JP2003322018A - Internal combustion engine provided with heat accumulating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technique capable of favorably heating an engine-related element and an internal combustion engine provided with a heat accumulating device capable of selectively supplying heat accumulated by a heat accumulating container to the engine related element and the internal combustion engine. <P>SOLUTION: This internal combustion engine is provided with the heat accumulating device capable of selectively supplying high temperature heat medium stored in the heat accumulating container to the internal combustion engine and the engine-related element. By switching targets of the heat medium in accordance with time after starting supply of the heat medium, both the internal engine and the engine related element are heated. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine equipped with a heat storage device, and more particularly to a technique for detecting abnormality of the heat storage device.

[0002]

2. Description of the Related Art In an internal combustion engine mounted on a vehicle or the like, a heat storage container is provided for storing cooling water that has become hot during operation of the internal combustion engine in a heat storage state. A technique for supplying cooling water (heat-storage hot water) to a heater core for an internal combustion engine or indoor heating has been developed.

As such a technique, for example, a vehicle air conditioner as disclosed in Japanese Patent Laid-Open No. 7-257154 is known.

The vehicle air conditioner as described in the above publication is constructed so that the stored hot water stored in the heat storage container can be selectively supplied to the engine cooling water passage and the heat exchanger for heating. In a situation where the temperature of the cooling water is low and the temperature of the cooling water for the hot storage water in the heat storage container is high, when the indoor heating request is generated, the hot storage water is supplied from the heat storage container to the heating heat exchanger, and the indoor heating request is When it is not generated, heat storage hot water is supplied from the heat storage container to the engine cooling water passage.

That is, the vehicle air conditioner described in the above-mentioned publication uses the heat stored in the heat storage container to heat only the heating heat exchanger when the indoor heating request is generated, thereby heating the room. When no request is generated, the heat stored in the heat storage container is used to warm only the engine.

[0006]

Since the amount of heat stored in the heat storage container is finite, it is necessary to efficiently use the finite amount of heat. However, the above-described conventional vehicle air conditioner is configured to supply the stored hot water to only one of the internal combustion engine and the heating heat exchanger in consideration of only the presence or absence of the indoor heating request. It is hard to say that the amount of heat stored in the container is being used efficiently.

The present invention has been made in view of the above situation, and selectively heats the heat stored in the heat storage container to an engine-related element represented by a heat exchanger for indoor heating and an internal combustion engine. In an internal combustion engine equipped with a heat storage device capable of supplying to, the efficient use of the heat stored in the heat storage container,
Thus, it is an object of the present invention to provide a technique capable of suitably warming engine-related elements and an internal combustion engine.

[0008]

The present invention adopts the following means in order to solve the above problems. That is, an internal combustion engine provided with a heat storage device according to the present invention, a heat storage container for storing a heat medium in a heat storage state, and a supply means for supplying the heat medium stored in the heat storage container to the internal combustion engine or an engine-related element. Switching means for switching the supply destination of the heat medium according to the elapsed time from the start of supplying the heat medium by the supply means.

The present invention relates to an internal combustion engine equipped with a heat storage device capable of selectively supplying the high temperature heat medium stored in the heat storage container to the internal combustion engine and the engine-related elements, from the time when the supply of the heat medium is started. The greatest feature is that the supply destination of the heat medium is switched according to the elapsed time.

In the internal combustion engine provided with such a heat storage device, the switching means supplies the heat medium to the internal combustion engine and the engine-related elements in accordance with the elapsed time from the time when the supply means starts supplying the heat medium. Switch.

For example, the switching means supplies the heat medium from the heat storage container to the internal combustion engine within a predetermined time from the time when the supply of the heat medium by the supply means is started, and after the lapse of the predetermined time, the heat storage container causes the engine-related element. You may make it supply a heat medium to.

In this case, the heat medium stored in the heat storage container warms the engine-related elements after warming the internal combustion engine. That is, the internal combustion engine is warmed up prior to the machine-related elements.

On the other hand, the switching means supplies the heat medium from the heat storage container to the engine-related element within a predetermined time from the start of supplying the heat medium by the supply means, and after the predetermined time elapses, the heat storage container releases the heat from the internal combustion engine. You may make it supply a heat medium to.

In this case, the heat medium stored in the heat storage container warms the internal combustion engine after warming the engine-related elements. That is, the engine-related elements are warmed prior to the internal combustion engine.

It should be noted that which of the internal combustion engine and the engine-related element is preferentially warmed may be determined according to the environment in which the internal combustion engine including the heat storage device according to the present invention is used. . However, when the switch of the indoor heating device is off at the start of supplying the heat medium, the heat medium in the heat storage container may be supplied only to the internal combustion engine.

By switching the supply destination of the heat medium according to the elapsed time from the start of supplying the heat medium in this way, both the internal combustion engine and the engine-related element can be heated appropriately.

In the internal combustion engine provided with the heat storage device according to the present invention, as the engine-related element, a heat exchanger for exchanging heat between the heat medium and the room heating air can be exemplified. At that time, the switching means supplies the heat medium in the heat storage container to the internal combustion engine within a predetermined time from the start of supplying the heat medium, and after the predetermined time elapses, transfers the heat medium in the heat storage container to the heat exchanger. May be supplied to.

In this case, the internal combustion engine is first warmed by the high-temperature heat medium stored in the heat storage container, and then the room heating air is warmed.

When the internal combustion engine is preferentially warmed in this way, the ambient temperature in the intake port and the combustion chamber is raised and the temperature in the cylinder at the top dead center of the compression stroke (compression end temperature) is raised. In addition, the ignitability and combustibility of the fuel are improved, and the exhaust emission is improved. Furthermore, since the room heating air is also warmed after the internal combustion engine is warmed, it is possible to improve the exhaust emission of the internal combustion engine and improve the room heating performance.

In the internal combustion engine equipped with the heat storage device according to the present invention, the engine-related element may be a heat exchanger for exchanging heat between the heat medium and the lubricating oil of the transmission.

In this case, the switching means supplies the heat medium in the heat storage container to the internal combustion engine for a predetermined time from the start of supplying the heat medium, and after the predetermined time elapses, switches the heat medium in the heat storage container. You may make it supply to a heat exchanger.

In this case, the high temperature heat medium stored in the heat storage container warms the internal combustion engine first, and then the lubricating oil of the transmission.

When the internal combustion engine is preferentially warmed in this way, the exhaust emission of the internal combustion engine is improved. Furthermore, since the lubricating oil of the transmission is also warmed after the internal combustion engine has been warmed, the viscosity of the lubricating oil decreases. When the viscosity of the lubricating oil of the transmission decreases, the torque required for the internal combustion engine to operate the transmission decreases, so the fuel consumption rate of the internal combustion engine improves.
As a result, it is possible to improve the exhaust emission of the internal combustion engine and also improve the fuel consumption rate of the internal combustion engine.

In the internal combustion engine equipped with the heat storage device according to the present invention, instead of the heat exchanger for exchanging heat between the heat medium and the lubricating oil of the transmission, the lubricating oil of the heat medium and the internal combustion engine (engine A heat exchanger for exchanging heat with oil) may be provided, or in addition to the heat exchanger for exchanging heat between the heat medium and the lubricating oil of the transmission, You may make it provide with the heat exchanger which heat-exchanges between them. This is because when the engine oil is heated by the heat of the heat medium, the viscosity of the engine oil is lowered, and thus the fuel consumption rate of the internal combustion engine can be improved.

In the internal combustion engine provided with the heat storage device according to the present invention, the engine-related elements are the first heat exchanger for exchanging heat between the heat medium and the room heating air, and the heat medium and the transmission. A second heat exchanger that exchanges heat with the lubricating oil may be provided.

At this time, the switching means supplies the heat medium in the heat storage container to the internal combustion engine within a first predetermined time from the start of supplying the heat medium, and the second time is elapsed from the time when the first predetermined time has elapsed. The heat medium in the heat storage container is supplied to the first heat exchanger within the predetermined time, and the heat medium in the heat storage container is supplied to the second heat exchanger after the second predetermined time has elapsed. Good.

In this case, the high-temperature heat medium stored in the heat storage container sequentially warms the lubricating oil of the internal combustion engine, the room heating air, and the transmission.

When the internal combustion engine, the air for indoor heating, and the lubricating oil of the transmission are sequentially warmed in this way, first, the exhaust emission of the internal combustion engine is improved. When the room heating air is heated next to the internal combustion engine, the room heating performance is improved. Further, when the lubricating oil of the transmission is heated next to the air for indoor heating, the fuel consumption rate of the internal combustion engine is improved.

As a result, it is possible to improve the indoor heating performance and the fuel consumption rate of the internal combustion engine while improving the exhaust emission of the internal combustion engine.

When the switch of the indoor heating device is off at the time when the supply of the heat medium by the supply means is started, the switching means switches the heat medium in the heat storage container within a predetermined time from the time when the supply of the heat medium is started. Alternatively, the heat medium in the heat storage container may be supplied to the second heat exchanger after the predetermined time has elapsed.

The engine-related elements according to the present invention include a heat exchanger for exchanging heat between the heat medium and room heating air, and a heat exchanging heat for exchanging heat between the heat medium and the lubricating oil of the transmission. In addition to the exchanger, a heat exchanger that exchanges heat between the heat exchanger and the lubricating oil (engine oil) of the internal combustion engine can be exemplified.

Next, the present invention may employ the following means in order to solve the above-mentioned problems. That is,
An internal combustion engine provided with a heat storage device according to the present invention, a heat storage container for storing a heat medium in a heat storage state, a supply means for supplying the heat medium stored in the heat storage container to an internal combustion engine or an engine-related element, and Switching means for switching the supply destination of the heat medium according to the temperature of the internal combustion engine at the time when the supply means starts the supply of the heat medium may be provided.

The present invention relates to an internal combustion engine equipped with a heat storage device capable of selectively supplying the high temperature heat medium stored in the heat storage container to the internal combustion engine and the engine-related elements. The greatest feature is that the supply destination of the heat medium is switched according to the temperature of the engine.

In the internal combustion engine provided with such a heat storage device, the switching means supplies the heat medium to the internal combustion engine and the engine-related element according to the temperature of the internal combustion engine at the time when the supply means starts the supply of the heat medium. Switch.

For example, the switching means may supply the heat medium in the heat storage container to the engine-related element when the temperature of the internal combustion engine at the start of supplying the heat medium is lower than the first predetermined temperature. . The above-mentioned first predetermined temperature is a temperature extremely lower than the temperature of the internal combustion engine in a warm-up state, and is a temperature set to a temperature lower than normal temperature (for example, 0 ° C. or lower).

This is because the amount of the heat medium in the heat storage container is limited, but the heat capacity of the internal combustion engine is large. Therefore, when the temperature of the internal combustion engine is excessively low, the heat medium in the heat storage container is transferred to the internal combustion engine. This is because it becomes difficult to warm the internal combustion engine sufficiently even if the internal combustion engine is supplied.

At this time, if the engine-related element is a heat exchanger for exchanging heat between the heat medium and the room heating air, the switching means supplies the heat medium in the heat storage container to the heat exchanger. By doing so, the room heating air may be warmed.
In this case, the indoor temperature of the vehicle can be set to a temperature suitable for driving operation. If the engine-related element is a heat exchanger that exchanges heat between the lubricating oil of the transmission or the lubricating oil of the internal combustion engine and the heat medium, the switching means transfers the heat medium in the heat storage container to the heat exchanger. By supplying
You may make it warm the lubricating oil of a transmission or an internal combustion engine. In this case, the viscosity of the lubricating oil of the transmission or the internal combustion engine is reduced, so that the fuel consumption rate of the internal combustion engine can be improved.

As engine-related elements, a first heat exchanger for exchanging heat between the indoor heating air and the heat medium, and
When a second heat exchanger for exchanging heat between the lubricating oil of the transmission or the lubricating oil of the internal combustion engine and the heat medium is provided, the switching means changes the heat medium in the heat storage container to the first heat medium.
May be supplied only to the heat exchanger. However, when the switch of the indoor heating device is off at the time of starting the supply of the heat medium, the switching means may supply the heat medium in the heat storage container only to the second heat exchanger.

On the other hand, when the temperature of the internal combustion engine at the start of supplying the heat medium is equal to or higher than the above-mentioned first predetermined temperature, the switching means supplies the heat medium in the heat storage container to the internal combustion engine. Good.

This is because when the internal combustion engine is in the normal temperature range above the predetermined temperature, the temperature of the internal combustion engine is raised to the temperature range where the exhaust emission is improved by the finite heat medium stored in the heat storage container. It is based on the finding that it becomes possible to heat the body.

However, when the temperature of the internal combustion engine at the time of starting the supply of the heat medium is equal to or higher than a second predetermined temperature (for example, a temperature set to 40 ° C. or higher) which is set higher than the first predetermined temperature described above. Alternatively, the switching means may supply the heat medium in the heat storage container to the engine-related element.

When the temperature of the internal combustion engine is sufficiently high, the ambient temperature in the intake port and the combustion chamber is high and the compression end temperature in the cylinder is high, so that the heat medium in the heat storage container is not supplied to the internal combustion engine. Exhaust emissions are unlikely to deteriorate. Therefore, if the temperature of the internal combustion engine is sufficiently higher than room temperature,
It is appropriate to improve the indoor heating performance and the fuel consumption rate by supplying the heat medium in the heat storage container to the engine-related elements.

As engine-related elements, the first heat exchanger for exchanging heat between the room heating air and the heat medium, and the lubricating oil of the transmission or the lubricating oil of the internal combustion engine and the heat medium. In the case where the second heat exchanger for exchanging heat is provided, the switching means changes the first from the heat storage container when the temperature of the internal combustion engine at the start of supplying the heat medium is lower than the first predetermined temperature. The heat medium is supplied to the heat exchanger of the internal combustion engine, and the temperature of the internal combustion engine at the start of supply of the heat medium is
Is higher than the predetermined temperature and lower than the second predetermined temperature, the heat medium is supplied from the heat storage container to the internal combustion engine. The heat medium may be supplied from the heat storage container to the second heat exchanger.

Thus, by changing the supply destination of the heat medium according to the temperature of the internal combustion engine at the time of starting the supply of the heat medium, the heat stored in the heat storage container is transferred to at least one of the internal combustion engine and the engine-related element. As a result, the internal combustion engine and / or the engine-related element are appropriately warmed.

In the internal combustion engine equipped with the heat storage device according to the present invention, the temperature of the internal combustion engine is the cooling water temperature of the water-cooled internal combustion engine, the temperature of the lubricating oil (engine oil) of the internal combustion engine, and the intake air temperature of the internal combustion engine. Alternatively, at least one of the outside temperature can be used.

In the internal combustion engine equipped with the heat storage device according to the present invention, examples of the heat medium include cooling water of a water-cooled internal combustion engine and lubricating oil (engine oil) of the internal combustion engine.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of an internal combustion engine equipped with a heat storage device according to the present invention will be described below with reference to the drawings.

<First Embodiment> First, a first embodiment of an internal combustion engine equipped with a heat storage device according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

FIG. 1 is a diagram showing a cooling water circulation system of an internal combustion engine to which the present invention is applied. The internal combustion engine 1 is a compression ignition type internal combustion engine (diesel engine) that uses light oil as a fuel or a spark ignition type internal combustion engine (gasoline engine) that uses gasoline as a fuel, and is an engine mounted on an automobile.

The internal combustion engine 1 has a cylinder head 1a and a cylinder block 1b. Cylinder head 1
A head side cooling water channel 2a and a block side cooling water channel 2b for circulating cooling water as a heat medium according to the present invention are formed in each of a and the cylinder block 1b, and the head side cooling water channel 2a and the block side cooling water channel 2a are formed. The cooling water passage 2b communicates with each other.

A first cooling water passage 4 is connected to the head-side cooling water passage 2a, and the first cooling water passage 4 is connected to a cooling water inlet of a radiator 5. The radiator 5
The cooling water outlet is connected to the thermostat valve 7 via the second cooling water passage 6.

In addition to the second cooling water passage 6, a third cooling water passage 8 and a bypass water passage 9 are connected to the thermostat valve 7. The third cooling water passage 8 is connected to a suction port of a mechanical water pump 10 that uses a rotational torque of an engine output shaft (crankshaft) of the internal combustion engine 1 as a drive source. The block side cooling water passage 2b is connected to the discharge port of the mechanical water pump 10. On the other hand, the bypass water channel 9 is the head side cooling water channel 2
connected to a.

Here, the radiator 5 is a heat exchanger for exchanging heat between the cooling water flowing through the radiator 5 and the outside air. In addition, the thermostat valve 7 described above
Is a flow path switching valve that shuts off either the second cooling water passage 6 or the bypass water passage 9 depending on the temperature of the cooling water. Specifically, the thermostat valve 7 shuts off the second cooling water passage 6 when the temperature of the cooling water flowing through the thermostat valve 7 is lower than a predetermined valve opening temperature: Temp1 (for example, 80 ° C to 90 ° C). Bypass waterway 9 at the same time
Is opened to connect the third cooling water passage 8 and the bypass water passage 9 with each other. The temperature of the cooling water flowing through the thermostat valve 7 is equal to the valve opening temperature T
When it is equal to or more than emp1, the second cooling water channel 6 is opened and the bypass water channel 9 is cut off at the same time as the third cooling water channel 8 and the second cooling water channel 8.
The cooling water passage 6 is electrically connected.

Next, a heater hose 11 is connected in the middle of the above-mentioned first cooling water passage 4, and this heater hose 11 is connected in the middle of the above-mentioned third cooling water passage 8. A heater core 12 that exchanges heat between the cooling water and the room heating air is arranged in the middle of the heater hose 11. The heater core 12 is an embodiment of the engine-related element according to the present invention.

The heater core 12 and the third cooling water passage 8
A first bypass passage 13a is connected in the middle of the heater hose 11 located between and. The first bypass passage 13a is connected to the cooling water suction port of the electric water pump 14.

The electric water pump 14 is a water pump driven by an electric motor, and is configured to discharge the cooling water sucked from the cooling water suction port from the cooling water discharge port.

The cooling water discharge port of the electric water pump 14 is connected to the heat storage container 15 via the second bypass passage 13b.
Is connected to the cooling water inlet. The heat storage container 15 is a container that stores the cooling water while storing the heat of the cooling water.
When new cooling water flows in from the cooling water inlet, the cooling water stored in the heat storage container 15 is discharged from the cooling water outlet instead.

It should be noted that one-way valves 15a and 15b for preventing backflow of the cooling water are attached to each of the cooling water inlet and the cooling water outlet of the heat storage container 15.

The cooling water outlet of the heat storage container 15 has a third
The bypass passage 13c is connected, and the third bypass passage 13c is connected to the heater hose 11 located between the heater core 12 and the first cooling water passage 4.

In the heater hose 11 located between the heater core 12 and the first cooling water passage 4, the portion on the first cooling water passage 4 side is the first heater hose 11a based on the connection portion of the third bypass passage 13c. And a portion on the heater core 12 side is referred to as a second heater hose 11b. Further, in the heater hose 11 located between the heater core 12 and the third cooling water passage 8, a portion on the heater core 12 side based on the connection portion of the first bypass passage 13a is referred to as a third heater hose 11c, and The portion on the cooling water passage 8 side is referred to as a fourth heater hose 11d.

A flow path switching valve 16 is provided at the connecting portion of the first heater hose 11a, the second heater hose 11b, and the third bypass passage 13c. The passage switching valve 16 selectively shuts off any one of the three passages. The flow path switching valve 16 is driven by an actuator such as a step motor.

The heater hose 11, the first bypass passage 13a, the second bypass passage 13b, the third bypass passage 13c, and the electric water pump 14 described above correspond to the supply means according to the present invention.

In the third bypass passage 13c, in the vicinity of the cooling water outlet of the heat storage container 15, the temperature of the cooling water flowing in the third bypass passage 13c (that is,
The 1st water temperature sensor 17 which outputs the electric signal corresponding to the temperature of the cooling water which flows out from the heat storage container 15 is attached. Further, the second water temperature sensor 18 for outputting an electric signal corresponding to the temperature of the cooling water flowing in the first cooling water passage 4 is provided in the vicinity of the connection portion of the first cooling water passage 4 with the head side cooling water passage 2a. Is attached.

In the cooling water circulation system configured as described above,
An electronic control unit (ECU) 39 for controlling the operating state of the cooling water circulation system is also provided. The ECU 39 includes a CPU, a ROM,
It is an arithmetic logic operation circuit composed of a RAM, a backup RAM, an input port, an output port, an A / D converter, and the like. The ECU 39 may be provided independently of the ECU for controlling the operating state of the internal combustion engine 1, or may be used in combination.

In addition to the first water temperature sensor 17 and the second water temperature sensor 18 described above, the ECU 39 includes an ignition switch 40 and a starter switch 4 provided inside the vehicle compartment.
1 and switch (heater switch) 4 for indoor heating device
2 are electrically connected, and the output signals of these various sensors are input to the ECU 39.

Further, the electric water pump 14 and the flow passage switching valve 16 described above are electrically connected to the ECU 39, so that the ECU 39 can control the electric water pump 14 and the flow passage switching valve 16. .

Specifically, the ECU 39 operates according to an application program stored in the ROM, and executes cooling water flow switching control for switching the flow of cooling water in the cooling water circulation system.

The cooling water flow switching control in this embodiment will be described below. First, when the internal combustion engine 1 is in operation, the mechanical water pump 10 operates by receiving the rotational torque of the crankshaft. On the other hand, E
The CU 39 controls the flow path switching valve 16 to shut off the second heater hose 11b, and also controls the electric water pump 14 to a stopped state.

In this case, the electric water pump 14 does not operate but only the mechanical water pump 10 operates, and if the temperature of the cooling water at that time is less than the valve opening temperature of the thermostat valve 7: Temp1. The thermostat valve 7 closes the second cooling water passage 6 and simultaneously opens the bypass water passage 9.

Therefore, the internal combustion engine 1 is in the operating state, and the temperature of the cooling water is the opening temperature of the thermostat valve 7:
When it is less than Temp1, as shown in FIG. 2, mechanical water pump 10 → block side cooling water channel 2b → head side cooling water channel 2a → bypass water channel 9 → thermostat valve 7 → third cooling water channel 8 → mechanical water pump A circulation circuit in which cooling water flows is established in the order of 10.

When the circulation circuit as shown in FIG. 2 is established, relatively low temperature cooling water flowing out from the internal combustion engine 1 bypasses the radiator 5, so that the cooling water becomes unnecessary by the radiator 5. It will not be cooled. As a result, the warm-up of the internal combustion engine 1 is not hindered.

After that, the warm-up of the internal combustion engine 1 is completed, and the temperature of the cooling water is the opening temperature of the thermostat valve 7: Tem.
When p1 or more, the thermostat valve 7 opens the second cooling water passage 6 and at the same time shuts off the bypass water passage 9.

That is, the internal combustion engine 1 is in operation and the temperature of the cooling water is the temperature at which the thermostat valve 7 is opened: T
When it is equal to or more than emp1, as shown in FIG. 3, the mechanical water pump 10 → the block side cooling water channel 2b → the head side cooling water channel 2a → the first cooling water channel 4 → the radiator 5 → the second cooling water channel 6 → the thermostat valve 7 → 3rd cooling water channel 8 →
A circulation circuit in which the cooling water flows is established in the order of the mechanical water pump 10.

When the circulation circuit as shown in FIG. 3 is established, relatively high temperature cooling water flowing out from the internal combustion engine 1 flows through the radiator 5, so that the heat of the cooling water is radiated by the radiator 5. It In this case, radiator 5
The cooling water having a relatively low temperature after being radiated by the cooling water passage 2a and the cooling water passage 2b on the head side of the internal combustion engine 1
Therefore, the heat of the internal combustion engine 1 is transferred to the cooling water. As a result, overheating of the internal combustion engine 1 is prevented.

Further, when the internal combustion engine 1 is in operation and the temperature of the cooling water is the temperature at which the thermostat valve 7 is opened: Tem
When the heater switch 42 is turned on when p1 or more, the ECU 39 keeps the electric water pump 14 in a stopped state, shuts off the third bypass passage 13c, and cuts off the first heater hose 11a and the second heater. The flow path switching valve 16 is controlled so that the hose 11b is electrically connected.

In this case, as shown in FIG. 4, the same circulation circuit as the circulation circuit described in the explanation of FIG. 3 is established, and at the same time, the mechanical water pump 10 → block side cooling water passage 2b → head side cooling water passage. 2a → first cooling water passage 4 →
First heater hose 11a → flow path switching valve 16 → second heater hose 11b → heater core 12 → third heater hose 11
A circulation circuit in which cooling water flows is established in the order of c → fourth heater hose 11d → third cooling water passage 8 → mechanical water pump 10.

When the circulation circuit as shown in FIG. 4 is established, the relatively high temperature cooling water flowing out from the internal combustion engine 1 flows into the heater core 12, so that the heater core 1
In 2, the heat of the cooling water is transferred to the room heating air. As a result, the indoor heating air is warmed.

On the other hand, when the internal combustion engine 1 is cold started or is in a cold state immediately after starting, the temperature of the intake port wall surface and the combustion chamber wall surface becomes low, so the fuel injected from the fuel injection valve Hard to vaporize. For this reason, the fuel injected from the fuel injection valve easily adheres to the wall surface of the intake port and the wall surface of the combustion chamber, making it difficult to form a highly combustible mixture. Furthermore, when the internal combustion engine 1 is in the cold state, the temperature in the cylinder (combustion chamber) at the top dead center of the compression stroke (so-called compression end temperature) also becomes low, so that it becomes difficult for the fuel to ignite and burn.

As described above, when it is difficult to form a highly combustible mixture in the internal combustion engine 1 and it becomes difficult to ignite and burn the fuel, the startability is lowered, the combustion stability is lowered, or the amount of unburned fuel components is increased. This causes deterioration of exhaust emission.

Therefore, when the internal combustion engine 1 is in a cold state, the flow path switching valve 1 is used to shut off the second heater hose 11b.
By controlling 6 and operating the electric water pump 14, as shown in FIG. 5, the electric water pump 14 → second bypass passage 13b → heat storage container 15 →
Third bypass passage 13c → flow passage switching valve 16 → first heater hose 11a → first cooling water passage 4 → head side cooling water passage 2a
→ Block side cooling water channel 2b → Mechanical water pump 1
A method of establishing a circulation circuit in which cooling water flows in the order of 0 → third cooling water passage 8 → fourth heater hose 11d → first bypass passage 13a → electric water pump 14 can be considered.

When the circulation circuit as shown in FIG. 5 is established,
The cooling water discharged from the electric water pump 14 is the second
It flows into the heat storage container 15 via the bypass passage 13b, and in exchange for it, hot cooling water in the heat storage container 15 (hereinafter referred to as heat storage hot water) is discharged from the cooling water outlet.

The heat storage hot water discharged from the cooling water outlet of the heat storage container 15 is supplied to the third bypass passage 13c and the passage switching valve 1.
6, the first heater hose 11a, and the first cooling water passage 4, flow into the head side cooling water passage 2a of the internal combustion engine 1, and then from the head side cooling water passage 2a to the block side cooling water passage 2b.
Flow into.

When the stored hot water stored in the heat storage container 15 flows into the head-side cooling water passage 2a and the block-side cooling water passage 2b as described above, the heat-storage hot water originally replaces the head-side cooling water passage 2a and the block-side cooling water passage 2b. The retained low-temperature cooling water is discharged from the head-side cooling water passage 2a and the block-side cooling water passage 2b. As a result, the heat of the stored hot water is transmitted to the cylinder head 1a and the cylinder block 1b of the internal combustion engine 1, and the cylinder head 1a and the cylinder block 1b are warmed.

In the circulation circuit as shown in FIG. 5, the heat storage hot water from the heat storage container 15 is supplied to the block side cooling water passage 2b after passing through the head side cooling water passage 2a, so that the cylinder head 1a is given priority. Be warmed. Further, in the circulation circuit as shown in FIG. 5, since there is no member having a large heat capacity such as the heater core 12 in the path from the heat storage container 15 to the head side cooling water passage 2a, the heat stored in the heat storage container 15 is unnecessary. Cylinder head 1 without radiating heat to
will be transmitted to a.

When the cylinder head 1a is preferentially heated by the heat storage hot water stored in the heat storage container 15,
The wall temperature of the intake port (not shown) of the cylinder head 1a, the wall temperature of the combustion chamber, etc. rapidly rise.

In this case, the vaporization of the fuel at the time of starting the internal combustion engine 1 and immediately after the starting is promoted and the compression end temperature is raised, so that the ignitability and combustibility of the fuel are improved, and the amount of the fuel adhering to the wall surface is reduced. As a result, it is possible to improve the startability, shorten the warm-up operation time, and improve the exhaust emission.

Further, when the internal combustion engine 1 is in the cold state, the temperature of the cooling water also becomes low, so that it becomes difficult to sufficiently warm the indoor heating air, and it becomes impossible to obtain the desired heating performance. Become. Therefore, in order to obtain a desired heating performance when the internal combustion engine 1 is in the cold state, the heater core 1
It is necessary to raise the temperature of the cooling water flowing through 2.

On the other hand, when the internal combustion engine 1 is in the cold state and the heater switch 42 is on, the flow passage switching valve 16 is controlled to shut off the first heater hose 11a, and the electric water pump 14 is controlled. By operating the electric water pump 14 →
Second bypass passage 13b → heat storage container 15 → third bypass passage 13c → passage switching valve 16 → second heater hose 11b
A method of establishing a circulation circuit in which cooling water flows in the order of the heater core 12, the third heater hose 11c, the first bypass passage 13a, and the electric water pump 14 can be considered.

When the circulation circuit as shown in FIG. 6 is established,
The cooling water discharged from the electric water pump 14 is the second
The heat storage hot water in the heat storage container 15 is discharged from the cooling water outlet instead of flowing into the heat storage container 15 via the bypass passage 13b.

The heat storage hot water discharged from the cooling water outlet of the heat storage container 15 is supplied to the third bypass passage 13c and the passage switching valve 1
6 and the second heater hose 11b, the low-temperature cooling water that originally flows into the heater core 12 and instead stays in the heater core 12 is discharged from the heater core 12. Then, the heat of the stored hot water is transferred to the room heating air via the heater core 12, and the room heating air is appropriately warmed. As a result, it becomes possible to improve the indoor heating performance when the internal combustion engine 1 is in the cold state.

By the way, when the internal combustion engine 1 is in a cold state and the circulation circuit as described in the explanation of FIG. 5 is established, the starting performance, combustion stability and exhaust emission of the internal combustion engine 1 are improved. Although it is possible to improve the indoor heating performance, it is difficult to improve the indoor heating performance. On the other hand, if the circulation circuit as described in the description of FIG. 6 is established, the indoor heating performance can be improved, but the internal combustion engine 1 Startability of
It becomes difficult to improve combustion stability and exhaust emission.

Therefore, in the cooling water flow switching control in the present embodiment, the ECU 39 determines that the internal combustion engine 1 is in the cold state and the heater switch 42 is in the on state.
The electric water pump 14 supplies the heat storage hot water to the internal combustion engine 1 and the heat storage hot water to the heater core 12.
The switching is made according to the elapsed time from the start of the operation of.

[0093] More specifically, ECU 39, as shown in FIG. 7, a predetermined time from the actuation start time of the electric water pump 14: T ₁ control the flow path switching valve 16 so as to cut off the second heater hose 11b By doing so, the circulation circuit as described in the above description of FIG. 5 is established, and after the lapse of the predetermined time T _{1, the} flow path switching valve 16 is controlled to shut off the first heater hose 11a. Therefore, the circulation circuit as described in the description of FIG. 6 may be established. In this case, the stored hot water warms the internal combustion engine 1 within a predetermined time T ₁ from the start of the operation of the electric water pump 14, and after the above predetermined time T ₁ elapses, heats the heater core 12 (air for indoor heating). It will warm up. As a result, the startability and exhaust emission of the internal combustion engine 1 are preferentially improved as compared with the indoor heating performance.

Further, the ECU 39, as shown in FIG.
From the start of the operation of the electric water pump 14 for a predetermined time: Within T ₁ , the flow path switching valve 16 is controlled so as to shut off the first heater hose 11a to establish the circulation circuit as described in the explanation of FIG. Then, the above predetermined time:
After the lapse of T _{1, the} flow path switching valve 16 may be controlled to shut off the second heater hose 11b to establish the circulation circuit as described in the description of FIG. 5 above. In this case, the stored hot water is the electric water pump 1
Predetermined time from the start of operation of _No. 4: heater core 1 within T 1
2 (room heating air) is warmed and the above-mentioned predetermined time: T ₁
After the lapse of time, the internal combustion engine 1 is warmed. As a result, the indoor heating performance is preferentially improved as compared with the startability of the internal combustion engine 1 and the exhaust emission.

Which of the internal combustion engine 1 and the heater core 12 is preferentially supplied with the stored hot water may be determined according to the usage environment of the vehicle to which the present invention is applied.

Here, the cooling water flow switching control when the internal combustion engine 1 is in the cold state will be specifically described with reference to FIG. Here, the cooling water flow switching control when the stored hot water is supplied to the internal combustion engine 1 with priority over the heater core 12 will be described.

FIG. 9 is a flow chart showing a cooling water flow switching control routine when the internal combustion engine 1 is in the cold state. The cooling water flow switching control routine is executed by the ECU 3 in advance.
9 is a routine that is stored in the ROM, and is a routine that the ECU 39 executes when the ignition switch 40 is switched from off to on.

In the cooling water flow switching control routine, the ECU
First, 39 determines whether or not the ignition switch has been switched from OFF to ON in S901.

When it is determined in S901 that the ignition switch has not been switched from off to on, the ECU 39 ends the execution of this routine.

On the other hand, if it is determined in S901 that the ignition switch has been switched from OFF to ON, the ECU 39 proceeds to S902, where the internal combustion engine 1
Coolant water temperature inside (engine side water temperature): Enter THW. Here, the output signal value of the second water temperature sensor 18 can be used as the engine side water temperature: THW.

In S903, the ECU 39 determines that the S90
It is determined whether or not the engine side water temperature THW input in 2 is less than a predetermined temperature (water temperature after completion of warming up of the internal combustion engine 1 or a temperature close to it (for example, 40 ° C.)): Tbase.

In S903, the engine side water temperature: TH
If it is determined that W is equal to or higher than the predetermined temperature, EC
U39 determines that it is not necessary to warm the internal combustion engine 1 and the heater core 12, and ends the execution of this routine. This is because if the engine side water temperature: THW is above a certain temperature,
This is because the temperatures of the intake port wall surface and the combustion chamber wall surface of the internal combustion engine 1 are also sufficiently high, and the cooling water is sufficiently equipped with the amount of heat required to warm the indoor heating air. If it is determined in S903 that the engine side water temperature: THW is lower than the predetermined temperature, the ECU 39
Advances to S904, and controls the flow path switching valve 16 to shut off the second heater hose 11b.

At S905, the ECU 39 applies drive power to the electric water pump 14 to operate the electric water pump 14.

In this case, as described in the description of FIG. 5 above, the electric water pump 14 → the second bypass passage 1
3b → heat storage container 15 → third bypass passage 13c → flow passage switching valve 16 → first heater hose 11a → first cooling water passage 4 →
A circulation circuit in which cooling water flows is formed in the order of head side cooling water passage 2a → block side cooling water passage 2b → mechanical water pump 10 → third cooling water passage 8 → fourth heater hose 11d → first bypass passage 13a → electric water pump 14. Therefore, the heat storage hot water in the heat storage container 15 is stored in the head side cooling water passage 2
a and the block side cooling water passage 2b, so that the internal combustion engine 1 is quickly warmed up.

Returning now to FIG. 9, in S906, the ECU
39 activates a counter: C. This counter: C
Is for measuring the elapsed time from the time when the electric water pump 14 starts to operate.

In S907, the ECU 39 causes the counter:
Measured time of C: It is determined whether C exceeds a predetermined time: T ₁ . The above-mentioned predetermined time: T ₁ is, for example, the head side cooling water channel 2a and the block side cooling water channel 2b of the internal combustion engine 1.
Of these, at least the time required for the cooling water in the head-side cooling water passage 2a to be replaced with the stored hot water from the inside of the heat storage container 15 may be used.

[0107] counter in the S907: C time measured: C is a predetermined time: when it is determined that the T ₁ or less, ECU 39, the counter: C Measurement time: C is the predetermined time: the T ₁ The process of S907 is repeatedly executed until it exceeds the limit. In this case, the time until the time measured by the counter: C exceeds the predetermined time: T ₁ , in other words, the predetermined time from the start of the operation of the electric water pump 14:
In T ₁ , the flow path switching valve 16 shuts off the second heater hose 11b, so that the heat storage hot water in the heat storage container 15 is supplied to the internal combustion engine 1 during that time.

After that, the measurement time of the counter: C: C
For a predetermined time: T ₁ , the ECU 39 causes the above S9
07: Counter: C measurement time: C is a predetermined time:
When it is determined that T ₁ is exceeded, the process proceeds to S908.

In S908, the ECU 39 determines whether or not the heater switch 42 is on.

In S908, the heater switch 42
If it is determined that the switch is on, the ECU 39 determines that the S9
In step 09, the flow path switching valve 16 is controlled to shut off the first heater hose 11a. That is, the ECU 39
The flow path switching valve 16 is controlled to switch from the state in which the second heater hose 11b is cut off to the state in which the first heater hose 11a is cut off.

In this case, as described in the description of FIG. 6 above, the electric water pump 14 → the second bypass passage 1
3b → heat storage container 15 → third bypass passage 13c → flow passage switching valve 16 → second heater hose 11b → heater core 12 →
Since the circulation circuit in which the cooling water flows is established in the order of the third heater hose 11c → the first bypass passage 13a → the electric water pump 14, the heat storage hot water in the heat storage container 15 is supplied to the heater core 12, and thus the heat storage hot water in the heater core 12 is stored. Will be transferred to the room heating air.

Returning now to FIG. 9, in S910, the ECU
Reference numeral 39 determines whether or not the measurement time C of the counter C exceeds a predetermined time Tmax set in advance. The above-mentioned predetermined time: Tmax, all the cooling water in the heat storage container 15 is replaced from the start of the operation of the electric water pump 14 (all the heat storage hot water stored in the heat storage container 15 is discharged from the heat storage container 15). ) Is the time determined based on the time required until.

When it is determined in S910 that the measurement time of the counter: C is equal to or less than the predetermined time: Tmax, the ECU 39 executes the process of S910 until the measurement time of the counter: C exceeds the predetermined time: Tmax. Is repeatedly executed.

When it is determined in S910 that the measurement time of the counter: C exceeds the predetermined time: Tmax, the ECU 39 proceeds to S911, stops the operation of the electric water pump 14, and executes this routine. To finish.

If it is determined in step S908 that the heater switch 42 is off, the ECU 3
9 skips the processing of S909 and S910 and skips S9.
11, the operation of the electric water pump 14 is stopped, and then the execution of this routine is ended.

By the ECU 39 thus executing the cooling water flow switching control routine, the heat storage hot water is supplied from the heat storage container 15 to the internal combustion engine 1 and the heat storage hot water is supplied from the heat storage container 15 to the heater core 12 by electric water. Since the switching is performed according to the elapsed time from the start of the operation of the pump 14, both the internal combustion engine 1 and the heater core 12 (air for indoor heating) are heated appropriately.

In particular, in the present embodiment, the internal combustion engine 1 is first warmed by the stored hot water stored in the thermal storage container 15, and then the heater core 12 (air for indoor heating) is warmed up, so that the internal combustion engine 1 is started. It is also possible to improve the indoor heating performance while improving the heat dissipation and exhaust emission.

In the present embodiment, the example in which the cooling water flow switching control routine is executed with the ignition switch 32 switched from off to on has been described, but the door of the driver's seat of the automobile is opened and closed. It may be executed by triggering that the driver is seated in the driver's seat of the automobile or the like.

Further, in the present embodiment, the heater core 12 has been described as an example of the engine-related element according to the present invention, but the heat generated between the lubricating oil of the transmission (hereinafter referred to as transmission oil) and the cooling water. It may be a mission oil cooler for replacement.

When the internal combustion engine 1 is in a cold state, the transmission oil also has a low temperature, so that the viscosity of the transmission oil is high and the torque required when the internal combustion engine 1 operates the transmission tends to be high. . When the torque required when the internal combustion engine 1 operates the transmission increases, the fuel consumption rate of the internal combustion engine 1 deteriorates.

Therefore, if the internal combustion engine 1 and the transmission oil cooler (transmission oil) are sequentially warmed by the stored hot water stored in the thermal storage container 15, the exhaust emission and the fuel consumption rate of the internal combustion engine 1 can be optimized. It is possible to improve.

Further, in the present embodiment, the case where the flow direction of the cooling water by the mechanical water pump and the flow direction of the cooling water by the electric water pump are opposite to each other has been taken as an example. May be the same, and in that case, in the internal combustion engine 1, the mechanical water pump 10 and the electric water pump 14 are arranged so that the cooling water flows in the order of the block side cooling water passage 2b to the head side cooling water passage 2a. Alternatively, in the internal combustion engine 1, the mechanical water pump 10 and the electric water pump 14 may be arranged so that the cooling water flows in the order of the head side cooling water passage 2a and the block side cooling water passage 2b.

<Second Embodiment> Next, a second embodiment of the internal combustion engine equipped with the heat storage device according to the present invention will be described with reference to FIG.
~ It demonstrates based on FIG. Here, the first
The configuration different from the embodiment will be described, and the description of the same configuration will be omitted.

FIG. 10 is a diagram showing a schematic configuration of the cooling water circulation system of the internal combustion engine 1 in the present embodiment. The difference between the above-described first embodiment and this embodiment is that the internal combustion engine provided with the heat storage device according to the first embodiment is either a heater core or a mission oil cooler as an engine-related element according to the present invention. Although only one is provided, the internal combustion engine provided with the heat storage device in the present embodiment is provided with both the heater core and the mission oil cooler as the engine-related elements according to the present invention.

Specifically, the flow path switching valve 16 includes a first heater hose 11a, a second heater hose 11b, and a third heater hose 11b.
In addition to the bypass passage 13c, the first transmission cooling water passage 43a is connected, and the passage switching valve 16 is configured to shut off at least one passage of the above-mentioned four passages.

The first oil cooler passage 43a is connected to the cooling water inlet of the heat exchanger 44. The heat exchanger 44 exchanges heat between lubricating oil (transmission oil) of a transmission (not shown) connected to the internal combustion engine 1 and cooling water.

A second outlet is provided at the cooling water outlet of the heat exchanger 44.
Transmission cooling water passage 43b is connected, and the second transmission cooling water passage 43b is connected to the confluence of the third heater hose 11c, the fourth heater hose 11d, and the first bypass passage 13a.

With respect to the cooling water circulation system thus configured, the ECU 39 executes the cooling water flow switching control according to the following procedure.

First, when the internal combustion engine 1 is in the operating state, the mechanical water pump 10 operates by receiving the rotational torque of the crankshaft.
The flow path switching valve 16 is controlled to shut off the heater hose 11b, and the electric water pump 14 is controlled to a stopped state.

In this case, the electric water pump 14 does not operate, but only the mechanical water pump 10 operates, and if the temperature of the cooling water at that time is less than the valve opening temperature of the thermostat valve 7: Temp1. The thermostat valve 7 closes the second cooling water passage 6 and simultaneously opens the bypass water passage 9.

Therefore, the internal combustion engine 1 is in operation, and the temperature of the cooling water is the temperature at which the thermostat valve 7 opens:
When it is less than Temp1, as shown in FIG. 11, mechanical water pump 10 → block side cooling water channel 2b → head side cooling water channel 2a → bypass water channel 9 → thermostat valve 7 → third cooling water channel 8 → mechanical water pump 10
A circulation circuit in which cooling water flows is established in this order.

When the circulation circuit as shown in FIG. 11 is established, relatively low temperature cooling water flowing out from the internal combustion engine 1 bypasses the radiator 5, so that the cooling water is not needed by the radiator 5. It will not be cooled.
As a result, the warm-up of the internal combustion engine 1 is not hindered.

After that, the warm-up of the internal combustion engine 1 is completed, and the temperature of the cooling water becomes the opening temperature of the thermostat valve 7: Tem.
When p1 or more, the thermostat valve 7 opens the second cooling water passage 6 and at the same time shuts off the bypass water passage 9.

That is, the internal combustion engine 1 is in operation and the temperature of the cooling water is the temperature at which the thermostat valve 7 is opened: T
When it is equal to or more than emp1, as shown in FIG. 12, the mechanical water pump 10 → the block side cooling water passage 2b → the head side cooling water passage 2a → the first cooling water passage 4 → the radiator 5 → the second
Cooling water channel 6 → Thermostat valve 7 → Third cooling water channel 8
→ A circulation circuit through which cooling water flows is established in the order of the mechanical water pump 10.

When the circulation circuit as shown in FIG. 12 is established, relatively high temperature cooling water flowing out from the internal combustion engine 1 flows through the radiator 5, so that the heat of the cooling water is radiated by the radiator 5. It In this case, the cooling water having a relatively low temperature after being radiated by the radiator 5 is the head side cooling water channel 2a and the block side cooling water channel 2 of the internal combustion engine 1.
Since it flows into b, the heat of the internal combustion engine 1 is transferred to the cooling water. As a result, overheating of the internal combustion engine 1 is prevented.

Further, the internal combustion engine 1 is in the operating state, and the temperature of the cooling water is the opening temperature of the thermostat valve 7: Tem.
When the heater switch 42 is turned on when p1 or more, the ECU 39 maintains the electric water pump 14 in the stopped state, and shuts off the third bypass passage 13c and the first transmission cooling water passage 43a. First heater hose 11a and second heater hose 11b
The flow path switching valve 16 is controlled so as to make the electric conduction.

In this case, as shown in FIG. 13, the same circulation circuit as the circulation circuit described in the description of FIG. 12 is established, and at the same time, the mechanical water pump 10 → block side cooling water passage 2b → head side cooling water passage. 2a → first cooling water passage 4 → first heater hose 11a → flow passage switching valve 16 → second heater hose 11b → heater core 12 → third heater hose 11c → fourth heater hose 11d → third cooling water passage 8 → mechanical water A circulation circuit in which cooling water flows is established in the order of the pump 10.

When the circulation circuit as shown in FIG. 13 is established, the relatively high temperature cooling water flowing out from the internal combustion engine 1 flows into the heater core 12, so that the heat of the cooling water in the heater core 12 becomes indoors. It will be transmitted to the heating air. As a result, the indoor heating air is warmed.

Further, the internal combustion engine 1 is in the operating state, and the temperature of the cooling water is the opening temperature of the thermostat valve 7: Tem.
When it is necessary to warm or cool the transmission oil when p1 or more, the ECU 39 maintains the electric water pump 14 in a stopped state, and
The flow path switching valve 16 is controlled so that the second heater hose 11b and the third bypass passage 13c are shut off and the first heater hoses 11a and 43a are made conductive.

In this case, as shown in FIG. 14, the same circulation circuit as the circulation circuit described in the explanation of FIG. 12 is established, and at the same time, the mechanical water pump 10 → block side cooling water passage 2b → head side cooling water passage. 2a → first cooling water passage 4 → first heater hose 11a → flow passage switching valve 16 → first transmission cooling water passage 43a → heat exchanger 44 →
A circulation circuit in which the cooling water flows is formed in the order of the second transmission cooling water passage 43b → the fourth heater hose 11d → the third cooling water passage 8 → the mechanical water pump 10.

When the circulation circuit as shown in FIG. 14 is established, the cooling water flowing out from the internal combustion engine 1 is cooled by the heat exchanger 44.
Since heat is circulated, heat is exchanged between the cooling water and the transmission oil. As a result, the transmission oil is heated or cooled by the cooling water.

Further, when the internal combustion engine 1 is in operation and the temperature of the cooling water is the temperature at which the thermostat valve 7 is opened: Tem
When it is necessary to heat or cool the transmission oil and the heater switch 42 is turned on when p1 or more, the ECU 39 maintains the electric water pump 14 in a stopped state and shuts off the third bypass passage 13c. In addition, the passage switching valve 16 is controlled so that the first heater hose 11a, the second heater hose 11b, and the first transmission cooling water passage 43a are electrically connected.

In this case, as shown in FIG. 15, the circulation circuit described in the description of FIG. 12, the circulation circuit described in the description of FIG. 13, and the circulation circuit described in the description of FIG. 14 are established. It will be.

As a result, since the cooling water flowing out from the internal combustion engine 1 flows through the heater core 12 and the heat exchanger 44, the heat of the cooling water is transferred to the indoor heating air in the heater core 12 and the heat exchange is performed. Heat is exchanged between the cooling water and the transmission oil in the container 44, so that the temperature of the room heating air is raised and the transmission oil is heated or cooled.

On the other hand, when the internal combustion engine 1 is cold started or is in a cold state immediately after starting, the temperature of the wall surface of the intake port and the wall surface of the combustion chamber becomes low, so that the fuel injected from the fuel injection valve Hard to vaporize. For this reason, the fuel injected from the fuel injection valve easily adheres to the wall surface of the intake port and the wall surface of the combustion chamber, making it difficult to form a highly combustible mixture. Furthermore, when the internal combustion engine 1 is in the cold state, the temperature in the cylinder (combustion chamber) at the top dead center of the compression stroke (so-called compression end temperature) also becomes low, so that it becomes difficult for the fuel to ignite and burn.

As described above, when it is difficult to form a highly combustible mixture in the internal combustion engine 1 and it becomes difficult to ignite and burn the fuel, the startability is lowered, the combustion stability is lowered, or the emission amount of unburned fuel components is increased. This causes deterioration of exhaust emission.

Therefore, when the internal combustion engine 1 is in the cold state, the flow passage switching valve 16 is controlled so as to shut off the second heater hose 11b and the first transmission cooling water passage 43a, and the electric water pump 14 is turned on. By operating the electric water pump 14, the second bypass passage 13b, the heat storage container 15, the third bypass passage 13c, the flow passage switching valve 16, the first heater hose 11a, and the first cooling water passage 4 as shown in FIG. → Head side cooling water channel 2a →
Block side cooling water passage 2b → mechanical water pump 10
A method of establishing a circulation circuit in which cooling water flows in the order of the third cooling water passage 8 → the fourth heater hose 11d → the first bypass passage 13a → the electric water pump 14 can be considered.

When the circulation circuit as shown in FIG. 16 is established, the heat storage hot water in the heat storage container 15 sequentially flows into the first bank 1a and the second bank 1b of the internal combustion engine 1, and in lieu thereof, in the head side cooling water passage 2a. The low-temperature cooling water originally stored in the block-side cooling water passage 2b is discharged from the head-side cooling water passage 2a and the block-side cooling water passage 2b.

In this case, the heat of the stored hot water is transmitted to the cylinder head 1a and the cylinder block 1b of the internal combustion engine 1,
The cylinder head 1a and the cylinder block 1b are warmed.

As a result, the wall temperature of the intake port (not shown) of the cylinder head 1a, the wall temperature of the combustion chamber, and the like rapidly rise, so that the startability is improved, the warm-up operation time is shortened, and the exhaust emission is improved. .

Further, when the internal combustion engine 1 is in a cold state, the temperature of the cooling water also becomes low, so that it becomes difficult to sufficiently warm the indoor heating air, and it is impossible to obtain the desired heating performance. Becomes Therefore, in order to obtain a desired heating performance when the internal combustion engine 1 is in the cold state, the heater core 1
It is necessary to raise the temperature of the cooling water flowing through 2.

On the other hand, when the internal combustion engine 1 is in the cold state and the heater switch 42 is on, the first heater hose 11a and the first transmission cooling water passage 43a are shut off, and the second heater hose 11b. Third
By controlling the flow path switching valve 16 so as to make the bypass passage 13c conductive and operating the electric water pump 14, as shown in FIG. 17, the electric water pump 14 → second bypass passage 13b → heat storage container 15 →
Third bypass passage 13c → flow passage switching valve 16 → second heater hose 11b → heater core 12 → third heater hose 11
c → first bypass passage 13a → electric water pump 1
A method of establishing a circulation circuit in which cooling water flows in the order of 4 can be considered.

When the circulation circuit as shown in FIG. 17 is established, the heat storage hot water stored in the heat storage container 15 flows through the heater core 12, so that the heat of the heat storage hot water flows through the heater core 12 into the room heating air. The air for indoor heating is appropriately warmed.

Further, when the internal combustion engine 1 is in a cold state, the transmission oil is in a low temperature and highly viscous state. Therefore, the torque required when the internal combustion engine 1 operates the transmission is high in the transmission oil. It becomes higher than when the viscosity is low.
When the torque required when the internal combustion engine 1 operates the transmission increases in this way, the fuel consumption rate of the internal combustion engine 1 may deteriorate.

Therefore, when the internal combustion engine 1 is in a cold state, the viscosity of the transmission oil is lowered by warming the transmission oil, so that the torque required when the internal combustion engine 1 operates the transmission is reduced. It is preferable to lower it.

Therefore, when the internal combustion engine 1 is in a cold state, the first heater hose 11a and the second heater hose 11 are
As shown in FIG. 18, by controlling the flow path switching valve 16 so as to shut off b and connect the third bypass passage 13c and the first transmission cooling water passage 43a, the electric water pump 14 is operated. Electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → first transmission cooling water passage 43a → heat exchanger 44 → second transmission cooling water passage 43b → first bypass passage 13a → A method of establishing a circulation circuit in which the cooling water flows in the order of the electric water pump 14 can be considered.

When the circulation circuit as shown in FIG. 18 is established, the heat storage hot water stored in the heat storage container 15 flows through the heat exchanger 44, so that the heat of the heat storage hot water passes through the heat exchanger 44. Transmitted to the transmission oil,
The transmission oil will be warmed up.

When the transmission oil is warmed in this way, the viscosity of the transmission oil decreases, so the torque required when the internal combustion engine 1 operates the transmission decreases. As a result, the deterioration of the fuel consumption rate of the internal combustion engine 1 is prevented.

By the way, when the internal combustion engine 1 is in the cold state and the circulation circuit as described in the explanation of FIG. 16 is established, the startability, combustion stability and exhaust emission of the internal combustion engine 1 are improved. However, it is difficult to improve the indoor heating performance and the fuel consumption rate of the internal combustion engine 1, and the indoor heating performance is improved when the circulation circuit as described in the above description of FIG. 17 is established. However, it becomes difficult to improve the startability, combustion stability, exhaust emission, and fuel consumption rate of the internal combustion engine 1, and the circulation circuit as described in the explanation of FIG. 18 described above is established. Although it is possible to improve the fuel consumption rate of the internal combustion engine 1, it is possible to improve the startability, combustion stability, exhaust emission of the internal combustion engine 1, and improve the indoor heating performance. It is difficult.

Therefore, in the cooling water flow switching control in the present embodiment, the ECU 39 determines that when the internal combustion engine 1 is in the cold state and the heater switch 42 is in the on state.
Supply of heat storage hot water to the internal combustion engine 1 and the heater core 12
The heat storage hot water supply to the heat exchanger 44 and the heat storage hot water supply to the heat exchanger 44 are switched according to the elapsed time from the start of the operation of the electric water pump 14.

[0161] More specifically, ECU 39, as shown in FIG. 19, a predetermined time from the actuation start time of the electric water pump 14: T ₁ is conducting a first heater hose 11a and the third bypass passage 13c (the By controlling the flow path switching valve 16 so as to shut off the two heater hose 11b and the second transmission cooling water passage 43b), the circulation circuit as described in the explanation of FIG. 16 is established, and the predetermined time: Predetermined time from the time when T ₁ has elapsed: In T ₂ , a flow path for connecting the second heater hose 11b and the third bypass passage 13c to each other (cutting off the first heater hose 11a and the first transmission cooling water passage 43a) Switching valve 1
6 passed a circulating circuit as described in the explanation of Figure 17 described above by controlling, the above-mentioned predetermined time: After T ₂ has elapsed and the third bypass passage 13c and the first transmission cooling water passage 43a The circulation circuit as described above with reference to FIG. 18 may be established by controlling the flow path switching valve 16 so as to conduct (conduct the first heater hose 11a and the second heater hose 11b).

[0162] In this case, the heat storage hot water for a predetermined time from the actuation start time of the electric water pump 14: warmed T ₁ in the internal combustion engine 1, the above-mentioned predetermined time: given from the time of T ₁ is elapsed time: T in ₂ Heats the heater core 12 (air for indoor heating) and further heats the heat exchanger 44 (transmission oil) after the lapse of the predetermined time T ₂ .

The stored hot water is stored in the internal combustion engine 1 and the heater core 1.
The order of heating 2 and the heat exchanger 44 is not limited to the order described in the description of FIG. 19, and may be determined according to the usage environment of the vehicle to which the present invention is applied. However, the transmission oil is harder to warm up than the cooling water, and even if it is warmed after the internal combustion engine 1 and the heater core 12, a sufficient effect can be obtained. And heater core 12
It is preferable to preferentially heat the.

Hereinafter, the cooling water flow switching control when the internal combustion engine 1 is in the cold state will be specifically described with reference to FIG. Here, the cooling water flow switching control when the stored hot water warms the internal combustion engine 1, the heater core 12, and the heat exchanger 44 in this order will be described.

FIG. 20 is a flow chart showing a cooling water flow switching control routine at the time of starting the internal combustion engine 1. The cooling water flow switching control routine is a routine stored in advance in the ROM of the ECU 39, and is a routine that the ECU 39 executes when the ignition switch 40 is switched from off to on.

In the cooling water flow switching control routine, the ECU
First, 39 determines whether or not the ignition switch has been switched from off to on in S2001.

If it is determined in S2001 that the ignition switch has not been switched from off to on, the ECU 39 ends the execution of this routine.

On the other hand, if it is determined in S2001 that the ignition switch has been switched from OFF to ON, the ECU 39 proceeds to S2002 and inputs the output signal value of the second water temperature sensor 18 (engine side water temperature): THW. .

In S2003, the ECU 39 causes the S2
It is determined whether the engine side water temperature THW input in 002 is less than the predetermined temperature Tbase.

In S2003, the engine side water temperature:
If it is determined that THW is above the predetermined temperature, E
The CU 39 determines that it is not necessary to warm the internal combustion engine 1, the heater core 12 (air for indoor heating), and the heat exchanger 44 (transmission oil), and ends the execution of this routine. However, even if the temperature of the cooling water is sufficiently high, the temperature of the transmission oil may be low. Therefore, the ECU 39 establishes the circulation circuit as described in the description of FIG. You may make it warm only.

In S2003, the engine side water temperature:
If it is determined that THW is lower than the above predetermined temperature, E
The CU 39 proceeds to S2004 and moves to the first heater hose 11
a and the third bypass passage 13c are electrically connected (the second heater hose 11b and the first transmission cooling water passage 43a).
The flow path switching valve 16 is controlled so as to shut off the valve.

In S2005, the ECU 39 applies drive power to the electric water pump 14 to operate the electric water pump 14.

In this case, as described in the description of FIG. 16 described above, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → passage switching valve 16 → first heater hose 11a. → 1st cooling water channel 4
→ head side cooling water passage 2a → block side cooling water passage 2b → mechanical water pump 10 → third cooling water passage 8 → fourth heater hose 11d → first bypass passage 13a → electric water pump 14 Therefore, the heat storage hot water in the heat storage container 15 is supplied to the head side cooling water passage 2a and the block side cooling water passage 2b, so that the internal combustion engine 1 is quickly warmed.

Now, returning to FIG. 20, in S2006, E
The CU 39 activates the counter C. This counter: C measures the elapsed time from the time when the electric water pump 14 starts to operate.

In S2007, the ECU 39 causes the count
Time: C is measured: C is predetermined time: T ₁Whether or not
To determine. The predetermined time mentioned above: T₁For example, internal combustion
Head side cooling water passage 2a and block side cooling water passage of the engine 1
2b, at least the cooling water in the head side cooling water passage 2a
Is required before it is replaced with the hot water stored in the heat storage container 15.
It may be time to do.

In the step S2007, the counter: the total of C
Time measurement: C is the predetermined time: T₁EC if:
U39 is a counter: C measurement time: C is the predetermined time
Between: T ₁Repeat the process of S2007 until the value exceeds
Run. In this case, the counter: C measurement time is at a predetermined time
Between: T₁Period, in other words, electric train
The predetermined time from the start of the operation of the motor pump 14: T₁Within
The flow path switching valve 16 is connected to the first heater hose 11a and the third bar.
In order to establish electrical connection with the Y-pass passage 13c, heat storage capacity is maintained between them.
The stored hot water in the vessel 15 is supplied to the internal combustion engine 1.
It

After that, the measurement time of the counter: C: C
Is the predetermined time: T₁When the value exceeds S2, the ECU 39 causes the S2 to
In 007, counter: C measurement time: C is a predetermined time
Between: T ₁It is determined that the value exceeds the limit, and the process proceeds to S2008.

In S2008, the ECU 39 determines whether or not the heater switch 42 is on.

In S2008, the heater switch 4
If it is determined that No. 2 is on, the ECU 39 determines that S
Proceeding to 2009, the second heater hose 11b and the third bypass passage 13c are electrically connected (the first heater hose 11a and the first heater hose 11a).
The flow path switching valve 16 is controlled to shut off the transmission cooling water passage 43a.

In this case, as described in the explanation of FIG. 17, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → passage switching valve 16 → second heater hose 11b. → heater core 12
→ third heater hose 11c → first bypass passage 13a →
Since the circulation circuit through which the cooling water flows in the order of the electric water pump 14 is established, the heat storage hot water in the heat storage container 15 is supplied to the heater core 12, so that the heat of the heat storage hot water is transferred to the room heating air in the heater core 12. become.

Now, returning to FIG. 20, in S2010, E
In the CU 39, the counter: C measurement time: C is a predetermined time:
T₁+ T₂It is determined whether or not the value exceeds. Here, at a predetermined time
Between: T ₂Is, for example, the cooling water in the heater core 12 stores heat.
Time required to replace hot water from the container 15
May be

In S2010, if the counter: C measurement time: C is less than or equal to the predetermined time: T ₁ + T ₂ ,
The ECU 39 repeatedly executes the processing of S2010 until the time measured by the counter C: C exceeds the predetermined time T ₁ + T ₂ . In this case, the predetermined aforementioned time: T ₁ predetermined time from the time that has elapsed: the T ₂ are, flow path switching valve 16
Since the second heater hose 11b and the third bypass passage 13c are electrically connected, the heat storage hot water in the heat storage container 15 is supplied to the heater core 12 during that time.

After that, the measurement time of the counter: C: C
When the predetermined time: T ₁ + T ₂ is exceeded, the ECU 39 determines in S2010 that the measurement time C of the counter C is over the predetermined time: T ₁ + T ₂ , and proceeds to S2011.

In S2011, the ECU 39 controls the flow passage switching valve 16 so that the third bypass passage 13c and the first transmission cooling water passage 43a are electrically connected (the first heater hose 11a and the second heater hose 11b are cut off). To do.

In this case, as described in the description of FIG. 18 above, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → passage switching valve 16 → for first transmission Cooling water channel 43
Since the circulation circuit in which the cooling water flows is established in the order of a → heat exchanger 44 → second transmission cooling water passage 43b → first bypass passage 13a → electric water pump 14, the heat storage hot water in the heat storage container 15 becomes heat exchanger. The heat of the stored hot water is supplied to the transmission oil in the heat exchanger 44.

Now, returning to FIG. 20, in S2012, E
In the CU 39, the counter: C measurement time: C is a predetermined time:
It is determined whether or not Tmax is exceeded. The predetermined time mentioned above:
For Tmax, all the cooling water in the heat storage container 15 is replaced from the start of the operation of the electric water pump 14 (the heat storage container 15
This is the time determined based on the time required until all the heat storage hot water stored therein is discharged from the inside of the heat storage container 15.

When it is determined in S2012 that the measurement time of the counter: C is less than or equal to the predetermined time: Tmax, the ECU 39 executes the process of S2012 until the measurement time of the counter: C exceeds the predetermined time: Tmax. Is repeatedly executed.

When it is determined in S2012 that the measurement time of the counter C has exceeded the predetermined time Tmax, the ECU 39 proceeds to S2013, stops the operation of the electric water pump 14, and then executes this routine. Finish execution.

If it is determined in S2008 that the heater switch 42 is off, the ECU
In 39, the processing of S2009 to S2012 is skipped, the processing proceeds to S2013, the operation of the electric water pump 14 is stopped, and then the execution of this routine is ended.

By thus executing the cooling water flow switching control routine by the ECU 39, the heat storage hot water is supplied from the heat storage container 15 to the internal combustion engine 1, the heat storage hot water is supplied from the heat storage container 15 to the heater core 12, and the heat storage is carried out. Since the supply of the stored hot water from the container 15 to the heat exchanger 44 is switched according to the elapsed time from the start of the operation of the electric water pump 14, the internal combustion engine 1, the heater core 12 (air for indoor heating) and the heat exchanger. 44 (transmission oil) is heated appropriately.

In particular, in the present embodiment, the internal combustion engine 1 is first warmed by the stored hot water stored in the heat storage container 15, then the heater core 12 (air for indoor heating) is warmed, and the heat exchanger 44 ( Transmission oil)
Since the internal combustion engine 1 is heated, the startability and exhaust emission of the internal combustion engine 1 are improved, and then the indoor heating performance is improved.
The fuel consumption rate can be improved.

<Third Embodiment> Next, a third embodiment of the internal combustion engine equipped with the heat storage device according to the present invention will be described with reference to FIG.
It will be described based on. Here, a configuration different from that of the first embodiment described above will be described, and description of similar configurations will be omitted.

In the above-described first embodiment, the heat storage hot water in the heat storage container 15 can be selectively supplied to the internal combustion engine 1 and the heater core 12 in accordance with the elapsed time from the start of the supply of the heat storage hot water. Internal combustion engine 1 and heater core 12
Although the example in which the stored hot water is sequentially supplied to the heat storage hot water is described above, in the present embodiment, the stored hot water is supplied to one of the internal combustion engine 1 and the heater core 12 depending on the temperature of the internal combustion engine 1 at the start of supplying the stored hot water. An example of supply will be described.

In the cooling water flow switching control according to the present embodiment, the ECU 39 obtains the temperature of the internal combustion engine 1 when the supply of the heat storage hot water is started, that is, when the operation of the electric water pump 14 is started.

At this time, as a method of obtaining the temperature of the internal combustion engine 1, there is a method of attaching a temperature sensor to the cylinder head 1a or the cylinder block 1b of the internal combustion engine 1, and a correlation with the temperature of the internal combustion engine 1 among the existing temperature sensors. A method of substituting the output signal value of the temperature sensor for detecting the temperature can be exemplified.

The temperature correlated with the temperature of the internal combustion engine 1 is the temperature of the cooling water circulating in the internal combustion engine 1, the temperature of the lubricating oil (engine oil) of the internal combustion engine 1, the intake air temperature of the internal combustion engine 1, or the outside air. The temperature and the like can be exemplified.
In the internal combustion engine 1 in the present embodiment, the second water temperature sensor 1 for detecting the temperature of the cooling water circulating in the internal combustion engine 1
8 already exists, the engine side water temperature THW detected by the second water temperature sensor 18 is used as the temperature of the internal combustion engine 1.

The ECU 39 uses the electric water pump 14
When the engine side water temperature: THW is very low (for example, less than 0 ° C.) at the start of the operation, the heat storage hot water in the heat storage container 15 is supplied to the heater core 12, and the engine side water temperature: TH
When W is room temperature (for example, 0 ° C. or higher and 40 ° C. or lower), the stored hot water in the heat storage container 15 may be supplied to the internal combustion engine 1.

This is because the heat storage hot water stored in the heat storage container 15 is finite, but the heat capacity of the internal combustion engine 1 is relatively large, so the temperature of the internal combustion engine 1 (engine side water temperature:
This is because it is difficult to sufficiently heat the internal combustion engine 1 even if the stored hot water in the heat storage container 15 is supplied to the internal combustion engine 1 when THW) is extremely low.

The cooling water flow switching control in this embodiment will be described below with reference to FIG. FIG. 21 is a flowchart showing a cooling water flow switching control routine when the internal combustion engine 1 is in the cold state. The cooling water flow switching control routine is a routine stored in advance in the ROM of the ECU 39, and the ECU is triggered by the ignition switch 40 being switched from OFF to ON.
39 is a routine to be executed.

In the cooling water flow switching control routine, the ECU
First, 39 determines whether or not the ignition switch is switched from OFF to ON in S2101.

If it is determined in S2101 that the ignition switch has not been switched from off to on, the ECU 39 ends the execution of this routine.

On the other hand, if it is determined in S2101 that the ignition switch has been switched from OFF to ON, the ECU 39 proceeds to S2102 and inputs the output signal value of the second water temperature sensor 18 (engine side water temperature): THW. .

In S2103, the ECU 39 causes the S2
At 102, it is determined whether the engine side water temperature THW input is equal to or higher than a first predetermined temperature thw1 (for example, 0 ° C.).

In S2103, the engine side water temperature:
If it is determined that THW is lower than the above predetermined temperature, E
Since the temperature of the internal combustion engine 1 is extremely low, the CU 39 determines that it is difficult to raise the temperature of the internal combustion engine 1 to the desired temperature range only with the hot water stored in the heat storage container 15, and proceeds to S2104.

In step S2104, the ECU 39 controls the flow passage switching valve 16 to shut off the first heater hose 11a and connect the second heater hose 11b to the third bypass passage 13c.

The ECU 39, which has finished executing the above-described processing of S2104, proceeds to S2107, and applies drive power to the electric water pump 14 to operate the electric water pump 14.

In this case, as described in the description of FIG. 6 in the above-mentioned first embodiment, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → flow passage switching valve. Since the circulation circuit in which the cooling water flows is established in the order of 16 → second heater hose 11b → heater core 12 → third heater hose 11c → first bypass passage 13a → electric water pump 14, the heat storage container 1
The heat storage hot water in 5 is supplied to the heater core 12, and the heat of the heat storage hot water is transferred to the indoor heating air in the heater core 12. As a result, the passenger compartment of the vehicle is quickly warmed, and the passenger compartment can be heated to a temperature suitable for driving.

Returning now to FIG. 21, in S2108, E
The CU 39 activates the counter C. This counter: C measures the elapsed time from the time when the electric water pump 14 starts to operate.

In step S2109, the ECU 39 causes the counter: C to measure time: C for a predetermined time: Tma
Determine whether or not x has been exceeded. The predetermined time mentioned above: Tmax
Is the time required from the start of operation of the electric water pump 14 until all of the cooling water in the heat storage container 15 is replaced (all the heat storage hot water stored in the heat storage container 15 is discharged from the heat storage container 15). It is a time determined based on the above.

When it is determined in S2109 that the counter: C measurement time: C is within the predetermined time: Tmax, the ECU 39 determines that the counter: C measurement time:
Until C exceeds the predetermined time: Tmax, the relevant S2109
The process of is repeatedly executed.

If it is determined in step S2109 that the counter C measurement time: C exceeds the predetermined time Tmax, the ECU 39 proceeds to step S2110 to stop the operation of the electric water pump 14 and then complete the operation. Terminates the routine execution.

If it is determined in S2103 that the engine side water temperature: THW is equal to or higher than the first predetermined temperature: thw1 (for example, 0 ° C.), the ECU 39 determines in S210.
5, the engine side water temperature: THW is determined whether or not the first predetermined temperature: thw1 or more and the second predetermined temperature (for example, 40 ° C.): thw2 or less (thw1 ≦ THW ≦ thw2).

At S2105, the engine side water temperature: THW
Is the first predetermined temperature: thw1 or more and the second predetermined temperature: thw2
When it is determined that it is the following, that is, the engine side water temperature:
If it is determined that THW is in the normal temperature range, the ECU 39
Is considered to be capable of raising the temperature of the internal combustion engine 1 to a desired temperature range only with the stored hot water in the heat storage container 15, and S
Proceed to 2106.

At S2106, the ECU 39 controls the flow passage switching valve 16 so as to shut off the second heater hose 11b and connect the first heater hose 11a and the third bypass passage 13c.

The ECU 39, which has finished executing the above-described processing of S2106, proceeds to S2107, and applies drive power to the electric water pump 14 in order to operate the electric water pump 14.

In this case, as described in the description of FIG. 5 in the above-mentioned first embodiment, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → flow passage switching valve. 16 → first heater hose 11a → first cooling water channel 4 → head side cooling water channel 2a → block side cooling water channel 2b → mechanical water pump 10 → third cooling water channel 8 → fourth heater hose 11d → first bypass channel 13a → Since the circulation circuit in which the cooling water flows is established in the order of the electric water pump 14, the heat storage hot water in the heat storage container 15 contains the head side cooling water channel 2a and the block side cooling water channel 2.
b is supplied to the internal combustion engine 1, so that the internal combustion engine 1 is quickly warmed.

Now, returning to FIG. 21, when the ECU 39 finishes executing the process of S2107, the ECU 39 executes the above-mentioned S210.
After executing the same processing as 8 to S2110, the execution of this routine ends.

When it is determined in S2105 that the engine side water temperature: THW is not equal to or higher than the first predetermined temperature: thw1 and equal to or lower than the second predetermined temperature: thw2, that is, the engine side water temperature: THW is The second predetermined temperature: thw2
When it is determined that the temperature is higher, the temperature of the intake port wall surface and the combustion chamber wall surface of the internal combustion engine 1 is sufficiently high, and the amount of heat required for the cooling water to warm the indoor heating air is sufficient. Therefore, the execution of this routine is terminated.

As described above, when the supply destination of the heat storage hot water is determined according to the temperature of the internal combustion engine 1 (engine side water temperature: THW) at the time of starting the supply of the heat storage hot water, the finite heat storage hot water stored in the heat storage container 15 is set. Internal combustion engine 1 and heater core 1
2 (room heating device) can be reliably heated.

Therefore, according to the cooling water flow switching control according to the present embodiment, the internal combustion engine provided with the heat storage device capable of supplying the stored hot water in the heat storage container 15 to either one of the internal combustion engine 1 and the heater core 12. In, at least one of the internal combustion engine 1 and the heater core 12 is suitably warmed.

In the present embodiment, the heater core 12 is taken as an example of the engine-related element according to the present invention, but the heat generated between the lubricating oil of the transmission (hereinafter referred to as the transmission oil) and the cooling water. It may be a mission oil cooler for replacement.

Further, in the cooling water flow switching control in the present embodiment, an example in which the operation stop timing of the electric water pump 14 is determined based on the measurement time of the counter C has been described, but the temperature of the room heating air or The operation stop timing of the electric water pump 14 may be determined based on the temperature of the internal combustion engine 1 (engine-side water temperature: THW). For example, the operation of the electric water pump 14 may be stopped when the temperature of the room heating air or the internal combustion engine 1 rises to a predetermined temperature, or the temperature of the room heating air or the internal combustion engine 1 may be changed to the electric water. The operation of the electric water pump 14 may be stopped when a predetermined temperature rises from the temperature at the start of the operation of the pump 14.

<Fourth Embodiment> Next, a fourth embodiment of the internal combustion engine equipped with the heat storage device according to the present invention will be described with reference to FIG.
It will be described based on. Here, a configuration different from that of the second embodiment described above will be described, and description of similar configurations will be omitted.

In the above-described second embodiment, in the structure capable of selectively supplying the heat storage hot water in the heat storage container 15 to the internal combustion engine 1, the heater core 12 and the heat exchanger 44, from the start of supply of the heat storage hot water. The example in which the stored hot water is sequentially supplied to the internal combustion engine 1, the heater core 12, and the heat exchanger 44 in accordance with the elapsed time of is described above, but in the present embodiment, the temperature of the internal combustion engine 1 at the start of supply of the stored hot water is Accordingly, an example of supplying the stored hot water to any one of the internal combustion engine 1, the heater core 12, and the heat exchanger 44 will be described.

In the cooling water flow switching control according to the present embodiment, the ECU 39 obtains the temperature of the internal combustion engine 1 at the time of starting the supply of the heat storage hot water, that is, when starting the operation of the electric water pump 14.

At this time, as the temperature of the internal combustion engine 1, the engine side water temperature: THW (the output signal value of the second water temperature sensor 18) can be used.

Here, while the amount of the stored hot water stored in the heat storage container 15 is finite, the temperature of the internal combustion engine 1 is relatively large, so the temperature of the internal combustion engine 1 (engine side water temperature:
When THW) is extremely low, it becomes difficult to sufficiently warm the internal combustion engine 1 even if all the stored hot water in the heat storage container 15 is supplied to the internal combustion engine 1. Therefore, when the temperature of the internal combustion engine 1 (engine side water temperature: THW) is extremely low, the heat storage container 1
It is appropriate that the temperature inside the vehicle compartment is adjusted to a temperature suitable for driving by supplying the heat storage hot water in 5 to the heater core 12.

On the other hand, the temperature of the internal combustion engine 1 (engine side water temperature: TH
When W) is higher than room temperature, the temperatures of the intake port wall surface and the combustion chamber wall surface of the internal combustion engine 1 are sufficiently high, and the cooling water has a sufficient amount of heat to warm the indoor heating air. However, since the engine side water temperature: THW is high, it is assumed that the transmission oil will be low after the internal combustion engine 1 is operated at a low load and a low rotation speed.
It is suitable to improve the fuel consumption rate of the internal combustion engine 1 by warming the transmission oil by utilizing the heat storage hot water in the heat storage container 15.

Accordingly, when the engine side water temperature THH at the time of starting the operation of the electric water pump 14 is very low (for example, less than 0 ° C.), the heat storage hot water in the heat storage container 15 is supplied to the heater core 12 and the engine side. When the water temperature: THW is normal temperature (for example, 0 ° C. or higher and 40 ° C. or lower), the stored hot water in the heat storage container 15 is supplied to the internal combustion engine 1, and the engine side water temperature: THW is higher than the normal temperature (for example, Four
In the case of higher than 0 ° C.), it is preferable to supply the heat storage hot water in the heat storage container 15 to the heat exchanger 44.

The cooling water flow switching control in this embodiment will be described below with reference to FIG. FIG. 22 is a flowchart showing a cooling water flow switching control routine when the internal combustion engine 1 is in the cold state. The cooling water flow switching control routine is a routine stored in advance in the ROM of the ECU 39, and the ECU is triggered by the ignition switch 40 being switched from OFF to ON.
39 is a routine to be executed.

In the cooling water flow switching control routine, the ECU
First, 39 determines whether or not the ignition switch has been switched from off to on in S2201.

If it is determined in S2201 that the ignition switch has not been switched from off to on, the ECU 39 ends the execution of this routine.

On the other hand, if it is determined in S2201 that the ignition switch has been switched from OFF to ON, the ECU 39 proceeds to S2202 and inputs the output signal value of the second water temperature sensor 18 (engine side water temperature): THW. .

At S2203, the ECU 39 determines at S2
It is determined whether or not the engine side water temperature THW input in 202 is equal to or higher than a first predetermined temperature: thw1 (for example, 0 ° C.).

In S2203, the engine side water temperature:
When it is determined that THW is lower than the first predetermined temperature, the ECU 39 raises the temperature of the internal combustion engine 1 to the desired temperature range only with the stored hot water in the heat storage container 15 because the temperature of the internal combustion engine 1 is very low. Considering that it is difficult to heat it, S22
Go to 04.

At S2204, the ECU 39 controls the flow passage switching valve 16 so that the second heater hose 11b and the third bypass passage 13c are electrically connected (the first heater hose 11a and the first transmission cooling water passage 43a are cut off). To do.

The ECU 39, which has finished executing the above-described processing of S2204, proceeds to S2208, and applies drive power to the electric water pump 14 to operate the electric water pump 14.

In this case, as described in the description of FIG. 17 in the second embodiment, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third
Bypass passage 13c → flow passage switching valve 16 → second heater hose 11b → heater core 12 → third heater hose 11c →
Since the circulation circuit in which the cooling water flows is established in the order of the first bypass passage 13a → the electric water pump 14, the heat storage hot water in the heat storage container 15 is supplied to the heater core 12, and the heat of the heat storage hot water is heated to the room heating air in the heater core 12. Will be transmitted. As a result, the passenger compartment of the vehicle is quickly warmed, and the passenger compartment can be heated to a temperature suitable for driving.

Now, returning to FIG. 22, in S2209, E
The CU 39 activates the counter C. This counter: C measures the elapsed time from the time when the electric water pump 14 starts to operate.

In S2210, the ECU 39 causes the counter: C to measure time: C for a predetermined time: Tma
Determine whether or not x has been exceeded. The predetermined time mentioned above: Tmax
Is the time required from the start of operation of the electric water pump 14 until all of the cooling water in the heat storage container 15 is replaced (all the heat storage hot water stored in the heat storage container 15 is discharged from the heat storage container 15). It is a time determined based on the above.

If it is determined in S2210 that the counter: C measurement time: C is within the predetermined time: Tmax, the ECU 39 determines that the counter: C measurement time:
Until C exceeds the predetermined time: Tmax, S2210
The process of is repeatedly executed.

If it is determined in S2210 that the time measured by the counter: C: C exceeds the predetermined time: Tmax, the ECU 39 proceeds to S2211, stops the operation of the electric water pump 14, and then completes the operation. Terminates the routine execution.

If it is determined in S2203 that the engine side water temperature: THW is equal to or higher than the first predetermined temperature: thw1 (for example, 0 ° C.), the ECU 39 determines in S220.
5, the engine side water temperature: THW is determined whether or not the first predetermined temperature: thw1 or more and the second predetermined temperature (for example, 40 ° C.): thw2 or less (thw1 ≦ THW ≦ thw2).

[0244] In S2205, the engine side water temperature: THW
Is the first predetermined temperature: thw1 or more and the second predetermined temperature: thw2
When it is determined that it is the following, that is, the engine side water temperature:
If it is determined that THW is in the normal temperature range, the ECU 39
Is considered to be capable of raising the temperature of the internal combustion engine 1 to a desired temperature range only with the stored hot water in the heat storage container 15, and S
Proceed to 2206.

At S2206, the ECU 39 controls the flow passage switching valve 16 so that the first heater hose 11a and the third bypass passage 13c are electrically connected (the second heater hose 11b and the second transmission cooling water passage 43b are cut off). To do.

The ECU 39, which has finished executing the above-described processing of S2206, proceeds to S2208, and applies drive power to the electric water pump 14 to operate the electric water pump 14.

In this case, as described in the description of FIG. 16 in the above-mentioned second embodiment, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third.
Bypass passage 13c → passage switching valve 16 → first heater hose 11a → first cooling water passage 4 → head side cooling water passage 2a → block side cooling water passage 2b → mechanical water pump 10 →
Since the circulation circuit in which the cooling water flows is established in the order of the third cooling water passage 8 → the fourth heater hose 11d → the first bypass passage 13a → the electric water pump 14, the stored hot water in the heat storage container 15 is the head side cooling water passage 2a and the block. It is supplied to the side cooling water passage 2b, so that the internal combustion engine 1 is quickly warmed.

Now, returning to FIG. 22, when the ECU 39 finishes executing the process of S2208, it executes the above-mentioned S220.
After executing the same processing as 9 to S2211, the execution of this routine ends.

If it is determined in S2205 that the engine side water temperature: THW is not equal to or higher than the first predetermined temperature: thw1 and equal to or lower than the second predetermined temperature: thw2, that is, the engine side water temperature: THW is The second predetermined temperature: thw2
When it is determined that the temperature is higher, the temperature of the intake port wall surface and the combustion chamber wall surface of the internal combustion engine 1 is sufficiently high, and the amount of heat required for the cooling water to warm the indoor heating air is sufficient. However, assuming that the temperature of the transmission oil may be low, the process proceeds to S2207.

At S2207, the ECU 39 controls the flow passage switching valve 16 so that the third bypass passage 13c and the first transmission cooling water passage 43a are electrically connected (the first heater hose 11a and the second heater hose 11b are cut off). To do.

The ECU 39, which has completed the above-described processing of S2207, proceeds to S2208, and applies drive power to the electric water pump 14 in order to operate the electric water pump 14.

In this case, as described in the explanation of FIG. 18 in the above-mentioned second embodiment, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third.
Circulation in which cooling water flows in the order of the bypass passage 13c → the passage switching valve 16 → the first transmission cooling water passage 43a → the heat exchanger 44 → the second transmission cooling water passage 43b → the first bypass passage 13a → the electric water pump 14. Since the circuit is established, the heat storage hot water in the heat storage container 15 is supplied to the heat exchanger 44, and the heat of the heat storage hot water is transferred to the transmission oil in the heat exchanger 44. As a result, the transmission oil is quickly warmed and the viscosity of the transmission oil is reduced, so that the torque required when the internal combustion engine 1 operates the transmission is reduced, thereby improving the fuel consumption rate of the internal combustion engine 1. It becomes possible.

Returning now to FIG. 22, when the ECU 39 finishes executing the process of S2208, the ECU 39 executes the above-mentioned S220.
After executing the same processing as 9 to S2211, the execution of this routine ends.

When the supply destination of the heat storage hot water is determined according to the temperature of the internal combustion engine 1 (engine side water temperature: THW) at the start of supplying the heat storage hot water, the finite heat storage hot water stored in the heat storage container 15 is set. Internal combustion engine 1 and heater core 1
It is possible to reliably warm at least one of the 2 (room heating device) and the heat exchanger 44 (transmission oil).

Therefore, according to the cooling water flow switching control according to the present embodiment, the heat storage hot water in the heat storage container 15 can be supplied to any one of the internal combustion engine 1, the heater core 12, and the heat exchanger 44. In the internal combustion engine provided with the device, at least one of the internal combustion engine 1, the room heating air, and the transmission oil is suitably warmed.

As a result, it becomes possible to reliably improve the startability and exhaust emission of the internal combustion engine 1, the indoor heating performance, or the fuel consumption rate of the internal combustion engine 1.

In the cooling water flow switching control in the present embodiment, an example in which the operation stop timing of the electric water pump 14 is determined based on the measurement time of the counter C has been described, but the temperature of the room heating air, The operation stop timing of the electric water pump 14 may be determined based on the temperature of the internal combustion engine 1 (engine side water temperature: THW) or the temperature of the transmission oil. For example, the operation of the electric water pump 14 may be stopped when the temperature of the room heating air, the temperature of the internal combustion engine 1, or the temperature of the transmission oil rises to a predetermined temperature. The operation of the electric water pump 14 may be stopped when the temperature, the temperature of the internal combustion engine 1, or the temperature of the transmission oil rises by a predetermined temperature from the temperature at the start of the operation of the electric water pump 14.

[0258]

According to the present invention, in an internal combustion engine equipped with a heat storage device capable of selectively supplying the heat medium stored in the heat storage container to the internal combustion engine and the engine-related element, the internal combustion engine and / or the engine-related element When the temperature is raised, it is possible to efficiently use the heat stored in the heat storage container, and thus it is possible to preferably warm the internal combustion engine and / or the engine-related element.

[Brief description of drawings]

FIG. 1 is a diagram showing a cooling water circulation system of an internal combustion engine according to a first embodiment.

FIG. 2 is a diagram showing a flow of cooling water when the internal combustion engine is operated in a cold state.

FIG. 3 is a diagram showing a flow of cooling water after completion of warming up of the internal combustion engine.

FIG. 4 is a diagram showing a flow of cooling water when a heater switch is in an ON state after completion of warming up of the internal combustion engine.

FIG. 5 is a diagram showing a flow of cooling water when warming the internal combustion engine with the stored hot water.

FIG. 6 is a diagram showing a flow of cooling water when warming the indoor heating air with the stored hot water.

FIG. 7 is a diagram (1) showing the relationship between the elapsed time from the start of operation of the electric water pump and the control signal of the flow path switching valve.

FIG. 8 is a diagram (2) showing the relationship between the elapsed time from the start of operation of the electric water pump and the control signal of the flow path switching valve.

FIG. 9 is a flowchart showing a cooling water flow switching control routine according to the first embodiment.

FIG. 10 is a diagram showing a cooling water circulation system of an internal combustion engine according to a second embodiment.

FIG. 11 is a diagram showing the flow of cooling water when the internal combustion engine is operating in a cold state.

FIG. 12 is a diagram showing a flow of cooling water after completion of warming up of the internal combustion engine.

FIG. 13 is a diagram showing a flow of cooling water when a heater switch is in an ON state after completion of warming up of the internal combustion engine.

FIG. 14 is a diagram showing the flow of cooling water when heating or cooling the transmission oil after completion of warming up of the internal combustion engine.

FIG. 15 is a diagram showing a flow of cooling water when the heater switch is in the ON state and the transmission oil is heated or cooled after completion of warming up of the internal combustion engine.

FIG. 16 is a diagram showing a flow of cooling water when warming the internal combustion engine with the stored hot water.

FIG. 17 is a diagram showing the flow of cooling water when warming the indoor heating air with the stored hot water.

FIG. 18 is a diagram showing a flow of cooling water when warming the transmission oil with the stored hot water.

FIG. 19 is a diagram showing the relationship between the elapsed time from the start of operation of the electric water pump and the control signal of the flow path switching valve.

FIG. 20 is a flowchart showing a cooling water flow switching control routine according to the second embodiment.

FIG. 21 is a flowchart showing a cooling water flow switching control routine according to the third embodiment.

FIG. 22 is a flowchart showing a cooling water flow switching control routine according to the fourth embodiment.

[Explanation of symbols]

1 ... Internal combustion engine 1a: Cylinder head 1b ... Cylinder block 2a ... head side cooling water channel 2b ... Block side cooling water channel 10 ... Mechanical water pump 12: Heater core 14 ... Electric water pump 15 ... Heat storage container 16 ... Flow path switching valve 39 ... ECU 44 ... Heat exchanger

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Otsuka             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Yasuhiro Kuze             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Rentaro Kuroki             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd.

Claims (9)

[Claims] 1. A heat storage container that stores a heat medium in a heat storage state, a supply unit that supplies the heat medium stored in the heat storage container to an internal combustion engine or an engine-related element, and a supply start of the heat medium by the supply unit. An internal combustion engine including a heat storage device, comprising: a switching unit that switches a supply destination of a heat medium according to an elapsed time from a time point. 2. The switching means supplies the heat medium from the heat storage container to the internal combustion engine within a predetermined time from the start of supplying the heat medium by the supply means, and the heat storage container after the predetermined time has elapsed. An internal combustion engine equipped with the heat storage device according to claim 1, wherein a heat medium is supplied from the above to the engine-related element. 3. The heat storage device according to claim 1, wherein the engine-related element is a heat exchanger that exchanges heat between the heat medium and room heating air. Internal combustion engine equipped. 4. The heat storage device according to claim 1, wherein the engine-related element is a heat exchanger that exchanges heat between the heat medium and the lubricating oil of the transmission. Internal combustion engine equipped. 5. The engine-related element includes a first heat exchanger that performs heat exchange between the heat medium and room heating air, and heat exchange between the heat medium and lubricating oil of a transmission. A second heat exchanger for performing the above, wherein the switching means supplies the heat medium from the heat storage container to the internal combustion engine within a first predetermined time from the start of supplying the heat medium by the supplying means, and Within a second predetermined time from the time when the first predetermined time has passed, the first
2. The heat medium is supplied to the heat exchanger according to claim 1, and after the second predetermined time has elapsed, the heat medium is supplied from the heat storage container to the second heat exchanger. Internal combustion engine equipped with a heat storage device. 6. A heat storage container for storing a heat medium in a heat storage state, a supply means for supplying the heat medium stored in the heat storage container to an internal combustion engine or an engine-related element, and the supply means for supplying the heat medium. An internal combustion engine including a heat storage device, comprising: a switching unit that switches a supply destination of a heat medium according to a temperature of the internal combustion engine at a start time. 7. The engine-related element is a heat exchanger for exchanging heat between the heat medium and room heating air, and the switching means has a temperature of the internal combustion engine lower than a first predetermined temperature. Is supplied from the heat storage container to the heat exchanger, and when the temperature of the internal combustion engine is equal to or higher than a first predetermined temperature, the heat medium is supplied from the heat storage container to the internal combustion engine. An internal combustion engine comprising the heat storage device according to claim 6. 8. The engine-related element is a heat exchanger for exchanging heat between the heat medium and lubricating oil of a transmission, and the switching means has a temperature of the internal combustion engine lower than a second predetermined temperature. Is supplied from the heat storage container to the internal combustion engine, and when the temperature of the internal combustion engine is equal to or higher than a second predetermined temperature, the heat medium is supplied from the heat storage container to the heat exchanger. An internal combustion engine comprising the heat storage device according to claim 6. 9. The engine-related element includes a first heat exchanger for exchanging heat between the heat medium and room heating air, and a heat exchange between the heat medium and lubricating oil of a transmission. And a second heat exchanger configured to perform a heat transfer from the heat storage container to the first heat exchanger when the temperature of the internal combustion engine is lower than a first predetermined temperature. When the temperature of the internal combustion engine is equal to or higher than the first predetermined temperature and is lower than a second predetermined temperature set higher than the first predetermined temperature, a heat medium is supplied from the heat storage container to the internal combustion engine. The heat storage device according to claim 6, wherein the heat medium is supplied from the heat storage container to the second heat exchanger when the temperature of the internal combustion engine is higher than the second predetermined temperature. Internal combustion engine.