JP2002138833A - Internal combustion engine with heat storage device - Google Patents

Abstract

(57) [Problem] To quickly warm up engine cooling water flowing into an engine body and hydraulic oil of a drive device by reducing heat loss. An engine cooling water heated during operation of the engine is stored, and the cooling water is supplied to a water jacket. At that time, the temperature of the water jacket is increased by heat carried by the cooling water. In an internal combustion engine provided with a heat storage device 1 for storing heat while maintaining a cooling water temperature, the engine cooling water stored in the heat storage device 1 is passed through the water jacket 7 before or at the time of starting the engine, and the drive device 22 is operated. After the engine is started, the heat storage device 1 is removed and the water jacket 7 is removed.
While maintaining the state of circulating the engine cooling water in the path A1 including
Serve at T22.

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 provided with a heat storage device for quickly warming up using a heat storage technique using a heat retaining container.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. Hei 10-71837 discloses that engine cooling water from a heat insulating container is used for warming up an intake heat exchanger, a heat exchanger with lubricating oil for an internal combustion engine, and an automatic transmission. Disclosed is to warm up the internal combustion engine after flowing through the heat exchanger with the working oil, and to configure the engine cooling water of the heat retaining container to circulate between the heat retaining container and the internal combustion engine at the time of warming up. Have been.

[0003]

However, the above publication does not disclose how the engine cooling water is circulated between the heat storage container of the heat storage device and the engine body, and there is a possibility that the warm-up of the engine may be delayed. .

The internal combustion engine provided with the heat storage device of the present invention has been made in view of the above-mentioned circumstances, and the problem to be solved is to reduce the heat loss by reducing the engine cooling water and the drive water flowing through the engine body. It is to warm up the hydraulic oil of a device early.

[0005]

In order to solve the above-mentioned problems, an internal combustion engine provided with a heat storage device according to the present invention is as follows.

That is, the internal combustion engine provided with the heat storage device of the present invention stores the heat medium heated during the operation of the internal combustion engine and supplies the heat medium to the engine body and other places requiring a temperature rise. A heat storage device for storing heat by maintaining the temperature of the heat medium so that the temperature of the temperature-raising required portion is increased by the heat carried by the heat medium, wherein the heat medium stored in the heat storage device is provided. Prior to the start of the internal combustion engine or at the time of start, by passing through the engine main body to a place requiring a temperature increase other than the engine main body, excluding the heat storage device after starting the engine and circulating the heat medium through a path including the engine main body. While maintaining the above condition, the heat medium stored in the heat storage device is supplied to a place requiring a temperature increase other than the engine body.

An internal combustion engine equipped with the heat storage device of the present invention
While storing the heat medium heated during the operation of the internal combustion engine, the heat medium is provided to the engine body and other necessary portions for temperature rise,
At this time, in the internal combustion engine including a heat storage device that stores the heat by maintaining the temperature of the heat medium so that the temperature of the temperature raising required portion is increased by the heat carried by the heat medium, the heat storage device stores the heat in the heat storage device. The placed heat medium is supplied to the engine body before or at the start of the internal combustion engine, and after the engine is started, the heat medium is circulated through a path including the engine body, excluding the heat storage device. A part of the medium is supplied to a portion other than the engine main body which needs to be heated without passing through the heat storage device.

[0008] The internal combustion engine provided with the heat storage device of the present invention is composed of the above-mentioned essential components, but is established even when the components are specifically as follows. The specific constituent element is a drive device having a heat exchanger for exchanging heat between a heat medium and hydraulic oil via the engine main body at a portion requiring a temperature increase other than the engine main body. I do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an internal combustion engine provided with a heat storage device according to the present invention will be described below with reference to the accompanying drawings. [First Embodiment] A first embodiment will be described with reference to FIGS.

FIG. 1 is a schematic overall view of an internal combustion engine provided with a heat storage device according to the present embodiment. The engine cooling water as a heat medium which has been heated to a high temperature during operation of a gasoline engine I which is an internal combustion engine. (Hereinafter referred to as “high-temperature engine cooling water”) is stored in the heat retaining container 3 of the heat storage device 1, and the high-temperature engine cooling water is transferred from the heat retaining container 3 to the heat medium circulation path before or at the time of starting the engine I. Engine cooling water circuit 5
Through a water jacket 7 formed in the engine body 2 which is a required temperature rise portion, and other required temperature rise portions, for example, a vehicle heater 9 as an indoor heating device, an ATF
The state in which engine cooling water is supplied to the warmer 21 and the like is shown.

Here, at the time of starting, the crankshaft is rotated by an engine start assisting means such as a starter motor attached to the engine main body 2 so that the piston reciprocates in the cylinder. That is, the engine I is in a so-called cranking state,
Means that the vehicle is in a state where it can start operating independently independently of the starter motor. In addition, it means a state in which after starting, the engine I operates independently without using the starter motor.

The ATF warmer 21 is a hydraulic oil of an automatic transmission (hereinafter referred to as "AT") 22, which is one of the driving devices for transmitting the power of the engine I to the wheels when the engine cooling water temperature is equal to or higher than a predetermined temperature. A
A heat exchanger that exchanges heat between T oil (hereinafter referred to as "ATF") and engine cooling water.
There are two. Therefore, the ATF warmer 21 and the AT 22 are connected via an oil passage 22a through which the ATF flows. The ATF installed on the engine cooling water circuit 5
In the warmer 21, the engine cooling water flowing through the engine cooling water circulation path 5 and the ATF from the AT 22 via an oil path 22a.
Heat is exchanged with the ATF circulated to the warmer 21 to increase the temperature of the ATF, thereby realizing early warm-up of the AT 22. Therefore, the supply of the engine cooling water to the ATF warmer 21 is not directly performed by the AT 22.
That is, the AT 22 performs heat exchange between the high-temperature engine cooling water and the ATF via the ATF
Is heated, and the AT22 is warmed by introducing the high-temperature ATF into the AT22. Therefore, the indirect warming using the high-temperature engine cooling water stored in the heat storage device 1 is performed. It can be said that. However, the use of the high-temperature engine cooling water is still the same as warming up and raising the temperature. As described above, the ATTF warmer 21 has an attribute of AT22. Therefore, it can be said that the AT 22 is also a place requiring a temperature rise.

As described above, even if the engine cooling water stored in the heat storage device 1 is not directly supplied, a portion where the temperature is increased as a result of utilizing the heat of the engine cooling water is also referred to as a portion requiring a temperature increase.

The heat carried by the high-temperature engine cooling water at the time of the supply can increase the temperature of the portion requiring the temperature increase before the engine is started, that is, even when the engine I is stopped.

Therefore, the heat insulation container 3 is provided with a space between the inner and outer two-layer wall members so that the temperature of the engine cooling water stored therein can be maintained for a long time, that is, heat can be stored.
This space is a vacuum bottle, such as a thermos, in which the degree of heat conduction, convection and radiation is reduced by vacuuming.

The inner wall of the heat retaining container 3 is filled with a heat storage material (not shown), whereby a heat storage space is defined in the heat retaining container 3 and the high-temperature engine cooling water is stored in the space.

The heat retaining container 3 is provided with an engine cooling water supply pipe 13 for supplying the high temperature engine cooling water secured during the previous operation of the engine from the engine cooling water circulating path 5, and the high temperature engine cooling water is supplied from the heat retaining container 3 to the engine. An engine cooling water discharge pipe 15 for discharging to the cooling water circulation path 5 is attached. Further, the engine cooling water supply pipe 13 is provided with an electric water pump 18 for forcibly circulating the engine cooling water through the engine cooling water circulation path 5.
The electric water pump 18 circulates engine cooling water by assisting an engine mechanical water pump (hereinafter, referred to as “mechanical W / P”) provided on the engine main body 2 while the engine I is operating. If I has not started yet, only the electric water pump 18 is operated to circulate engine cooling water.

That is, the engine cooling water receives the pump pressure of the mechanical W / P and the electric water pump 18 and is arranged on the heat retaining container 3 → the engine cooling water discharge pipe 15 → the engine cooling water circulation path 5 and the supply destination of the engine cooling water. Device 20 for selecting the filter → valve device 20
Before the engine I is started, the water is circulated in the order of the water jacket 7, the heater 9 for the passenger compartment, the ATF warmer 21, etc., the engine cooling water supply pipe 13 → the heat retaining container 3, which is selected by Further, even after the start, the warm-up of the above-mentioned temperature-raising-required portion is promoted as needed.

The valve device 20 is provided with first to fourth openings i to iv. The first opening i communicates with the engine cooling water circulation path 5 communicating with the engine I side, the second opening ii communicates with the engine cooling water circulation path 5 communicating with the ATF warmer 21, and the third opening iii communicates with the heat storage device 1. And a fourth opening i which communicates with the engine cooling water circuit 5
v is in communication with the engine cooling water circulation path 5 communicating with the vehicle interior heater 9.

The valve device 20 is provided, when necessary, to flow engine cooling water only from the third opening iii leading to the heat storage device 1 to the first opening i leading to the engine I side.
(See FIG. 2) and a case B in which the engine cooling water flows only from the third opening iii that communicates with the heat storage device 1 toward the second opening ii that communicates with the ATF warmer 21 (see FIG. 3).
And the case C (see FIG. 4) in which the engine cooling water flows only from the fourth opening iv side leading to the vehicle interior heater 9 to the first opening i leading to the engine I side.

As described above, the valve device 20 has the four openings i in order to exhibit the function of selecting the flow direction of the engine cooling water.
Iv, the valve device 20 is hereinafter referred to as a four-way valve 20 unless otherwise specified. Also,
The presence of the four-way valve 20 in the case A, the case B, and the case C means that the four-way valve 20 is at the position A, the position B, and the position C, respectively.

Reference numerals 29 and 31 are provided in a cabin and a temperature sensor which is attached to the outlet of the water jacket and detects the temperature of the engine cooling water flowing therethrough, when the heat storage device 1 is not operating normally. The alarm lamp warns a driver or a passenger that there is an abnormality in the heat storage device 1 having the PTC heater 23 or the battery 24. The engine cooling water temperature detected by the temperature sensor 29 is referred to as an engine outlet water temperature.

The electric water pump 18 and the four-way valve 2
The 0, temperature sensor 29 and abnormal lamp 31 are connected to the ECU 19 that controls the entire internal combustion engine.

The ECU 19 is composed of a digital computer and includes the following well-known components (not shown).

That is, the ECU 19 comprises a ROM (Read Only Memory) connected to each other by a bidirectional bus,
It has at least a RAM (random access memory), a CPU (microprocessor), an input interface circuit, and an output interface circuit.

The input interface circuit is a temperature sensor 2
9 and the like, and the output values of these instruments are input as electrical signals from the input interface circuit into the ECU 19, and the electrical signals are temporarily stored in the random access memory RAM.

Various application programs and various maps are stored in the read-only memory ROM. When the CPU executes the application programs in accordance with the operating state of the internal combustion engine, the maps and the output are executed according to the time. A signal is transmitted through a bidirectional bus to a read only memory ROM or the random access memory R.
It is called from the AM and used for execution of the application program. Then, based on the result, various devices such as the injector electrically connected to the output interface circuit, the four-way valve 20, the abnormal lamp 31, and the like are activated.

Further, an application program described below for controlling the circulation of the engine cooling water is also included in the ROM.

The application program will be described with reference to FIGS. 5 and 6, respectively.

The application program shown in FIGS. 5 and 6 includes steps 101 to 113. A program including these steps is stored in the ROM of the ECU 19, and is called up as needed. The processing in each of the above steps is entirely performed by the CPU of the ECU 19. Note that the symbol S is used and, for example, if it is step 101, it is abbreviated as S101. Although FIGS. 5 and 6 should normally be shown collectively on the same paper, they are separated by the space of the paper. The reference numeral (1) shown in FIG. 5 and the reference numeral (1) shown in FIG. 6 correspond to each other, and guide the transition destination of the process from FIG. 5 to FIG.

In FIG. 5, after starting the engine I,
When the process proceeds to this routine, in S101, the position of the four-way valve 20 is maintained at the position A (see FIG. 2) which is a state before the start of the engine I. At this time, as shown in FIG. 7, the engine cooling water is discharged from the heat retaining container 3 → the engine cooling water discharge pipe 15 →
The circulation is performed in the order of the opening iii of the four-way valve 20, the opening i, the water jacket 7, the ATF warmer 21, the engine cooling water supply pipe 13, and the heat retaining container 3. Note that the four-way valve 20 is located at the position A.
3 and FIG. 8 and FIG. 9 (which will be described later) showing the flow of the engine cooling water corresponding to the positions B and C, respectively, when the engine cooling water is at the position C. The portion corresponding to each position is indicated by a path with a thick solid line arrow, the remaining engine cooling water circulation path 5 is indicated by a broken line, and the path indicated by the broken line is in a closed state. 7 to 1 including FIG. 10 described later.
Since 0 indicates the path through which the engine cooling water flows,
It is a disclosure of the minimum necessary components.

In step S102, the temperature sensor 2 determines whether the engine outlet water temperature immediately after the start of the engine I is equal to or higher than a predetermined temperature.
9 to determine. The predetermined temperature means, for example, a temperature effective for realizing early warm-up of the AT 22. In this embodiment, the predetermined temperature is exemplified as 50 ° C.

If the determination is affirmative in S102, the process proceeds to S105, and if the determination is negative, the process proceeds to S103.

In S103, the electric water pump 18 is turned on. In addition. Since it is assumed that the engine I has started, the mechanical W / P is also operating. Therefore, although the engine cooling water is circulating in the engine cooling water circulation path 5, when the electric water pump 18 is turned on and operates, the engine cooling water stored in the heat retaining container 3 of the heat storage device 1 becomes necessary. Accordingly, it can be promptly supplied to any of the above-mentioned locations requiring a rise in temperature.

In S104, it is determined whether a predetermined time has elapsed since the electric water pump 18 was turned on in S103. Here, the predetermined time is a time required for the engine cooling water temperature to reach the temperature of 50 ° C. or more after the start of the engine I, and is a value obtained empirically. In this embodiment, the predetermined time is set to 20 sec. Illustrated. S10
If an affirmative determination is made in S4, the process proceeds to S105, and if a negative determination is made, this routine is repeated.

In S105, the four-way valve 20 is set to the position B (see FIG. 3) so that the engine cooling water stored in the heat retaining container 3 flows from the heat storage device 1 side to the ATF warmer 21 side. At this time, the first opening i of the four-way valve 20 is closed, so that when the four-way valve 20 is at the position A (see FIG. 2), the water jacket 7 and the first
The engine cooling water circulation path 5 connecting the opening i of the engine cooling water is closed (see the engine cooling water circulation path 5 indicated by a broken line connecting the water jacket 7 and the first opening i of the four-way valve 20 in FIG. 8). Therefore, after the engine is started, the state in which the engine cooling water is circulated through the path (see the arrow A1 in FIG. 8) of the engine cooling water circulation path 5 excluding the heat storage device 1 and including the engine main body 2 is maintained. . In other words, after starting the engine,
A state in which a part of the engine cooling water circulates in the water jacket 7 provided in the engine main body 2 without passing through the heat storage device 1 is maintained. At the same time, the remaining engine cooling water is
As indicated by the arrow A2, the engine cooling water discharge pipe 15 → the opening i of the four-way valve 20 starts from the heat retaining container 3 of the heat storage device 1.
ii → the opening ii → the ATF warmer 21 → the engine cooling water supply pipe 13 → the heat retaining container 3 in this order.

Therefore, both in the case of a negative determination in S102 and in the case of an affirmative determination, the engine cooling water is supplied to the ATF warmer 21, where it contributes to the early warm-up of the AT 22 by heat exchange between the engine cooling water and the ATF.

At S106, the engine outlet water temperature is set at S102.
It is determined whether the temperature is equal to or higher than another predetermined temperature higher than the predetermined temperature. The predetermined temperature in S106 is, for example, the vehicle interior heater 9
Means effective temperature for realizing early warm-up. However, the predetermined temperature differs depending on the type of the target engine, and is higher in the case of the lean-burn engine than in the case of the normal gasoline engine. In this case, for example, 60 ° C. or more is desirable. When the temperature of the engine cooling water is higher than the temperature, the internal combustion engine is in a state where the engine warm-up is over, and the engine warm-up proceeds to such an extent that it is no longer expected to reduce the friction of the engine I or improve the emission further. State. This state is referred to as a predetermined state in the present embodiment.

If an affirmative determination is made in S106, the routine proceeds to S107, and if a negative determination is made, this routine is repeated.

In step S107, the electric water pump 18 is turned on.
The FF is set and the four-way valve 20 is set at the position C (see FIG. 4) so that the engine cooling water flows from the water jacket 7 from the vehicle interior heater 9 toward the engine I. At this time, as shown in FIG. 9, the engine cooling water is supplied to the heater 9 for the passenger compartment → the opening iv of the four-way valve 20 → the opening i → the water jacket 7 → the ATF warmer 21 → the engine cooling water supply pipe 1
3 → circulation in the order of the heater 9 for the passenger compartment.

Therefore, when the four-way valve 20 is in the position B and the position C
Above for the flow path of the engine cooling water when
From the description of 105 to S107, after the engine is started, the state in which the engine cooling water is circulated in the engine cooling water circulation path 5, which is the path including the engine main body 2, except for the heat storage device 1 is maintained until the engine reaches the predetermined state. In addition, it can be said that the engine cooling water stored in the heat storage device 1 is supplied to the ATF warmer 21 (AT22), which is a portion other than the engine main body, which needs to be heated.

In the next step S108, it is determined whether or not the engine I is stopped.
If a negative determination is made, this routine is repeated.

In S109, the four-way valve is moved to the position A (see FIG. 2).
And the heat storage container 3 is moved from the heat storage device 1 side to the engine I side.
The cooling water stored in the engine.

In step S110, even when the engine I is stopped, the engine outlet water temperature is reduced to S106 before the engine is stopped.
It is determined whether the temperature is equal to or higher than the predetermined temperature described in the above. If the determination is affirmative, the process proceeds to S111; if the determination is negative, the process proceeds to S11.
Proceed to 3.

In step S111, the electric water pump 18 is turned on.
Set to N. At this time, since the engine I is already stopped, the mechanical W / P is in a stopped state (S1).
08), and by operating the electric water pump 18, the engine cooling water stored in the heat retaining container 3 of the heat storage device 1 can be supplied to a portion requiring a temperature increase.

In S112, it is determined whether a predetermined time has elapsed since the electric water pump 18 was turned on in S111. The term “predetermined time” here means that the high-temperature engine cooling water stored in the heat-retaining container 3 of the heat storage device 1 is discharged from the heat-retaining container 3 in an amount sufficient to effectively function in performing the engine warm-up. The time required for The engine cooling water flows from the engine cooling water circulation path 5 into the heat retaining container 3 in such a way as to replace the discharge.

If an affirmative determination is made in S112, the process proceeds to S113, and if a negative determination is made, this routine is repeated.

In S113, the electric water pump 18 is turned on.
FF is performed, and a series of operations is completed.

At this time, the position of the four-way valve 20 is maintained at the position A, and the position is adjusted in advance before the next circulation of the engine cooling water (see FIG. 10). [Operation and Effect of First Embodiment] The operation and effect of the first embodiment will be described.

According to the engine I of the present embodiment, the engine cooling water stored in the heat retaining container 3 of the heat storage device 1 is supplied with the water jacket 7 before or at the start of the engine.
AT, which is a location requiring a temperature increase other than the engine body 2
22 to the ATF warmer 21. Therefore, if the stored engine cooling water is in a high temperature state, simply supplying the high temperature engine cooling water to the engine main body 2 and other places requiring a temperature rise can contribute to early warm-up.

After the engine is started, the heat storage device 1 is kept warm while keeping the state in which the engine cooling water is circulated in the engine cooling water circulation path 5, which is a path including the water jacket 7 belonging to the engine body, excluding the heat storage device 1. The engine cooling water stored in the container 3 is heated at a location other than the main body of the engine, which is an AT.
Provide to F warmer 21 (AT22). In other words, after the engine is started, the engine cooling water is circulated through the water jacket 7 in the engine body 2 without passing through the heat storage device 1 until the engine reaches a predetermined state. The stored engine cooling water is supplied to the ATF warmer 21 (AT22), which is a portion other than the engine body 2 that needs to be heated (see FIGS. 8 and 9). Accordingly, the engine cooling water A1 warming only the water jacket 7 is used as the engine cooling water.
And the engine cooling water A2 stored in the heat storage device 1 for warming up a portion requiring a temperature increase other than the water jacket 7. For this reason, the engine cooling water A1 that warms up only the water jacket 7 does not lose its heat.
The heat loss is small accordingly. Therefore, promotion of engine warm-up can be effectively achieved. The engine cooling water A2 is stored in the heat storage device 1
Since the temperature of the stored engine cooling water is high, the ATF
Since heat exchange in the warmer 21 is promoted, warming-up of the AT 22 connected to the ATF warmer 21 via the oil passage 22a can be promoted.

Therefore, the early warm-up of the engine body 2 and the drive unit is promoted, so that the emission can be reduced effectively.

In the first embodiment, a gasoline engine is used as an example of the internal combustion engine. However, the present invention is not limited to this, and the present invention can be applied to a diesel engine and other lean-burn engines. Second Embodiment Next, an internal combustion engine equipped with a heat storage device according to a second embodiment will be described with reference to FIGS.

The internal combustion engine provided with the heat storage device according to the second embodiment differs from the internal combustion engine provided with the heat storage device according to the first embodiment in the following points.

That is, in the case of the internal combustion engine equipped with the heat storage device according to the first embodiment, the engine cooling water circuit 5 excluding the heat storage device 1 and including the engine body 2 (see the path shown by the thick broken line in FIG. 11). While maintaining the state in which the engine cooling water is circulated, the heat medium stored in the heat storage device is supplied to, for example, the AT 22 which is a place requiring a temperature rise other than the engine main body 2, whereas the second embodiment In the case of an internal combustion engine equipped with a heat storage device according to the embodiment, the heat medium is circulated through a path including the engine body after removing the heat storage device after starting the engine,
Thereafter, a part of the circulating engine cooling water is supplied to a place requiring a temperature increase other than the engine body 2 without passing through the heat storage device.

In the second embodiment, a difference in configuration is shown in a case where a diesel engine is applied to an internal combustion engine. In addition, the second embodiment discloses a combustion type heater 32 and an EGR cooler 35 used for warming up the engine as components not shown in the first embodiment.

Also, there is no four-way valve 20 shown in the first embodiment, but a flow path switching valve 20A is provided instead. The flow path switching valve 20A is a three-way valve having openings (1) to (3), and the necessary openings are opened and closed when necessary.

Further, as not shown in the first embodiment, an engine oil cooler 33 and a flow control valve (electronic thermo) 37 are shown in the second embodiment. In the first embodiment, a mechanical W / P and a radiator, which are not shown, are indicated by reference numerals 39 and 41 in the second embodiment.

For the same parts as those in the first embodiment, refer to the first embodiment.

FIG. 11 is a schematic overall view of an internal combustion engine provided with a heat storage device according to this embodiment. And this FIG.
The diesel engine I stores engine cooling water (hereinafter, “high-temperature engine cooling water”) as a heat medium heated to a high temperature during operation of the diesel engine I in the heat retaining container 3 of the heat storage device 1. Prior to or at the time of starting the engine I, water is returned from the insulated container 3 to the engine cooling water circulation path 5, which is a heat medium circulation path, via the engine cooling water discharge pipe 15, and the water jacket formed in the main body 2 of the engine I This indicates that the engine cooling water can be supplied to other parts, such as the vehicle interior heater 9 and the ATF warmer 21 of the AT 22, which are required to raise the temperature, via the control unit 7.

In the case of the diesel engine I, even when the engine is stopped, the engine cooling water is supplied to the above-mentioned required temperature rising portion, and the heat carried by the high-temperature engine cooling water at that time causes the above-mentioned required temperature rising portion. Temperature can be raised. [Operation and Effect of Second Embodiment] Next, the second embodiment having such a configuration will be described.
The operation and effect of the embodiment will be described with reference to FIGS. In these figures, a portion indicated by a thick solid line arrow in the engine cooling water circulation path 5 indicates a path of the engine cooling water in each of the following cases.

FIG. 12 is a diagram showing the path of the engine cooling water in the case where warm-up performed before or at the time of starting the engine I, that is, instantaneous warm-up is performed. More specifically, a circulation path for circulating engine cooling water when the engine I is not yet driven by itself is shown. In this case, the openings (1) and (3) of the flow path switching valve 20A are opened so that they are in communication with each other, but the opening (2) is closed. Therefore, the opening (2) is not in communication with the openings (1) and (3). Then, the electric water pump 18 is operated in this state. As a result,
The high-temperature engine cooling water stored in the heat retaining container 3 of the heat storage device 1 before (immediately before) or at the time of starting the engine is discharged from the engine body 2.
The water is fed into the water jacket 7 formed therein. When the engine cooling water retained in the water jacket 7 is replaced with the high-temperature engine cooling water of the heat storage device 1, the electric water pump 18 is stopped so that the high-temperature engine cooling water is confined in the engine. That is, the water jacket 7, which is a place where the temperature needs to be raised, is directly warmed up by the heat carried by the high-temperature engine cooling water, and the temperature of the water jacket 7 is increased. The time required for replacing the engine cooling water circulation path is obtained in advance by experiments or the like.
The flow of the engine cooling water in this case will be described with the thick solid line arrow. Starting from the heat retaining container 3 of the heat storage device 1 which is the supply source of the engine cooling water, the engine cooling water discharge pipe 15 → the engine cooling water circulation path 5 → the water The jacket 7 → the mechanical W / P 39 → the engine cooling water circulation path 5 → the opening (1) of the flow path switching valve 20A → the opening (3) → the engine cooling water supply pipe 13 → the circulation vessel 3 in this order.

FIG. 13 is an explanatory view of a case where rapid warm-up is performed immediately after the engine is started. The openings (1), (2), and (3) of the flow path switching valve 20A are all in a non-communicating state, and The electric water pump 18 is deactivated. As a result,
Until then, the engine cooling water flowing along the route of FIG.
Circulating only for the water jacket 7. In other words, the heat medium is circulated in a path excluding the heat storage device 1 and including the engine body 2. If the flow of the engine cooling water in this case is indicated by an arrow, it circulates in the order of the water jacket 7 → the engine cooling water circulation path 5 → the flow control valve 37 → the engine cooling water circulation path 5 → the mechanical W / P 39 → the water jacket 7. The path through which the engine cooling water circulates is indicated by reference numeral 40.

After the engine I is started, the circulation of the engine cooling water in the path 40 continues until the engine I reaches a predetermined state. The predetermined state refers to a state in which the engine cooling water temperature has increased to a predetermined temperature, that is, a state in which it is not expected that the friction of the engine I or the emission will be further improved. This state varies depending on the type of the engine and the size of the displacement, but there is a case where the temperature of the engine cooling water becomes, for example, 60 ° C. or more.

At this time, the engine cooling water in the heat retaining container 3 of the heat storage device 1 is kept stored in the heat retaining container 3 as it is.

FIG. 14 shows that a part of the engine cooling water of the water jacket 7 is supplied to the ATF warmer 21 or the engine oil cooler 3 when the engine cooling water temperature becomes equal to or higher than the predetermined temperature.
3, a state where the air is also supplied to the EGR cooler 35 is shown. However, at this time, the engine cooling water has not yet flowed into the heat storage device 1.

More specifically, after the engine is started and after the predetermined state is reached, the openings (1) and (3) of the flow path switching valve 20A are opened to communicate with each other, and the opening (2) is disconnected. I do. At this time, the electric water pump 18 is in a non-operating state. As a result, a portion of the engine cooling water that has been flowing only through the path 40 shown in FIG. 13 comes out of the path 40 and receives the pump pressure of the mechanical W / P 39, and the engine cooling water flows through the path 40. Water circuit 5 → engine oil cooler 33 →
ATF warmer 21 → EGR cooler 35 → engine cooling water circulation path 5 → opening of passage switching valve 20A (3) → opening (1)
The engine cooling water circulating path 5 circulates in the order of the path 40.

That is, after the engine is started, the engine cooling water is circulated through the path 40 excluding the heat storage device 1 and including the engine main body 2 (water jacket 7). A part of the engine cooling water is supplied to the AT 22 or the like, which is a place where the temperature needs to be raised, other than the engine body 2 without passing through the heat storage device 1. Therefore, at this time, the engine cooling water in the heat retaining container 3 of the heat storage device 1 maintains the state in which the engine cooling water replaced at the time of the instant warm-up in FIG. .

FIG. 15 is an explanatory view of the case where the engine cooling water is supplied to the heat storage device 1 when the waste heat is recovered (heat storage), and the high-temperature engine cooling water after the engine I is warmed is supplied to the flow path switching valve 20A.
The openings (1) and (3) are opened to communicate with each other, and high-temperature engine cooling water is supplied from the water jacket 7 to the heat retaining container 3 of the heat storage device 1 by the electric water pump 18. At this time, the route of the engine cooling water supplied to the heat retaining container 3 of the heat storage device 1 is not limited as long as it passes through the water jacket 7.

According to the second embodiment having such a configuration,
The engine cooling water of the heat medium stored in the heat storage device 1 is supplied to the engine main body 2 before or at the time of starting the internal combustion engine I.
Therefore, if the stored engine cooling water is in a high temperature state, only the high temperature engine cooling water is supplied to the engine body 2 to contribute to early warm-up.

Further, since the heat storage device 1 is removed and the path 40 including the engine main body 2 is circulated after the engine is started, in other words, the internal combustion engine I is exclusively passed without passing through the heat storage device 1 until the internal combustion engine I reaches the predetermined state. Since the engine cooling water is circulated through the engine main body 2, heat of the engine cooling water is intensively supplied to the engine main body 2. Therefore, heat loss is reduced by the amount not passing through the heat storage device 1. As a result, the heat storage device 1
Since the heat is not deprived, the warm-up of the engine is promoted.

Further, after the engine cooling water circulates through the path 40, more specifically, after the internal combustion engine I has reached the predetermined state, a part of the engine cooling water circulating with respect to the engine body 2 is transferred to the heat storage device. The heat loss is reduced because the heat is supplied to the AT 22 or the like, which is a place other than the engine body 2, which needs to be heated without passing through the engine body 1. Therefore, it is possible to promote the warming-up of a portion other than the engine main body 2 which needs to be heated.

As a result, heat loss is reduced as compared with the case where the engine cooling water passes through the heat storage device 1, so that early warm-up is promoted accordingly. Thus, emission can be effectively reduced.

The solid drive device in each of the above-described embodiments is the AT22, but is used for a continuously variable transmission CVT, a four-wheel drive vehicle, and a transfer device for distributing power from the transmission to the front and rear wheels and other driving devices. Needless to say, the device may be used.

The hydraulic oil for the drive unit may be lubricating oil for preventing power loss or metal wear in the drive unit, or control oil used for a torque converter of an automatic transmission. Note that application to an engine other than the diesel engine, for example, a lean burn engine is also conceivable.

[0076]

As described above, according to the internal combustion engine provided with the heat storage device of the present invention, it is possible to quickly warm up the engine cooling water flowing into the engine body and the operating oil of the drive device by reducing the heat loss. Can be.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a first embodiment of an internal combustion engine provided with a heat storage device of the present invention.

FIG. 2 shows a position A of a four-way valve.

FIG. 3 shows a position B of a four-way valve.

FIG. 4 is a diagram showing a position C of a four-way valve.

FIG. 5 is a flowchart for explaining an application program according to the first embodiment;

FIG. 6 is a flowchart continued from FIG. 5 and illustrating an application program according to the first embodiment;

FIG. 7 is a diagram showing a circulation path of engine cooling water in the first embodiment.

FIG. 8 shows another circulation path.

FIG. 9 is a view showing another circulation path;

10 returns to the state of FIG. 7 and prepares for the next circulation.

FIG. 11 is an overall schematic diagram of a second embodiment of an internal combustion engine provided with the heat storage device of the present invention.

FIG. 12 is a diagram showing a circulation path of engine cooling water in a second embodiment.

FIG. 13 shows another circulation path.

FIG. 14 is a view showing another circulation path;

FIG. 15 is a diagram showing another circulation path;

[Explanation of symbols]

I Engine (internal combustion engine) 1 Heat storage device 2 Engine main body (necessary temperature increase) 3 Insulation vessel 5 Engine cooling water circulation path (heat medium circulation path) 7 Water jacket (necessary temperature increase) 9 Vehicle heater (other than engine main body) 13 Engine cooling water supply pipe 15 Engine cooling water discharge pipe 18 Electric water pump 19 ECU 20 Valve device (four-way valve) 20A Flow switching valve (1) Opening of flow switching valve (2) Flow Opening of the switching valve (3) Opening of the flow path switching valve 21 ATF warmer (necessary temperature increase other than the engine body) 22 AT (necessary temperature increase other than the engine body) 22a Oil passage 23 PTC heater 24 battery 29 temperature sensor 31 Error lamp 32 Combustion heater 33 Engine oil cooler 35 EGR cooler 37 Flow control valve (electronic thermo) 39 Mechanical W / P 40 Excluding heat storage device and Path including engine body A1 Circulating path of engine cooling water (path excluding heat storage device and including engine body) A2 Circulating path of engine cooling water i First opening of four-way valve ii Second opening of four-way valve iii Four-way valve Iv fourth opening of four-way valve

Claims (3)

[Claims] 1. A heating medium that is heated during operation of an internal combustion engine is stored, and the heating medium is supplied to an engine body and other places requiring a temperature rise. A heat storage device that stores heat by maintaining the temperature of the heat medium so as to increase the temperature of the heat medium, wherein the heat medium stored in the heat storage device is prior to or at the time of starting the internal combustion engine. After passing through the engine main body, it is supplied to a required temperature rise portion other than the engine main body, and is stored in the heat storage device while maintaining a state in which the heat medium is circulated through a path including the engine main body, excluding the heat storage device after the engine is started. An internal combustion engine provided with a heat storage device, wherein the heat medium is supplied to a portion other than the engine main body, which needs to be heated. 2. A heat medium heated during operation of an internal combustion engine is stored, and the heat medium is supplied to the engine body and other places requiring a temperature rise. A heat storage device that stores heat by maintaining the temperature of the heat medium so as to increase the temperature of the heat medium, wherein the heat medium stored in the heat storage device is prior to or at the time of starting the internal combustion engine. After the engine is started, the heat medium is circulated through a path including the engine body, excluding the heat storage device, and thereafter, the engine body without passing a part of the circulating heat medium through the heat storage device. An internal combustion engine provided with a heat storage device, wherein the internal combustion engine is provided to a place requiring a temperature rise other than the above. 3. A drive unit having a heat exchanger for exchanging heat between a heat medium and hydraulic oil passing through the engine main body, where the temperature is required to be raised other than the engine main body. An internal combustion engine provided with the heat storage device according to 1 or 2.