JP2002004855A - Internal combustion engine having thermal storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technique capable of realizing efficient preheating of internal combustion engine and efficient heat exchange in a heater core, without complicating a heat medium circulating system, in an internal combustion engine, in which a heat accumulating container and an electric water pump are arranged on the heat medium circulation system, set via the internal combustion engine and the heater core for warming the inside of a vehicle. SOLUTION: This internal combustion engine, having a heat accumulating device, is provided with a heater core for performing heat exchange between a heat medium and air for warming the inside of a vehicle, a heat medium circulating circuit for circulating the heat medium via the internal combustion engine and the heater core, and a bypass passage connected to the heat medium circulating circuit, so as to detour the heater core. A heat accumulating container and a pumping mechanism are arranged on a bypass passage to make the positional relation, in which the heat accumulating container, the pump mechanism and the heater core are parallel to one another in the flowing direction of the heat medium. A circulating circuit set via only the heat accumulating container, the pump mechanism and the internal combustion engine and a circulating circuit which are set via only the internal combustion engine and the heat core, are selectively established.

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 cooled or heated by circulation of a heat medium such as cooling water, and more particularly to an internal combustion engine having a heat storage device for storing heat of the heat medium.

[0002]

2. Description of the Related Art In an internal combustion engine mounted on an automobile or the like, a heat storage container is provided in a cooling water circulation system of the internal combustion engine for the purpose of improving the performance of a heating device for a passenger compartment in a cold state and promoting warm-up of the internal combustion engine. Technology has been proposed.

[0003] As such a technique, for example, a heating device for a vehicle as disclosed in Japanese Patent Application Laid-Open No. 10-309933 is known. This publication discloses a water passage for flowing cooling water via an internal combustion engine and a heater core, a heat storage tank provided upstream of the heater core in the water passage in a flow direction of the cooling water for keeping the cooling water warm and stored, A heating element provided upstream of the heat storage tank in the direction of flow of cooling water from the heat storage tank to heat the cooling water flowing through the channel; and a heating element disposed in the channel and upstream of the heating element in the direction of flow of cooling water to flow through the channel. A vehicle heating device including an electric pump for pumping cooling water to be heated is disclosed.

[0004] The above-described vehicle heating device stores the high-temperature cooling water heated by the heating element in the heat storage tank, so that when the temperature of the cooling water is low, such as when the temperature is low, the heat storage tank is used. Is to supply the high-temperature cooling water stored in the heater core to the heater core, thereby improving the heating performance.

[0005]

By the way, in the above-described conventional vehicle heating apparatus, the electric pump, the heat storage tank, and the heater core are provided in series from the upstream side in the flow direction of the cooling water in order. When high-temperature cooling water in the heat storage tank is supplied to the internal combustion engine such as when warming up the internal combustion engine, the cooling water flowing out of the heat storage tank flows into the internal combustion engine after passing through the heater core. ,
The flow resistance of the cooling water increases.

When the flow resistance of the cooling water in the water channel upstream of the internal combustion engine increases, the flow rate of the cooling water flowing into the internal combustion engine per unit time decreases, and accordingly, the cooling water is transmitted from the cooling water to the internal combustion engine per unit time. Since the amount of heat to be reduced also decreases, preheating of the internal combustion engine may not be performed sufficiently, or preheating of the internal combustion engine may take time.

Further, in the above-described conventional vehicle heating system, the cooling water flowing out of the internal combustion engine is supplied to the heater core to supply the heating water, as in the case where the temperature of the cooling water flowing out of the internal combustion engine is sufficiently high. When heating the air, the cooling water flowing out of the internal combustion engine flows into the heater core after passing through the electric pump and the heat storage tank, so that the flow resistance of the cooling water increases.

When the flow resistance of the cooling water in the water passage upstream of the heater core increases, the flow rate of the cooling water flowing into the heater core per unit time decreases, and accordingly, the cooling water flows from the cooling water to the heating air per unit time in the heater core. Since the amount of heat transferred also decreases, a desired heating performance may not be obtained.

On the other hand, a water channel bypassing the heater core,
Although it is conceivable to separately provide a water channel that bypasses the electric pump and a water channel that bypasses the heat storage tank, there is a problem in that the circulation circuit of the cooling water becomes complicated and the mountability of the vehicle heating device in the vehicle is deteriorated.

The present invention has been made in view of the various circumstances as described above, and is directed to an internal combustion engine in which a heat storage container is arranged in a heat medium circulating system passing through the internal combustion engine and a heater core for heating a vehicle interior. It is another object of the present invention to provide a technique capable of realizing efficient preheating of an internal combustion engine and improvement in performance of a vehicle interior heating device without complicating the configuration of a heat medium circulation system.

[0011]

The present invention employs the following means to solve the above-mentioned problems. That is, the internal combustion engine having the heat storage container according to the present invention is an internal combustion engine body that is cooled or heated by the circulation of the heat medium, and a heater core that performs heat exchange between the heat medium and air for heating the passenger compartment, A heat medium circulation circuit that circulates a heat medium via the internal combustion engine body and the heater core, a bypass passage connected to the heat medium circulation circuit so as to bypass the heater core, and provided in the bypass passage; A heat storage container for storing heat of the heat medium, and a pump mechanism provided in the bypass passage for pumping the heat medium in the bypass passage are provided.

In the internal combustion engine having the heat storage device configured as described above, the heat storage container and the pump mechanism are arranged in the bypass passage that bypasses the heater core. It will be located in parallel with the heater core.

When the heat storage container and the pump mechanism are in a positional relationship in parallel with the heater core, the internal combustion engine, the heater core and the heat storage container can be connected to each other without separately providing a path bypassing the heater core or a path bypassing the heat storage device and the pump mechanism. A circulation circuit passing through all of the pump mechanism, a circulation circuit passing only through the internal combustion engine, the heat storage vessel, and the pump mechanism, a circulation circuit passing only through the heat storage vessel, the pump mechanism, and the heater core, and passing only through the internal combustion engine and the heater core It is possible to selectively establish a circulating circuit to perform.

For example, when the internal combustion engine is preheated prior to starting the internal combustion engine, a circulation circuit is established through only the internal combustion engine, the heat storage container, and the pump mechanism, and the pump mechanism is operated.

In this case, the high-temperature heat medium in the heat storage container flows into the internal combustion engine without passing through the heater core, and the flow resistance of the heat medium does not increase in the flow path from the heat storage container to the internal combustion engine. .

As a result, the flow rate of the heat medium flowing into the internal combustion engine per unit time does not decrease, and accordingly, the amount of heat transferred from the heat medium to the internal combustion engine per unit time does not decrease.

Further, when heating the air for heating the cabin in a situation where the temperature of the heat medium flowing out of the internal combustion engine is relatively high, a circulation circuit is established through only the internal combustion engine and the heater core.

In this case, the high-temperature heat medium flowing out of the internal combustion engine flows into the heater core without passing through the heat storage container and the pump mechanism, and the flow resistance of the heat medium in the flow path from the internal combustion engine to the heater core increases. Nothing.

As a result, the flow rate of the heat medium flowing into the heater core per unit time does not decrease, and accordingly, the amount of heat transmitted from the heat medium to the vehicle interior heating air per unit time in the heater core also decreases. Absent.

The internal combustion engine having the heat storage device according to the present invention may further include a shutoff mechanism for shutting off the flow of the heat medium into the bypass passage and the flow into the heater core.

This is because when a circulation circuit is established through only the internal combustion engine, the heat storage vessel and the pump mechanism to preheat the internal combustion engine prior to the start of the internal combustion engine, the heat medium unnecessarily flows into the heater core. Alternatively, when a circulation circuit that passes only through the internal combustion engine and the heater core is established in order to heat the air for heating the cabin in a situation where the temperature of the heat medium flowing out of the internal combustion engine is relatively high, the heat medium is transferred to the heat storage container. This is to prevent unnecessary inflow.

In the internal combustion engine having the heat storage device according to the present invention, the heat storage container has a heat medium inlet for allowing a heat medium flowing through a bypass passage to flow into the heat storage container, and a heat medium that bypasses the heat medium in the heat storage container. A heat medium outlet for flowing out to the passage may be provided, and the heat medium inlet and / or the heat medium outlet may be provided with a backflow prevention mechanism for preventing backflow of the heat medium.

In this case, the low-temperature cooling water in the heat medium circulation circuit and the bypass passage does not flow into the heat storage container unnecessarily. In addition, examples of the heat medium according to the present invention include engine cooling water and lubricating oil.

[0024]

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

FIG. 1 is a diagram showing a schematic configuration of a cooling water circulation system of a water-cooled internal combustion engine for driving a vehicle mounted on a vehicle. The internal combustion engine 1 is a water-cooled internal combustion engine that is cooled or heated using cooling water as a heat medium, and includes a cylinder head 1a and a cylinder block 1b. A head side cooling water passage 2a and a block side cooling water passage 2b for flowing cooling water are formed in the cylinder head 1a and the cylinder block 1b, respectively.
a and the block side cooling water passage 2b communicate with each other.

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

In addition to the cooling water passage 6, a cooling water passage 8 and a bypass passage 9 are connected to the thermostat valve 7. The cooling water passage 8 is connected to a suction port of a water pump 10 driven by a rotating torque of a crankshaft (not shown).
The discharge port 0 is connected to the block-side cooling water passage 2b. On the other hand, the bypass passage 9 is connected to the head-side cooling water passage 2a.

The thermostat valve 7 is a flow path switching valve that closes one of the cooling water passage 6 and the bypass passage 9 in accordance with the temperature of the cooling water. Specifically, when the temperature of the cooling water flowing through the thermostat valve 7 is equal to or lower than a predetermined valve opening temperature: T ₁ , the thermostat valve 7 shuts off the cooling water passage 6 and simultaneously opens the cooling water passage 9, The cooling water passage 8 and the cooling water passage 9 are conducted,
Temperature of the cooling water flowing through the thermostat valve 7 said valve opening temperature: when higher than T ₁ is to block the cooling water passage 9 and simultaneously opens the cooling water passage 6, thereby turning on the cooling water channel 8 and the cooling water channel 6.

Next, a heater hose 11 is connected in the middle of the cooling water passage 4, and the heater hose 11 is connected in the middle of the cooling water passage 8 connecting the thermostat valve 7 and the water pump 10. I have.

In the middle of the heater hose 11, a heater core 1 for exchanging heat between the cooling water and the air for heating the vehicle interior is provided.
2 are arranged. A first bypass passage 13a is connected in the middle of the heater hose 11 located between the heater core 12 and the cooling water passage 8.

The first bypass passage 13a is connected to a 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 at a predetermined pressure from the cooling water discharge port.

The cooling water discharge port of the electric water pump 14 is connected to a heat storage container 15 through a second bypass passage 13b.
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, high-temperature cooling water stored in the heat storage container 15 is discharged from the cooling water outlet instead.

The cooling water inlet and the cooling water outlet of the heat storage vessel 15 are provided with one-way valves 15a and 15b for preventing the cooling water from flowing backward. These one-way valves 15a and 15b are one embodiment of the backflow prevention mechanism according to the present invention.

At the cooling water outlet of the heat storage container 15 described above,
The third 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 cooling water passage 4.

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

At the connection between the third heater hose 11c, the fourth heater hose 11d, and the first bypass passage 13a, a flow path switching valve 16 is provided. The flow path switching valve 16 is an embodiment of the shutoff mechanism according to the present invention,
A valve that selectively switches between conduction of all the three passages described above and cutoff of any one of the three passages.
The flow path switching valve 16 is driven by an actuator including, for example, a step motor.

The internal combustion engine 1 in the cooling water passage 4
A first water temperature sensor 17 that outputs an electric signal corresponding to the temperature of the cooling water flowing through the cooling water passage 4 is attached to a portion near the cooling water passage 4.

The fourth heater hose 1d is located near the portion of the fourth heater hose 11d connected to the cooling water passage 8.
A second water temperature sensor 18 that outputs an electric signal corresponding to the temperature of the cooling water flowing inside 1d is attached.

An electronic control unit (ECU) 19 for controlling the cooling water circulating system is provided in the cooling water circulating system of the internal combustion engine 1 configured as described above. The ECU 19 is electrically connected to the first and second water temperature sensors 17 and 18 described above, and is also electrically connected to the electric water pump 14 and the flow path switching valve 16. The electric water pump 14 and the flow path switching valve 16 can be controlled using the operating state, the output signal values of the first and second water temperature sensors 17 and 18 as parameters, and the like.

The operation of the internal combustion engine having the heat storage device according to this embodiment will be described below. First, a case where the internal combustion engine 1 is preheated before starting will be described. It is assumed that high-temperature cooling water is stored in the heat storage container 15 in advance.

Before the cranking of the internal combustion engine 1 is started, in other words, before the starter motor (not shown) operates, the ECU 19 shuts off the third heater hose 11c, and disconnects the first bypass passage 13a and the fourth heater hose. 1
In addition to controlling the flow path switching valve 16 so as to establish conduction with 1d, the electric water pump 14 is operated.

In this case, since the water pump 10 does not operate and only the electric water pump 14 operates, as shown in FIG. 2, the electric water pump 14 → the second bypass passage 13b → the heat storage container 15 → the third bypass passage. 13
c → first heater hose 11a → cooling water passage 4 → head side cooling water passage 2a → block side cooling water passage 2b → water pump 10 → cooling water passage 8 → fourth heater hose 11d → flow rate switching valve 16 → first bypass passage 13a → electrically driven A circulation circuit through which the cooling water flows in the order of the water pump 14 is established. That is, a circulation circuit is established through only the electric water pump 14, the heat storage container 15, and the internal combustion engine 1.

In such a circulation circuit, when the cooling water discharged from the electric water pump 14 flows into the heat storage container 15 via the second bypass passage 13b, the high-temperature stored in the heat storage container 15 is substituted for the cooling water. The cooling water is discharged from the heat storage container 15 and the third bypass passage 1
3c, the first heater hose 11a, and the cooling water passage 4 to flow into the head-side cooling water passage 2a in the internal combustion engine 1, and then from the head-side cooling water passage 2a to the block-side cooling water passage 2b.
Will flow into

Subsequently, when the high-temperature cooling water discharged from the heat storage vessel 15 flows into the head-side cooling water passage and the block-side cooling water passage 2b of the internal combustion engine 1, the head-side cooling water passage 2a and the block-side cooling water passage 2b are replaced instead. The low-temperature cooling water remaining in the cooling water flow from the head-side cooling water channel 2a and the block-side cooling water channel 2b to the cooling water channel 8.

As a result, in the internal combustion engine 1, the heat storage container 15
Is transmitted to the wall surfaces of the head side cooling water passage 2a and the block side cooling water passage 2b, whereby the internal combustion engine 1 is preheated.

Further, in the above-described circulation circuit, the heat storage vessel 1
Since the high-temperature cooling water discharged from the fuel tank 5 reaches the internal combustion engine 1 without passing through the heater core 12, the heat storage vessel 15
The flow resistance of the cooling water does not increase in the flow path from the cooling water to the internal combustion engine 1.

As a result, the amount of the high-temperature cooling water flowing into the internal combustion engine 1 per unit time does not decrease.
It is possible to sufficiently secure the amount of heat that can be transmitted to the heat exchanger.

According to the above-described circulation circuit, high-temperature cooling water from the heat storage vessel 15 is supplied in the order of the head-side cooling water passage 2a → the block-side cooling water passage 2b, so that the cylinder head 1a is preferentially preheated. Will be done. As a result, the wall temperature of the intake port (not shown) and the intake air temperature of the cylinder head 1a rise, so that the vaporization of the fuel is promoted and the temperature of the air-fuel mixture rises. It is possible to improve the startability, shorten the warm-up operation time, and the like.

After the preheating of the internal combustion engine 1 is completed, the ECU
19 stops the operation of the electric water pump 14 and then applies driving power to a starter motor, a fuel injection valve, and the like to start cranking of the internal combustion engine 1, thereby starting the internal combustion engine 1.

As a method of determining the completion of preheating of the internal combustion engine 1, for example, the preheating of the internal combustion engine 1 is completed when the elapsed time from the start of operation of the electric water pump 14 reaches a predetermined time. And the second
The preheating of the internal combustion engine 1 may be determined to be completed when the output signal value of the water temperature sensor 18 (the temperature of the cooling water flowing out of the internal combustion engine 1) reaches a predetermined temperature or higher.

When the start of the internal combustion engine 1 is completed, the water pump 10 is driven by the rotational torque of the crankshaft. In response to this, the ECU 19 controls the flow path switching valve 16 to shut off the third heater hose 11c, and maintains the electric water pump 14 in a stopped state.

[0052] In this case, with only the water pump 10 without the electric water pump 14 is actuated to operate, the temperature of the cooling water at that time valve opening temperature of the thermostat valve 7: If T ₁ less thermostat valve 7 Since the cooling water passage 6 is shut off and the bypass passage 9 is opened at the same time, the water pump 10 → the block side cooling water passage 2b → the head side cooling water passage 2a → the cooling water passage 9 → the thermostat valve 7 → the cooling water passage 8 → the water pump 10 A circulation circuit through which the cooling water flows in order is established.

By the way, when the electric water pump 14 is stopped and the flow path switching valve 16 shuts off the third heater hose 11c, the water pump 10 causes the block side cooling water passage 2b → the head side cooling water passage 2a → the cooling water passage 4 → 1st heater hose 11a → 3rd bypass passage 13c
→ heat storage container 15 → second bypass passage 13 b → electric water pump 14 → first bypass passage 13 a → flow path switching valve 16 → fourth heater hose 11 d → circuit to water pump 10 via cooling water passage 8 is also considered. But
Since the one-way valves 15a and 15b are provided at the cooling water outlet and the cooling water inlet of the heat storage container 15 according to the present embodiment, the cooling water does not circulate in the circuit as described above.

[0054] Therefore, the valve opening temperature of the temperature thermostat valve 7 of the cooling water after completion of starting of the internal combustion engine 1: If T ₁ or less, as shown in FIG. 3, the water pump 10 →
Only the circulation circuit in which the cooling water flows in the order of the block side cooling water path 2b → the head side cooling water path 2a → the cooling water path 9 → the thermostat valve 7 → the cooling water path 8 → the water pump 10 is established.

According to such a circulation circuit, the internal combustion engine 1
Since the relatively low-temperature cooling water flowing out of the radiator 5 flows around the radiator 5, the cooling water is not unnecessarily cooled by the radiator 5. As a result, the internal combustion engine 1 is not unnecessarily cooled by the cooling water, and the warm-up of the internal combustion engine 1 is not hindered.

After that, the warming-up of the internal combustion engine 1 is completed, and the temperature of the cooling water becomes equal to the valve opening temperature of the thermostat valve 7: T
_When the pressure is higher than ₁ , the thermostat valve 7 opens the cooling water passage 6 and simultaneously shuts off the cooling water passage 9.
As shown in the figure, cooling water flows in the order of the water pump 10, the block side cooling water path 2b, the head side cooling water path 2a, the cooling water path 4, the radiator 5, the cooling water path 6, the thermostat valve 7, the cooling water path 8, and the water pump 10. A circulation circuit is established.

In this case, since the relatively high-temperature cooling water flowing out of the internal combustion engine 1 flows through the radiator 5, the heat of the cooling water is radiated by the radiator 5. As a result, relatively low-temperature cooling water after radiating heat by the radiator 5 flows into the internal combustion engine 1, and the internal combustion engine 1 is cooled by the cooling water.

When the switch of the vehicle interior heating device (not shown) is turned on while the internal combustion engine 1 is operating, the ECU 19 shuts off the first bypass passage 13a and connects the third heater hose 11c with the third heater hose 11c. Fourth heater hose 1
The flow path switching valve 16 is controlled so as to communicate with 1d, and the electric water pump 14 is stopped.

In this case, as shown in FIG. 5, the water pump 10 → the block side cooling water passage 2b → the head side cooling water passage 2a → the cooling water passage 4 → the first heater hose 11a → the second heater hose 11b → the heater core 12 → the third cooling water passage. A circulation circuit in which the cooling water flows in the order of the heater hose 11c → the fourth heater hose 11d → the cooling water passage 8 → the water pump 10 is established. That is, a circulation circuit is established that passes only through the internal combustion engine 1 and the heater core 12.

In such a circulation circuit, high-temperature cooling water flowing out of the internal combustion engine 1 flows through the heater core 12, so that heat exchange is performed between the cooling water and the vehicle interior heating air in the heater core 12. That is, the heat of the cooling water is transmitted to the vehicle interior heating air in the heater core 12, and as a result, the vehicle interior heating air is heated.

Further, in the above-described circulation circuit, the internal combustion engine 1
Since the cooling water flowing out of the cooling water flows into the heater core 12 without passing through the electric water pump 14 or the heat storage vessel 15, the flow resistance of the cooling water in the flow path from the internal combustion engine 1 to the heater core 12 does not become excessively high. ,
The amount of high-temperature cooling water flowing into the heater core 12 per unit time does not excessively decrease. As a result, the amount of heat that can be transferred from the high-temperature cooling water to the heating air per unit time in the heater core 12 is sufficiently ensured.

Further, when the internal combustion engine 1 according to the present embodiment is mounted on a vehicle that temporarily stops the operation of the internal combustion engine when the vehicle is stopped or the like, the switch of the vehicle interior heating device is turned on. When the operation of the internal combustion engine 1 is stopped, E
The CU 19 controls the flow path switching valve 16 so as to conduct all the paths of the third heater hose 11c, the first bypass passage 13a, and the fourth heater hose 11d, and operates the electric water pump 14.

In this case, since the water pump 10 does not operate and only the electric water pump 14 operates, as shown in FIG. 6, the electric water pump 14 → the second bypass passage 13b → the heat storage container 15 → the third bypass passage. 13
c → first heater hose 11a → cooling water passage 4 → head side cooling water passage 2a → block side cooling water passage 2b → water pump 10 → cooling water passage 8 → fourth heater hose 11d → thermostat valve 7 → first bypass passage 13a → electric water At the same time when a circulation circuit in which the cooling water flows in the order of the pump 14 is established, the electric water pump 14 → the second bypass passage 13b → the heat storage container 15 → the third bypass passage 13c.
→ second heater hose 11b → heater core 12 → third heater hose 11c → flow path switching valve 16 → first bypass passage 1
A circulation circuit through which the cooling water flows in the order of 3a → the electric water pump 14 is established.

When the above-described two circulation circuits are established, the high-temperature cooling water flowing out of the internal combustion engine 1 and the high-temperature cooling water flowing out of the heat storage container 15 flow into the heater core 12 while being mixed. .

As a result, even if the operation of the internal combustion engine 1 is stopped and the water pump 10 is stopped, high-temperature cooling water flows through the heater core 12, and the performance of the vehicle interior heating device is reduced. Nothing.

When storing high-temperature cooling water in the heat storage container 15, the ECU 19 immediately stops the internal combustion engine 1.
By controlling the electric water pump 14 and the flow path switching valve 16 to establish the circulation circuit as described in the description of FIG. 2 or FIG. 6, high-temperature cooling water flowing out of the internal combustion engine 1 can be stored in the heat storage vessel 15. What is necessary is just to make it flow in.

In the internal combustion engine having the heat storage device according to the above-described embodiment, the electric water pump 14 and the heat storage container 15 have the bypass passage 13 that bypasses the heater core 12.
Therefore, the electric water pump 14 and the heat storage container 15 are positioned in parallel with the heater core 12 in the flow direction of the cooling water, and the internal combustion engine 1 and the heat storage container 15
And a circulation circuit passing only through the electric water pump 14,
In addition, it is possible to selectively establish a circulation circuit that passes only through the internal combustion engine 1 and the heater core 12.

As a result, when supplying the high-temperature cooling water in the heat storage container 15 to the internal combustion engine 1, the cooling water flowing out of the heat storage container 15 can reach the internal combustion engine 1 without passing through the heater core 12. And the internal combustion engine 1
When the high-temperature cooling water flowing out of the internal combustion engine 1 is supplied to the heater core 12, the cooling water flowing out of the internal combustion engine 1 can reach the heater core 12 without passing through the electric water pump 14 and the heat storage container 15. The flow rate of the cooling water flowing into the internal combustion engine 1 or the heater core 12 per unit time does not decrease, and accordingly, the amount of heat that can be transferred from the cooling water to the internal combustion engine 1 per unit time or the cooling per unit time in the heater core 12 The amount of heat that can be transferred from the water to the air for heating the passenger compartment does not decrease.

Therefore, according to the internal combustion engine having the heat storage device according to the present embodiment, it is possible to efficiently preheat the internal combustion engine and improve the performance of the vehicle interior heating device without complicating the configuration of the cooling water circulation system. Can be realized. That is, according to the internal combustion engine having the heat storage device according to the present embodiment, efficient preheating of the internal combustion engine and improvement in performance of the vehicle interior heating device are realized without deteriorating the mountability of the cooling water circulation system in the vehicle. It becomes possible.

<Other Embodiment> Next, another embodiment of the internal combustion engine having the heat storage device according to the present invention will be described with reference to FIG.
This will be described with reference to FIG. Here, only the configuration different from the above-described embodiment will be described, and the description of the same configuration will be omitted.

FIG. 7 is a diagram showing a schematic configuration of a cooling water circulation system of an internal combustion engine having a heat storage device according to the present invention. This embodiment is different from the above-described embodiment in that a cooling water heating mechanism 20 for heating the cooling water is provided in the middle of the second heater hose 11b.

The cooling water heating mechanism 20 may be any mechanism that heats cooling water using heat other than the heat generated in the internal combustion engine 1 as a heat source, and examples thereof include a combustion type heater and an electric heater. In the internal combustion engine having the heat storage device configured as described above, when the operation of the internal combustion engine 1 is temporarily stopped due to a stop of the vehicle or the like, and the switch of the heating device for the vehicle interior is in an on state, the ECU 19: first and or the output signal value of the second temperature sensor 17 (cooling water temperature) is the predetermined temperature: determines whether higher than T _2.

At this time, if the cooling water temperature is higher than the predetermined temperature: T _{2, the} ECU 19 performs the same operation as in the above-described embodiment.
By controlling the flow path switching valve 16 to make all the paths of the third heater hose 11c, the first bypass passage 13a, and the fourth heater hose 11d conductive, the electric water pump 14 is operated, and the high temperature discharged from the internal combustion engine 1 is increased. And the high-temperature cooling water flowing out of the heat storage container 15 flows into the heater core 12.

On the other hand, if the cooling water temperature is equal to or lower than the predetermined temperature: T _{2, the} ECU 19 shuts off the fourth heater hose 11 d, and connects the third heater hose 11 c to the first bypass passage 1.
The flow path switching valve 16 is controlled so as to establish electrical connection with the valve 3a, the electric water pump 14 is operated, and the cooling water heating mechanism 20 is further operated.

In this case, as shown in FIG. 8, the electric water pump 14 → the second bypass passage 13b → the heat storage vessel 1
5 → third bypass passage 13c → second heater hose 11b
→ cooling water heating mechanism 20 → second heater hose 11b → heater core 12 → third heater hose 11c → flow path switching valve 16
→ 1st bypass passage 13a → electric water pump 14
A circulation circuit through which the cooling water flows is established in this order.

In the above-described circulation circuit, the cooling water flowing out of the heat storage container 15 is heated by the cooling water heating mechanism 20, then flows into the heater core 12, and the heat of the cooling water is transmitted to the heating air.

Therefore, even when the temperature of the cooling water is low, the amount of heat required for the heater core 12 to heat the heating air can be secured in a short time. Also,
When storing high-temperature cooling water in the heat storage container 15,
The CU 19 can supply the high-temperature cooling water heated by the cooling water heating mechanism 20 to the heat storage container 15 by establishing the circulation circuit as described in the description of FIG. 8.

In the configuration shown in FIG. 7 described above, when storing the high-temperature cooling water in the heat storage container 15, the cooling water flowing out of the cooling water heating mechanism 20 passes through the heater core 12 and is stored in the heat storage container 15. Because it will flow in,
In order to more efficiently store the high-temperature cooling water in the heat storage container 15, the cooling water heating mechanism 20 may be provided in the middle of the third heater hose 11c as shown in FIG.

In the internal combustion engine having the heat storage device configured as described above, when storing the high-temperature cooling water in the heat storage container 15, the ECU 19 shuts off the fourth heater hose 11d and sets the third heater hose 11c And the first bypass passage 1
The flow path switching valve 16 is controlled so as to establish electrical connection with the valve 3a, the electric water pump 14 is operated, and the cooling water heating mechanism 20 is further operated.

In this case, as shown in FIG. 10, the electric water pump 14 → second bypass passage 13b → heat storage container 15 → third bypass passage 13c → second heater hose 11
b → heater core 12 → third heater hose 11c → cooling water heating mechanism 20 → third heater hose 11c → flow path switching valve 1
6 → first bypass passage 13a → electric water pump 1
A circulation circuit in which the cooling water flows in the order of 4 is established.

In the above circulation circuit, the cooling water heating mechanism 2
Since the high-temperature cooling water heated by 0 flows into the heat storage container 15 without passing through the heater core 12, even when the temperature of the cooling water is low, the high-temperature cooling water is quickly introduced into the heat storage container 15. It can be stored.

[0082]

The internal combustion engine having the heat storage device according to the present invention exchanges heat between the internal combustion engine main body, which is cooled or heated by the circulation of the heat medium, and the heat medium and the air for heating the passenger compartment. A heater core, a heat medium circulation circuit passing through the internal combustion engine main body and the heater core, a bypass passage connected to the heat medium circulation circuit so as to bypass the heater core, and heat of the heat medium provided in the bypass passage. And a pump mechanism provided in the bypass passage for pumping the heat medium in the bypass passage, so that the heat storage container and the pump mechanism are arranged in parallel with the heater core in the flow direction of the heat medium. Therefore, there is no need to separately provide a path that bypasses the heater core or a path that bypasses the heat storage device and the pump mechanism. A circulation circuit passing through all of the heat storage container and the pump mechanism; a circulation circuit passing only through the internal combustion engine, the heat storage container and the pump mechanism; a circulation circuit passing through only the heat storage container, the pump mechanism and the heater core; It is possible to selectively establish a circulation circuit passing only through the heater core.

When the internal combustion engine is preheated prior to the start of the internal combustion engine, a circulation circuit is established through only the internal combustion engine, the heat storage container, and the pump mechanism.
Since the high-temperature heat medium in the heat storage container flows into the internal combustion engine without passing through the heater core, the flow resistance of the heat medium does not increase upstream of the internal combustion engine. The amount of heat transferred from the medium to the internal combustion engine does not decrease.

When heating the air for heating the cabin in a situation where the temperature of the heat medium flowing out of the internal combustion engine is relatively high, a circulation circuit that passes only through the internal combustion engine and the heater core is established. Since the high-temperature heat medium flowing out of the internal combustion engine flows into the heater core without passing through the heat storage container and the pump mechanism, the flow resistance of the heat medium does not increase upstream of the heater core. The amount of heat transferred from the heat medium to the vehicle interior heating air per unit time does not decrease.

Therefore, according to the internal combustion engine having the heat storage container according to the present invention, the efficient preheating of the internal combustion engine and the improvement of the performance of the heating device for the vehicle interior can be realized without complicating the structure of the heat medium circulation system. It is possible to do.

Further, according to the internal combustion engine having the heat storage device of the present invention, if the internal combustion engine further includes a shutoff mechanism for shutting off the flow of the heat medium into the bypass passage and / or the heater core, the shutoff mechanism is provided with a heat source for the heater core. By blocking the inflow of the medium, substantially all of the heat medium flowing out of the heat storage container can reach the internal combustion engine without passing through the heater core, and the blocking mechanism blocks the inflow of the heat medium into the bypass passage. Substantially all of the heat medium flowing out of the internal combustion engine can reach the heater core without passing through the heat storage container and the pump mechanism.

In this case, it is possible to perform the preheating of the internal combustion engine and / or the heating of the air for heating the vehicle interior by making full use of the heat of the heat medium.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an internal combustion engine having a heat storage device according to the present invention.

FIG. 2 is a diagram showing a circulation circuit of cooling water when the internal combustion engine is preheated.

FIG. 3 is a diagram showing a circulation circuit of cooling water when the internal combustion engine is warmed up.

FIG. 4 is a diagram showing a circulation circuit of cooling water after the internal combustion engine has been warmed up.

FIG. 5 is a diagram illustrating a circulation circuit of cooling water when the heating device is operated when the internal combustion engine is operating.

FIG. 6 is a diagram showing a circulation circuit of cooling water when the heating device is operated when the internal combustion engine is in an operation stop state.

FIG. 7 is a diagram (1) showing another embodiment of the internal combustion engine having the heat storage device according to the present invention.

FIG. 8 is a diagram showing a circulation circuit of cooling water when the heating device is operated in a cold state.

FIG. 9 is a diagram (2) showing another embodiment of the internal combustion engine having the heat storage device according to the present invention.

FIG. 10 is a diagram showing a circulation circuit of cooling water in a case where high-temperature cooling water is stored in a heat storage container during a cold period

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine 2a ... Head side cooling water channel 2b ... Block side cooling water channel 4 ... Cooling water channel 8 ... Cooling water channel 10 ... Water pump 11 ... Heater hose 11a .. First heater hose 11b second heater hose 11c third heater hose 11d fourth heater hose 12 heater core 13 bypass passage 13a first bypass passage 13b second Bypass passage 13c Third bypass passage 14 Electric water pump 15 Heat storage container 20 Cooling water heating mechanism

Claims (3)

[Claims] 1. An internal combustion engine body cooled or heated by circulation of a heat medium, a heater core for exchanging heat between the heat medium and air for heating a vehicle interior, via the internal combustion engine body and the heater core A heat medium circulation circuit that circulates the heat medium, and a bypass passage connected to the heat medium circulation circuit so as to bypass the heater core. An internal combustion engine having a heat storage device, comprising: a pump mechanism provided in the bypass passage, for pumping a heat medium in the bypass passage. 2. The internal combustion engine having a heat storage device according to claim 1, further comprising a shutoff mechanism for shutting off a flow of a heat medium into the bypass passage and / or the heater core. 3. The heat storage container has a heat medium inlet through which a heat medium flowing through the bypass passage flows into the heat storage container, a heat medium outlet through which the heat medium in the heat storage container flows out into the bypass passage. The heat medium inlet and / or the heat medium outlet,
The internal combustion engine having a heat storage device according to claim 1, further comprising a backflow prevention mechanism for preventing backflow of the heat medium.