JP2002303197A - Internal combustion engine with heat storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent exhaust emission immediately after the start of an internal combustion engine from being deteriorated by supplying heat to the internal combustion engine for long period even when the internal combustion engine is stopped. SOLUTION: This internal combustion engine comprises a circulating system C for circulating heat medium, a heat supply means 23 for supplying heat to the internal combustion engine 1 through the heat medium, and a re-supply effect judgment means 22 for judging the effect of supply of heat based on the temperature of the heat medium inside the heat storage device 10 and the internal combustion engine 1. The re-supply effect judgment means 22 repeatedly judges the effect of heat supply. When the means judges to be effective, heat is supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an internal combustion engine provided with a heat storage device.

[0002]

2. Description of the Related Art Generally, when an internal combustion engine is operated in a state where the temperature around a combustion chamber has not reached a predetermined temperature, deterioration of atomization of fuel supplied to the combustion chamber and extinction of flame near a wall surface occur. This will cause exhaust emissions to deteriorate.

[0003] Therefore, an internal combustion engine having a heat storage device for storing heat generated during operation of the internal combustion engine and supplying the stored heat to the internal combustion engine when the engine is stopped or when the engine is started to raise the temperature of the internal combustion engine. Institutions are known. However, since the amount of heat stored in the heat storage device is limited, a technique for efficiently using the limited amount of heat has been disclosed.

For example, in Japanese Patent Application Laid-Open No. 6-185359, a first cooling water passage for introducing cooling water into a cylinder block, cooling water is introduced into a cylinder head independently of the cylinder block, and a heat storage device is provided. And a second cooling water passage connected thereto.

[0005] In the heat storage device of the internal combustion engine configured as described above, when the internal combustion engine is cold, heat released from the heat storage device is intensively introduced into the cylinder head through the second cooling water passage. In this way, by intensively introducing the heat stored in the heat storage device to the cylinder head, it is possible to use limited heat effectively. As a result, the emission performance and the fuel efficiency are improved.

[0006]

However, in order to improve the emission performance and the fuel efficiency immediately after starting the internal combustion engine, heat must be supplied to the internal combustion engine before the internal combustion engine is started. It is necessary that the temperature has reached a predetermined temperature or more when the engine is started. However, since the timing of starting the internal combustion engine differs depending on the situation, if the time until the internal combustion engine starts after the heat storage device supplies heat to the internal combustion engine becomes longer, the heat supplied to the internal combustion engine becomes And the temperature of the internal combustion engine gradually decreases. In addition, since a small amount of heat flows out of the heat storage device to the outside, if the internal combustion engine is not operated for a long time, the amount of heat stored in the heat storage device decreases, and it is difficult to raise the internal combustion engine to a predetermined temperature. May be caused.

The present invention has been made to solve the above problems, and provides an internal combustion engine provided with a heat storage device capable of supplying heat to the internal combustion engine for a long period of time even when the internal combustion engine is stopped. Accordingly, it is an object of the present invention to prevent deterioration of exhaust emission immediately after starting the internal combustion engine.

[0008]

Means for Solving the Problems To achieve the above object, an internal combustion engine provided with a heat storage device of the present invention employs the following means. That is, an internal combustion engine provided with a heat storage device that stores heat, wherein the heat stored by the heat storage device is supplied to the internal combustion engine via a circulation system that circulates a heat medium and a heat medium that circulates through the circulation system. Heat supply means, heat medium temperature measurement means for measuring at least one of the temperature of the heat medium inside the heat storage device or the temperature of the heat medium inside the internal combustion engine, and an effect when heat is supplied by the heat supply means Re-supply effect determining means for determining the effect of the heat supply based on the measurement result of the heat medium temperature measuring means. When it is determined that there is, heat is supplied by the heat supply means.

In the internal combustion engine provided with the heat storage device configured as described above, heat generated during operation of the internal combustion engine is stored by the heat storage device even after the operation of the internal combustion engine is stopped.
The heat stored by this heat storage device circulates through a circulation system via a heat medium. Then, the circulating heat medium supplies heat to the internal combustion engine.

In this manner, the heat storage device loses heat by supplying heat to the internal combustion engine, and the internal combustion engine is supplied with heat, so that the temperature of the internal combustion engine can be increased even before the engine is started. .

[0011] The heat medium temperature measuring means measures at least one of the temperature of the heat medium inside the heat storage device and the temperature of the heat medium inside the internal combustion engine. When heat is not being supplied, the temperature in the heat storage device is substantially constant. on the other hand,
When heat is supplied, the temperature in the heat storage device that has lost heat decreases.

The re-supply effect determining means determines whether or not there is an effect of heat supply when the heat is supplied to the internal combustion engine based on the measurement result of the heat medium temperature measuring means.

When the heat is continuously supplied to the internal combustion engine, the temperature of the internal combustion engine becomes substantially equal to the temperature of the heat medium, and the temperature does not rise above that temperature. In such a case, even if heat is supplied, the effect is small. On the other hand, when the supply of heat is stopped, the temperature of the internal combustion engine decreases until the internal combustion engine is started, but the temperature inside the heat storage device does not decrease and maintains a substantially constant temperature. If such a state continues, the deviation between the temperature of the heat medium in the heat storage device and the temperature of the heat medium in the internal combustion engine gradually increases. If the heat supply is performed again when the deviation increases, the temperature of the internal combustion engine can be increased again. As described above, when heat is stored in the heat storage device, the temperature of the internal combustion engine can be increased even if heat is repeatedly supplied.

Therefore, when heat is supplied based on the determination result of the re-supply effect determination means, heat can be supplied to the internal combustion engine as long as the effect of the heat supply is obtained, and the internal combustion engine is heated for a long period of time. can do.

In the present invention, the heat medium temperature measuring means measures the temperature of the heat medium inside the heat storage device and the temperature of the heat medium inside the internal combustion engine. The heat supply to the internal combustion engine may be performed only when the temperature is lower than the temperature of the heat medium in the heat storage device.

When the temperature in the internal combustion engine is higher than the temperature in the heat storage device, the heat is not supplied from the heat storage device to the internal combustion engine, but is supplied from the internal combustion engine to the heat storage device. In such a case, if heat is not supplied, the temperature of the internal combustion engine can be prevented from lowering. On the other hand, if heat is supplied to the internal combustion engine when the temperature in the internal combustion engine is lower than the temperature in the heat storage device, the temperature of the internal combustion engine can be increased.

In the present invention, the heat medium temperature measuring means measures the temperature of the heat medium in the heat storage device and the temperature of the heat medium in the internal combustion engine, and determines the temperature of the heat medium in the heat storage device and the temperature of the heat medium. Heat may be supplied to the internal combustion engine only when the deviation from the temperature of the heat medium in the internal combustion engine is equal to or greater than a predetermined value.

When the difference between the temperature in the heat storage device and the temperature in the internal combustion engine is smaller than a predetermined value, the effect of supplying heat is small. However, when the heat is not supplied to the internal combustion engine, the temperature in the heat storage device becomes substantially constant, but the temperature of the internal combustion engine gradually decreases. As the time until the start of the internal combustion engine increases, the deviation between the temperature in the heat storage device and the temperature in the internal combustion engine gradually increases. Therefore, if heat is supplied to the internal combustion engine when the deviation increases, heat can be supplied to the internal combustion engine only when the effect of heat supply is large.

In the present invention, the heat medium temperature measuring means measures at least the temperature of the heat medium in the internal combustion engine, and supplies the heat to the internal combustion engine only when the temperature in the internal combustion engine is lower than a predetermined temperature. The supply may be performed.

When the temperature inside the internal combustion engine is higher than a predetermined temperature, the effect of supplying heat is small. However, in a state where heat is not supplied to the internal combustion engine, the temperature of the internal combustion engine gradually decreases. Supply heat. Thus, heat supply is performed only when the effect of heat supply is large.

In the present invention, the heat storage device may include a heating means for increasing the temperature of the heat medium.

When heat is supplied via the heat medium, the heat stored in the heat storage device decreases. Then, when the heat stored in the heat storage device falls below a predetermined amount, even if heat is supplied to the internal combustion engine, the temperature of the internal combustion engine cannot be raised to the predetermined temperature, and emission performance and the like deteriorate. There is a fear. Further, when the internal combustion engine is not operated for a long period of time and is left, heat gradually flows out of the heat storage device, and the stored heat decreases. In such a case,
When the heating means heats the heat medium, the heat storage device is supplied with the lost heat, and the temperature of the internal combustion engine can be raised again to a predetermined temperature.

In the present invention, the heating means can start heating when the heat supply means stops circulation of the heat medium.

With this arrangement, the heat lost to the internal combustion engine can be immediately replenished, and the next heat supply can be promptly dealt with. Further, since the time for heating can be extended, the heat medium can be sufficiently heated.

In the present invention, the heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the heating means measures the temperature of the heat medium in the heat storage device at a predetermined temperature or lower. Heating can be started.

Here, when the temperature in the heat storage device is high, there is no need to heat. Therefore, heating is performed only when the temperature in the heat storage device decreases and the need for heating occurs, thereby reducing power consumption.

In the present invention, the heat medium temperature measuring means measures at least the temperature of the heat medium in the internal combustion engine, and the heating means measures when the temperature of the heat medium in the internal combustion engine is lower than a predetermined temperature. Heating can be started.

That is, when the temperature inside the internal combustion engine is higher than a predetermined temperature, there is no need to supply heat, and there is no need to heat the heat medium. Therefore, heating is started when the temperature falls below the predetermined temperature. If this is the case, power consumption can be reduced.

In the present invention, the heat medium temperature measuring means measures at least one temperature of the heat medium inside the heat storage device or at least one temperature of the heat medium inside the internal combustion engine. When the means stops circulation of the heat medium, based on at least one of the temperature of the heat medium in the heat storage device and the temperature of the heat medium in the internal combustion engine,
It is possible to determine when to start heating.

When heat is supplied by the heat supply means, the heat stored in the heat storage device is consumed each time, and the amount of heat decreases. Then, the temperature of the heat medium decreases. A timing for starting the heating of the heat medium is determined based on the temperature at the time of the decrease.

In the present invention, the heating means may include a heater which is supplied with electric power and whose temperature rises, and a supply power control means for controlling an amount of electric power supplied to the heater.

In the internal combustion engine mounted on a vehicle, it is preferable to use an electric heater for obtaining electric power from a storage battery mounted on the vehicle as the heating means.

In the present invention, the heating means may include a plurality of heaters each of which is supplied with electric power and whose temperature rises, and a plurality of supply power control means for controlling the amount of electric power supplied to the heater.

When a plurality of heaters are used simultaneously when the temperature in the heat storage device is low, the temperature in the heat storage device can be increased earlier than when a single heater is used. Further, after the temperature in the heat storage device rises, if a single heater is used to keep the temperature, power consumption can be reduced as compared with the case where a plurality of heaters are used.

In the present invention, the heating means includes a plurality of heaters each of which is supplied with electric power and whose temperature rises, and a plurality of supply power control means for controlling the amount of electric power supplied to the heaters. Can be set to be different.

The heating means having such a configuration can use heaters having different outputs depending on the situation.

In the present invention, the heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the heating means operates until the temperature of the heat medium in the heat storage device reaches a predetermined temperature. Performs heating at a first predetermined output, and after reaching a predetermined temperature, can perform heating at a second predetermined output smaller than the first predetermined output.

In this way, when it becomes necessary to raise the temperature inside the heat storage device, the heating can be performed early with a large electric power, and after reaching the predetermined temperature, the heat can be kept with a small electric power.

In the present invention, the heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the power supply control means outputs an output based on the temperature of the heat medium in the heat storage device. Control can be performed.

Further, in order to achieve the above object, an internal combustion engine provided with a heat storage device of the present invention employs the following means.
That is, an internal combustion engine provided with a heat storage device that stores heat, wherein the heat stored by the heat storage device is supplied to the internal combustion engine via a circulation system that circulates a heat medium and a heat medium that circulates through the circulation system. Heat supply means, a heat storage device temperature measurement means for measuring the temperature of the heat medium inside the heat storage device, an internal combustion engine temperature measurement means for measuring the temperature of the heat medium inside the internal combustion engine, and heat generated by the internal combustion engine. Re-supply effect determining means for determining an effect when the temperature is supplied based on the measurement results of the heat storage device temperature measuring means and the internal combustion engine temperature measuring means. Then, the effect of the heat supply is determined, and when it is determined that the effect is obtained when the heat supply is performed, the heat is supplied by the heat supply unit.

In the internal combustion engine provided with the heat storage device configured as described above, heat generated during operation of the internal combustion engine is stored by the heat storage device even after the operation of the internal combustion engine is stopped.
The heat stored by this heat storage device circulates through a circulation system via a heat medium. Then, the circulating heat medium supplies heat to the internal combustion engine.

As described above, the heat storage device loses heat by supplying heat to the internal combustion engine, and the internal combustion engine is supplied with heat, so that the temperature of the internal combustion engine can be increased even before the engine is started. .

The temperature measuring means in the heat storage device measures the temperature of the heat medium in the heat storage device. When heat is not being supplied, the temperature in the heat storage device is substantially constant. On the other hand, when heat is supplied, the temperature in the heat storage device that has lost heat decreases.

The internal combustion engine temperature measuring means measures the temperature of the heat medium inside the internal combustion engine.

The re-supply effect judging means has an effect of heat supply when heat is supplied to the internal combustion engine based on the measurement results of the temperature measuring means in the heat storage device and the temperature measuring means in the internal combustion engine. It is determined whether or not. When heat is supplied based on the determination result of the re-supply effect determination unit, heat can be supplied to the internal combustion engine as long as the effect of heat supply is obtained,
The temperature of the internal combustion engine can be increased over a long period of time.

In the present invention, heat is supplied to the internal combustion engine when the temperature measured by the internal combustion engine temperature measuring means is lower than the temperature measured by the heat storage device temperature measuring means. It may be.

In the present invention, heat is supplied to the internal combustion engine when the difference between the temperatures measured by the temperature measuring means in the heat storage device and the temperature measuring means in the internal combustion engine is equal to or larger than a predetermined value. You may.

In the present invention, when the temperature measured by the internal combustion engine temperature measuring means is equal to or lower than a predetermined temperature,
Heat may be supplied to the internal combustion engine.

[0049] In the present invention, the heat storage device may include heating means for raising the temperature of the heat medium.

In the present invention, the heating means can start heating when the heat supply means stops circulation of the heat medium.

In the present invention, the heating means can start heating when the temperature measured by the temperature measuring means in the heat storage device is equal to or lower than a predetermined temperature.

In the present invention, the heating means can start heating when the temperature measured by the internal combustion engine temperature measuring means is equal to or lower than a predetermined temperature.

In the present invention, the heating means is measured by at least one of the temperature measuring means in the heat storage device and the temperature measuring means in the internal combustion engine when the heat supply means stops circulation of the heat medium. Based on the temperature, it is possible to determine when to start heating.

In the present invention, the heating means may include a heater which is supplied with electric power and whose temperature rises, and a supply power control means for controlling an amount of electric power supplied to the heater.

In the present invention, the heating means may include a plurality of heaters each of which is supplied with electric power and whose temperature rises, and a supply power control means for controlling the amount of electric power supplied to the heater.

In the present invention, the heating means includes a plurality of heaters each of which is supplied with electric power and whose temperature rises, and a plurality of supply power control means for controlling the amount of electric power supplied to the heaters. Can be set to be different.

In the present invention, the heating means performs heating at a first predetermined output until the temperature measured by the temperature measuring means in the heat storage device reaches the predetermined temperature, and after the temperature reaches the predetermined temperature, , A second output smaller than the first predetermined output.
Can be heated at a predetermined output.

In the present invention, the supply power control means can perform output control based on the temperature measured by the temperature measurement means in the heat storage device.

[0059]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of a heat storage device for an internal combustion engine according to the present invention will be described below with reference to the drawings. Here, a case where the heat storage device for an internal combustion engine according to the present invention is applied to a direct injection gasoline engine for driving a vehicle will be described as an example. <First Embodiment> FIG. 1 schematically shows an engine 1 to which a heat storage device of an internal combustion engine according to the present invention is applied, and cooling water passages (circulation passages) A, B, and C through which cooling water circulates. It is a block diagram.

The engine 1 shown in FIG. 1 is a water-cooled four-cycle gasoline engine having four cylinders 2.

The outer shell of the engine 1 includes a cylinder head 1
a, a cylinder block 1b connected to a lower portion of the cylinder head 1a, and an oil pan 1c connected to a lower portion of the cylinder block 1b.

The engine 1 has a fuel injection valve 5 for injecting fuel into the combustion chamber of each cylinder 2.

A piston 3 is inserted into the cylinder 2. One end of a connecting rod 4 is connected to the piston 3, and the other end of the connecting rod 4 is connected to a crankshaft (not shown).

The cylinder head 1a and the cylinder block 1b are provided with a water jacket 23 which is a passage for circulating cooling water. At the inlet of the water jacket 23, a water pump 6 for sucking cooling water from outside the engine 1 and discharging the cooling water into the engine 1 is provided. The water pump 6 is a pump that operates using the rotation torque of the output shaft of the engine 1 as a drive source. That is, the water pump 6 operates only when the engine 1 is operating. Further, the engine 1 is provided with an in-engine cooling water temperature sensor 29 for transmitting a signal corresponding to the temperature of the cooling water in the water jacket 23.

The passage for circulating the cooling water through the engine 1 is divided into a circulation passage A for circulating the radiator 9, a circulation passage B for circulating the heater core 13, and a circulation passage C for circulating the heat storage device 10. Some of the circulation passages have portions shared with other circulation passages.

The circulation passage A mainly has a function of lowering the temperature of the cooling water by releasing the heat of the cooling water from the radiator 9.

The circulation passage A is a radiator inlet side passage A.
1, a radiator outlet side passage A2, a radiator 9, and a water jacket 23. Cylinder head 1
a is connected to one end of a radiator inlet side passage A1;
The other end of the radiator entrance side passage A1 is connected to the entrance of the radiator 9. A shutoff valve 31 that opens and closes in response to a signal from the ECU 22 is provided in the middle of the radiator inlet side passage A1.

One end of a radiator outlet side passage A2 is connected to the outlet of the radiator 9, and the radiator outlet side passage A2
The other end of 2 is connected to the cylinder block 1b. A thermostat 8 is provided on the radiator outlet side passage A2 from the outlet of the radiator 9 to the cylinder block 1b when the temperature of the cooling water reaches a predetermined temperature.
Also, the radiator outlet side passage A2 and the cylinder block 1
A water pump 6 is interposed at the connection portion with b.

The circulation passage B mainly has a function of increasing the ambient temperature in the vehicle cabin by releasing the heat of the cooling water from the heater core 13.

The circulation passage B is provided on the heater core entrance side passage B.
1, a heater core outlet side passage B2, and a heater core 13. One end of the heater core inlet side passage B1 is connected to a point in the radiator inlet side passage A1. The passage from the cylinder head 1a to this connection portion is shared with the radiator inlet side passage A1. Also, the heater core inlet side passage B
The other end of 1 is connected to the entrance of the heater core 13. One end of the heater core outlet side passage B2 is connected to the outlet of the heater core 13, and the other end of the heater core outlet side passage B2 is connected between the thermostat 8 and the water pump 6 in the middle of the radiator outlet side passage A2. . The passage from this connection to the cylinder block 1b is shared with the radiator outlet side passage A2. Furthermore, water jacket 2
3 is also shared.

The circulation passage C mainly stores the heat of the cooling water,
Further, it has a function of discharging the stored heat to warm the engine 1.

The circulation passage C includes a heat storage device inlet-side passage C1,
It comprises a heat storage device outlet side passage C2 and a heat storage device 10. One end of the heat storage device inlet-side passage C1 is connected to the middle of the radiator inlet-side passage A1. The passage from the cylinder head 1a to this connection is shared with the circulation passages A and B. The other end of the heat storage device entrance-side passage C <b> 1 is connected to the inlet of the heat storage device 10. At the outlet of the heat storage device 10,
One end of the heat storage device outlet-side passage C2 is connected, and the other end of the heat storage device outlet-side passage C2 is connected to the cylinder head 1a. Inside the engine 1, the circulation passages A and B and the water jacket 23 are partially shared. In addition, heat storage device 1
A check valve 11 for allowing cooling water to flow only in the direction of the arrow in FIG. Inside the heat storage device 10, a cooling water temperature sensor 28 in the heat storage device that transmits a signal according to the temperature of the cooling water stored in the heat storage device is provided. Further, the heat storage device inlet side passage C
An electric water pump 12 is interposed in the middle of 1 and upstream of the check valve 11.

In the circulation passage thus configured, in the circulation passage A, when the rotation torque of a crankshaft (not shown) is transmitted to the input shaft of the water pump 6 while the engine 1 is operating, the water pump 6 Discharges cooling water at a pressure corresponding to the rotational torque transmitted from a crankshaft (not shown) to the input shaft of the water pump 6. That is, since the water pump 6 is stopped while the engine 1 is stopped, the cooling water does not circulate in the circulation passage A.

The cooling water discharged from the water pump 6 flows through the water jacket 23. At this time, heat is transferred between the cooling water and the cylinder head 1a and the cylinder block 1b. Part of the heat generated by the combustion in the cylinder 2 is transmitted to the wall surface of the cylinder 2 and is further transferred to the cylinder head 1a and the cylinder block 1b.
, The temperature of the entire cylinder head 1a and the cylinder block 1b rises. Part of the heat transmitted to the cylinder head 1a and the cylinder block 1b is transmitted to the cooling water inside the water jacket 23, and raises the temperature of the cooling water. Further, the temperatures of the cylinder head 1a and the cylinder block 1b that have lost the heat decrease.
Thus, the cooling water whose temperature has increased flows out of the cylinder block 1b to the radiator inlet side passage A1.

The cooling water that has flowed into the radiator inlet side passage A1 flows through the radiator inlet side passage A1 and shuts off.
Reach 1 The shutoff valve 31 is opened during operation of the engine 1 and closed when the engine 1 is stopped, based on a signal from the ECU 22. During operation of the engine 1, the cooling water flows through the radiator inlet side passage A <b> 1 after passing through the shutoff valve 31 and then flows into the radiator 9. In the radiator 9, heat is transferred between the outside air and the cooling water. Part of the heat of the cooling water having a higher temperature is transmitted to the wall surface of the radiator 9 and further transmitted inside the radiator 9 to increase the temperature of the entire radiator 9. Part of the heat transmitted to the radiator 9 is transmitted to the outside air and raises the temperature of the outside air. In addition, the temperature of the cooling water that has lost the heat decreases accordingly.
The cooling water whose temperature has decreased flows out of the radiator 9.

The cooling water flowing out of the radiator 9 flows through the radiator outlet side passage A2 and reaches the thermostat. Here, when the temperature of the cooling water flowing through the heater core outlet side passage B2 reaches a predetermined temperature, the thermostat 8 automatically opens due to thermal expansion of the wax. That is, if the temperature of the cooling water flowing through the heater core outlet side passage B2 has not reached the predetermined temperature, the radiator outlet side passage A2 is shut off and the cooling water does not flow.

When the thermostat 8 is open, the cooling water that has passed through the thermostat 8 flows into the water pump 6.

In this way, the cooling water whose temperature has been lowered by the radiator 9 is again discharged from the water pump 6 to the water jacket 23, and the temperature rises.

On the other hand, part of the cooling water flowing through the radiator inlet side passage A1 flows into the heater core inlet side passage B1. The cooling water flowing into the heater core inlet side passage B1 flows through the heater core inlet side passage B1 and
Reach 3 The heater core 13 exchanges heat with air in the vehicle interior, and the air heated by the movement of the heat is circulated in the vehicle interior by a blower (not shown), and the ambient temperature of the vehicle interior rises. After that, the cooling water flows out of the heater core 13,
It flows through the heater core outlet side passage B2 and reaches the radiator outlet side passage A2. At this time, when the thermostat 8 is open, it joins the cooling water flowing through the circulation passage A and flows into the water pump 6. On the other hand, when the thermostat 8 is closed, only the cooling water flowing through the circulation passage B flows into the water pump 6.

The cooling water whose temperature has been lowered by the heater 13 is discharged from the water pump 6 to the water jacket 23 again.

A part of the cooling water flowing through the radiator inlet side passage A1 flows into the heat storage device inlet side passage C1. The cooling water flowing into the heat storage device inlet-side passage C1 flows through the heat storage device inlet-side passage C1 and reaches the electric water pump 12. The electric water pump 12 is connected to the ECU 2
The cooling water is discharged at a predetermined pressure by operating in response to a signal from 2.

When the electric water pump 12 is operating, the cooling water is discharged at a predetermined pressure, flows through the heat storage device inlet side passage C1, passes through the check valve 11, and
Reach 0.

In the heat storage device 10, a vacuum heat insulating space is provided between the outer container 10a and the inner container 10b, and the cooling water flowing from the cooling water injection pipe 10c is supplied to the cooling water discharge pipe 10d.
Spill out of. The cooling water flowing into the heat storage device 10 is kept insulated from the outside and kept warm. The cooling water flowing out of the heat storage device 10 passes through the check valve 11, flows through the heat storage device outlet side passage C2, and flows into the cylinder head 1a.

The engine 1 configured as described above is provided with an electronic control unit (ECU) 22 for controlling the engine 1. The ECU 22 controls the operating state of the engine 1 according to the operating conditions of the engine 1 and a request from the driver,
Further, this unit is a unit that performs a temperature rise control of the engine 1 (engine preheat control) while the operation of the engine 1 is stopped.

Various sensors such as a crank position sensor 27, a cooling water temperature sensor 28 in a heat storage device, and a cooling water temperature sensor 29 in an engine are connected to the ECU 22 via electric wiring.
2 is input.

The ECU 22 controls the fuel injection valve 5, the electric water pump 12, the shutoff valve 31 and the like so that the fuel injection valve 5, the electric water pump 12, and the like can be controlled.
It is connected to the shutoff valve 31 and the like via electric wiring.

Here, as shown in FIG.
Are CPs interconnected by a bidirectional bus 350
A U351, a ROM 352, a RAM 353, a backup RAM 354, an input port 356, and an output port 357 are provided, and an A / D converter (A / D) 355 connected to the input port 356 is provided.

The input port 356 receives the output signals of a sensor that outputs a digital signal, such as the crank position sensor 27, and converts those output signals to C.
The data is transmitted to the PU 351 and the RAM 353.

The input port 356 is connected to the coolant temperature sensor 28 in the heat storage device, the coolant temperature sensor 29 in the engine,
Like the battery 30 or the like, the input is performed via an A / D 355 of a sensor that outputs a signal in an analog signal format, and the output signal is transmitted to the CPU 351 or the RAM 353.

The output port 357 is connected to the fuel injection valve 5,
The control signal output from the CPU 351 is connected to the electric water pump 12, the shut-off valve 31, and the like via electric wiring, and receives the control signal output from the CPU 351.
Transmit to the shutoff valve 31 and the like.

The ROM 352 stores a fuel injection control routine for controlling the fuel injection valve 5, an electric water pump control routine for controlling the electric water pump 12, a shutoff valve control routine for controlling the shutoff valve 31, and the like. Stores application programs.

The ROM 352 stores various control maps in addition to the application programs described above. The control map includes, for example, a fuel injection amount control map indicating a relationship between an operating state of the engine 1 and a basic fuel injection amount (basic fuel injection time), and a fuel indicating a relationship between an operating state of the engine 1 and a basic fuel injection timing. An injection timing control map and the like.

The RAM 353 stores an output signal from each sensor, a calculation result of the CPU 351 and the like. The calculation result is, for example, an engine speed calculated based on a time interval at which the crank position sensor 27 outputs a pulse signal. These data are rewritten to the latest data every time the crank position sensor 27 outputs a pulse signal.

The backup RAM 354 is a nonvolatile memory capable of storing data even after the operation of the engine 1 is stopped.

Next, an outline of the temperature rise control of the engine 1 according to the present embodiment (hereinafter, referred to as “engine preheat control”) will be described.

When the ECU 22 sends a signal to the electric water pump 12 during operation of the engine 1 to operate the electric water pump 12, the cooling water circulates in the circulation passage C. Then, the cooling water heated by the engine 1 flows inside the heat storage device 10, and the inside of the heat storage device 10 is filled with the high-temperature cooling water. Then, if the ECU 22 stops the operation of the electric water pump 12 after the engine 1 is stopped, high-temperature cooling water can be stored in the heat storage device 10. The stored cooling water is prevented from lowering in temperature due to the heat retaining effect of the heat storage device 10.

The ECU 22 circulates the high-temperature cooling water stored in the heat storage device 10 to the cylinder head 1a while the engine 1 is stopped, and controls the temperature of the cylinder head 1a. Here, when the engine 1 is stopped, the water pump 6 is also stopped. Therefore, while the engine 1 is stopped, the electric water pump 12 is operated to circulate the cooling water.

The electric water pump 12 operates based on a signal from the ECU 22, and discharges cooling water at a predetermined pressure. The discharged cooling water flows through the heat storage device inlet side passage C1, passes through the check valve 11, and reaches the heat storage device 10. At this time, the cooling water flowing into the heat storage device 10 is cooling water whose temperature has been reduced while the engine 1 is stopped.

The cooling water stored in the heat storage device 10 flows out of the heat storage device 10 through the cooling water discharge pipe 10d. At this time, the cooling water flowing out of the heat storage device 10 is
High-temperature cooling water that flows into the heat storage device 10 during operation of the engine 1 and is kept warm by the heat storage device 10. The cooling water flowing out of the heat storage device 10 passes through the check valve 11, flows through the heat storage device outlet side passage C2, and flows into the cylinder head 1a.

The cooling water flowing into the cylinder head 1a is:
The water jacket 23 is distributed. In the water jacket 23, heat exchange is performed between the cylinder head 1a and the cooling water. Part of the heat of the cooling water is transmitted inside the cylinder head 1a, and the temperature of the entire cylinder head 1a rises. In addition, the temperature of the cooling water that has lost the heat decreases accordingly.

The cooling water whose temperature has been lowered in this way flows out of the cylinder block 1b, flows through the heat storage device inlet side passage C1, and reaches the electric water pump 12.

Here, while the engine 1 is stopped, the ECU
Since the shutoff valve 31 is closed by the signal from 22, the cooling water does not circulate through the heater core 13 and the radiator 9. Therefore, the heater core 13 and the radiator 9
The temperature of the cooling water does not unnecessarily decrease due to the transfer of heat in.

As described above, the ECU 22 operates the electric water pump 12 before starting the engine 1 to increase the temperature of the cylinder head 1a (engine preheat control).

By the way, in the system applied in the present embodiment, that is, in the system in which the heat exchange between the two members 1 and 10 is performed by the cooling water circulating between the engine 1 and the heat storage device 10,
Cooling water (hot water) stored in the heat storage device 10 is supplied to the engine 1, while cooling water in the engine 1 flows into the heat storage device 10. Therefore, while the temperature of the cooling water in the engine 1 gradually increases, the temperature of the cooling water in the heat storage device 10 gradually decreases. As the temperature difference between the cooling water in the engine 1 and the cooling water in the heat storage device 10 decreases, the effect of increasing the temperature of the engine 1 due to the heat supply from the heat storage device 10 decreases.

Therefore, in the present embodiment, when the temperature difference between the cooling water in engine 1 and the cooling water in heat storage device 10 is reduced to some extent, the effect of increasing the temperature of engine 1 by heat supply is sufficiently obtained. Judging that it is no longer possible, interrupt the heat supply. When the heat supply is interrupted, the temperature of the cooling water remaining in the heat storage device 10 is maintained substantially constant by the heat retaining effect of the heat storage device 10, but the cooling water introduced into the engine 1 The heat is continuously taken away. As a result, the temperature difference between the two members 1 and 10 increases again. When the temperature difference between the two members 1 and 10 becomes large to some extent, the ECU 22 sends the
Resume heat supply to By repeatedly applying such an aspect, if heat is intermittently supplied from the heat storage device 10 to the engine 1, the heat retaining function of the heat storage device 10 will be efficiently used.

Next, a control flow when such engine preheating control is performed will be described.

FIG. 3 is a flowchart showing a flow of the engine preheating control.

In step S101, when a trigger signal is input to the ECU 22, the ECU 22 is activated to start the present control.

The trigger signal serving as the control execution start condition includes, for example, a door opening / closing signal of a driver's seat side transmitted by a door opening / closing sensor (not shown). Before the vehicle driver starts the engine 1 mounted on the vehicle, an operation of opening the door of the vehicle and getting on the vehicle naturally occurs. Therefore,
If it is detected that the vehicle door has been opened, the ECU 2
When the vehicle driver starts the engine 1, the engine 1 is kept warm when the engine 2 is started.

In step S102, it is determined whether or not the execution condition of the engine preheat control is satisfied.

The element used for the determination is the output signal of the engine coolant temperature sensor 29. CPU 35 based on the output signal of engine internal coolant temperature sensor 29
1 calculates the cooling water temperature Tw in the water jacket 23, and determines whether the calculated temperature is lower than a predetermined temperature (for example, 45 ° C.).

When it is determined that the calculated temperature is lower than the predetermined temperature, the process proceeds to step S103 to circulate the cooling water to the engine 1.

If a negative determination is made in step S102, the flow proceeds to step S108 without circulating the cooling water.
Proceed to.

Here, when the temperature inside the water jacket 23 is higher than a predetermined temperature (for example, 45 ° C.), the effect of circulating the cooling water is small, and in order to reduce the power consumption, the engine 1 Temperature rise is not performed. The electric power for driving the electric water pump 12 is supplied from a battery 30 mounted on the vehicle. However, since this electric power is limited, it is important to reduce the electric power consumption in this way.

At step S103, the CPU 351 determines
The CPU accesses the RAM 353 and reads the output signal of the cooling water temperature sensor 28 in the heat storage device.

At step S104, the CPU 351
Based on the output signal of the cooling water temperature sensor 28 in the heat storage device read in step S103, the electric water pump 1
Determine the time to activate 2.

The output signal of the cooling water temperature sensor 28 in the heat storage device and the time for operating the electric water pump 12 are mapped in advance and stored in the ROM 352. CP
U351 is the read cooling water temperature sensor 2 in the heat storage device.
8 is calculated based on the output signal of FIG. 8 and the map, and the calculation result is represented by R
It is stored in the AM 353.

At step S105, the CPU 351 determines
Electric power is supplied to the electric water pump 12 to operate the electric water pump 12.

At step S106, the CPU 351 determines
It is determined whether the time calculated in step S104 has elapsed since the electric water pump 12 started operating in step S105. The CPU 351 accesses the RAM 353 and reads out the time elapsed since the operation of the electric water pump 12 started. This time step S1
If the time is longer than the time calculated in step S04, step S
Proceed to 107. When a negative determination is made, the process proceeds to step S105, and the electric water pump 12 is continuously operated.

At step S107, the CPU 351
The operation of the electric water pump 12 is stopped.

In step S108, the CPU 351
It is determined whether the engine 1 has been started. CPU35
1 can determine whether the engine 1 has been started by accessing the RAM 353 and determining whether the output signal of the crank position sensor 27 has been updated. CPU when engine 1 is running
When the determination at 351 is made, the process proceeds to step S109.
On the other hand, if a negative determination is made, step S105
Since the temperature of the engine 1 whose temperature has been raised in step S1 may decrease and it may be necessary to raise the temperature again, the process proceeds to step S110.

In the step S109, the CPU 351
The operation of the electric water pump 12 is stopped.

After step S109, the CPU 351
Starts the start control of the engine 1 (step S11).
9) Terminate this routine.

In step S110, the CPU 351 sets
It is determined whether the voltage of the battery 30 is higher than a predetermined voltage (for example, 12 V). If it is determined that the voltage is higher than the predetermined voltage, the process proceeds to step S111. If a negative determination is made, when the electric water pump 12 is operated, the voltage of the battery 30 is further reduced, making it difficult to start the engine 1. Therefore, the process proceeds to step S118 to end the engine preheat control.

In step S111, the CPU 351
The CPU accesses the RAM 353 and reads output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine.

In step S112, it is determined whether an execution condition for raising the temperature of engine 1 again is satisfied. The elements used for the determination here are the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine.
Is the output signal. The CPU 351 calculates the cooling water temperature in the water jacket 23 based on the output signal of the engine cooling water temperature sensor 29, and determines whether the calculated temperature is lower than a predetermined temperature (for example, 30 ° C.) ( Execution condition 1). In addition, based on the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine, the CPU 351 determines whether the cooling water temperature in the heat storage device 10 is higher than the cooling water temperature in the water jacket 23. Is determined (execution condition 2). Only when it is determined that both of these two conditions are satisfied, the process proceeds to step S113 to increase the temperature of the engine 1. On the other hand, when it is determined that any one of the above two conditions is not satisfied, the process proceeds to step S108 without circulating the cooling water.

If it is determined that any one of the determination conditions in step S112 is not satisfied,
Even if cooling water is circulated, the effect is small. In addition, heat storage device 1
If the electric water pump 12 is operated when the temperature of the cooling water inside the water jacket 23 is lower than the temperature of the cooling water inside the water jacket 23, the temperature of the cooling water inside the water jacket 23 decreases, and thus the temperature of the engine 1 decreases. I will. Therefore, in such a state, the electric water pump 1
2 shall not be activated.

In the step S113, the CPU 351
Electric power is supplied to the electric water pump 12 to operate the electric water pump 12 (engine preheating is performed).

In step S114, step S108
The same determination as that described above is performed. In step S115, it is determined whether the temperature of the cooling water in the water jacket 23 is lower than the temperature of the cooling water in the heat storage device 10. The elements used for the determination here are the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine.
Based on output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine, the CPU 351
The temperature of the cooling water in the heat storage device 10 is
It is determined whether the temperature is higher than the cooling water temperature in the inside. here,
When the stroke is determined, the process proceeds to step S113 to further increase the temperature of the engine 1. Then, the electric water pump 12 is operated to circulate the cooling water until the temperature of the cooling water in the water jacket 23 becomes equal to the temperature of the cooling water in the heat storage device 10. On the other hand, when a negative determination is made, the process proceeds to step S116. Since the effect is small even if the cooling water is circulated in this state, no further cooling water circulation is performed.

At step S116, the CPU 351
The operation of the electric water pump 12 is stopped.

At step S117, the CPU 351 determines
It is determined whether the voltage of the battery 30 is higher than a predetermined voltage (for example, 12 V). If it is determined that the voltage is higher than the predetermined voltage, the process proceeds to step S108, and the electric water pump 12 is turned off when the temperature of the cooling water in the water jacket 23 is reduced again and the conditions are satisfied before the engine 1 starts. Activate. When a negative determination is made, when the electric water pump 12 is operated, the voltage of the battery 30 is further reduced, and it becomes difficult to start the engine 1. Therefore, the process proceeds to step S118 to end the engine preheating control.

In step S118, the present routine is terminated, and the ECU 22 enters a rest state.

Next, how the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when such engine preheating control is performed will be described.

FIG. 4 is a time chart showing transition of output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when the engine preheating control is performed.

In the period A, the first engine temperature rise is performed. During this period, control corresponding to steps S105 to S107 in the flowchart of FIG. 3 is performed. At this time, the temperature of the cooling water in the heat storage device 10 into which the cooling water whose temperature has decreased in the water jacket 23 flows falls. In addition, the water jacket 2 into which the high-temperature cooling water kept warm by the heat storage device 10 flows.
The cooling water temperature in 3 rises. This period A ends when the electric water pump 12 operates for a predetermined time.

In the period B, the electric water pump 12 is stopped. During this period, control corresponding to steps S108 to S112 in the flowchart of FIG. 3 is performed. At this time, the temperature of the cooling water in the heat storage device 10 is maintained at a constant temperature, and the temperature of the cooling water in the water jacket 23 decreases because the engine 1 emits heat to the outside. The period B ends when the temperature of the cooling water in the water jacket 23 decreases to a predetermined temperature and the temperature of the cooling water in the water jacket 23 is lower than the temperature of the cooling water in the heat storage device 10.

In the period C, the temperature of the engine 1 is raised for the second time. During this period, control corresponding to steps S113 to S116 in the flowchart of FIG. 3 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period C ends when the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23 become equal.

In the period D, the electric water pump 12 is stopped. During this period, control corresponding to steps S108 to S112 in the flowchart of FIG. 3 is performed. At this time, the temperature of the cooling water in the heat storage device 10 maintains a constant temperature, and the temperature of the cooling water in the water jacket 23 decreases. This period D ends when the temperature of the cooling water in the water jacket 23 decreases to a predetermined temperature.

In the period E, the third temperature rise of the engine 1 is performed. During this period, control corresponding to steps S113 to S116 in the flowchart of FIG. 3 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period E ends when the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23 become equal.

Thus, the temperature of the engine 1 is repeatedly increased until the engine 1 is started.

Here, in the conventional engine, the cooling water (hot water) stored in the heat storage device is considered without considering the temperature of the cooling water in the heat storage device (the effect of increasing the temperature of the engine obtained by heat supply). ) For a predetermined period when the engine is started,
A control structure such as continuous supply to the engine was applied. For this reason, even if the temperature difference between the cooling water in the engine and the cooling water in the heat storage device becomes small and the effect of increasing the temperature of the engine by the heat supply is not sufficiently obtained, the heat supply is continuously performed. As a result, the heat stored in the heat storage device to be used for raising the temperature of the engine is unnecessarily lost, and the period in which the heat stored in the heat storage device can be utilized is shortened.

After the completion of the engine preheat control,
A considerable period may elapse before the driver actually starts the engine.Even if engine preheat control is completed, the engine must maintain the temperature after engine preheat control for as long as possible. Is desirable. Further, when the operation of the engine for a relatively short period is intermittently repeated, or when the engine has not been started for a long time since the end of the previous operation of the engine, a sufficient amount of heat is stored in the heat storage device. Not always.
On the other hand, the amount of cooling water stored in the heat storage device is limited from the viewpoint of ease of mounting on vehicles and the like, and manufacturing costs, etc. Preferably, it is improved.

In this respect, the heat storage device 10 according to the present embodiment
According to the engine 1 including the heat storage device, the heat supply from the heat storage device 10 to the engine 1 is intermittently performed while taking into account the temperature difference between the cooling water in the engine 1 and the cooling water in the heat storage device 10. Accordingly, even if the initial value of the temperature of the cooling water stored in the heat storage device 10 and the storage amount are the same, it is possible to obtain a long-term warm-up effect on the stopped engine 1.

As described above, according to the present embodiment, it is possible to raise the temperature of the cylinder head 1a for a long period of time for the engine 1 in the engine stopped state.

By setting the water jacket 23 so that the cooling water flows through the cylinder block 1b, the temperature of the cylinder block 1b can be raised at the same time.

In this embodiment, the engine 1
The heat supply from the heat storage device 10 to the engine 1 is intermittently performed while taking into account the temperature difference between the cooling water in the heat storage device 10 and the cooling water in the heat storage device 10. It is also possible to carry out the heat supply on the basis of this. <Second Embodiment> A heat storage device for an internal combustion engine according to the present embodiment differs from the heat storage device for an internal combustion engine according to the first embodiment in the following points.

In the first embodiment, the operating condition of the electric water pump 12 is that the temperature of the cooling water in the heat storage device 10 is higher than the temperature of the cooling water in the water jacket 23. On the other hand, in the second embodiment, the electric water pump 1 determines that the deviation between the cooling water temperature in the heat storage device 10 and the cooling water temperature in the engine 1 has become equal to or greater than a predetermined value.
It is assumed that the operation condition is 2. With this configuration, the electric water pump 12 is driven only when a sufficient effect of increasing the temperature can be obtained, so that the power consumption can be reduced.

In this embodiment, although the engine preheating control method is different from that of the first embodiment, the basic configuration of the engine 1 and other hardware to be used is the same as that of the first embodiment. The description is omitted because it is common to the embodiment.

Next, a control flow for performing the engine preheating control according to the present embodiment will be described.

FIG. 5 is a flowchart showing the flow of the engine preheat control. Step S212 is different from the flowchart shown in FIG.

In step S212, it is determined whether an execution condition for raising the temperature of engine 1 again is satisfied.

The elements used in the determination are the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine. Based on the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine, the CPU 351 calculates the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23,
It is determined whether these deviations are greater than a predetermined value.

If the determination is affirmative, the engine 1
The process proceeds to step S213 to increase the temperature.

If a negative determination is made, the process proceeds to step S208 without circulating the cooling water.

Here, if a negative determination is made, circulating the cooling water has little effect. The heat storage device 10
When the electric water pump 12 is operated when the temperature of the cooling water in the water jacket 23 is lower than the temperature of the cooling water in the water jacket 23, the temperature of the cooling water in the water jacket 23 decreases,
Therefore, the temperature of the engine 1 decreases. Therefore,
In such a state, the electric water pump 12 is not operated.

Next, how the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when such engine preheating control is performed will be described.

FIG. 6 is a diagram showing transitions of output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when the engine preheating control is performed.

In a period A, the first temperature increase of the engine 1 is performed. During this period, control corresponding to steps S105 to S107 in the flowchart of FIG. 5 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period A ends when the electric water pump 12 operates for a predetermined time.

In the period B, the electric water pump 12 is stopped. During this period, control corresponding to steps S108 to S112 in the flowchart of FIG. 5 is performed. At this time, the temperature of the cooling water in the heat storage device 10 keeps a constant temperature, and the temperature of the cooling water in the water jacket 23 decreases because the engine 1 emits heat to the outside. This period B ends when the difference between the temperature of the cooling water in the heat storage device 10 and the temperature of the cooling water in the water jacket 23 becomes larger than a predetermined value.

In the period C, the temperature of the engine 1 is raised for the second time. During this period, control corresponding to steps S113 to S116 in the flowchart of FIG. 5 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period C ends when the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23 become equal.

In the period D, the electric water pump 12 is stopped. During this period, control corresponding to steps S108 to S112 in the flowchart of FIG. 5 is performed. At this time, the temperature of the cooling water in the heat storage device 10 maintains a constant temperature, and the temperature of the cooling water in the water jacket 23 decreases. The period D ends when the difference between the temperature of the cooling water in the heat storage device 10 and the temperature of the cooling water in the water jacket 23 becomes larger than a predetermined value.

In the period E, the third temperature rise of the engine 1 is performed. During this period, control corresponding to steps S113 to S116 in the flowchart of FIG. 5 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period C ends when the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23 become equal.

As described above, the temperature of the engine 1 is repeatedly increased until the engine 1 is started.

In this way, the temperature of the cylinder head 1a can be raised for a long time while the engine 1 is stopped.

By setting the water jacket 23 so that the cooling water flows through the cylinder block 1b, the temperature of the cylinder block 1b can be raised at the same time. <Third Embodiment> A heat storage device for an internal combustion engine according to the present embodiment is different from the heat storage device for an internal combustion engine according to the above embodiment in the following points.

In the first and second embodiments, the temperature of the engine 1 is raised by using only the heat stored in the heat storage device 10, but in the present embodiment, the heat is stored in the heat storage device 10. The cooling water is heated by the generated heat and the heat obtained from the heater 32 to raise the temperature of the engine 1.

As shown in FIG. 7, heater 32 heats cooling water stored in heat storage device 10 and stored in heat storage device 10. The cylinder head 1a is provided with a wall temperature sensor 33 for detecting the wall temperature of the cylinder head 1a. Note that the basic configuration of the other hardware is the same as that of the first embodiment, and a description thereof will be omitted.

The heater 32 has a PTC thermistor (Positive Tem) formed by adding an additive to barium titanate.
perature Coefficient Thermistor). PT
The C thermistor is a heat-sensitive resistance element having a property that the resistance value rapidly rises when a predetermined temperature (Curie point) is reached. An element that generates heat by applying a voltage has a large resistance when it reaches the Curie point, so that it becomes difficult for current to flow, and the temperature decreases. Then, when the temperature decreases, the resistance is reduced, so that the current easily flows and the temperature increases. In this way, the PTC thermistor can perform self-temperature control that stabilizes at a substantially constant temperature without externally controlling the temperature.

By providing the heater 32 in this manner, the temperature of the cooling water circulated while the engine 1 is stopped and the temperature of which has decreased can be increased again, so that the temperature increasing function of the heat storage device 10 is maintained for a long time. It becomes possible.

Next, a control flow when performing the engine preheating control according to the present embodiment will be described.

FIG. 8 is a flowchart showing a flow of engine preheating control according to the present embodiment.

In steps S301 to S307, steps S101 to S10 shown in FIG.
Control similar to 7 is performed.

In the step S308, the CPU 351 determines
It is determined whether the voltage of the battery 30 is higher than a predetermined voltage (for example, 12 V). If it is determined that the voltage is higher than the predetermined voltage, the process proceeds to step S310. If a negative determination is made, when the heater 32 is operated, the voltage of the battery 30 is further reduced, and it becomes difficult to start the engine 1. Therefore, the process proceeds to step S309, and the heating of the coolant by the heater 32 is not performed. And

In step S310, the CPU 351 determines
When the temperature of the cooling water in the heat storage device 10 reaches a predetermined temperature (for example, 40
(° C). When an affirmative determination is made, the process proceeds to step S311. On the other hand, if a negative determination is made, the temperature of the cooling water in the heat storage device 10 can be increased without increasing the temperature of the engine 1 without heating by the heater 32. Is not heated.

In step S311, the CPU 351 determines
The wall temperature of the cylinder head 1a is a predetermined temperature (for example, 35 ° C.)
It is determined whether it is lower. The CPU 351 is a RAM
353 is accessed, and the output signal of the wall temperature sensor 33 is read. Based on the read signal, the cylinder head 1a
Is calculated and compared with a predetermined temperature (for example, 35 ° C.). When an affirmative determination is made, the process proceeds to step S312, and when a negative determination is made, the cylinder head 1
Since the wall temperature of a is high and it is not necessary to perform heating by the heater 32, the process proceeds to step S309, and the heating of the coolant by the heater 32 is not performed.

In the step S312, the CPU 351 executes
The heater 32 is energized to start raising the temperature of the cooling water.

[0177] In step S313, the CPU 351 determines
The CPU accesses the RAM 353 and reads the output signal of the in-engine cooling water temperature sensor 29.

In the step S314, the CPU 351 determines
It is determined whether the engine 1 has been started. CPU35
1 can determine the start of the engine 1 by accessing the RAM 353 and determining whether or not the output signal of the crank position sensor 27 has been updated. When the CPU 351 determines that the engine 1 is operating, the process proceeds to step S315 and proceeds to step S315.
Stops power supply to the heater 32. On the other hand, when a negative determination is made, the process proceeds to step S316 because there is a possibility that the temperature of the engine 1 heated in step S305 may need to be raised again.

[0179] In step S316, the CPU 351 determines
It is determined whether the voltage of the battery 30 is lower than a predetermined voltage (for example, 12 V). When the affirmative determination is made, when the heater 32 is operated, the voltage of the battery 30 further decreases, and it becomes difficult to start the engine 1. Therefore, the process proceeds to step S309, and the heating of the cooling water by the heater 32 is stopped. If a negative determination is made, step S3
Proceed to 18.

In step S318, the CPU 351 determines
When the cooling water temperature in the heat storage device 10 reaches a predetermined temperature (for example, 100
(° C). If a positive determination is made, there is no need to heat the cooling water anymore,
Proceeding to step S317, heating of the cooling water by the heater 32 is stopped. On the other hand, when a negative determination is made, the process proceeds to step S319.

In step S319, the CPU 351 sets
It is determined whether an execution condition for raising the temperature of the engine 1 again is satisfied. The elements used for the determination here are the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine. CPU 351 based on the output signal of engine internal coolant temperature sensor 29
Calculates the cooling water temperature in the water jacket 23,
It is determined whether or not the calculated temperature is lower than a predetermined temperature (for example, 30 ° C.). In addition, based on the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine, the CPU 351 determines whether the cooling water temperature in the heat storage device 10 is higher than the cooling water temperature in the water jacket 23. Is calculated. If it is determined that both of these two conditions are satisfied, the process proceeds to step S320 to raise the temperature of engine 1. On the other hand, when it is determined that any one of the above two conditions is not satisfied, the process proceeds to step S313 without circulating the cooling water.

If it is determined that any one of the above two conditions is not satisfied, the effect of circulating the cooling water is small. Further, when the electric water pump 12 is operated when the temperature of the cooling water in the heat storage device 10 is lower than the temperature of the cooling water in the water jacket 23, the temperature of the cooling water in the water jacket 23 decreases. Will decrease. Therefore, in such a state, the electric water pump 12 is not operated.

In step S320, the CPU 351 determines
Electric power is supplied to the electric water pump 12, the electric water pump 12 is operated, and the heater 32 is energized.

In step S321, step S314
The same determination as that described above is performed. When the CPU 351 determines that the engine 1 is operating, the process proceeds to step S322.
Then, the operation of the electric water pump 12 is stopped.
On the other hand, if a negative determination is made, step S305
Since the temperature of the engine 1 whose temperature has been raised in step S1 may decrease and it is necessary to raise the temperature again, the process proceeds to step S323. In step S323, it is determined whether or not an execution condition for raising the temperature of the engine 1 again is satisfied. The elements used for the determination here are the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine. CPU based on output signals of cooling water temperature sensor 28 in the heat storage device and cooling water temperature sensor 29 in the engine
351 calculates whether the temperature of the cooling water in the heat storage device 10 is higher than the temperature of the cooling water in the water jacket 23. If it is determined that this condition is satisfied, the process proceeds to step S320 to further increase the temperature of engine 1.
On the other hand, when a negative determination is made, step S324
Proceed to. Since the effect is small even if the cooling water is circulated in this state, no further cooling water circulation is performed.

In step S324, the CPU 351 determines
The operation of the electric water pump 12 is stopped.

In the step S325, in the step S314
The same determination as that described above is performed. When the CPU 351 determines that the engine 1 is operating, step S327
To end the engine preheat control and start the engine start control. On the other hand, if a negative determination is made, the process proceeds to step S326 because there is a possibility that the temperature of the engine 1 that has been raised in step S320 may need to be raised again.

In step S326, the CPU 351 determines
The voltage of the battery 30 is a predetermined voltage (for example, 11.5 V)
It is determined whether it is lower. When the affirmative determination is made, if the engine preheat control is further executed, the voltage of the battery 30 is further reduced and it becomes difficult to start the engine 1, so the engine preheat control is terminated. If a negative determination is made, the process proceeds to step S308, and the electric water pump 12 is operated when the temperature of the cooling water in the water jacket 23 has decreased again and the conditions are satisfied before the engine 1 starts.

Here, the voltage used as the determination condition in step S326 is lower than the voltage used as the determination condition in steps S308 and S316. This is because the electric power consumed by the electric water pump 12 is smaller than the electric power consumed by the heater 32. Therefore, when the heating by the heater 32 is performed, the voltage decreases and it becomes difficult to start the engine 1. This is because the engine 1 can be started because the amount of the decrease is small even if the voltage is reduced if only the cooling water is circulated by the pump 12.

Next, how the output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when such engine preheating control is performed will be described.

FIG. 9 is a time chart showing transition of output signals of the cooling water temperature sensor 28 in the heat storage device and the cooling water temperature sensor 29 in the engine when the engine preheating control is performed.

In the period A, the first temperature rise of the engine 1 is performed. During this period, control corresponding to steps S305 to S307 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period A ends when the electric water pump 12 operates for a predetermined time.

In the period B, the electric water pump 12 is stopped, and the cooling water in the heat storage device 10 is heated by the heater 32. During this period, control corresponding to steps S308 to S319 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 increases due to the heating of the heater 32, and the temperature of the cooling water in the water jacket 23 decreases because the engine 1 emits heat to the outside. The period B ends when the temperature of the cooling water in the water jacket 23 decreases to a predetermined temperature and the temperature of the cooling water in the water jacket 23 is lower than the temperature of the cooling water in the heat storage device 10.

In the period C, the temperature of the engine 1 is raised for the second time. During this period, control corresponding to steps S320 to S324 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period C ends when the cooling water temperature in the heat storage device 10 and the cooling water temperature in the water jacket 23 become equal.

In the period D, the electric water pump 12 is stopped, and the cooling water in the heat storage device 10 is heated by the heater 32. During this period, control corresponding to steps S308 to S319 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 increases due to the heating by the heater 32, and the temperature of the cooling water in the water jacket 23 decreases because the engine 1 emits heat to the outside.

In a period E, the electric water pump 12 is stopped, and the heating by the heater 32 is also stopped. This is the case where a positive determination is made in steps S316 and S318, and the energization of the heater 32 is stopped in step S317. During this period, control corresponding to steps S313 to S319 in the flowchart of FIG. 8 is performed. At this time, the cooling water temperature in the heat storage device 10 is maintained at a substantially constant temperature, and the water jacket 23
The temperature of the cooling water in the inside decreases because the engine 1 emits heat to the outside. This period E ends when the temperature of the cooling water in the water jacket 23 decreases to a predetermined temperature and the temperature of the cooling water in the water jacket 23 is lower than the temperature of the cooling water in the heat storage device 10.

In the period F, the third temperature rise of the engine 1 is performed. During this period, control corresponding to steps S320 to S324 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 decreases, and the temperature of the cooling water in the water jacket 23 increases. This period F ends when the temperature of the cooling water in the heat storage device 10 becomes equal to the temperature of the cooling water in the water jacket 23.

In the period G, the electric water pump 12 is stopped, and the heating by the heater 32 is also stopped. A negative determination is made in step S308, step S310, and step S311, or step S316 and step S316.
If an affirmative determination is made in step 318,
In step 309 or step S317, the power supply to the heater 32 is stopped. During this period, control corresponding to steps S308 to S326 in the flowchart of FIG. 8 is performed. At this time, the temperature of the cooling water in the heat storage device 10 is maintained at a substantially constant temperature.
The temperature of the cooling water in 3 decreases.

As described above, the processing is repeated until the engine 1 is started.

In this way, the temperature of the cylinder head 1a can be increased for a long time while the engine 1 is stopped.

Further, by setting the water jacket 23 so that the cooling water flows through the cylinder block 1b, the temperature of the cylinder block 1b can be raised at the same time. <Fourth Embodiment> The heat storage device for an internal combustion engine according to the present embodiment differs from the heat storage device for an internal combustion engine according to the third embodiment in the following points.

In the third embodiment, step S310
Is determined that the temperature of the cooling water in the heat storage device 10 is lower than the predetermined temperature, and the cylinder head 1 is determined in step S311.
When it is determined that the wall temperature of a is lower than the predetermined temperature, the heater 32 is energized.

On the other hand, in the present embodiment, such a determination is not made immediately after the operation of the electric water pump 12 is stopped, and the temperature of the cooling water is raised immediately. By doing so, the time until the next operation of the electric water pump 12 can be extended.

The basic configuration of the engine 1 and other hardware to which the present invention is applied is the same as in the third embodiment, and a description thereof will be omitted.

Next, FIG. 10 is a flowchart showing the flow of the engine preheating control according to the present embodiment.

As compared with the flowchart of FIG. 8, steps S310 and S310 according to the third embodiment are performed.
Except that there is no process corresponding to 311, the same process as that of the third embodiment is performed, and thus the description is omitted. <Fifth Embodiment> The heat storage device for an internal combustion engine according to the present embodiment is different from the heat storage device for an internal combustion engine according to the third embodiment in the following points.

In the third embodiment, a single heater 32 is provided in the heat storage device 10, but in the present embodiment, a plurality of heaters having different Curie points are provided.

The heater 32 is stored in the heat storage device 10 as shown in FIG. 11, and heats the cooling water stored in the heat storage device 10.

Inside the heat storage device 10, a high power heater 32a, a medium power heater 32b, and a low power heater 32c having different material compositions and different Curie points are provided.

By providing the heater 32 in this manner, when the temperature of the cooling water is low, heating is performed by the high power heater 32a,
As the temperature of the cooling water increases, the heater 32 can be switched stepwise between the middle power heater 32b and the low power heater 32c, so that the power consumption can be reduced.

The switching of the heaters 32 is performed by a changeover switch 34. This changeover switch 34
Executes switching of the heater 32 in response to a signal from the ECU 22.

Note that the basic configuration of the other hardware is the same as that of the third embodiment, so that the description is omitted.

Next, a control flow when performing engine preheating control according to the present embodiment will be described.

As compared with the third embodiment, the same processing as the third embodiment is performed, except that the processing corresponding to step S312 according to the third embodiment is different.

In the present embodiment, step S31
In 2, the CPU 351 selects the heater 32 to be energized, energizes the heater 32 via the changeover switch 34, and starts increasing the temperature of the cooling water.

Here, the CPU 351 accesses the RAM 353 and reads the output signal of the cooling water temperature sensor 28 in the heat storage device. The CPU 351 calculates the temperature of the cooling water in the heat storage device 10 based on the output signal. In addition, by storing in advance a map representing the relationship between the temperature of the cooling water in the heat storage device 10 and the heater 32 to be used in the ROM 352, the heater 32 that matches the calculated temperature can be selected.

After selecting the heater 32 to be used, the CPU
351 energizes the changeover switch 34 and switches the switch to energize the selected heater 32.

At this time, when the high power heater 32a is selected, the medium power heater 32b and the low power heater
By energizing 2c at the same time, the temperature of the cooling water can be raised earlier. Similarly, the medium power heater 32b
Is selected, if the low-power heater 32c is also energized at the same time, the temperature of the cooling water can be raised at an early stage.

Here, FIG. 14A shows the temperature in the heat storage device 10 when three types of heaters 32 having different Curie points are provided inside the heat storage device 10 and the heater 32 selected.
FIG. 14B shows the relationship between the selected heater 3
FIG. 4 is a diagram showing a relationship between a current supplied to the power supply 2 and a supply time.

As described above, as the temperature of the cooling water in the heat storage device 10 rises, the number of heaters 32 to be used is gradually reduced, so that the power consumption can be reduced.

Further, since the PTC thermistor is capable of self-temperature control as described above, it is possible to keep the temperature constant without using the changeover switch 34. But,
In the present invention, feedback control using an output signal of the cooling water temperature sensor 28 in the heat storage device is performed in order to perform temperature control with higher accuracy.

Although three types of heaters 32 having different material compositions and different Curie points are provided inside the heat storage device 10, the temperature control can be performed by the two types of heaters 32. Hereinafter, step S31 in the flowchart of FIG.
2 will be described.

FIG. 12A shows the inside of the heat storage device 10.
FIG. 12B shows the relationship between the temperature in the heat storage device 10 and the selected heater 32 when the high-power heater 32a and the low-power heater 32c having different Curie points are provided. It is a figure which shows the relationship between an electric current and its supply time.

When the temperature of the cooling water in the heat storage device 10 is low, the high-power heater 32a is selected, so that the temperature of the cooling water rises quickly. At this time, the CPU 351 determines the high-power heater 32a based on the temperature of the cooling water in the heat storage device 10.
To control the current supplied to the. As the current to be supplied, a map representing the relationship between the temperature of the cooling water in the heat storage device 10 and the current supplied to the high-power heater 32a is stored in the ROM 352 in advance. The CPU 351 determines the high-power heater 3 based on the calculated coolant temperature in the heat storage device 10 and the map.
The amount of current to be supplied to 2a is obtained, and the calculated current is supplied to the high-power heater 32a. Heating is performed by the high-power heater 32a, and the temperature of the cooling water can be raised at an early stage.

When the temperature in the heat storage device 10 rises to a predetermined temperature, the CPU 351 energizes the switch 34 and energizes the low-power heater 32c. At this time, since the high-power heater 32a is not energized, it is possible to keep the cooling water warm while suppressing power consumption.

Next, FIG. 13 (a) shows the temperature in the heat storage device 10 when the high power heater 32a and the low power heater 32c having different Curie points are provided inside the heat storage device 10. FIG. 13 (b)
FIG. 4 is a diagram showing a relationship between a current supplied to the heater 32 and a supply time. In the temperature control according to FIG.
Although the current supplied to the high-power heater 32a was controlled based on the temperature of the cooling water in the heat storage device 10, such control is not performed in the temperature control according to FIG. Only done.

Here, a map representing the relationship between the temperature of the cooling water in the heat storage device 10 and the heater 32 used is stored in advance in the ROM.
By storing the temperature in 352, the heater 32 corresponding to the calculated temperature can be selected.

That is, when the temperature of the cooling water in the heat storage device 10 is lower than the predetermined temperature, the high power heater 32a is selected, and when the temperature of the cooling water rises to the predetermined temperature, the low power heater 32c is selected. By doing so, the cooling water temperature can be raised quickly by the high power heater 32a, and the heat can be maintained while reducing the power consumption by the low power heater 32c.

In this embodiment, it is possible to control the temperature by using a heater other than the PCT thermistor.

In this way, the temperature of the cylinder head 1a can be raised for a long time while the engine 1 is stopped. In addition, by using a plurality of heaters in combination, power consumption can be reduced, and further, it is possible to prevent the temperature of the cooling water in the heat storage device 10 from rising excessively and boiling.

Further, by setting the water jacket 23 so that the cooling water flows through the cylinder block 1b, the temperature of the cylinder block 1b can be raised at the same time.

This embodiment can be carried out not only before the start of the engine 1 but also after the start. In this case, the process for determining the start of the engine 1 is not performed.

[0232]

According to the internal combustion engine provided with the heat storage device according to the present invention, the heat stored in the heat storage device can be repeatedly supplied to the internal combustion engine while the operation of the internal combustion engine is stopped. Therefore, even if the start of the internal combustion engine is postponed for some reason, it is possible to suppress the temperature of the internal combustion engine from decreasing for a long time.

In the internal combustion engine provided with the heat storage device according to the present invention, heat can be supplied to the heat storage device by providing the heat storage device with heating means. Accordingly, more heat can be supplied to the internal combustion engine, and even if the start of the internal combustion engine is postponed for some reason, it is possible to suppress the temperature of the internal combustion engine from decreasing over a long period of time.

As described above, according to the present invention, since the operation of the internal combustion engine can be started at a high temperature, the deterioration of the exhaust emission can be suppressed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing both an engine to which a heat storage device of an internal combustion engine according to a first embodiment is applied and a cooling water passage through which cooling water circulates.

FIG. 2 is a block diagram showing an internal configuration of an ECU.

FIG. 3 is a flowchart illustrating a flow of engine preheating control according to the first embodiment.

FIG. 4 is a coolant temperature sensor 28 in the heat storage device when engine preheating control according to the first embodiment is performed.
6 is a time chart showing transition of an output signal of a cooling water temperature sensor 29 in the engine.

FIG. 5 is a flowchart illustrating a flow of engine preheating control according to a second embodiment.

FIG. 6 is a time chart showing changes in the temperature of the cooling water in the heat storage device and the temperature of the cooling water in the engine when the engine preheating control according to the second embodiment is performed.

FIG. 7 is a diagram illustrating a schematic configuration of a heat storage device for an internal combustion engine according to a third embodiment.

FIG. 8 is a flowchart illustrating a flow of engine preheating control according to a third embodiment.

FIG. 9 is a time chart showing changes in the temperature of the cooling water in the heat storage device and the temperature of the cooling water in the engine when the engine preheating control according to the third embodiment is performed.

FIG. 10 is a flowchart illustrating a flow of engine preheating control according to a fourth embodiment.

FIG. 11 is a diagram showing a schematic configuration of a heat storage device for an internal combustion engine according to a fifth embodiment.

FIG. 12 (a) shows the relationship between the temperature in the heat storage device and the selected heater when a high power heater and a low power heater having different Curie points are provided inside the heat storage device; FIG. 12B is a diagram showing the relationship between the current supplied to the heater and the supply time.

FIG. 13 (a) shows the relationship between the temperature in the heat storage device and the selected heater when a high power heater and a low power heater having different Curie points are provided inside the heat storage device; FIG. 13B is a diagram showing the relationship between the current supplied to the heater and the supply time.

FIG. 14A shows the relationship between the temperature in the heat storage device and the selected heater when three types of heaters 32 having different Curie points are provided inside the heat storage device.
FIG. 4B is a diagram illustrating a relationship between the current supplied to the selected heater and the supply time.

[Explanation of symbols]

 1 ... Engine 1a ... Cylinder head 1b ... Cylinder block 1c ... Oil pan 2 ... Cylinder 3 ... Piston 4 ... Connecting rod 5 ... Fuel injection Valve 6 Water pump 8 Thermostat 9 Radiator 10 Heat storage device 10a Outer container 10b Inner container 10c Cooling water injection pipe 10d Cooling water discharge Pipe 11: check valve 12: electric water pump 13: heater core 22: ECU 23: water jacket 27: crank position sensor 28: cooling water temperature sensor in the heat storage device 29 ... Cooling water temperature sensor in engine 30 ... Battery 31 ... Shutoff valve 32 ... Heater 32a ... High power heater 32b ... Medium power heater ... Low-power heater 33... Wall temperature sensor 34... Changeover switch A... Circulating passage A1... Radiator inlet side passage A2. B1: heater core inlet side passage B2: heater core outlet side passage C: circulation passage C1: heat storage device inlet side passage C2: heat storage device outlet side passage

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02N 17/06 F02N 17/06 D (72) Inventor Katsuhiko Arisawa 1st Toyota Town, Toyota City, Aichi Prefecture Toyota Motor 3G084 BA30 CA07 DA10 EA06 EA07 FA03 FA20 FA38

Claims (23)

[Claims] An internal combustion engine provided with a heat storage device for storing heat, comprising: a circulating system for circulating a heat medium; and the heat stored by the heat storage device via the heat medium circulating in the circulating system. Heat supply means for supplying heat to the heat storage device, heat medium temperature measurement means for measuring at least one of the temperature of the heat medium inside the heat storage device or the temperature of the heat medium inside the internal combustion engine, and heat supplied by the heat supply means. Re-supply effect determining means for determining the effect at the time based on the measurement result of the heat medium temperature measuring means.The re-supply effect determining means repeatedly determines the effect of the heat supply, and performs the heat supply. An internal combustion engine provided with a heat storage device, wherein the heat supply means supplies heat when it is determined that there is an effect. 2. The heat medium temperature measuring means measures a temperature of a heat medium inside the heat storage device and a temperature of a heat medium inside the internal combustion engine, and measures a temperature of the heat medium inside the internal combustion engine. The internal combustion engine provided with a heat storage device according to claim 1, wherein heat is supplied to the internal combustion engine only when the temperature is lower than a temperature of a heat medium in the internal combustion engine. 3. The heat medium temperature measuring means measures the temperature of the heat medium inside the heat storage device and the temperature of the heat medium inside the internal combustion engine, and calculates the temperature of the heat medium inside the heat storage device and the temperature inside the internal combustion engine. The internal combustion engine provided with a heat storage device according to claim 1 or 2, wherein heat is supplied to the internal combustion engine only when a deviation from the temperature of the heat medium is equal to or greater than a predetermined value. 4. The heat medium temperature measuring means measures at least the temperature of the heat medium in the internal combustion engine, and supplies heat to the internal combustion engine only when the temperature in the internal combustion engine is lower than a predetermined temperature. An internal combustion engine provided with the heat storage device according to any one of claims 1 to 3. 5. An internal combustion engine provided with a heat storage device for storing heat, comprising: a circulating system for circulating a heat medium; and the heat stored by the heat storage device via the heat medium circulating in the circulating system. Heat supply means for supplying heat to the heat storage device, temperature measurement means for measuring the temperature of the heat medium inside the heat storage device, temperature measurement means for the internal combustion engine measuring the temperature of the heat medium inside the internal combustion engine, and the heat A resupply effect determining unit that determines an effect when heat is supplied by the supply unit based on the measurement results of the temperature measurement unit in the heat storage device and the temperature measurement unit in the internal combustion engine. The determining means repeatedly determines the effect of the heat supply, and when the heat supply is determined to be effective, the heat supply means supplies the heat, and the heat storage device is provided. Internal combustion engine. 6. The heat supply to the internal combustion engine is performed when the temperature measured by the internal temperature measuring means in the internal combustion engine is lower than the temperature measured by the temperature measuring means in the heat storage device. An internal combustion engine provided with the heat storage device according to claim 5. 7. The heat supply to the internal combustion engine is performed when a deviation of the temperature measured by the temperature measuring means in the heat storage device and the temperature measuring means in the internal combustion engine is equal to or more than a predetermined value. An internal combustion engine comprising the heat storage device according to claim 5. 8. The internal combustion engine according to claim 5, wherein heat is supplied to the internal combustion engine when the temperature measured by the internal combustion engine temperature measuring means is equal to or lower than a predetermined temperature. An internal combustion engine equipped with a heat storage device. 9. An internal combustion engine equipped with a heat storage device according to claim 1, wherein said heat storage device includes heating means for raising the temperature of a heat medium. 10. An internal combustion engine equipped with a heat storage device according to claim 9, wherein said heating means starts heating when said heat supply means stops supplying a heat medium. 11. The heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the heating means performs heating when the temperature of the heat medium in the heat storage device is lower than a predetermined temperature. An internal combustion engine provided with the heat storage device according to claim 9, which starts. 12. The heat medium temperature measuring means measures at least the temperature of the heat medium in the internal combustion engine, and the heating means performs heating when the temperature of the heat medium in the internal combustion engine is lower than a predetermined temperature. An internal combustion engine provided with the heat storage device according to claim 9, which starts. 13. The heat medium temperature measuring means measures at least one temperature of the heat medium inside the heat storage device or at least one temperature of the heat medium inside the internal combustion engine. When the circulation of the medium is stopped, the timing to start heating is determined based on at least one of the temperature of the heat medium in the heat storage device and the temperature of the heat medium in the internal combustion engine. Item 10. An internal combustion engine comprising the heat storage device according to item 9. 14. An internal combustion engine having a heat storage device according to claim 9, wherein said heating means starts heating when the temperature measured by said temperature measurement means in said heat storage device is equal to or lower than a predetermined temperature. organ. 15. An internal combustion engine having a heat storage device according to claim 9, wherein said heating means starts heating when the temperature measured by said internal combustion engine temperature measuring means is equal to or lower than a predetermined temperature. organ. 16. The heating means based on a temperature measured by at least one of the heat storage device temperature measurement means and the internal combustion engine temperature measurement means when the heat supply means stops circulation of the heat medium. An internal combustion engine provided with the heat storage device according to claim 9, wherein a timing to start heating is determined. 17. The apparatus according to claim 9, wherein said heating means includes: a heater which is supplied with electric power and whose temperature rises; and a supply power control means which controls an amount of electric power supplied to said heater. An internal combustion engine provided with the heat storage device as described in the above. 18. The heating means comprises a plurality of heaters each of which is supplied with electric power and whose temperature rises, and a supply power control means for controlling an amount of electric power supplied to the heater. An internal combustion engine comprising the heat storage device according to claim 17. 19. The heating means includes a plurality of heaters, each of which is supplied with electric power and whose temperature rises, and a plurality of supply power control means for controlling the amount of electric power supplied to the heaters. An internal combustion engine provided with the heat storage device according to claim 9, which is different. 20. The heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the heating means measures the temperature of the heat medium in the heat storage device until the temperature of the heat medium in the heat storage device reaches a predetermined temperature. 20. Heating is performed at a predetermined output of 1 and after reaching a predetermined temperature, heating is performed at a second predetermined output smaller than the first predetermined output. An internal combustion engine comprising the heat storage device according to any one of the above. 21. The heat medium temperature measuring means measures at least the temperature of the heat medium in the heat storage device, and the power supply control means performs output control based on the temperature of the heat medium in the heat storage device. 17. The method according to claim 17, wherein:
An internal combustion engine comprising the heat storage device according to any one of claims 9 to 9. 22. The heating device according to claim 1, wherein the temperature measured by the temperature measuring device in the heat storage device is a first temperature until the temperature reaches a predetermined temperature.
20. Heating is performed at a predetermined output, and after reaching a predetermined temperature, heating is performed at a second predetermined output smaller than the first predetermined output. An internal combustion engine provided with the heat storage device according to claim 1. 23. The heat storage device according to claim 17, wherein said supply power control means performs output control based on a temperature measured by said temperature measurement means in said heat storage device. Equipped internal combustion engine.