of fuel consumed when supplying electric power from the battery can be reduced by charging the battery in a state where the amount of fuel consumed for charging the battery is small.

  Here, considering the power cost that is the amount of fuel consumed to supply unit power, the amount of fuel consumed can be reduced by reducing this power cost. When power is supplied from a plurality of power sources, the amount of fuel consumed by the plurality of power sources can be reduced by reducing the power cost of the plurality of power sources.

  In this regard, according to the above configuration, when supplying the required load power from each power source excluding the battery by the above distribution (optimal supply load distribution of each power source) and charging the battery, the charge amount of the battery is a unit. A charge power cost, which is the amount of fuel consumed to increase the charge amount, is calculated.

  And since the required power is calculated within the range where the charging power cost is smaller than the reference value, the distribution of the charging power cost for all of these power supplies from the standard is optimized after optimizing the supply load distribution of each power supply excluding the battery. The battery can be charged in a small state. Furthermore, since the maximum power is set as the required charging power within a range where the charging power cost is smaller than the reference value, the battery can be efficiently charged in a state where the amount of fuel consumed is less than the reference. . As a result, the amount of fuel consumed by the plurality of power sources can be reduced through charging and discharging of the battery.

  In the invention described in claim 18, when power is supplied from each power source excluding the battery by the distribution, the optimum amount of fuel consumed by each power source excluding the battery is divided by the total required power. A total power source that includes an optimal power cost calculation unit that calculates a power cost, wherein the power incremental fuel amount calculation unit totals the power sources excluding the battery based on the power and the optimal power cost. The power increment fuel amount is a differential value obtained by differentiating the function of power with respect to power, using the amount of fuel consumed to supply power as a function of power. And calculating a power relationship that is a relationship between the power and the power increment fuel amount in the battery, and setting the power increment fuel amount with respect to the power in the battery as a constant value. Electric power supplied from the battery by calculating the electric power corresponding to the electric power increment fuel amount based on the electric power relationship in the total power source while setting the electric power increment fuel amount to the constant value when the required charging electric power is 0 And the power supplied from the total power supply are determined such that the power supplied from the battery is determined such that the total required power matches the total required power.

  According to the above configuration, when power is supplied from each power source excluding the battery by the above distribution (optimal supply load distribution of each power source), the total amount of fuel consumed by each power source excluding the battery is calculated as the total required power. The optimal power cost divided by is calculated. Then, based on the electric power and the optimum electric power cost, the power function excluding the battery is regarded as one power source, and the amount of fuel consumed to supply the electric power is used as a function of the electric power. A power increment fuel amount which is a differential value obtained by differentiating the power with the power is calculated. That is, when the amount of fuel consumed by the entire plurality of power sources excluding the battery is minimized, the plurality of power sources excluding the battery are regarded as one total power source, and the power increment fuel amount is calculated for this total power source.

  Then, a power relationship that is a relationship between the power and the power increment fuel amount in the total power source is calculated, and the power increment fuel amount with respect to the power is set to a constant value in the battery. Here, in the total power source, when the power increment fuel amount is a constant value, the power corresponding to the power increment fuel amount is fixed to a specific value. On the other hand, in the battery, the supplied power can be changed in a state where the power increment fuel amount is a constant value.

  Further, when the required charging power is 0, power can be supplied from the battery. Then, the power supplied from the battery is determined so that the sum of the power supplied from the battery and the power supplied from the total power supply matches the total required power. Therefore, when power is supplied from the battery and other power sources, the total required power can be supplied and the amount of fuel consumed can be minimized.

  The invention according to claim 19 is characterized in that the power relationship calculating means calculates the power relationship in each power source in accordance with an operating state of an engine mounted on the vehicle.

  The power increment fuel amount in each power source varies depending on the operating state of the engine. For example, in a generator that uses an engine as a power source, a generator that uses kinetic energy or thermal energy that the exhaust of the engine has, a generator that uses thermal energy that the cooling water of the engine has, this power increment fuel amount is It changes according to the operating state of the engine. For this reason, the relationship (electric power relationship) between the electric power and the electric power increment fuel amount in each power source also changes according to the operating state of the engine.

  In this regard, according to the above configuration, the above-described power relationship in each power source is calculated according to the operating state of the engine mounted on the vehicle. For this reason, the distribution which supplies electric power from each power supply can be determined appropriately according to the engine operating state at that time.

The block diagram which shows the control outline | summary of the heat supply and electric power supply in this system. The schematic diagram which shows the whole structure of this system. The flowchart which shows the process sequence of heat supply control. The functional block diagram for calculating a request | requirement calorie | heat amount. The map which shows the relationship between an engine operating point and a fuel consumption rate. The figure which shows the relationship between an engine operating point and additional calorie | heat amount. The graph which shows the fuel increase amount by additional heat generation. The heat cost characteristic figure which shows the relationship between supplied heat amount and heat cost. The graph which shows the relationship between supplied heat amount and a calorie | heat amount incremental fuel amount. The graph which shows the relationship between supplied heat amount and a calorie | heat amount incremental fuel amount. The graph which shows the relationship between supplied heat amount and a calorie | heat amount incremental fuel amount. The graph which shows the relationship between total supply calorie | heat amount and optimal distribution calorie | heat amount. The flowchart which shows the process sequence of base calorie | heat amount distribution. The flowchart which shows the process sequence of electric power supply control. The graph which shows the relationship between cooling water temperature and fuel consumption. The figure which shows the relationship between waste heat power generation and fuel increase amount. The graph which shows the relationship between supply electric power and electric power increment fuel amount. The graph which shows the relationship between total supply electric power and optimal distribution electric power. The flowchart which shows the process sequence of charge request power calculation. The map which shows the relationship between battery remaining capacity, load electric power demand, and standard electric power cost. The graph which shows the relationship between charging power, charging power cost, and reference | standard power cost. The graph which shows the relationship between charging power, charging power cost, and reference | standard power cost. The flowchart which shows the process sequence of base electric power distribution.

  Hereinafter, an embodiment will be described with reference to the drawings.

  This embodiment is embodied as a system for controlling heat supply from a plurality of heat sources mounted on a vehicle to a heat exchanging unit and power supply from a plurality of power sources to a plurality of electric loads when heating the vehicle interior. .

  FIG. 1 shows an outline of control of heat supply and power supply in this system. As shown in the figure, in this system, in order to minimize the amount of fuel consumed to supply heat from a plurality of heating heat sources to each heat exchange unit, the distribution of heat from each heat source (supply of each heat source) Load distribution).

  As the plurality of heat sources, an amount of heat of engine cooling water and a heat pump are provided. Heat is supplied from the engine to the engine cooling water, and engine waste heat amount adjusting means (1), (2), (3) (engine heat source) are used. Accordingly, the plurality of heat sources include engine waste heat amount adjusting means (1), (2), (3).

  At this time, the waste heat amount adjusting means (1), (2) so that the amount of fuel consumed for generating heat using the waste heat amount adjusting means (1), (2), (3) is minimized. , (3) is used to determine the combination for supplying heat. Specifically, considering the heat cost, which is the amount of fuel consumed to supply the unit heat amount, the total heat cost of the waste heat amount adjusting means (1), (2), (3) is minimized. Heat management (heat generation control). In the heat management of the cooling water, the engine is controlled so that the command heat amount is supplied using the waste heat amount adjusting means (1), (2), (3).

  Furthermore, the amount of heat supplied from the cooling water to the air in the vehicle interior via the heater core (heat exchange unit), and the amount of heat supplied from the indoor heat exchanger (heat exchange unit) of the heat pump system (electric heat source) to the air in the vehicle interior Consider. Then, the distribution of supplying heat from the cooling water and the heat pump system is determined so that the amount of fuel consumed for supplying heat from the cooling water and the heat pump system to the air in the passenger compartment is minimized.

  Also in this case, heat management is performed so that the heat costs of the cooling water and the entire heat pump system are minimized (optimum distribution algorithm). Then, in the heat management of the air in the passenger compartment, the requested heat quantity requested to be supplied to the cooling water is transmitted to the heat management of the cooling water, and the command heat quantity is controlled from the heat pump system. In addition, it controls so that command heat quantity is supplied from a heater core.

  In addition, the vehicle has a plurality of power sources, and when driving the heat pump system, power is supplied from each power source so that the amount of heat consumed to supply power to the electric load including the heat pump system is minimized. The distribution to be performed (distribution of supply load of each power source) is determined.

  As the plurality of power sources, an engine generator, a battery, and a waste heat generator using waste heat from the engine are provided. Here, in consideration of the power cost that is the amount of fuel consumed to supply the unit power, power management is performed so that the heat cost of the entire power source is minimized (optimum distribution algorithm). Then, in the heat management of the air in the passenger compartment, the required power required to be supplied to the electric load including the heat pump system is transmitted to the power management, and control is performed so that the command power is supplied from each power source in the power management. .

  When calculating the heat cost of the heat pump system, the amount of fuel consumed to supply power to the heat pump system is taken into account when supplying power by optimal supply load distribution of each power source as described above. The amount of fuel consumed to supply this power is considered to be the amount of fuel consumed to supply heat from the heat pump system.

  As described above, when heating the vehicle interior, the heat supply and power supply in each part are controlled so that the amount of fuel consumed in the entire system is minimized.

  FIG. 2 shows the overall configuration of this system. As shown in the figure, the system includes an engine 10. The engine 10 is a spark ignition type multi-cylinder gasoline engine, and includes a throttle valve, an intake valve, an exhaust valve, a fuel injection valve, an ignition device, and an intake side valve drive mechanism that adjusts the opening and closing timings of the intake and exhaust valves, respectively. An exhaust valve driving mechanism and the like are provided.

  The driving force of the engine 10 is transmitted to the transmission 12 through the drive shaft 11 and further transmitted to the axle 14 and the wheels 15 through the differential 13. On the other hand, when the vehicle is decelerated, the rotational force of the wheels 15 is transmitted to the transmission 12 via the axle 14 and the differential 13 and further transmitted to the engine 10 via the drive shaft 11.

  A water jacket is formed inside the cylinder block and cylinder head of the engine 10, and cooling water is circulated and supplied to the water jacket, whereby the engine 10 is cooled. A cooling water circulation path 21 made of cooling water piping or the like is connected to the water jacket, and the circulation path 21 is provided with an electric pump 22 for circulating the cooling water. And the flow volume of the cooling water which circulates through the circulation path 21 is adjusted by changing the discharge amount of the electric pump 22.

  The circulation path 21 is provided so as to extend toward the heater core 23 (heat exchange unit) on the outlet side of the engine 10 and return to the engine 10 again via the heater core 23. Air conditioned air is sent from the blower fan 24 to the heater core 23, and the air conditioned air passes through the heater core 23 or its vicinity so that the air conditioned air is heated by the heat received from the heater core 23, and the warm air is Supplied indoors.

  In such a configuration, the amount of heat supplied from the coolant to the vehicle interior via the heater core 23 is controlled by controlling the discharge amount of the electric pump 22 and the driving state of the blower fan 24.

  Further, a waste heat generator 25 (power source) is provided in the middle of the circulation path 21. The waste heat generator 25 includes a waste heat regenerator, and the waste heat regenerator converts heat of the cooling water into power. The waste heat generator 25 generates power using the power converted by the waste heat regenerator and supplies the power to the power supply circuit 40. By controlling the driving state of the waste heat generator 25, the power generation amount is adjusted.

  In addition, this system includes a heat pump system 30 (electric heat source). The heat pump system 30 includes an electric compressor 31, a compressor inverter 32, an indoor heat exchanger 37 (heat exchange unit), an outdoor heat exchanger 34, a fan 35, an expansion valve 36, an accumulator 33, The refrigerant circulation path 39 which consists of refrigerant | coolant piping etc. which connect these, and the heat pump control apparatus 38 are provided.

  The electric compressor 31 compresses and heats the refrigerant, and the heated refrigerant is sent to the indoor heat exchanger 37. Then, the conditioned air is sent from the blower fan 24, and the conditioned air passes near the indoor heat exchanger 37, whereby the conditioned air is heated by the heat received from the indoor heat exchanger 37, and the warm air enters the vehicle interior. Supplied. At this time, the refrigerant is cooled by heat dissipation.

  The refrigerant flowing through the indoor heat exchanger 37 is depressurized by the expansion valve 36 and sent to the outdoor heat exchanger 34. Then, outside air is sent to the outdoor heat exchanger 34 by the fan 35, and the refrigerant is heated by heat received from the outside air. The heated refrigerant is sent to the electric compressor 31 via the accumulator 33.

  The electric compressor 31 is driven by the electric power supplied from the compressor inverter 32, and the inverter 32 is controlled by the heat pump control device 38. The amount of heat supplied from the heat pump system 30 to the vehicle interior via the indoor heat exchanger 37 is controlled by controlling the driving state of the electric compressor 31 through the heat pump control device 38 and the inverter 32.

  In addition to the waste heat generator 25, the system includes a generator 41 (engine generator) driven by the driving force of the engine 10 and a battery 43 that performs charging and discharging as power sources. The generator 41 is an alternator or a motor generator. Each of the above power supplies is connected to the power supply circuit 40 and supplies power to the power supply circuit 40. The battery 43 is charged with power supplied from the power supply circuit 40.

  By controlling the driving state of the generator 41, the power generation amount is adjusted. The generator 41 performs regenerative power generation based on the rotational force transmitted from the wheels 15 to the engine 10 via the transmission 12 or the like when the vehicle is decelerated.

  In addition, an electric load including the electric pump 22, the compressor inverter 32, a load 42, an auxiliary machine, and the like is connected to the power circuit 40. Then, electric power is supplied to these electric loads through the power supply circuit 40.

  The system includes an energy control device 51, an engine control device 52, a generator control device 53, and an air conditioning control device 54. These control devices 51 to 54 are mainly configured by a microcomputer including a CPU, a ROM, a RAM, and the like, and execute various controls by executing various control programs stored in the ROM.

  The energy control device 51 controls the electric pump 22, the blower fan 24, and the heat pump control device 38 through the air conditioning control device 54. Further, the energy control device 51 controls the driving state of the waste heat generator 25 and the generator 41 through the generator control device 53. Further, the energy control device 51 controls the operating state of the engine 10 through the engine control device 52.

  In this system, an A / C switch 61 for switching on / off of an air conditioner, a temperature setting switch 62 for a driver to set a target value (target temperature) of the passenger compartment temperature, and a vehicle for detecting the passenger compartment temperature. Indoor temperature sensor 63, outdoor air temperature sensor 64 for detecting the outside air temperature, air outlet temperature for detecting the temperature (air outlet temperature) of the conditioned air sent from the heater core 23 or the indoor heat exchanger 37 to the vehicle interior via the air conditioner air outlet. A sensor 65 and the like are provided. Signals from these sensors and the like are appropriately input to the air conditioning controller 54.

  The engine control device 52 performs various controls of the engine 10 according to the operating state of the engine 10. In this system, a rotation speed sensor 67 that detects the rotation speed of the engine 10, an engine load sensor 68 that detects a load on the engine 10 such as an intake air amount and intake pipe negative pressure, and a water temperature that detects the temperature of cooling water in the water jacket. A sensor 69, a vehicle speed sensor 66 for detecting the speed of the vehicle, and the like are provided. Detection signals from these sensors are appropriately input to the engine control device 52.

  The engine control device 52 receives detection signals from the various sensors described above, and controls the fuel injection control by the fuel injection valve based on the detection signals, the ignition timing control by the ignition device, and the valves by the intake side and exhaust side valve drive mechanisms. Implement intake control using timing control and throttle valve.

  In the various controls described above, the engine shaft efficiency (fuel consumption rate) basically differs depending on the operating state of the engine 10. In view of this point, various controls are performed based on the adaptation data and the like so that the engine shaft efficiency is maximized in the operation state at that time.

  Here, in the present system, when the amount of generated waste heat (generated heat amount) that is the heat energy of the engine 10 is increased, the amount of generated heat is increased so that the amount of increase in fuel accompanying the increase in waste heat is minimized. Control (heat generation control). Specifically, the heat generation control includes a plurality of waste heat amount adjusting means for the engine 10 for increasing the amount of generated heat. When a heat utilization request such as a heating request is generated, the combination of waste heat amount adjusting means is determined so that the heat cost of all the plurality of waste heat amount adjusting means is minimized.

The heat generation control will be described in more detail. In this system, for example,
・ Delaying the ignition timing increases the amount of waste heat. ・ Changing the intake valve opening timing to the advanced side (by making the intake valve open quickly) increases the waste heat amount. ・ Delaying the exhaust valve opening timing. The engine waste heat amount is increased by using one or a plurality of factors such as an increase in waste heat amount when changing to the corner side (when exhaust exhaust is slowly opened). Moreover, in this embodiment as a waste-heat amount adjustment means of the engine 10, for example,
(1) Means for slowly opening the exhaust valve (2) Means for quickly opening the intake valve (3) Means for performing ignition retard angle

  FIG. 3 shows a processing procedure of heat supply control by this system. This process is repeatedly executed with a predetermined period. In parallel with this process, the power supply control process is repeatedly executed with a predetermined period. The details of the processing in each step of these heat supply control and power supply control will be described later.

  The air-conditioning control device 54 calculates the required amount of heat required to be supplied from the plurality of heat sources to the heat exchange unit, that is, the amount of heat to be supplied from the plurality of heat sources to the heat exchange unit in response to the heating request of the driver. (S11). Then, the air conditioning control device 54 transmits this required heat quantity to the energy control device 51.

  Subsequently, the energy control device 51 calculates the heat cost of each heat source (S12). At this time, the heat cost of the heat pump system 30 is calculated from the amount of heat to be supplied and the amount of fuel consumed to supply the power to be used. At that time, power supply from a plurality of power sources is controlled so that the amount of fuel consumed to supply the power is minimized. This power supply control will be described later.

  Subsequently, the energy control device 51 calculates a base heat amount that is a heat amount that can be supplied in a state where the heat cost is zero in each heat source (a state where the amount of fuel consumed for supplying heat is zero) (S13). ). The energy control device 51 obtains the amount of fuel consumed to supply heat in each heat source as a function of the amount of heat based on the heat cost of each heat source. Then, based on this function, a heat quantity relationship is calculated, which is a relation between the heat quantity to be supplied and a heat quantity incremental fuel quantity that is a differential value obtained by differentiating this function with the heat quantity. Furthermore, based on this heat quantity relationship, an optimization calculation is performed so that the amount of fuel consumed by the entire heat source to supply heat is minimized (S14).

  Subsequently, based on the result of this optimization calculation, the base heat amount of each heat source is distributed to the required heat amount, and the remaining required heat amount that is the remaining required heat amount is distributed to each heat source as an additional required heat amount (S15). Thereafter, for each heat source, a command heat amount for each heat source is calculated as the sum of the allocated base heat amount and the allocated remaining required heat amount (S16).

  Then, the energy control device 51 transmits the command heat amount for each heat source to the air conditioning control device 54 and the engine control device, and the air conditioning control device 54 and the engine control device control each heat source so that the command heat amount is supplied. .

  FIG. 14 shows a processing procedure of power supply control by this system. This process is repeatedly executed at a predetermined cycle in parallel with the heat supply control process.

  The energy control device 51 calculates the power cost, which is the amount of fuel consumed to supply unit power at each power source (S41), and the power cost is zero at each power source (consumed to supply power). The base power, which is the power that can be supplied in a state where the amount of fuel to be zero) is calculated (S42). As in the case of the heat amount, the energy control device 51 uses the amount of fuel consumed to supply power at each power source as a function of power, the power to be supplied, and a differential value obtained by differentiating this function with power. A power relationship that is a relationship with a certain power incremental fuel amount is calculated. Then, based on this power relationship, optimization calculation is performed so that the amount of fuel consumed by the entire power supply to supply power is minimized (S43). Then, the heat cost of the heat pump system 30 (electric heat source) is calculated based on the power supply load distribution optimized in this way (S44). In S12 of the heat supply control described above, the heat cost calculated in this way for the heat pump system 30 is used.

  The energy control device 51 receives the power required for the heat pump system 30 to supply heat from the air conditioning control device 54, receives the power required by other electric loads, and removes the battery 43 based on them. The required load power to be supplied is calculated (S45). In addition, the energy control device 51 calculates the required charging power required to be supplied to the battery 43 from the power source excluding the battery 43 (S46). At this time, the required charging power is calculated so as to be the maximum power in a state where the power cost of the power charged in the battery 43 is less than the reference. Further, a total required power that is the sum of the load required power and the charge required power is calculated.

  Then, the energy control device 51 distributes the base power of each power source to the total required power based on the result of the optimization calculation, and uses the remaining required power that is the remaining of the total required power as the additional required power. (S47). For each power source, the command power for each power source is calculated as the sum of the allocated base power and the allocated additional required power (S48). When the required charging power is 0, the supply load distribution of each power source excluding the battery 43 is optimized, and the optimum power is obtained for the total power source and the battery 43, which consider these power sources as one power source. Determine supply load distribution.

  Thereafter, the energy control device 51 updates the power cost of the battery 43 based on the required charging power and the amount of fuel consumed at that time (S49).

  Next, details of the processing of each step in the above-described heat supply control will be described.

  FIG. 4 is a functional block diagram for calculating the required heat quantity Qreq in S11 of FIG. The air conditioning control device 54 includes an outlet temperature / air volume calculation unit M1 and a required heat amount calculation unit M2.

  In the outlet temperature / air volume calculation unit M1, the vehicle speed Vc detected by the vehicle speed sensor 66, the air conditioner set temperature Tset set by the temperature setting switch 62, and the vehicle interior temperature sensor 63 are detected by using a map or the like. The required value of the air-conditioner outlet temperature (required outlet temperature Treq) and the required value of the air-conditioner outlet air volume (required outlet air volume Vreq) using the outside temperature Tout detected by the outside air temperature sensor 64 as parameters. ) Is calculated.

  The required heat quantity calculation unit M2 calculates a required heat quantity Qreq by using, as parameters, the required outlet temperature Treq and the required outlet air volume Vreq calculated by the outlet temperature / air volume calculation unit M1 and the outside air temperature Tout by using a map or the like. .

  Next, details of the process of calculating the heat cost of each heat source in S12 of FIG. 3 will be described.

  FIG. 5 shows an example of a map representing the relationship between the operating state of the engine 10 and the fuel consumption rate. In the figure, the engine rotation speed and the engine torque are shown as the operating state of the engine 10.

  In this system, among the energy generated by the combustion of fuel in the engine 10, heat energy is recovered and reused by using the cooling water of the engine 10 as a medium, thereby improving the fuel efficiency of the entire system.

  The heat generation control of the engine 10 is, for example, when there is a heat use request during engine operation at the engine shaft efficiency best point, and the required heat amount Qreq increases with the heat use request, the generated heat amount at the engine shaft efficiency best point. Then, when the required heat quantity Qreq cannot be satisfied, the heat quantity shortage is performed.

  In this case, in order to satisfy the required heat quantity Qreq, for example, as shown in FIG. 6, the operating point of the engine 10 is changed from the engine shaft efficiency best point A to the point A ′ different from this by using the waste heat quantity adjusting means. Therefore, it is necessary to increase the amount of engine waste heat by the amount of heat ΔQ from the amount of heat generated at the engine shaft efficiency best point A (additional heat amount = 0). Due to the transition of the engine operating point of A → A ′, the operating point of the engine 10 is shifted to the fuel increase side (fuel efficiency deterioration side) from the engine shaft efficiency best point, and the generated heat amount (base) at the engine shaft efficiency best point A An increase in the amount of heat (additional heat amount ΔQ) is generated with respect to the amount of heat).

  FIG. 7 is a diagram for explaining the fuel consumption when the additional heat amount is generated in response to the heat use request. In the figure, (a) shows the fuel consumption [g / h] when operating at the engine shaft efficiency best point A, and (b) shows the case where the engine shaft efficiency is shifted from the best point A to the point A ′. The fuel consumption [g / h] is shown.

  At the engine shaft efficiency best point A, for example, about 25% of the fuel combustion energy of the engine 10 is converted into the shaft output of the engine 10 as kinetic energy, about 25% becomes a cooling loss, and the rest is an auxiliary machine loss or exhaust. Other losses such as loss. The heat energy corresponding to the cooling loss is recovered using the engine coolant as a medium, and the recovered heat is used for heating the vehicle interior or warming up the engine.

  If the required heat quantity Qreq increases with the heat utilization request and the required heat quantity Qreq cannot be satisfied only by the cooling loss at the engine shaft efficiency best point A, the additional heat quantity is calculated by the engine heat generation control. Generate as. At this time, the amount of fuel consumption increases with the generation of additional heat, but from the viewpoint of suppressing fuel consumption deterioration, it is desirable that the amount of increase in fuel accompanying the generation of additional heat is as small as possible. Therefore, the heat generation control determines the combination of the waste heat amount adjusting means (1), (2), (3) so that the amount of increase in fuel is minimized when the same amount of additional heat is generated. Control the occurrence of

  Further, according to the knowledge of the inventors of the present application, when a desired amount of engine waste heat is generated, the fuel increase amount for the heat generation is the engine operating point when the heat amount starts (the operating state of the engine 10). ). For example, when the required heat quantity Qreq cannot be satisfied when the engine 10 is controlled at the best shaft efficiency, it is necessary to increase the generated heat quantity of the engine 10 to compensate for the shortage of the required heat quantity Qreq.

  At this time, when the engine operating point when starting the heat increase is the operating point X in FIG. 5 and the operating point Y different from the operating point X, the same amount of engine waste heat is increased. The amount of fuel increase required is different. That is, the fuel increase amount (fuel increase rate) with respect to the engine generated heat amount varies depending on the engine operating point at the start of the heat amount increase. Further, the fuel increase rate differs depending on the outside air temperature in addition to the engine operating point.

  The fuel increase rate will be further described. The fuel increase rate is a parameter related to fuel consumption when increasing the amount of heat (waste heat amount) supplied to the cooling water from the engine 10 as a heat source. Specifically, the amount of heat generated by engine heat generation control (additional heat amount ΔQ) and waste heat amount adjustment means are combined so that the amount of fuel increase is minimized when the additional heat amount ΔQ is generated. This is the ratio to the increase in fuel injection amount (fuel increase amount ΔF). For example, as one of the fuel increase rates, a heat cost that is the amount of fuel consumed to supply a unit heat amount can be employed.

Heat cost Ct [g / kWh] = Fuel increase ΔF [g / h] / Additional heat ΔQ [kW]
FIG. 8 is a heat cost characteristic diagram showing the relationship of the heat cost Ct to the additional heat quantity ΔQ (supply heat quantity) at the engine operating point X (see FIG. 5). This heat cost characteristic diagram may be calculated based on experiments or the like in advance, or may be calculated each time based on a model or the like. This process corresponds to a process as a heat cost calculation unit. As shown in the figure, the heat cost Ct varies depending on the additional heat amount ΔQ. For example, the heat cost characteristic at the engine operating point X has a minimum point within the set range of the additional heat amount ΔQ.

  The relationship of the heat cost Ct to the additional heat quantity ΔQ is different for each engine operating point. For example, when a predetermined amount of additional heat quantity Q1 is generated, the operating point Y has a smaller heat cost Ct than the operating point X. Become. For this reason, when the amount of heat generated by the engine 10 is increased by the additional heat amount Q1, when the engine operating point at the start of the heat amount increase is Y, the amount of fuel increase is smaller than that at the operating point X. That is, when the amount of heat generated by the engine 10 is increased, there are cases where the heat energy of the engine 10 can be efficiently generated from the viewpoint of fuel efficiency and cases where it is not. Therefore, in this system, the heat cost characteristic diagram is calculated according to the engine operating point (the operating state of the engine 10).

  Further, in this system, in addition to the waste heat amount adjusting means (engine heat source), a heat pump system 30 (electric heat source) is provided as a heat source. For this reason, the heat cost characteristic diagram is also calculated for the heat pump system 30.

  Specifically, since heat is generated by the supplied power in the heat pump system 30, the amount of fuel consumed to supply this power from a power source such as the generator 41 is taken into consideration. Here, the amount of fuel consumed for supplying power is optimized so that the amount of fuel consumed by the entire power source for supplying power is minimized in S43 of FIG. 14 to be described later. When power is supplied by load distribution, the fuel consumption amount (power cost) per unit power for the supplied power is calculated and used.

  Next, details of the process of calculating the base heat quantity of each heat source in S13 of FIG. 3 will be described.

  In the engine heat source such as the waste heat amount adjusting means, as shown in FIG. 7, when the engine 10 is operated at the best engine shaft efficiency, the heat energy corresponding to the cooling loss is used as the base heat amount. The energy control device 51 receives information such as the engine operation state from the engine control device 52, and calculates the base heat amount based on the engine operation state and the like.

  The electric heat source such as the heat pump system 30 is based on the maximum amount of heat that can be created by the power supplied by the regenerative power generation of the generator 41 and the power supplied by the base power of the waste heat generator 25 during vehicle deceleration. The amount of heat. At that time, the energy control device 51 receives information such as the engine operation state from the engine control device 52, and calculates the base heat amount based on the engine operation state and the like. The base power of the waste heat generator 25 will be described later.

  Then, the energy control device 51 calculates the total base heat amount Qbas_all of the entire heat source by adding up the base heat amounts of the heat sources.

  Next, the details of the process of performing the optimization calculation so that the amount of fuel consumed in the entire heat source for supplying heat is minimized in S14 of FIG. 3 will be described.

  The energy control device 51 calculates the fuel consumption F corresponding to each of a plurality of points of the heat quantity Q supplied from each heat source based on the heat cost characteristic diagram of each heat source. Specifically, each fuel consumption F is calculated by the following equation.

Fuel consumption F = heat cost Ct x heat quantity Q
Then, based on a plurality of data of the heat quantity Q and the fuel consumption F, this is approximated to a quadratic function by the least square method or the like. That is, the fuel consumption amount F is expressed by a quadratic function of the amount of heat Q to be supplied. In each heat source, the relationship between the heat amount Q and the fuel consumption amount F is different. In general, the fuel consumption amount F can be approximated by a quadratic to quartic function of the amount of heat Q to be supplied.

Here, while supplying the required heat quantity Qreq by a plurality of heat sources, the supply load distribution of each heat source that minimizes the amount of fuel consumed by the plurality of heat sources as a whole can be obtained by solving the following optimization problem. . That is, the total required heat amount Qall, the supply heat amounts Q1, Q2,..., Qn of each heat source, and the fuel amounts F1, F2,.
Constraint: Qall = Q1 + Q2 + ... + Qn
Objective function: f = F1 (Q1) + F2 (Q2) + ... + Fn (Qn)
In this case, the supply load distribution of each heat source that minimizes the total fuel consumption f is a problem. The optimal solution to this problem can be obtained by Lagrange's undetermined multiplier method as follows.

Objective function: f (x1, x2,..., Xn)
Constraint: g1 (x1, x2,..., Xn) = 0
g2 (x1, x2,..., xn) = 0
g3 (x1, x2,..., xn) = 0
・
・
・
gm (x1, x2,..., xn) = 0
Decision variables: x1, x2, ..., xn
Introducing new variables λ1, λ2,..., Λm (Lagrange multipliers), the problem is converted into a problem with no constraints as in the following equation.

Objective function: L (x1, x2,..., Xn, λ1, λ2,..., Λm)
Decision variables: x1, x2,..., Xn, λ1, λ2,.
Here, L is called a Lagrangian function and is defined as the following equation.

L (x1, x2,..., Xn, λ1, λ2,..., Λm) = f (x1, x2,..., Xn) + λ1g1 (x1, x2,..., Xn) +・ + Λmg (x1, x2, ..., xn)
In general, a necessary condition for x1, x2,..., Xn to be optimal solutions of the original problem is expressed by the following equation.

この方式を、上述した各熱源の供給負荷配分の問題に適用すると、ラグランジュ関数は下式のように定義される。

When this method is applied to the above-described problem of supply load distribution of each heat source, the Lagrangian function is defined as follows.

最適解となるための必要条件は、各熱源の熱量Ｑｉとラグランジュ乗数λとに対する上記数式２の１階微分が、それぞれ０になることである。すなわち、下記の数式３，４を満足するＱ１，Ｑ２，・・・Ｑｎが、問題の最適解となる。

A necessary condition for an optimum solution is that the first-order derivatives of Equation 2 above with respect to the heat quantity Qi and Lagrange multiplier λ of each heat source become 0, respectively. That is, Q1, Q2,..., Qn satisfying the following mathematical formulas 3 and 4 are optimum solutions of the problem.

上記数式４は、制約条件そのものであることから、最適解は下式を満足する解として求めることができる。

Since Equation 4 is a constraint condition itself, the optimum solution can be obtained as a solution satisfying the following equation.

ここで、ｄＦ／ｄＱは、熱源から供給される熱量を微小量増加させた場合に、消費される燃料量がどれだけ増加するかを示すものであり、熱量増分燃料量と呼ぶこととする。上式は、この熱量増分燃料量が全ての熱源で等しいとき、すなわち各熱源の熱量増分燃料量が互いに一致するときに、複数の熱源全体で消費される燃料量が最も少なくなること意味している。この原理は、一般に等λ則と呼ばれている。

Here, dF / dQ indicates how much the amount of fuel consumed increases when the amount of heat supplied from the heat source is increased by a minute amount, and is referred to as a heat amount increment fuel amount. The above equation means that when this heat increment fuel amount is the same for all heat sources, that is, when the heat increment fuel amount of each heat source coincides with each other, the fuel amount consumed by the plurality of heat sources is the smallest. Yes. This principle is generally called the equal λ rule.

FIG. 9 is a graph showing the relationship between the supplied heat quantity Q and the heat quantity incremental fuel quantity dF / dQ. Here, it is assumed that the heat amount increment fuel amount dF / dQ of the heat sources 1, 2, and 3 has characteristics of λ1, λ2, and λ3, respectively. At this time, since the fuel consumption amount F is approximated by a quadratic function (aQ ² + bQ + c) of the heat quantity Q, when this function is first-order differentiated by the heat quantity Q, a linear function (2aQ + b) is obtained. Such a relationship between the supplied heat quantity Q and the calorific value incremental fuel quantity dF / dQ is referred to as a heat quantity relation. And the process which calculates this heat quantity relationship is equivalent to the process as a heat quantity relationship calculation means.

  In the figure, assuming a specific λs and drawing a straight line parallel to the horizontal axis, the intersection of this straight line and the heat quantity increment fuel amount of each heat source is obtained. At this time, the value of the calorie increment fuel amount is equal at each intersection, and the above formula 5 is satisfied. Therefore, if the total of the supplied heat amounts Q1, Q2, and Q3 at each intersection is equal to the total required heat amount Qall, the above equation 4 is also satisfied at the same time. In other words, the value of λs is changed to move the line up and down, and the position where the sum of the supplied heat amounts Q1, Q2, and Q3 at each intersection is equal to the total required heat amount Qall may be obtained.

  In general, each heat source has an upper limit value Qmax and a lower limit value Qmin of the amount of heat that can be supplied. For this reason, when the heat amount incremental fuel amount dF / dQ is changed to match each other in each heat source, the heat amount corresponding to the heat amount incremental fuel amount may reach the upper limit value Qmax or the lower limit value Qmin in some heat sources.

  In this case, in a plurality of heat sources in which the amount of heat to be supplied does not reach the upper limit value Qmax and the lower limit value Qmin, when the heat amount increment fuel amounts of the respective heat sources coincide with each other, the fuel amount consumed by these heat sources becomes the smallest. . On the other hand, in the heat source in which the amount of heat to be supplied reaches the upper limit value Qmax or the lower limit value Qmin, the heat amount increment fuel amount does not necessarily match with the other heat sources. Consumes the least amount of fuel.

  Therefore, the conditions of the optimum solution in consideration of the restrictions by the upper limit value Qmax and the lower limit value Qmin of the heat quantity that can be supplied in this way are expressed by the following mathematical formulas 6-8.

ここで、上記の数式６〜８の条件は、模式的に図１０のように表すことができる。

Here, the conditions of the above mathematical formulas 6 to 8 can be schematically represented as shown in FIG.

  That is, when the supplied heat amount reaches the upper limit value Qmax or the lower limit value Qmin, the supplied heat amount is limited by those values. Therefore, in order to make the supply heat amount of each heat source equal to the supply heat amount at the intersection of the heat amount increment fuel amount of each heat source and a specific λs, in the upper limit value Qmax and the lower limit value Qmin of the supply heat amount of each heat source, What is necessary is just to change heat amount incremental fuel amount up and down in parallel with a vertical axis | shaft, respectively. According to such a diagram, the supply heat amount of each heat source can be obtained as the supply heat amount at the intersection of the heat amount increment fuel amount of each heat source and a specific λs.

  For example, in the figure, the supplied heat amounts Q1 to Q3 of the heat sources 1 to 3 can be obtained as the supplied heat amounts at the intersections with the straight line of λs. That is, the supply heat amount Q1 of the heat source 1 is a supply heat amount Q1 between the lower limit value Q1min (= 0) and the upper limit value Q1max, and the supply heat amount Q2 of the heat source 2 is between the lower limit value Q2min (= 0) and the upper limit value Q2max. The amount of heat Q2 is supplied, and the amount of heat Q3 supplied from the heat source 3 is the upper limit value Q3max.

  Subsequently, based on the heat quantity relationship thus obtained, the relationship between the required heat quantity Qreq (total supply heat quantity) and the supply load distribution (optimum distribution heat quantity) of each heat source is calculated. Here, in order to simplify the description, a case where there are two heat sources will be described.

  As shown in FIG. 11, it is assumed that the heat amount increment fuel amount of the heat sources 1 and 2 with respect to the supplied heat amount is represented by λ1 and λ2, respectively. At this time, while optimally distributing the supply heat amounts of the heat sources 1 and 2, the total of the supply heat amounts Q1 and Q2 at that time is obtained.

  Specifically, the value of a specific λs is increased from the minimum amount of heat increment fuel amount (λmin) of the heat amount increment fuel amount when the supply heat amount of the heat sources 1 and 2 becomes the lower limit value, and the straight line is moved upward. . Then, from time to time, the supplied heat amounts Q1 and Q2 of the heat sources 1 and 2 at the intersection with the straight line of a specific λs, and the total Q1 + Q2 thereof are calculated. This process is performed up to the maximum heat amount increment fuel amount (λmax) among the heat amount increment fuel amounts when the heat amounts supplied to the heat sources 1 and 2 become the upper limit values. Then, the relationship between the total Q1 + Q2 (total supply heat amount) of the supply heat amounts Q1 and Q2 of the heat sources 1 and 2 and the supply heat amount Q1 and Q2 (optimally distributed heat amount) of each heat source is calculated.

  FIG. 12 is a diagram showing this relationship.

  As shown in the figure, for example, when the required heat quantity Qreq is Q1 + Q2, a point where the total supply heat quantity on the horizontal axis is Q1 + Q2 is searched for, and the optimum distribution heat quantities Q1, Q2 of the corresponding heat sources 1, 2 are calculated. What is necessary is just to read on a vertical axis | shaft. Therefore, when the required heat quantity Qreq is calculated, the optimum supply load distribution (supplied heat quantity Q1, Q2) of each heat source 1, 2 can be calculated.

  Next, in S15 of FIG. 3, the base heat quantity Qbas (for each heat source i (where i = 1 heat source is the engine cooling water heat quantity and i = 2 heat source is the heat pump) with respect to the required heat quantity Qreq. The details of the process of allocating i) and allocating the remaining required heat quantity Qreq_ref, which is the remainder of the required heat quantity Qreq, to each heat source i will be described.

  FIG. 13 shows a processing procedure for base heat amount distribution.

  It is determined whether or not the total base heat amount Qbas_all, which is the sum of the base heat amounts Qbas (i) of each heat source i, is equal to or greater than the required heat amount Qreq (S21). That is, it is determined whether the required heat quantity Qreq can be all allocated to the total base heat quantity Qbas_all, in other words, whether the required heat quantity Qreq can be supplied by the total base heat quantity Qbas_all.

  When it is determined that the total base heat amount Qbas_all is equal to or greater than the required heat amount Qreq (S21: YES), the counter i is reset (S22). Then, the remaining required heat quantity Qreq_ref, which is the remaining distribution of the required heat quantity Qreq to the base heat quantity Qbas (i) of each heat source i, is first set as the required heat quantity Qreq, and all the base heat quantities Qbas (i) are once set to 0 (S23). .

  Subsequently, it is determined whether or not the base heat amount Qbas (i) of the i-th heat source is equal to or greater than the remaining required heat amount Qreq_lev (S24). That is, it is determined whether the remaining required heat quantity Qreq_ref can be supplied by the base heat quantity Qbas (i) of the i-th heat source.

  In the above determination, when it is determined that the base heat amount Qbas (i) of the i-th heat source is not equal to or greater than the remaining required heat amount Qreq_ref (S24: NO), supply is requested for the base heat amount of the i-th heat source. The required base heat quantity Qabas (i) is set as the base heat quantity Qbas (i) (S25). That is, it requests the i-th heat source to supply all the base heat quantity Qbas (i).

  Subsequently, the remaining required heat amount Qreq_ref is updated to a value obtained by subtracting the base heat amount Qbas (i) of the i-th heat source from the remaining required heat amount Qreq_lev (S26), and the counter i is incremented by one (S27).

  In this way, the processes of S24 to S27 are repeated, and the remaining required heat amount Qreq_ref is sequentially distributed to the base heat amount Qbas (i) of each heat source i. If it is determined that the base heat quantity Qbas (i) of the i-th heat source is equal to or greater than the remaining required heat quantity Qreq_ref (S24: YES), the required base heat quantity Qabas (i) of the i-th heat source is left to be requested. The amount of heat is Qreq_ref (S28). That is, the remaining required heat quantity Qreq_ref remaining at the end is distributed to the base heat quantity of the i-th heat source.

  Subsequently, after the remaining required heat quantity Qreq_ref is set to 0 (S29), this series of processes is temporarily ended (END). That is, the remaining required heat quantity Qreq_ref remaining at the end is distributed to the base heat quantity of the i-th heat source, and therefore the remaining required heat quantity Qreq_ref is set to zero.

  On the other hand, when it is determined that the total base heat quantity Qbas_all is not equal to or greater than the required heat quantity Qreq (S21: NO), all the required base heat quantity Qabas (i) of the heat source i is set as the base heat quantity Qbas (i) (S31). That is, since the required heat quantity Qreq cannot be supplied by the total base heat quantity Qbas_all, all the heat sources i are requested to supply the base heat quantity Qbas (i).

  Subsequently, the remaining required heat amount Qreq_ref is updated to a value obtained by subtracting the total base heat amount Qbas_all from the remaining required heat amount Qreq_ref (S32), and this series of processes is temporarily ended (END).

  Next, for each heat source i, the distribution of the additional required heat quantity Qapl (i) that requires supply in addition to the base heat quantity Qbas (i) is determined.

  Here, when the remaining required heat amount Qreq_ref is 0, all the additional required heat amounts Qapl (i) of the heat sources i are set to 0. That is, in this case, it is not necessary to request each heat source i to supply a heat quantity other than the base heat quantity Qbas (i).

  On the other hand, when the remaining required heat amount Qreq_ref is not 0, the distribution of the additional required heat amount Qapl (i) of each heat source i is determined based on the above-described heat amount relationship when the remaining required heat amount Qreq_lev is supplied. That is, in the example of FIG. 12, the total required heat quantity (Q1 + Q2) is set as the remaining required heat quantity Qreq_ref, and the optimum distribution heat quantity (Q1, Q2) of each heat source i corresponding thereto is determined, and this is calculated as the additional required heat quantity Qapl (i). And Thereby, the heat quantity (heat quantity other than the base heat quantity) supplied in a state where the heat cost is not 0 can be optimally distributed to each heat source i. Note that this series of processing corresponds to processing as heat quantity distribution determining means.

  Thereafter, in S16 of FIG. 3, for each heat source i, as the sum of the allocated base heat amount (required base heat amount Qabas (i)) and the allocated additional required heat amount Qapl (i), the command heat amount Qa for each heat source i. (I) is calculated.

  The energy control device 51 transmits the command heat amount Qa (i) for each heat source i to the air conditioning control device 54 and the engine control device, and the command heat amount Qa (i) is supplied to the air conditioning control device 54 and the engine control device. Thus, each heat source i is controlled. At this time, the air-conditioning control device 54 controls the driving state of the electric pump 22 and the blower fan 24 so that the amount of heat supplied from the heater core 23 to the vehicle interior becomes the command heat amount Qa (1). Further, in the heat generation control, the amount of heat generated by the engine is controlled using each engine waste heat amount adjusting means so as to generate the command heat amount Qa (1).

  Further, the air conditioning control device 54 issues a command to the heat pump control device 38 to control the amount of heat supplied from the heat pump system to the vehicle interior to become the commanded heat amount Qa (2). At the same time, the air conditioning controller 54 calculates the power necessary for the heat pump system to generate the command heat quantity Qa (2).

  Similarly, details of the process of each step in the power supply control executed in parallel with the heat supply control will be described.

  First, in S41 of FIG. 14, the procedure for calculating the power cost, which is the amount of fuel consumed to supply unit power at each power source, and the details of the processing for calculating the base power of each power source in S42 of FIG. Will be described.

  The power cost of the generator 41 is to calculate an increase torque ΔTe required for the engine with respect to the engine torque when the generated power is zero in order to generate the generated power P of the generator 41, and to generate this increase torque ΔTe. Can be calculated by dividing the fuel increase amount ΔF by the generated power P.

  The increased torque ΔTe can be calculated based on the generated power, the power generation efficiency of the generator 41, and the engine speed. The fuel increase amount ΔF required to generate the increase torque ΔTe changes in the fuel consumption rate (for example, from Y to Y ′ in FIG. 5) due to the engine operating point changing to the engine torque increase side. Change), and a change in fuel consumption caused by the change can be calculated. Further, the generator 41 performs regenerative power generation based on the rotational force transmitted from the wheels 15 to the engine 10 via the transmission 12 or the like when the vehicle is decelerated. For this reason, when regenerative power generation is performed by the power generator 41 when the vehicle is decelerated, the power cost of the power generator 41 is 0, so the base power is set to the maximum regenerated power that can be regenerated. In addition, the base power when the regenerative power generation is not performed becomes zero.

  Since the waste heat generator 25 generates power using the heat of the cooling water of the engine 10, the increased amount of fuel generated by an increase in engine friction loss or the like when the cooling water temperature decreases due to this power generation reduces the power. Consider the amount of fuel consumed to supply.

  Here, the relationship between the coolant temperature of the engine 10 and the fuel consumption is expressed as shown in FIG. This relationship can be calculated in advance based on experiments or the like.

  As shown in the figure, when the cooling water temperature is higher than the base temperature Twb, the fuel can be generated even if the generated power of the waste heat power generation is increased (the cooling temperature is lowered) until the cooling water temperature reaches the base temperature Twb. Consumption does not increase.

  On the other hand, as the cooling water temperature becomes lower than the base temperature Twb, the frictional resistance of the engine 10 increases and the fuel consumption increases. For this reason, as shown in the figure, for example, when the current cooling water temperature is Tw2, and when waste heat power generation is performed, the cooling water temperature is decreased by ΔTw and the temperature is predicted to become Tw1, the fuel It can be considered that the amount of consumption increases by ΔF, and fuel is consumed by ΔF by waste heat power generation.

  Therefore, the power cost of the waste heat generator 25 can be calculated from the relationship between the cooling water drop temperature ΔTw accompanying the power generation by the waste heat generator 25 and the fuel increase amount ΔF corresponding to the drop temperature ΔTw. This decrease temperature ΔTw can be calculated based on the power generation amount of the waste heat generator 25, the power generation efficiency, and the heat capacity of the cooling water system.

  The relationship between the power supplied to the waste heat generator 25 (waste heat power) and the amount of fuel consumed to supply the power (fuel increase amount ΔF) is expressed as shown in FIG.

  As shown in the figure, when the waste heat generated power is smaller than the base power Pbas, the fuel increase amount ΔF becomes zero. This base power Pbas corresponds to the base temperature Twb of FIG. 15, and when the waste heat power generation power is smaller than the base power Pbas, it means that the cooling water temperature does not fall below the base temperature Twb. . When the waste heat power generation power becomes larger than the base power Pbas, the cooling water temperature decreases below the base temperature Twb, and the fuel increase amount ΔF increases with the decrease.

  Then, based on the supply power of the waste heat generator 25 and the amount of fuel consumed to supply the power, the power cost of the waste heat generator 25 is calculated for a portion where the heat generation power is larger than the base power Pbas. . Specifically, the power cost is calculated by dividing the fuel increase amount ΔF by the difference between the waste heat generated power P and the base power Pbas. Thereby, about the waste heat generator 25, the electric power cost characteristic figure which shows the relationship of the electric power cost with respect to supply electric power is created.

  Then, the base power of each power source is summed to calculate the total base power Pbas_all of the entire power source. The power cost of the battery 43 will be described later. Further, the base power of the battery 43 is zero.

  Next, the details of the process of performing the optimization calculation so that the amount of fuel consumed by the entire power supply for supplying power is minimized in S43 of FIG. 14 will be described. The procedure of this process is the same as that in the case of the heat quantity described above. In other words, the heat quantity Q, the heat quantity increment fuel quantity dF / dQ, and the heat quantity relationship may be replaced with the power P, the power increment fuel quantity dF / dP, and the power relation, respectively, and an optimum solution may be obtained by the Lagrange's undetermined multiplier method. This process corresponds to a process as power increment fuel amount calculation means.

  Here, the following points are different from the case of calorific value.

  First, the optimal supply load distribution of each power supply is determined for a plurality of power supplies (waste heat generator 25, generator 41) excluding the battery 43. This process corresponds to a process as power distribution determining means. The procedure of this process is the same as that in the case of the heat quantity described above. At that time, the energy control device 51 (power relation calculating means) calculates the power relation in each power source in accordance with the operating state of the engine 10.

  Next, when power is supplied from each power source excluding the battery 43 by the above optimal supply load distribution, the optimal power cost obtained by dividing the total amount of fuel consumed by each power source excluding the battery 43 by the required power is obtained. calculate. Then, based on the power and the optimum power cost, the total power source excluding the battery 43 is regarded as one power source, and the amount of fuel consumed to supply power is a function of the power. A power increment fuel amount that is a differential value obtained by differentiating the function with electric power is calculated.

  That is, when the amount of fuel consumed by the whole of the plurality of power supplies excluding the battery 43 is minimized, the plurality of power supplies excluding the battery 43 are regarded as one total power supply, and the power increment fuel amount is calculated for this total power supply. Then, a power relationship that is a relationship between the power and the power increment fuel amount in the total power source is calculated.

  In the battery 43, it can be considered that the amount of fuel consumed for charging is the amount of fuel consumed for supplying electric power. Therefore, in the battery 43, the power increment fuel amount does not change with respect to the supplied power. In other words, the battery 43 can change the supplied power without changing the power increment fuel amount.

  Here, the amount of fuel consumed for charging the battery 43 is determined by optimizing the supply load distribution of the generator 41 and the waste heat generator 25 which are power sources excluding the battery 43, and then the generator 41 and the waste heat generator. It calculates based on the electric power which 25 each supplies, and each electric power cost. In the battery 43, since the power increment fuel amount does not change with respect to the supplied power, the power increment fuel amount becomes equal to the power cost.

  FIG. 17 shows a power relationship that is a relationship between the supplied power P and the power increment fuel amount dF / dP for the power source 1 (battery 43) and the power source 2 (total power source). Based on this power relationship, the relationship between the total power supplied to each power supply (total power supply) and the power supplied to each power supply (optimally distributed power) is calculated.

  As shown in the figure, it is assumed that the power increment fuel amounts of the power sources 1 and 2 with respect to the supplied power are represented by λ1 and λ2, respectively. At this time, the supply power of the power sources 1 and 2 is optimally distributed, and the sum of the supply power P1 and P2 at that time is obtained.

  Specifically, since the power increment fuel amount (λ1) of the battery 43 is a constant value (λ1s), the power increment fuel amount of the power source 1 and the power increment fuel amount of the power source 2 coincide with each other at a specific λs. Only when it matches λ1s. For this reason, when the specific λs is smaller than the constant value λ1s, the power P2 supplied from the power source 2 is obtained by the intersection of the power increment fuel amount (λ2) of the power source 2 and the straight line of the specific λs. The electric power P1 supplied from is 0. When the specific λs coincides with the constant value λ1s, the power P2 supplied from the power source 2 becomes constant and the supplied power P1 of the power source 1 increases. After the supply power P1 of the power source 1 reaches the upper limit value P1max, the power P1max supplied from the power source 2 becomes constant, and the power source 2 is determined by the intersection of the power increment fuel amount (λ2) of the power source 2 and a specific λs line. The electric power P2 supplied from is obtained.

  Then, from time to time, the supply power P1, P2 of each power source 1, 2 at the intersection with a specific λs straight line, and their total P1 + P2 are calculated. This relationship is illustrated in FIG. Based on this figure, a point where the total supply power on the horizontal axis becomes the required power Preq may be found, and the optimum distribution powers P1 and P2 of the corresponding power sources 1 and 2 may be read on the vertical axis. Therefore, when the required power Preqa is calculated, it is possible to calculate the optimum supply load distribution (supply power P1, P2) of each power source 1 (battery), 2 (total power source). As a result, the optimal supply load distribution to the waste heat generator 25 and the generator 41 constituting the total power supply with respect to the supply load distribution (supply power P2) to the power supply 2 (total power supply) is calculated as described above. Therefore, the optimal supply load distribution of each power source including the battery 43 can be calculated. This process corresponds to a process as power distribution determining means.

  Next, in S44 of FIG. 14, the heat cost of the heat pump system 30 is calculated based on the power supply load distribution optimized in this way. In the heat supply control described above, the heat pump system 30 is thus treated as described above. Use the calculated heat cost. The heat cost calculation process of the heat pump system 30 is an integrated process with the heat cost calculation process of S12 of FIG.

  Next, in S45 of FIG. 14, the electric power required for the heat pump system 30 to supply heat is received from the air conditioning controller 54, and other electric loads (load 42, electric pump 22, compressor inverter 32, etc.). Receives the required power and calculates the required load power Preq based on the received power.

  Next, the details of the process of calculating the required charging power Preqc required to be supplied to the battery 43 for charging from the power supply excluding the battery 43 in S46 of FIG. 14 will be described.

  FIG. 19 shows the order of processing steps for calculating the required charging power Preqc. This process is executed by the energy control device 51.

  As shown in the figure, an upper limit value Pcmax of power for charging the battery 43 is calculated (S71). The upper limit value Pcmax is set as the maximum power value at which the voltage of the battery 43 does not exceed a predetermined value during charging in the current state of the battery 43 (battery temperature or the like). When the capacity of the battery 43 is equal to or greater than the determination value and cannot be charged, the upper limit value Pcmax is set to zero.

  Subsequently, the required charging power Preqc1 for the total base power Pbas_all is calculated (S72). Here, when the load demand power Preq is larger than the total base power Pbas_all, the charge demand power Preqc1 is set to 0, and the remaining load demand power Preq_lev that is power that cannot be covered by the total base power is calculated from the load demand power Preq. A value obtained by subtracting the total base power Pbas_all. That is, since the total base power Pbas_all is all allocated to the load required power Preq, the charge required power Preqc1 for the total base power Pbas_all is set to 0. On the other hand, when the load required power Preq is smaller than the total base power Pbas_all, the remainder obtained by subtracting the load required power Preq from the total base power Pbas_all is set as the charge required power Preqc1, and the remaining load required power Preq_lev is set as 0.

  Subsequently, a charging power cost Cc, which is the amount of fuel consumed for charging the battery 43 with unit power, is calculated (S73). The amount of fuel consumed for charging the battery 43 is the total value of the fuel consumption of each power supply when the remaining load demand power Preq_lev is supplied by the optimal supply load distribution (calculated in S43) of each power supply including the battery. From the above, the total power of the remaining load required power Preq_lev and the charging power Pc with respect to other than the total base power is increased when the optimal power distribution (calculated in S43) is supplied from a plurality of power sources (total power sources) excluding the battery. It is represented by an increase amount ΔFc of the total fuel consumption of the total power source, and is represented as a function with respect to the charging power Pc.

  The increase amount ΔFc is an increase in fuel consumption with respect to the case where charging is not performed when charging is performed with the charging power Pc, and the charging power cost Cc is obtained by dividing the increase amount ΔFc by the charging power Pc. Here, the maximum value of the charging power Pc is the maximum power that the total power supply can supply other than the base power by Preq_ref + Pc, and the sum of the charging power Pc and the charging required power Preqc1 is the power when charging. It calculates | requires in the range which does not exceed upper limit Pcmax.

  Subsequently, a reference power cost Cprf serving as a reference for whether or not the battery 43 is charged is calculated (S74). As shown in FIG. 20, the reference power cost Cprf increases as the remaining battery capacity decreases, and increases as the load required power Preq increases.

  Subsequently, charge request power Preqc2 other than the total base power Pbas_all is calculated (S75). Here, as shown in FIG. 21, when the charging power cost Cc is compared with the reference power cost Cprf and there is no charging power Pc in which the charging power cost Cc is smaller than the reference power cost Cprf, the battery 43 Therefore, the battery 43 is not charged.

  On the other hand, as shown in FIG. 22, when there is a charging power Pc in which the charging power cost Cc is smaller than the reference power cost Cprf, the charging power cost Cc is the largest within the range in which the charging power cost Cc is smaller than the reference power cost Cprf. The charging power Pc is set as the charging required power Preqc2 other than the total base power Pbas_all.

  Thereafter, a charge request power Preqc that is the sum of the charge request power Preqc1 for the total base power Pbas_all and the charge request power Preqc2 for other than the total base power Pbas_all is calculated (S76). At this time, when the required charging power Preqc exceeds the upper limit value Pcmax of the power for charging the battery 43, the required charging power Preqc is set to the upper limit value Pcmax. Then, this series of processes is temporarily terminated. Note that this series of processing corresponds to processing as charge request power calculation means.

  Next, in S47 of FIG. 14, the base power Pbas (i) of each power source i is distributed to the total required power Preqa that is the sum of the load required power Preq and the charge required power Prec, and the remaining total required power Preqa is used. Details of the process of allocating a certain remaining required power Preqa_ref to each power source i will be described.

  FIG. 23 shows a processing procedure for base power distribution. Note that this procedure is basically the same as the procedure for allocating the base heat quantity shown in FIG.

  It is determined whether or not the total base power Pbas_all, which is the sum of the base power Pbas (i) of each power source i, is equal to or greater than the total required power Preqa (S51).

  When it is determined that the total base power Pbas_all is equal to or greater than the total required power Preqa (S51: YES), the counter i is reset (S52). Then, the remaining request that is the remaining distribution of the total required power Preqa to the base power Pbas (i) of each power source i (where i = 1 is the waste heat generator 25 and i = 2 is the generator 41). First, the power Preqa_ref is set to the total required power Preqa, and all base power Pbas (i) is once set to 0 (S53).

  Subsequently, it is determined whether or not the base power Pbas (i) of the i-th power supply is equal to or greater than the remaining required power Preqa_ref (S54).

  In the above determination, if it is determined that the base power Pbas (i) of the i-th power supply is not equal to or greater than the remaining required power Preqa_ref (S54: NO), the base power of the i-th power supply is requested to be supplied. The requested base power Pabas (i) is set as the base power Pbas (i) (S55).

  Subsequently, the remaining required power Preqa_ref is updated to a value obtained by subtracting the base power Pbas (i) of the i-th power source from the remaining required power Preqa_ref (S56), and the counter i is incremented by one (S57).

  In this way, the processing of S54 to S57 is repeated, and the remaining required power Preqa_ref is sequentially distributed to the base power Pbas (i) of each power source i. If it is determined that the base power Pbas (i) of the i-th power source is equal to or greater than the remaining required power Preqa_ref (S54: YES), the requested base power Pbas (i) of the i-th power source is left as the remaining request. The power is Preqa_ref (S58).

  Subsequently, after the remaining required power Preqa_ref is set to 0 (S59), this series of processing is once ended (END).

  On the other hand, when it is determined that the total base power Pbas_all is not equal to or greater than the total required power Preqa (S51: NO), all the required base power Pabas (i) of the power source i is set as the base power Pbas (i) (S61).

  Subsequently, the remaining required power Preqa_ref is updated to a value obtained by subtracting the total base power Pbas_all from the remaining required power Preqa_ref (S62), and this series of processes is temporarily ended (END).

  Next, for each power source i, distribution of the additional required power Papl (i) that requests supply other than the base power Pbas (i) is determined.

  Here, when the remaining required power Preqa_ref is 0, the additional required power Papl (i) of each power source i is set to 0.

  On the other hand, if the remaining required power Preqa_ref is not 0, the distribution of the additional required power Papl (i) of each power source i is determined based on the power relationship described above when the remaining required power Preqa_ref is supplied.

  At this time, if the required charging power Preqc of the battery 43 is 0, power is also supplied from the battery 43. Specifically, from the optimal supply load distribution of each power source including the battery 43 calculated in S43, the distribution power to the battery 43 and the total power source when the total supply power is the remaining required power Preqa_ref is determined, and The waste heat generator in the case where the total supply power of the total power source is set to the distribution power to the total power source from the optimal supply load distribution to the waste heat generator 25 and the generator 41 constituting the total power source calculated in S43. 25 and supply load distribution to the generator 41 are determined to be additional required power Papl (1) and Papl (2), respectively.

  If the required charging power Preqc of the battery 43 is not 0, the battery 43 is charged. At this time, since power cannot be supplied from the battery 43, the total supply power of the total power source remains from the optimal supply load distribution to the waste heat generator 25 and the generator 41 constituting the total power source calculated in S43. The supply load distribution to the waste heat generator 25 and the generator 41 in the case of the required power Preqa_ref is determined and set as additional required power Papl (1) and Papl (2), respectively.

  Thereby, the power (power other than the base power) supplied in a state where the power cost is not 0 can be optimally distributed to each power source i.

  Next, in S48 of FIG. 14, for each power source i, as the sum of the allocated base power (requested base power Pabas (i)) and the allocated remaining required power (additional required power Papl (i)), The command power Pa (i) for the power source i is calculated.

  The energy control device 51 transmits the command power Pa (i) for each power source i to the generator control device 53, and controls each power source i so that the command control power Pa (i) is supplied to the generator control device 53. To do.

  Next, in S <b> 49 of FIG. 14, the energy control device 51 updates the power cost of the battery 43 based on the required charging power Preqc and the amount of fuel consumed by the charging. That is, the total amount of fuel obtained by adding the amount of fuel consumed this time to the amount of fuel consumed so far to charge the battery 43 is obtained. Here, the amount of fuel charged to charge the battery 43 this time is obtained from the relationship between the charging power Pc and the charging power cost Cc. Further, a total electric energy obtained by adding the electric power supplied this time to the electric power supplied to charge the battery 43 until then is obtained. Then, the new fuel cost of the battery 43 is calculated by dividing the total fuel amount by the total power amount.

  The embodiment described above has the following advantages.

  -Required heat quantity Qreq required to be supplied from a plurality of heat sources (heat quantity of cooling water, heat pump system 30) to the heat exchange section (heater core 23, indoor heat exchanger 37), that is, supplied from the plurality of heat sources to the heat exchange section The amount of heat to be calculated is calculated. On the other hand, for each heat source i, the relationship between the amount of heat to be supplied and the heat cost Ct is calculated.

  Based on the relationship between the heat amount supplied from each heat source i and the heat cost Ct, the total heat amount supplied from the plurality of heat sources matches the required heat amount Qreq, and the heat cost Ct of the entire heat source supplying the heat Is determined so that heat is supplied from each heat source i. Therefore, the required heat quantity Qreq can be supplied from the plurality of heat sources to the heat exchanging unit, and the amount of fuel consumed by the whole of the plurality of heat sources can be minimized.

  The fuel amount Fi (Qi) consumed for supplying heat in each heat source i is a function of the heat amount Qi, and a heat amount incremental fuel amount dF / dQ, which is a differential value obtained by differentiating the function of the heat amount Qi by the heat amount Qi, is calculated. Is done. The state in which the heat amount increment fuel amounts of the heat sources i coincide with each other is a state in which the amount of fuel consumed cannot be further reduced. Therefore, by determining the supply load distribution of each heat source i so as to form the state, the total fuel consumption f consumed by the plurality of heat sources as a whole can be minimized.

  Then, the distribution of supplying heat from each heat source i is determined so that the total amount of heat supplied from the plurality of heat sources matches the required heat amount Qreq and the heat amount incremental fuel amount of each heat source i matches each other. Therefore, the required heat quantity Qreq can be supplied from the plurality of heat sources to the heat exchanging section, and the total fuel consumption f consumed by the plurality of heat sources as a whole can be minimized. Furthermore, when determining the optimal supply load distribution for each heat source i, it is not necessary to calculate the total number of combinations, so that an increase in calculation load can be suppressed.

  A heat quantity relationship that is a relation between the heat quantity Qi and the heat quantity incremental fuel quantity is calculated for each heat source i. For this reason, when the heat amount incremental fuel amount is changed so as to coincide with each other at each heat source i, the heat amount Qi corresponding to the heat amount incremental fuel amount can be calculated based on the heat amount relationship in each heat source i.

  Since the distribution of supplying the heat amount from each heat source i is determined so that the total heat amount Qi of each heat source i matches the required heat amount Qreq, the entire plurality of heat sources can be controlled while further suppressing the increase in calculation load. The total amount of fuel consumed f consumed in the process can be minimized.

  The upper limit value Qimax of the heat quantity Qi that can be supplied in each heat source i is set, and the heat quantity incremental fuel quantity is increased by being matched with each other in each heat source i, and the heat quantity i corresponds to the heat quantity incremental fuel quantity based on the heat quantity relationship. The amount of heat Qi to be calculated is calculated. Then, in the heat source i whose heat amount Qi has reached the upper limit value Qimax, the heat amount Qi to be supplied is set to the upper limit value Qimax, and the heat amount Fj (Qj) consumed by the other heat sources j is minimized. The distribution for supplying the heat quantity from j is determined.

  That is, in the heat source j in which the amount of heat Qj to be supplied has not reached the upper limit value, the heat amount increment fuel amount of each heat source j is increased by being matched with each other. The amount of heat from each of the heat sources i and j is set such that the sum of the amount of heat Qj supplied from these heat sources j and the amount of heat Qi of the heat source i whose supplied heat amount Qi has reached the upper limit value Qimax matches the required heat amount Qreq. The distribution for supplying Qi and Qj is determined. Therefore, the fuel amount Fj (Qj) consumed by the heat source j whose supplied heat amount Qj has not reached the upper limit value can be minimized, and the total consumed fuel amount f consumed by the plurality of heat sources as a whole is minimized. can do.

  -The said calorie | heat amount relationship in each heat source i is calculated according to the driving | running state of the engine 10 mounted in the vehicle. For this reason, the distribution for supplying the heat quantity Qi from each heat source i can be appropriately determined according to the operating state of the engine 10 at that time.

  The plurality of heat sources include heat generation control of the engine 10 that supplies heat to the heater core 23 via the cooling water of the engine 10 mounted on the vehicle, and the engine 10 is equipped with an electric pump 22 that discharges the cooling water. Has been. And since the discharge amount of the cooling water by the electric pump 22 is controlled based on the heat amount supplied from the heat generation control, the heat amount supplied to the heater core 23 can be appropriately controlled.

The plurality of heat sources includes a heat pump system 30 that converts electric power into heat and supplies the heat, and the heat pump system 30 generates heat based on an electric power cost Cp that is an amount of fuel consumed to supply unit electric power. Cost Ct is calculated. For this reason, the power cost Cp of the heat pump system 30 can be converted into the heat cost Ct, and the distribution for supplying heat from each heat source i can be determined based on the heat cost Ct.
A plurality of power sources (generator 41, waste heat generator 25, battery 43) are mounted on the vehicle, and an electric load including the heat pump system 30 (electric pump 22, compressor inverter 32, load 42, etc.) from the plurality of power sources. ) To be supplied to the electric load including the heat pump system 30 is calculated. On the other hand, for each power source i, the relationship between the supplied power Pi and the power cost Cp is calculated.

  Then, based on the relationship between the power Pi supplied from each power source i and the power cost Cp, the total power supplied from the plurality of power sources matches the load required power Preq and supplies the load required power Preq. The distribution for supplying power Pi from each power source i is determined so that the overall power cost is minimized. For this reason, the required load power Preq can be supplied from a plurality of power supplies to the electric load including the heat pump system 30, and the total fuel consumption f consumed by the entire plurality of power supplies can be minimized.

  Then, the heat cost Ct is calculated for the heat pump system 30 based on the minimum power cost. For this reason, the heat cost Ct of the heat pump system 30 can be calculated in a state in which the distribution of supplying power Pi from each power source i (the supply load distribution of each power source i) is optimized. Since the distribution for supplying heat from each heat source i is determined based on this heat cost Ct, even if the plurality of heat sources include the heat pump system 30, the total consumed fuel consumed by the plurality of heat sources as a whole The amount f can be minimized.

  The power increment fuel amount dF / dP, which is a differential value obtained by differentiating the function of the power Pi with the power Pi, with the fuel amount Fi (Pi) consumed for supplying the power Pi at each power source i as a function of the power Pi, Calculated. Then, the distribution of supplying power from each power source i is determined so that the total power supplied from the plurality of power sources matches the load demand power Preq and the power increment fuel amount of each power source i matches each other. . For this reason, the required load power Preq can be supplied from a plurality of power supplies to the electric load including the heat pump system 30, and the total fuel consumption f consumed by the entire plurality of power supplies can be minimized. Furthermore, when determining the optimum supply load distribution for each power source i, it is not necessary to calculate the brute force combination, so that an increase in calculation load can be suppressed.

  A power relationship that is a relationship between the power Pi and the power increment fuel amount is calculated for each power source i. For this reason, when the power increment fuel amount is changed to match each other at each power source i, the power Pi corresponding to the power increment fuel amount can be calculated based on the power relationship at each power source i.

  And since the distribution which supplies electric power Pi from each power supply i is determined so that the sum total of the electric power Pi of each power supply i corresponds to load request | requirement electric power Preq, while further suppressing the increase in calculation load, The total fuel consumption f consumed by the entire power supply can be minimized.

  The upper limit value Pimax of the electric power Pi that can be supplied at each power source i is set, and the electric power increment fuel amount is increased by being matched with each other at each power source i, and the power source i corresponds to the electric power increment fuel amount based on the electric power relationship. The power Pi to be calculated is calculated. Then, in the power source i whose power Pi has reached the upper limit value Pimax, the power Pi to be supplied is set to the upper limit value Pimax, and the power amount Fj (Pj) consumed by the other power sources j is minimized. The distribution for supplying power Pj from j is determined.

  That is, in the power source j where the supplied power Pj does not reach the upper limit value Pjmax, the power increment fuel amount of each power source j is increased by being matched with each other. Then, from each power source i, j, the total of the power Pj supplied from these power sources j and the power Pi of the power source i for which the supplied power Pi has reached the upper limit value Pimax matches the load required power Preq. The distribution for supplying the electric power Pi and Pj is determined. Therefore, the amount of fuel Fj (Pj) consumed by the power source j whose supplied power Pj does not reach the upper limit value Pjmax can be minimized, and the total amount of fuel consumed f consumed by all the plurality of power sources can be minimized. Can be reduced.

  The plurality of power sources include the battery 43, and the power increment fuel amount with respect to the electric power in the battery 43 is set to a constant value λ1s. Then, the power increment fuel amount is made to coincide with each other at each power source i to be the above-mentioned constant value λ1s, and the power Pi corresponding to the power increment fuel amount is calculated based on the power relationship at each power source i. At this time, in the power source k (waste heat generator 25, generator 41) excluding the battery 43, when the power increment fuel amount is set to a constant value λ1s, the power corresponding to the power increment fuel amount becomes a specific value. It will be fixed.

  Then, the electric power P1 supplied from the battery 43 is determined so that the sum of the electric power P1 supplied from the battery 43 and the electric power P2 supplied from the other power source k matches the load required electric power Preq. For this reason, when supplying electric power from the battery 43 and other power sources k, the load required power Preq can be supplied, and the total consumed fuel amount f can be minimized.

  The vehicle is equipped with a plurality of power sources including the battery 43, and the required load power Preq required to be supplied to the electric load including the heat pump system 30 is calculated. Further, the required charging power Preqc required to be supplied for charging from the power source k excluding the battery 43 to the battery 43 is calculated. On the other hand, for each power source i, the relationship between the supplied power Pi and the power cost Cp is calculated.

  Based on the relationship between the power Pi supplied from each power source i and the power cost Cp, the total power supplied from the plurality of power sources k excluding the battery 43 is the sum of the load required power Preq and the charge required power Preqc. The distribution of supplying power from each power source k excluding the battery 43 is determined so that the power cost Cp of the entire power source that supplies the power matches the certain required power Preqa. Therefore, the total required power Preqa including the power used for charging the battery 43 can be supplied, and the total fuel consumption f consumed by the plurality of power supplies excluding the battery 43 can be minimized. it can.

  In each power source k excluding the battery 43, the power increment fuel that is a differential value obtained by differentiating the function of the power Pk with the power Pk, with the fuel amount Fk (Pk) consumed to supply the power Pk as a function of the power Pk. The quantity dF / dP is calculated. Then, the distribution for supplying the electric power Pk from each power source k excluding the battery 43 is determined so that the power increment fuel amounts of the respective power sources k excluding the battery 43 coincide with each other. For this reason, the amount of fuel consumed by the entire plurality of power supplies excluding the battery 43 can be minimized. Furthermore, when determining the optimal supply load distribution for each power source k, it is not necessary to calculate the combination in a brute force manner, so that an increase in calculation load can be suppressed.

  A power relationship that is a relationship between the power Pi and the power increment fuel amount is calculated for each power source i. For this reason, when the power increment fuel amount is changed to match each other at each power source k except the battery 43, the power Pk corresponding to the power increment fuel amount can be calculated based on the power relationship at each power source k except the battery. it can.

  Since the distribution for supplying the power Pk from each power source k excluding the battery 43 is determined so that the total power Pk of the power sources k matches the total required power Preqa, the increase in calculation load is further suppressed. However, the amount of fuel consumed by all of the plurality of power supplies excluding the battery 43 can be minimized.

  The upper limit value Pimax of the electric power Pi that can be supplied at each power source i is set, and the electric power relations at each power source k excluding the battery 43 are increased while the power increment fuel amounts are made to coincide with each other at each power source k excluding the battery 43. The electric power Pk corresponding to the electric power increment fuel amount is calculated based on the above. Then, in the power source k whose power Pk has reached the upper limit value Pkmax, the power Pk to be supplied is set to the upper limit value Pkmax, and the battery 43 so that the fuel amount Fl (Pl) consumed by the other power sources 1 is minimized. The distribution for supplying power from each power source k except for is determined.

  That is, in the power source 1 in which the supplied power Pl does not reach the upper limit value Plmax, the power increment fuel amount of each power source 1 is increased by being matched with each other. Each power source except the battery 43 is set such that the sum of the power Pl supplied from the power source l and the power Pk of the power source k at which the supplied power Pk reaches the upper limit value Pkmax matches the total required power Preqa. The distribution for supplying power from k is determined. Therefore, the amount of fuel Fl (Pl) consumed by the power source 1 in which the supplied power Pl does not reach the upper limit value Plmax can be minimized, and as a result, the total consumed fuel consumed by all the plurality of power sources excluding the battery 43 The amount f can be minimized.

  When the power Pk is supplied from each power source k excluding the battery 43 by the above distribution (optimal supply load distribution of each power source k) and the battery 43 is charged, the charge amount of the battery 43 is increased by a unit charge amount. Therefore, the charging power cost Cc, which is the amount of fuel consumed for this purpose, is calculated.

  Since the charge request power Preqc is calculated within a range where the charge power cost Cc is smaller than the reference power cost Cprf, the supply load distribution of each power source k excluding the battery 43 is optimized, and the power sources The battery 43 can be charged in a state where the total amount of fuel consumed f is less than the standard. Furthermore, since the maximum power is set as the required charging power Preqc within a range where the charging power cost Cc is smaller than the reference power cost Cprf, the battery 43 can be charged efficiently. As a result, the amount of fuel consumed by the entire plurality of power sources can be reduced through charging and discharging of the battery 43.

  When the power is supplied from each power source k excluding the battery 43 by the above distribution, the optimum power cost is calculated by dividing the total amount of fuel consumed by each power source k excluding the battery 43 by the total required power Preqa. . Then, based on the power and the optimum power cost, the fuel amount F2 (P2) consumed to supply the power P2 is calculated as the power P2 in the total power source that is regarded as one power source by adding the power sources excluding the battery 43. As a function of, a power increment fuel amount that is a differential value obtained by differentiating the function of the power P2 by the power P2 is calculated. That is, when the amount of fuel F2 (P2) consumed by all the plurality of power supplies excluding the battery 43 is minimized, the plurality of power supplies excluding the battery 43 is regarded as one total power supply, and the power incremental fuel is used for this total power supply. A quantity is calculated.

  Then, a power relationship that is a relationship between the power P2 and the power increment fuel amount is calculated in the total power source, and the power increment fuel amount with respect to the power P1 is set to a constant value in the battery 43. Here, in the total power source, when the power increment fuel amount is a constant value, the power P2 corresponding to the power increment fuel amount is fixed to a specific value. On the other hand, in the battery 43, the supplied power P1 can be changed in a state where the power increment fuel amount is set to the constant value λ1s.

  Further, when the required charging power Preqc is 0, the power P <b> 1 can be supplied from the battery 43. Then, the power P1 supplied from the battery 43 is determined so that the sum of the power P1 supplied from the battery 43 and the power P2 supplied from the total power supply matches the total required power Preqa. For this reason, when supplying electric power from the battery 43 and other power sources k, the total required power Preqa can be supplied, and the total fuel consumption f can be minimized.

  -The above-mentioned electric power relation in each power source i is calculated according to the operating state of engine 10 mounted in the vehicle. For this reason, according to the driving | running state of the engine 10 at that time, the distribution which supplies electric power Pi from each power supply i can be determined appropriately.

  It is not limited to the said embodiment, For example, it can also implement as follows.

  When the optimum supply load distribution of each power supply is determined for a plurality of power supplies (waste heat generator 25, generator 41) excluding the battery 43, and power is supplied from these power supplies by the optimum supply load distribution, Were considered as one total power source. The optimal supply load distribution is determined by the total power source and the battery 43, but the optimal supply load distribution may be determined by the waste heat generator 25, the generator 41, and the battery 43.

  -The number of power supplies can be set arbitrarily.

  A PTC heater may be employed instead of the heat pump system 30. In this case, it can be considered that the electric power supplied to the PTC heater is equal to the amount of heat supplied from the PTC heater, so that it is easy to calculate the heat cost and the like for the PTC heater. Further, the number of the plurality of heat sources can be arbitrarily set.

  When the electric heat source driven by electric power is not included in the plurality of heat sources, the heat supply control and the power supply control may be executed independently. Further, only one of the heat supply control and the power supply control may be executed.

  -Based on the relationship between the heat amount supplied from each heat source and the heat cost, the total heat amount supplied from a plurality of heat sources matches the required heat amount, and the heat cost of the entire heat source supplying the heat is minimized. In addition, when determining the distribution for supplying heat from each heat source, it can also be determined by brute force calculation.

  -It can also be embodied in a diesel engine by controlling the fuel injection timing instead of controlling the ignition timing.

  DESCRIPTION OF SYMBOLS 10 ... Engine, 23 ... Heater core, 25 ... Waste heat generator, 30 ... Heat pump system, 37 ... Indoor heat exchanger, 41 ... Generator, 43 ... Battery, 51 ... Energy control apparatus, 52 ... Engine control apparatus, 53 ... Electric power generation Control device 54 ... Air conditioning control device.

Claims (19)

A heat source control device that controls heat supply from a plurality of heat sources mounted on a vehicle to a heat exchange unit,
A required heat amount calculating means for calculating a required heat amount required to be supplied from the plurality of heat sources to the heat exchange unit;
For each heat source, heat cost calculating means for calculating the relationship between the amount of heat supplied and the heat cost that is the amount of fuel consumed to supply the unit heat amount;
Based on the relationship between the heat amount supplied from each heat source and the heat cost, the sum of the heat amounts supplied from the plurality of heat sources matches the required heat amount, and the heat cost of the entire heat source supplying the heat is minimized. A calorific value distribution determining means for determining a distribution for supplying heat from each heat source,
A heat source control device for a vehicle, comprising: A calorific value increment fuel amount calculating means for calculating a calorie increment fuel amount that is a differential value obtained by differentiating the function of the calorie value by the calorie value, with the fuel amount consumed to supply heat in each heat source as a function of the calorie value;
The heat amount distribution determining means distributes heat from each heat source so that the total amount of heat supplied from the plurality of heat sources matches the required heat amount, and the heat amount increment fuel amount of each heat source matches each other. The vehicle heat source control device according to claim 1, wherein: A calorific value relationship calculating means for calculating a calorific value relationship which is a relationship between the calorific value and the calorific value incremental fuel amount in each heat source;
The heat amount distribution determining means calculates a heat amount corresponding to the heat amount incremental fuel amount based on the heat amount relationship in each heat source while changing the heat amount incremental fuel amount so as to match each other in each heat source, and the heat amount of each heat source The vehicle heat source control device according to claim 2, wherein a distribution for supplying the heat amount from each heat source is determined so that the sum of the values matches the required heat amount. The heat quantity relationship calculating means sets an upper limit value of the heat quantity that can be supplied in each heat source,
The heat amount distribution determining means calculates the heat amount corresponding to the heat amount incremental fuel amount based on the heat amount relationship in each heat source while increasing the heat amount incremental fuel amount in accordance with each heat source, and the heat amount is the upper limit In the heat source that has reached the value, the amount of heat supplied is set as the upper limit value, and the distribution of supplying the heat amount from each heat source is determined so that the sum of the heat amount supplied from other heat sources and the upper limit value matches the required heat amount The vehicle heat source control device according to claim 3.   5. The vehicle heat source control device according to claim 3, wherein the heat quantity relation calculating unit calculates the heat quantity relation in each heat source in accordance with an operating state of an engine mounted on the vehicle. The plurality of heat sources include an engine heat source that supplies heat to the heat exchanging unit via cooling water of an engine mounted on the vehicle,
The engine is equipped with an electric pump that discharges the cooling water,
The vehicle according to any one of claims 1 to 5, further comprising pump control means for controlling a discharge amount of the cooling water by the electric pump based on an amount of heat supplied from the engine heat source. Heat source control device. The plurality of heat sources include an electric heat source that converts electric power into heat and supplies the heat,
The said heat cost calculation means calculates the said heat cost based on the electric power cost which is the amount of fuel consumed in order to supply unit electric power about the said electric heat source. The heat source control device for a vehicle according to claim 1. The vehicle is equipped with a plurality of power supplies,
Required power calculation means for calculating required power required to be supplied from the plurality of power supplies to an electric load including the electric heat source;
Power cost calculating means for calculating the relationship between the power supplied for each power source and the power cost;
Based on the relationship between the power supplied from each power source and the power cost, the total power supplied from the plurality of power sources matches the required power, and the power cost of the entire power source that supplies the power is minimum. Power distribution determining means for determining a distribution for supplying power from each power source,
With
The vehicle heat source control device according to claim 7, wherein the heat cost calculation unit calculates the heat cost based on the minimum power cost for the electric heat source. Power increment fuel amount calculating means for calculating a power increment fuel amount that is a differential value obtained by differentiating the function of the power with respect to the amount of fuel consumed to supply power in each power source as a function of the power;
The power distribution determining means distributes power from each power source so that a total of power supplied from the plurality of power sources matches the required power, and the power increment fuel amount of each power source matches each other. The vehicle heat source control device according to claim 8, wherein: A power relationship calculating means for calculating a power relationship that is a relationship between the power and the power increment fuel amount in each power source;
The power distribution determining means calculates the power corresponding to the power increment fuel amount based on the power relationship in each power source while changing the power increment fuel amount so as to match each other at each power source, and the power of each power source The heat source control device for a vehicle according to claim 9, wherein a distribution for supplying power from each power source is determined so that a total of the power consumption matches the required power. The power relationship calculating means sets an upper limit value of power that can be supplied in each power source,
The power distribution determining means calculates the power corresponding to the power incremental fuel amount based on the power relationship in each power source while increasing the power incremental fuel amount to match each other at each power source, and the power is the upper limit In the power supply that has reached the value, the power to be supplied is set as the upper limit value, and the distribution of power supply from each power supply is determined so that the sum of the power supplied from other power supplies and the upper limit value matches the required power The vehicle heat source control device according to claim 10. The plurality of power sources includes a battery;
The power relationship calculating means sets the power increment fuel amount with respect to power in the battery as a constant value,
The power distribution determining means calculates the power corresponding to the power increment fuel amount based on the power relationship in each power source while matching the power increment fuel amount with each power source to be the constant value. 12. The vehicle heat source control according to claim 10, wherein power supplied from the battery is determined so that a sum of power supplied and power supplied from another power source matches the required power. apparatus. The vehicle is equipped with a plurality of power supplies including a battery,
Load required power calculation means for calculating required load power to be supplied to an electric load including the electric heat source;
Charge request power calculation means for calculating charge request power required to be supplied for charging from a power source excluding the battery to the battery;
Power cost calculating means for calculating the relationship between the power supplied for each power source and the power cost;
Based on the relationship between the power supplied from each power source and the power cost, the total power supplied from the plurality of power sources excluding the battery is the total required power that is the sum of the load required power and the charge required power. Power distribution determining means for determining a distribution for supplying power from each power source except for the battery so that the power cost of the whole power source that matches and that supplies the power is minimized;
With
The vehicle heat source control device according to claim 7, wherein the heat cost calculation unit calculates the heat cost based on the minimum power cost for the electric heat source. In each power source except the battery, the amount of fuel consumed to supply power is used as a function of power, and the power increment fuel amount calculation is performed to calculate a power increment fuel amount that is a differential value obtained by differentiating the power function with respect to power. Means,
The power distribution determining means is configured such that a total of power supplied from a power source excluding the battery matches a total required power that is a sum of the load required power and the charging required power, and the power sources of the power sources excluding the battery The vehicle heat source control device according to claim 13, wherein a distribution for supplying electric power from each power source excluding the battery is determined so that the electric power increment fuel amounts coincide with each other. A power relationship calculating means for calculating a power relationship that is a relationship between the power and the power increment fuel amount in each power source;
The power distribution determining means changes the power increment fuel amount in each power source except the battery so as to coincide with each other, and changes the power corresponding to the power increment fuel amount based on the power relationship in each power source except the battery. The vehicle heat source according to claim 14, wherein the distribution of power supplied from each power source excluding the battery is determined so as to calculate and the total power of each power source matches the total required power. Control device. The power relationship calculating means sets an upper limit value of power that can be supplied in each power source,
The power distribution deciding means increases the power increment fuel amount in each power source except the battery so as to coincide with each other and increases the power corresponding to the power increment fuel amount based on the power relationship in each power source except the battery. The power to be supplied in the power source whose power reaches the upper limit value is the upper limit value, and the total of the power supplied from other power sources and the upper limit value matches the total required power. The vehicle heat source control device according to claim 15, wherein a distribution for supplying electric power from each power source excluding the battery is determined. Charging power that is the amount of fuel consumed to increase the amount of charge of the battery by a unit amount when supplying the load required power from the power sources other than the battery by the distribution and charging the battery Charging power cost calculating means for calculating the cost,
17. The vehicle heat source control device according to claim 15, wherein the required charging power calculation unit sets the maximum required power as the required charging power within a range where the charging power cost is smaller than a reference value. . Optimal power cost calculation for calculating the optimal power cost by dividing the total amount of fuel consumed by each power source excluding the battery by the total required power when power is supplied from the power sources other than the battery by the distribution. With means,
The power increment fuel amount calculating means is a fuel amount consumed to supply power in a total power source that is regarded as one power source by summing the power sources excluding the battery based on the power and the optimum power cost. As a function of power, a power increment fuel amount that is a differential value obtained by differentiating the power function with power,
The power relationship calculating means calculates a power relationship that is a relationship between power and the power incremental fuel amount in the total power source, and sets the power incremental fuel amount with respect to power in the battery as a constant value.
The power distribution determination means calculates power corresponding to the power increment fuel amount based on the power relationship in the total power source while setting the power increment fuel amount to the constant value when the charge request power is zero. The power supplied from the battery is determined so that the sum of the power supplied from the battery and the power supplied from the total power supply matches the total required power. The vehicle heat source control device described.   The power relation calculation means calculates the power relation in each power source according to an operating state of an engine mounted on the vehicle. The vehicle heat source control device described.

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