JP5381851B2 - Refrigerant flow control device and vehicle cooling device - Google Patents

Description

  The present invention relates to a refrigerant flow control device and a vehicle cooling device.

  The water-cooled internal combustion engine has a cooling water circulation passage inside, and the cooling water in the circulation passage is circulated to the radiator side by the operation of the water pump to cool the cooling water. The internal combustion engine is cooled by circulating it to the internal combustion engine side.

  Conventionally, as a cooling device for such an internal combustion engine, a rotary valve device has been arranged in a flow path from a radiator, a flow path from a heater core, a bypass flow path, and a suction flow path of a pump device, and each flow path is restricted or blocked. The temperature of the internal combustion engine is controlled to the target temperature adapted to the operating state by controlling the valve so that the target water temperature is determined based on the engine speed, the accelerator opening, etc. The technique is described in Patent Document 1.

  Further, as a hybrid vehicle cooling device including an internal combustion engine and a drive motor, an engine cooling circuit that cools the internal combustion engine and a high-power system cooling circuit that cools the drive motor are provided. Patent Document 2 discloses a technique for efficiently cooling the internal combustion engine and the drive motor while switching the switching valve of each cooling circuit in accordance with the load while avoiding an increase in the size of the cooling system.

JP 2002-038949 A JP 2004-324445 A

  The internal combustion engine has different cooling requirements at low load operation such as warm-up operation and high load operation at high output and high rotation. It is desirable to circulate cooling water having an appropriate temperature according to the requirement. However, since the technique of Patent Document 1 restricts or blocks the flow path of the cooling water on the suction side of the water pump, it cannot control the discharge side of the cooling water. Therefore, since the cooling system cannot be diversified, there is a problem that it is difficult to circulate cooling water having an appropriate temperature to each part of the internal combustion engine.

  On the other hand, the technology of Patent Document 2 has two cooling systems for cooling the internal combustion engine and cooling the drive motor, but it is required to provide a separate switching valve for controlling each cooling system. The Therefore, there is a problem that it is difficult to further simplify and downsize the cooling system.

  The present invention has been made in view of the above points, and an object thereof is to provide a refrigerant flow control device and a vehicle cooling device that can circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration. And

In order to achieve the above object, a refrigerant flow control device of the present invention includes a first refrigerant introduction unit that introduces a refrigerant therein, and a plurality of second refrigerants that can discharge the refrigerant introduced from the first refrigerant introduction unit to the outside. A first pipe having a first refrigerant discharge section, a second refrigerant introduction section that is fitted inside the first pipe and introduces a refrigerant introduced from the first refrigerant introduction section, and the second A second pipe having a plurality of second refrigerant discharge portions capable of discharging the refrigerant introduced from the refrigerant introduction portion to the outside, and the first refrigerant discharge portion to which any of the second refrigerant discharge portions corresponds communicates. Driving means for driving the second pipe so as to move to a position, and the second pipe is fitted inside the first pipe so as to be rotatable around a major axis by the driving force of the driving means. And the second refrigerant discharge portion is adapted to correspond to the rotational phase around the long axis of the second pipe. It arrange | positions at the said 2nd pipe | tube so that a 1st refrigerant | coolant discharge part can communicate, The said 2nd pipe | tube is connected with the edge part of the longitudinal direction of the said 1st 2nd pipe by the 1st 2nd pipe | tube and a connection part. The second second pipe, and the first second pipe and the second second pipe are configured such that refrigerants flowing through the inside cannot pass through each other. The second pipe and the second second pipe are respectively provided with the second refrigerant introduction part and the second refrigerant discharge part, and there are a plurality of the second refrigerant discharge parts of the second second pipe. The second refrigerant introducing portion of the second second pipe is provided at an end portion of the second second pipe facing the first second pipe, and a plurality of the second second pipes are provided. the second refrigerant discharge portion, characterized in that are provided in different positions in the long-axis direction in the side surface along the axial direction of the second second tube To.
With the above configuration, by driving the position of the second pipe in the first pipe, the refrigerant introduced from the refrigerant introduction section can be made to communicate with the arbitrary first refrigerant discharge section and the second refrigerant discharge section. It can distribute | circulate from the arbitrary 1st refrigerant | coolant discharge parts to the exterior of a 1st pipe | tube. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration.

In addition, with the above configuration, by controlling the rotational phase around the major axis of the second pipe inside the first pipe, the arbitrary first refrigerant discharge section and the second refrigerant discharge section can be communicated to introduce the refrigerant. The refrigerant introduced from the section can be circulated from the arbitrary first refrigerant discharge section to the outside of the first pipe. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration. Further, with the above configuration, the cooling system can be at least two systems, and the cooling water can be circulated independently in each cooling system. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration.

In the refrigerant flow control device of the present invention, the driving means controls the area of the communication portion when the arbitrary second refrigerant discharge portion communicates with the corresponding first refrigerant discharge portion. It can be set as the structure which adjusts the discharge amount of the refrigerant | coolant discharged | emitted from 1 refrigerant | coolant discharge part.
With the above configuration, by controlling the area of the communication portion when the first refrigerant discharge portion and the second refrigerant discharge portion are communicated with each other, the flow from the arbitrary first refrigerant discharge portion to the outside of the first pipe is circulated. The circulation amount of the refrigerant can be adjusted. Therefore, it is possible to circulate an appropriate amount of cooling water to each part of the vehicle with a simple configuration.

Moreover, this invention is a cooling device of a vehicle provided with the refrigerant | coolant distribution control apparatus of Claim 1 or 2 .

The vehicle cooling device of the present invention can be configured such that the oil cooler cooling path is provided downstream of the cylinder head cooling path.
With the above configuration, the temperature of the oil can be increased by circulating the refrigerant having received heat through the cylinder head to the oil cooler.

Furthermore, the vehicle cooling device of the present invention can be configured such that the refrigerant flow control device adjusts the discharge amount of the refrigerant in accordance with the load of the internal combustion engine.
With the above configuration, an appropriate amount of refrigerant can be circulated to the cooled portion according to the load of the internal combustion engine.

  According to the refrigerant flow control device and the vehicle cooling device of the present invention, by controlling the position of the second pipe inside the first pipe, any first refrigerant discharge portion and the second refrigerant discharge portion are made to communicate with each other. Thus, the refrigerant introduced from the refrigerant introduction unit can be circulated from the arbitrary first refrigerant discharge unit to the outside of the first pipe. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration.

It is the figure which showed one structural example of the vehicle cooling system of an Example. An example of attachment of a refrigerant distribution control device is shown. It is the figure which showed the example of 1 structure of the refrigerant | coolant distribution control apparatus of an Example. An example of communication control between the first refrigerant discharge part and the second refrigerant discharge part based on the rotation phase around the major axis of the second pipe is shown. An example of control executed by the ECU is shown. An example of a fuel efficiency map during a large amount of EGR and an example of a cooling loss reduction effect due to a high water temperature are shown. It is the figure which showed the example of 1 structure of the refrigerant | coolant distribution control apparatus of an Example. An example of communication control between the first refrigerant discharge part and the second refrigerant discharge part based on the movement position of the second pipe in the long axis direction is shown.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a schematic configuration of a vehicle cooling system 1 incorporating the refrigerant flow control device of the present invention. The present embodiment shows a configuration of a cooling system for a hybrid vehicle including an engine 100 as a first drive source and an electric motor 200 as a second drive source, but is limited to a hybrid vehicle. It is not a thing. In addition, the solid line arrow has shown the flow direction of cooling water.

  The vehicle cooling system 1 shown in FIG. 1 includes a first flow path 21, a second flow path 22, a third flow path 23, a fourth flow path 24, and a fifth flow path through which a refrigerant (cooling water) circulating in the system flows. 25, and a main radiator 26 and a sub radiator 27 for cooling the cooling water. The vehicle cooling system 1 also includes a water pump 28 that circulates the cooling water and water temperature sensors 41 and 42 that detect the temperature of the cooling water. Furthermore, the vehicle cooling system 1 includes a refrigerant flow control device 31 that controls the flow of cooling water circulating through the system, and an ECU (Electronic Control Unit) 10 that comprehensively controls the operation of the system.

  As the cooling water circulating through the vehicle cooling system 1 of the present embodiment, a general LLC (Long Life Coolant) made of an ethylene glycol aqueous solution is applied, but other refrigerants may be used.

The first flow path 21 is configured to branch into the first flow path 21 a and the first flow path 21 b in the middle, and merge again after passing through the refrigerant flow control device 31.
The first flow path 21a is connected from the lower tank of the main radiator 26 to the refrigerant flow control device 31 via the water pump 28, the electric motor 200, and the exhaust heat recovery device 201, and from the refrigerant flow control device 31 via the heater core 103. Then, it is connected to the upstream side of the water pump 28. The first flow path 21a is connected to the first refrigerant introduction portion 316a and the first relief portion 317a of the refrigerant flow control device 31, and while the water pump 28 is driven, the electric motor 200, the exhaust heat recovery device 201, and the heater core. The cooling water circulates at 103 at all times.

The first flow path 21b is branched from the first flow path 21a after passing through the water pump 28 and connected to the refrigerant flow control device 31, and the first flow path 21b is passed from the refrigerant flow control device 31 via the inverter 202 and the EGR cooler 104. It is the structure which joins 21a.
The first flow path 21b is connected to the first refrigerant introduction part 316b and the first relief part 317b of the refrigerant flow control device 31, and cooling water is always supplied to the inverter 202 and the EGR cooler 104 while the water pump 28 is driven. Circulate.
In the first flow path 21b, a bypass flow path 29a is branched between the refrigerant flow control device 31 and the inverter 202. The bypass flow path 29a is connected to the second flow path 22, and includes a first thermostat 29b at a branch portion with the first flow path 21b. The first thermostat 29b opens when the temperature of the cooling water flowing through the first flow path 21b exceeds a predetermined temperature, whereby the first flow path 21b communicates with the sub-radiator 27 and the second flow path 22. The first thermostat 29b opens when the temperature of the cooling water flowing through the first flow path 21b exceeds the temperature at which the inverter 202 and the EGR cooler 104 can be appropriately cooled. Can be set to 70 ° C.

The second flow path 22 is configured to communicate from the refrigerant flow control device 31 to the upper tank of the sub radiator 27 and to be connected from the lower tank of the sub radiator 27 to the first flow path 21b.
The second flow path 22 is connected to the first refrigerant discharge part 312a of the refrigerant flow control device 31, and the first refrigerant discharge part 312a communicates with the second refrigerant discharge part 314a, so that the refrigerant flow control device 31 The sub radiator 27 and the first flow path 21b communicate with each other.

The third flow path 23 branches off from the first flow path 21 a on the downstream side of the branch portion between the first flow path 21 a and the first flow path 21 b, and the refrigerant flow control device via the cylinder head 101 and the oil cooler 105. It is the structure connected to 31.
The 3rd flow path 23 is connected with the 1st refrigerant | coolant discharge part 312b of the refrigerant | coolant distribution control apparatus 31, and when the 1st refrigerant | coolant discharge part 312b is connected with the 2nd refrigerant | coolant discharge part 314b, from the 1st flow path 21a. The cylinder head 101, the oil cooler 105, and the refrigerant flow control device 31 communicate with each other. In this case, it is desirable that the third flow path 23 is configured so that the cooling water that has received heat through the cylinder head 101 circulates to the oil cooler 105.

The fourth flow path 24 is configured to connect the cylinder block 102 and the refrigerant flow control device 31.
The 4th flow path 24 is connected with the 1st refrigerant | coolant discharge part 312c of the refrigerant | coolant distribution control apparatus 31, and when the 1st refrigerant | coolant discharge part 312c is connected with the 2nd refrigerant | coolant discharge part 314c, from the 1st flow path 21a. The cylinder head 101, the cylinder block 102, and the refrigerant flow control device 31 communicate with each other.
In the fourth flow path 24, a bypass flow path 29c is branched between the cylinder block 102 and the refrigerant flow control device 31. The bypass flow path 29 c is connected to the fifth flow path 25 and includes a second thermostat 29 d at a branch portion with the fourth flow path 24. The second thermostat 29d is opened when the temperature of the cooling water inside the fourth flow path 24 exceeds a predetermined temperature, whereby the fourth flow path 24 to the fifth flow path 25 are communicated. The second thermostat 29d is configured to open when the temperature of the cooling water inside the fourth flow path 24 exceeds the temperature at which the cylinder block 102 can be appropriately cooled. For example, the valve opening temperature is 90 ° C. can do.

The fifth flow path 25 is configured to connect the refrigerant flow control device 31 and the upper tank of the main radiator 26.
The fifth flow path 25 is connected to the first refrigerant discharge part 312d of the refrigerant flow control device 31, and the first refrigerant discharge part 312d communicates with the second refrigerant discharge part 314d, so that the refrigerant flow control device 31 The main radiator 26 communicates.

  The main radiator 26 and the sub-radiator 27 are heat radiators composed of an upper tank, a radiator core, and a lower tank. Cooling water that has become high temperature by cooling the part to be cooled flows through the fifth flow path 25 and the second flow path 22 and is guided to the upper tanks of the main radiator 26 and the sub radiator 27 and passes through the radiator core. . The radiator core takes heat and dissipates heat into the air when high-temperature cooling water passes through the radiator core, and is provided with a large number of fins in order to improve heat dissipation efficiency. The cooling water cooled by the radiator core flows through the first flow path 21 and the second flow path 22 from the lower tank and is returned to the cooled portion again.

  The water pump 28 is provided in the 1st flow path 21, and circulates cooling water through the whole system with the rotational force of the impeller with which it is equipped. The water pump 28 employs an electric variable pump that is driven by an electric motor. However, the water pump 28 may be a mechanical type that is driven by transmitting the rotational force of the crankshaft shaft of the engine 100 through a belt, or both types. May be used in combination.

The refrigerant flow control device 31 is attached to the cooling water outlet side of the cylinder head 101 (see FIG. 2), and the cooling water circulation circulating in the vehicle cooling system 1 is downstream of the engine 100 and the electric motor 200 (outlet side). ) To control.
Here, the internal structure of the refrigerant | coolant distribution control apparatus 31 is demonstrated in detail. FIG. 3 is a diagram illustrating a configuration example of the refrigerant flow control device 31 according to the embodiment. The refrigerant flow control device 31 includes a first pipe 311, first refrigerant discharge units 312 a to 3d, second pipes 313 a to b, second refrigerant discharge units 314 a to d, an actuator 315, first refrigerant introduction units 316 a to b, 1 relief part 317a-b, it has the composition provided with the 2nd refrigerant introduction part 318a-b and the 2nd relief part 319, and it is the 1st flow path 21-5th to each of the 1st refrigerant discharge part 312a-d. The path 25 is connected.

  The 1st pipe | tube 311 is a hollow cylindrical shape, Comprising: It is a housing | casing which can distribute | circulate a cooling water through the inside. As for the 1st pipe | tube 311, the inside and the exterior are connecting by 1st refrigerant | coolant discharge part 312a-d, 1st refrigerant | coolant introduction parts 316a-b, and 1st relief part 317a-b. A hollow cylindrical second tube 313a and a second tube 313b are fitted inside the first tube 311 so as to be movable in the rotational direction around the major axis.

  The first refrigerant discharge portions 312a to 312d are rectangular communication holes, and the long axis of the first tube 311 extends from the end of the first tube 311 on the side where the actuator 315 is not disposed toward the actuator 315 side. The first refrigerant discharge parts 312a, 312b, 312d, and 312c are arranged in this order at different positions in the direction. In this case, 1st refrigerant | coolant discharge part 312a-d can change arbitrarily arrangement | positioning to the 1st pipe | tube 311 according to the layout of a to-be-cooled site | part. In addition, the first refrigerant discharge units 312a to 312d are not limited to a rectangular shape, and any shape can be adopted according to the required cooling performance of the system.

  The first refrigerant introduction part 316a and the first relief part 317a are arranged at a position in the major axis direction of the first pipe 311 in which a connection part between the second pipe 313a and the second pipe 313b is arranged. The first flow path 21a is connected to the first refrigerant introduction part 316a and the first relief part 317a, and the cooling water flows through the first flow path 21a regardless of the rotational phase around the major axis of the second pipe 313. The refrigerant is introduced into the first pipe 311 from the one refrigerant introduction part 316a and flows from the first relief part 317a to the first flow path 21a.

  The first refrigerant introduction part 316b is a position in the major axis direction of the first pipe 311 in which the second pipe 313a is arranged, and is arranged closer to the actuator 315 than the first refrigerant discharge part 312a. Regardless of the rotational phase around the major axis of the second pipe 313a, cooling water flows from the first refrigerant introduction section 316b to the inside of the second pipe 313a in the second pipe 313a that overlaps the first refrigerant introduction section 316b. A second refrigerant introduction portion 318a that can be circulated is provided. The first relief part 317b is a position in the major axis direction of the first pipe 311 on the end side (the side where the actuator 315 of the first pipe 311 is not disposed) from the first refrigerant discharge part 312a. It arrange | positions in the position which does not overlap with the 2nd pipe | tube 313a. A first flow path 21b is connected to the first refrigerant introduction part 316b and the first relief part 317b, and the cooling water passes through the first flow path 21b regardless of the rotational phase around the major axis of the second pipe 313a. The refrigerant is introduced into the first pipe 311 and the second pipe 313a from the first refrigerant introduction part 316b and flows from the first relief part 317b to the first flow path 21b.

  Inside the first pipe 311, a second pipe 313 a and a second pipe 313 b are arranged with the second pipe 313 b facing the actuator 315. The second pipe 313a and the second pipe 313b have a hollow cylindrical shape through which cooling water can flow, and are fitted inside the first pipe 311 so as to be movable in the rotational direction around the major axis.

The second pipe 313a is closed at the end on the second pipe 313b side, and cooling water cannot flow between the second pipe 313a and the second pipe 313b. Further, the second pipe 313 a has a second relief part 319 on the other end side, and cooling water can flow between the second pipe 313 a and the first pipe 311.
The second pipe 313b has a second refrigerant introduction part 318b at the end on the second pipe 313a side (that is, the first refrigerant introduction part 316a side), and is thereby introduced from the first refrigerant introduction part 316a. The cooling water can be circulated inside the second pipe 313b. The other end of the second tube 313b is connected to the actuator 315, and the driving force of the actuator 315 is transmitted to move the inside of the first tube 311 in the rotational direction around the major axis.

  The second tube 313a and the second tube 313b are connected by a connecting portion 313c, and the driving force of the actuator 315 is transmitted from the second tube 313b to the second tube 313a through the connecting portion 313c. Thereby, the 2nd pipe | tube 313a and the 2nd pipe | tube 313b move the inside of the 1st pipe | tube 311 to the rotation direction around a long axis with the same rotational phase.

The second pipe 313a and the second pipe 313b (second pipe 313) are communicated between the inside and the outside by the second refrigerant discharge portions 314a to 314d.
The second refrigerant discharge portions 314a to 314d are arranged in such a manner that the positions in the major axis direction of the respective discharge portions correspond to the positions in the major axis direction of the first refrigerant discharge portions 312a to 312d arranged in the first pipe 311. ing. Further, the second refrigerant discharge portions 314a to 314d have different arrangement positions in the rotation direction around the major axis of the respective discharge portions, and opening distances in the rotation direction around the major axis, respectively. Depending on the rotation phase around the major axis of the second pipe 313, the first refrigerant discharge parts 312a to 312d corresponding to each other are communicated.

  FIG. 4 shows an example of communication control between the first refrigerant discharge unit 312 and the second refrigerant discharge unit 314 based on the rotational phase around the major axis of the second pipe 313. The second refrigerant discharge part 314a communicates with the first refrigerant discharge part 312a and supplies cooling water when the rotational phase around the major axis of the second pipe 313 inside the first pipe 311 is between (1). Arranged to allow distribution. Therefore, when the rotation phase around the major axis of the second pipe 313 is within (1) inside the first pipe 311, the cooling water is supplied through the second flow path 22 connected to the first refrigerant discharge part 312 a. The circulation controller 31 circulates through the sub radiator 27 and the first flow path 21b.

Similarly, the second refrigerant discharge portions 314b, 314c, and 314d have rotational phases around the major axis of the second pipe 313 inside the first pipe 311 between (2), (3), and (4), respectively. In this case, the cooling water is arranged to communicate with the first refrigerant discharge portions 312b, 312c, and 312d, respectively. Therefore, when the rotation phase around the major axis of the second pipe 313 inside the first pipe 311 is between (2), (3), and (4), the third flow path 23 and the fourth flow path, respectively. 24, the cooling water circulates through the fifth flow path 25.
Thus, by controlling the rotational phase around the major axis of the second pipe 313 inside the first pipe 311, the arbitrary first refrigerant discharge part 312 and the second refrigerant discharge part 314 are communicated with each other. It is possible to execute control to circulate cooling water to the part to be cooled.

  The second refrigerant discharge portions 314a to 314d have a water droplet shape that is symmetrical with respect to the short axis of the second tube 313. Thus, the rotation phase of the second pipe 313 can be controlled to widen the area of the communication portion when the first refrigerant discharge portions 312a-d and the second refrigerant discharge portions 314a-d are communicated. The adjustment range of the flow rate of the circulating cooling water can be widened. In this case, the second refrigerant discharge portions 314a to 314d are not limited to the water droplet shape, and can adopt any shape (rectangular shape, elliptical shape, etc.) according to the required cooling performance of the system.

The actuator 315 is an electric motor that rotates the second pipe 313 inside the first pipe 311 by a predetermined amount around the major axis in accordance with a command from the ECU 10. The actuator 315 includes a potentiometer (position sensor) (not shown), detects the phase in the rotational direction around the major axis of the second pipe 313 inside the first pipe 311, and transmits the detection result to the ECU 10. The ECU 10 recognizes the phase in the rotational direction of the second pipe 313 from the detection result of the position sensor, and instructs the actuator 315 to rotationally drive the second pipe 313 to the target rotational phase around the major axis of the second pipe 313. To do. In this case, the actuator 315 is not limited to an electric motor, and any configuration that can rotate the second pipe 313 around the major axis can be employed. The position sensor is not limited to a potentiometer, and any position sensor capable of detecting the rotational phase around the major axis of the second tube 313 inside the first tube 311 can be applied.
The actuator 315 is an example of the configuration of the driving means of the present invention.

  Water temperature sensors 41 and 42 for measuring the temperature of the cooling water are provided in the vicinity of the water jacket of the cylinder head 101 and the first refrigerant introduction part 316a and the first relief part 317a of the refrigerant flow control device 31 ( (See FIG. 2). The water temperature sensors 41 and 42 detect the cooling water temperature inside the water jacket and inside the refrigerant flow control device 31, and transmit the detection result to the ECU 10. In this case, the water temperature sensors 41 and 42 are not limited to the above positions, and can be provided at any position where the temperature of the cooling water circulating inside the engine 100 and the refrigerant flow control device 31 can be detected.

Returning to FIG. 1, the ECU 10 includes a central processing unit (CPU) that performs arithmetic processing, a read only memory (ROM) that stores programs, a random access memory (RAM) that stores data, and a non-volatile RAM (NVRAM). ).
ECU10 performs circulation control of the cooling water of vehicle cooling system 1 based on detection results, such as water temperature sensors 41 and 42 and a potentiometer. In this case, the ECU 10 can also serve as an engine ECU that integrally controls the operation of the engine 100 such as the operation of the throttle valve, the operation of the injector, and the ignition timing of the spark plug.

  FIG. 5 shows an example of control executed by the ECU 10. The control of the ECU 10 starts when the ignition switch is turned on and the engine 100 is started. ECU 10 determines that early warm-up of engine 100 is necessary when the coolant temperature detected by water temperature sensors 41 and 42 is lower than a predetermined first temperature. Then, the ECU 10 instructs the actuator 315 to adjust the rotational phase around the major axis of the second pipe 313 inside the first pipe 311 to a position where the first refrigerant discharge units 312a to 312d are closed. By executing this control, when the engine 100 is cold (warming up), the circulation of the cooling water inside the water jacket of the cylinder head 101 and the cylinder block 102 is temporarily stopped, and the engine 100 is warmed up. Can be improved. Here, as the predetermined first temperature for determining whether or not early warm-up is necessary, an arbitrary cooling water temperature at which the engine 100 can be determined to be cold is applied, and for example, 60 to 80 [° C.]. Can be set.

  When the detection result of the water temperature sensor 42 is equal to or higher than a predetermined first temperature (for example, 60 ° C.), the ECU 10 sets the rotational phase around the major axis of the second pipe 313 inside the first pipe 311 to the first refrigerant discharge unit 312a. The actuator 315 is commanded to adjust to a position where the second refrigerant discharge portion 314a communicates (that is, the position (1)). Thus, the cooling water circulates from the refrigerant flow control device 31 to the sub-radiator 27 and the first flow path 21b through the second flow path 22 connected to the first refrigerant discharge part 312a, and the cooling that circulates through the first flow path 21a. A part of the water is cooled by the sub-radiator 27. Therefore, the cooling water circulating through the first flow path 21a is adjusted to a cooling water temperature that can sufficiently cool the EGR cooler 104 and the inverter 202.

  In this case, the ECU 10 compares the fuel efficiency effect by the mass EGR control with the cooling loss reduction effect by the high water temperature in accordance with the operating state of the engine 100, and selects and preferentially controls the larger portion for the fuel efficiency improvement. (See FIG. 6). In this case, it is desirable that a comparison map between the fuel efficiency effect by the large-volume EGR control and the cooling loss reduction effect by the high water temperature is obtained in advance by a bench test or the like and recorded in the ROM of the ECU 10.

  Returning to FIG. 5, when the detection result of the water temperature sensor 41 becomes equal to or higher than a predetermined second temperature (for example, 70 ° C.), the ECU 10 changes the rotation phase around the major axis of the second pipe 313 inside the first pipe 311 to the first. The actuator 315 is commanded to adjust to a position where the refrigerant discharge section 312b and the second refrigerant discharge section 314b communicate with each other (that is, the position (2)). Accordingly, in order to circulate cooling water to the cylinder head 101, the oil cooler 105, and the refrigerant flow control device 31 through the third flow path 23 connected to the first refrigerant discharge portion 312b, the cylinder head 101 and the oil cooler 105 are appropriately connected. Can be cooled to any temperature.

  ECU 10 determines that warm-up of engine 100 has been completed when the detection result of at least one of water temperature sensors 41 and 42 is equal to or higher than a predetermined third temperature (for example, 80 ° C.). Then, the ECU 10 determines the rotational phase around the major axis of the second pipe 313 inside the first pipe 311 at a position where the first refrigerant discharge section 312c and the second refrigerant discharge section 314c communicate with each other (that is, position (3)). The actuator 315 is commanded to adjust to Accordingly, the cooling water is circulated to the cylinder block 102 and the refrigerant flow control device 31 through the fourth flow path 24 connected to the first refrigerant discharge portion 312c, so that the cylinder block 102 can be cooled to an appropriate temperature. .

  When the detection result of at least one of the water temperature sensors 41 and 42 becomes equal to or higher than a predetermined fourth temperature (for example, 90 ° C.), the ECU 10 determines that it is necessary to further improve the cooling efficiency of the portion to be cooled. Then, the ECU 10 determines the rotational phase around the major axis of the second pipe 313 inside the first pipe 311 at the position where the first refrigerant discharge portion 312d and the second refrigerant discharge portion 314d communicate with each other (that is, the position (4)). The actuator 315 is commanded to adjust to As a result, cooling water circulates from the refrigerant flow control device 31 to the main radiator 26 and the first flow path 21 through the fifth flow path 25 connected to the first refrigerant discharge portion 312d, and circulates in the vehicle cooling system 1. Is cooled by the main radiator 26 and the sub radiator 27. Therefore, the cooling water circulating through the vehicle cooling system 1 is adjusted to a cooling water temperature that can sufficiently cool the portion to be cooled.

  Thus, by executing the cooling water circulation control by the refrigerant flow control device 31, it is possible to circulate the cooling water at an appropriate temperature according to the driving situation to the cooled part of the vehicle, so that the fuel efficiency of the vehicle Can be greatly improved.

  As described above, the vehicle cooling system of this embodiment includes the first pipe provided with the first refrigerant discharge part, the second pipe provided with the second refrigerant discharge part, the actuator, and the first refrigerant introduction part. And a second refrigerant introduction part, and an arbitrary first refrigerant discharge part and second refrigerant by controlling the rotation phase around the major axis of the second pipe inside the first pipe. By communicating with the discharge part, the cooling water can be circulated to any part to be cooled. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration.

  Next, a second embodiment of the present invention will be described. The vehicle cooling system 2 of the present embodiment includes a refrigerant flow control device 32 in which the second pipe 323 is movably fitted in the long axis direction inside the first pipe 321 instead of the refrigerant flow control device 31. Thus, the vehicle cooling system 1 is different.

As in the first embodiment, the vehicle cooling system 2 according to the present embodiment includes the ECU 10, the first flow path 21, the second flow path 22, the third flow path 23, the fourth flow path 24, the fifth flow path 25, and the main radiator. 26, a sub radiator 27, a water pump 28, and water temperature sensors 41 and 42.
Further, the vehicle cooling system 2 includes a refrigerant flow control device 32 in which the second pipe 323 is fitted so as to be movable in the long axis direction inside the first pipe 321, and the second inside the first pipe 321. The structure which distribute | circulates cooling water to arbitrary to-be-cooled parts by controlling the position of the longitudinal direction of the pipe | tube 323, and making arbitrary 1st refrigerant | coolant discharge part 322a-d and 2nd refrigerant | coolant discharge part 324a-d communicate. It is.

FIG. 7 is a diagram illustrating a configuration example of the refrigerant flow control device 32 according to the embodiment. In addition, about the component similar to Example 1, the same reference number is attached | subjected in drawing and the detailed description is abbreviate | omitted.
The refrigerant flow control device 32 includes a first pipe 321, first refrigerant discharge parts 322 a to d, second pipes 323 a to b, second refrigerant discharge parts 324 a to d, an actuator 325, first refrigerant introduction parts 326 a to b, 1 relief part 327a-b, it has the composition provided with the 2nd refrigerant introduction part 328a-b, and the 2nd relief part 329, and it is the 1st channel 21-5th in each of the 1st refrigerant discharge part 322a-d. The path 25 is connected.

  The 1st pipe | tube 321 is a hollow cylindrical shape similarly to Example 1, Comprising: It is a housing | casing through which cooling water can distribute | circulate. As for the 1st pipe | tube 321, the inside and the exterior are connecting by 1st refrigerant | coolant discharge part 322a-d, 1st refrigerant | coolant introduction part 326a-b, and 1st relief part 327a-b. The first refrigerant discharge portions 322a to 322d are rectangular communication holes as in the first embodiment, and from the end portion side of the first pipe 321 where the actuator 325 is not disposed toward the actuator 325 side, The first refrigerant discharge parts 322a, 322b, 322d, and 322c are arranged in this order at different positions in the major axis direction of the first pipe 321. A hollow cylindrical second pipe 323a and a second pipe 323b are fitted inside the first pipe 321 so as to be movable in the major axis direction.

  The first refrigerant introduction part 326b is a position in the major axis direction of the first pipe 321 in which the second pipe 323a is arranged, and is arranged closer to the actuator 325 than the first refrigerant discharge part 322a. Regardless of the position of the second pipe 323a in the long axis direction, the coolant flows from the first refrigerant introduction part 326b to the inside of the second pipe 323a in the second pipe 323a that overlaps the first refrigerant introduction part 326b. A possible second refrigerant introduction portion 328a is provided. The first flow path 21b is connected to the first refrigerant introduction part 326b and the first relief part 327b, and the cooling water passes through the first flow path 21b regardless of the position of the second pipe 323a in the long axis direction. The refrigerant is introduced into the first pipe 321 and the second pipe 323a from the refrigerant introduction part 326b and flows from the first relief part 327b to the first flow path 21b.

  Inside the first pipe 321, a second pipe 323 a and a second pipe 323 b are arranged with the second pipe 323 b facing the actuator 325. The second pipe 323a and the second pipe 323b have a hollow cylindrical shape through which cooling water can flow, and are fitted inside the first pipe 321 so as to be movable in the long axis direction. The ends of the second tube 323a and the second tube 323b have the same configuration as the ends of the second tube 313a and the second tube 313b of the first embodiment, and are connected to each other by a connecting portion 323c.

  One end of the second tube 323b is connected to the actuator 325, and the driving force of the actuator 325 is transmitted from the second tube 323b to the second tube 323a through the connecting portion 323c. Thereby, the 2nd pipe | tube 323a and the 2nd pipe | tube 323b slide and move the inside of the 1st pipe | tube 321 to a major axis direction.

As for the 2nd pipe | tube 323a and the 2nd pipe | tube 323b (2nd pipe | tube 323), the inside and the exterior are connecting by 2nd refrigerant | coolant discharge part 324a-d.
The second refrigerant discharge parts 324a to 324d are arranged in the rotation direction around the major axis of the first refrigerant discharge parts 322a to 322d arranged in the first pipe 321, respectively. It is arranged corresponding to the arrangement position. Further, the second refrigerant discharge portions 324a to 324d have different positions in the major axis direction of the respective discharge portions and opening distances in the major axis direction, and the major axis of the second tube 323 inside the first tube 321 is different. The first refrigerant discharge parts 322a to 322d communicate with each corresponding to the position in the direction.

  FIG. 8 shows an example of communication control between the first refrigerant discharge part 322 and the second refrigerant discharge part 324 based on the movement position of the second pipe 323 in the long axis direction. The second refrigerant discharge part 324a communicates with the first refrigerant discharge part 322a to receive cooling water when the movement position in the long axis direction of the second pipe 323 inside the first pipe 321 is between (5). Arranged to allow distribution. Therefore, when the movement position of the second pipe 323 in the major axis direction in the first pipe 321 is between (5), the cooling water is supplied through the second flow path 22 connected to the first refrigerant discharge part 322a. The distribution controller 32 circulates through the sub radiator 27 and the first flow path 21b.

Similarly, in the second refrigerant discharge portions 324b, 324c, and 324d, the movement position in the major axis direction of the second pipe 323 inside the first pipe 321 is between (6), (7), and (8), respectively. In this case, the coolant is arranged to communicate with the first refrigerant discharge portions 322b, 322c, and 322d so that the cooling water can flow. Therefore, when the moving position of the second pipe 323 in the major axis direction in the first pipe 321 is between (6), (7), and (8), the third flow path 23 and the fourth flow path, respectively. 24, the cooling water circulates through the fifth flow path 25.
Thus, by controlling the movement position of the second pipe 323 in the major axis direction inside the first pipe 321, the arbitrary first refrigerant discharge part 322 and the second refrigerant discharge part 324 are communicated with each other. It is possible to execute control to circulate cooling water to the part to be cooled.

  The second refrigerant discharge portions 324a to 324d have a water droplet shape that is symmetrical with respect to the long axis of the second pipe 323. Accordingly, the width of the area of the communication portion when the first refrigerant discharge portions 322a to 322d and the second refrigerant discharge portions 324a to 324d communicate with each other is controlled by controlling the position of the second pipe 323 in the long axis direction. Therefore, the adjustment range of the flow rate of the circulating cooling water can be widened. In this case, the second refrigerant discharge portions 324a to 324d are not limited to the water droplet shape, and can adopt any shape (rectangular shape, elliptical shape, etc.) according to the required cooling performance of the system.

The actuator 325 is an electric motor that applies a driving force for sliding the second pipe 323 inside the first pipe 321 in the major axis direction by a predetermined amount in accordance with a command from the ECU 10. The actuator 325 detects the position of the second pipe 323 in the major axis direction inside the first pipe 321 with a potentiometer (not shown), and transmits the detection result to the ECU 10. The ECU 10 recognizes the position of the second pipe 323 in the long axis direction from the detection result of the position sensor, and instructs the actuator 325 to move the second pipe 323 to the target position of the second pipe 323 in the long axis direction. . In this case, the actuator 325 is not limited to an electric motor, and any configuration that provides a driving force that can slide the second pipe 323 in the long axis direction can be employed.
The actuator 325 is an example of the configuration of the driving means of the present invention.

  As described above, the vehicle cooling system of this embodiment includes the first pipe provided with the first refrigerant discharge part, the second pipe provided with the second refrigerant discharge part, the actuator, and the first refrigerant introduction part. And a second refrigerant introduction unit, and an arbitrary first refrigerant discharge unit and second refrigerant discharge by controlling the position of the second pipe in the major axis direction inside the first pipe. By communicating with the part, the cooling water can be circulated to any part to be cooled. Therefore, it is possible to circulate cooling water having an appropriate temperature to each part of the vehicle with a simple configuration.

  The above embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to these, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

1, 2 Vehicle cooling system 10 ECU
21 to 25 1st flow path to 5th flow path 26 Main radiator 27 Sub radiator 28 Water pump 31, 32 Refrigerant flow control device 41, 42 Water temperature sensor 100 Engine 101 Cylinder head 102 Cylinder block 200 Electric motor 311 321 312, 322 First refrigerant discharge part 313, 323 Second pipe 314, 324 Second refrigerant discharge part 315, 325 Actuator (drive means)
316, 326 First refrigerant introduction part 318, 328 Second refrigerant introduction part

Claims (5)

A first pipe having a first refrigerant introduction section that introduces a refrigerant into the interior, and a plurality of first refrigerant discharge sections that can discharge the refrigerant introduced from the first refrigerant introduction section to the outside;
A second refrigerant introduction part that is fitted inside the first pipe and introduces a refrigerant introduced from the first refrigerant introduction part, and a refrigerant introduced from the second refrigerant introduction part can be discharged to the outside. A second pipe having a plurality of second refrigerant discharge parts,
Drive means for driving the second pipe so that any second refrigerant discharge part moves to a position communicating with the corresponding first refrigerant discharge part ,
The second pipe is fitted inside the first pipe so as to be rotatable around a long axis by a driving force of the driving means,
The second refrigerant discharge part is disposed in the second pipe so as to be able to communicate with the corresponding first refrigerant discharge part according to a rotational phase around the major axis of the second pipe,
The second pipe is constituted by a first second pipe and a second second pipe connected to an end portion in a major axis direction of the first second pipe by a connecting portion,
The first second pipe and the second second pipe are configured such that refrigerants flowing through the inside cannot flow through each other,
The first second pipe and the second second pipe are provided with the second refrigerant introduction part and the second refrigerant discharge part, respectively, and the second refrigerant discharge part of the second second pipe Is plural,
The second refrigerant introduction portion of the second second pipe is provided at an end portion of the second second pipe facing the first second pipe, and a plurality of second second pipes are provided. The refrigerant flow control device, wherein the second refrigerant discharge portion is provided at a different position in the major axis direction on a side surface along the major axis direction of the second second pipe . The drive means controls the area of the communication portion when the arbitrary second refrigerant discharge portion communicates with the corresponding first refrigerant discharge portion, thereby discharging refrigerant discharged from the first refrigerant discharge portion. The refrigerant flow control device according to claim 1, wherein the amount is adjusted . A vehicle cooling device comprising the refrigerant flow control device according to claim 1 . 4. The vehicle cooling device according to claim 3 , wherein the cooling path of the oil cooler is provided downstream of the cooling path of the cylinder head . The vehicle cooling device according to claim 3 or 4 , wherein the refrigerant flow control device adjusts a discharge amount of the refrigerant in accordance with a load of the internal combustion engine .

Images