JPH0632149U - Heat exchanger for automobile - Google Patents

Abstract

(57) [Summary] [Purpose] An engine cooling water cooling heat exchanger having a bypass circulation path arranged in parallel with the core, configured to cool the torque converter oil even during bypass. [Structure] An oil cooler is arranged in an overlapping path of a main circulation path flowing through a core and a bypass circulation path flowing through a bypass path.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil cooler of a torque converter arranged in a circulation path of a heat exchanger for cooling engine cooling water.

[0002]

[Prior art]

 Conventionally, a heat exchange device for cooling water of an automobile engine has been constructed as shown in FIG. That is, a pair of outlet tanks 2 and inlet tanks 3 are arranged at both ends of the core 1, and the inlet / outlet tanks 2 and 3 and the water jacket of the engine 4 are connected by inlet / outlet pipes 5 and 6, and circulate in the outlet pipes 5. A pump 10 is installed to form the main circulation path 7. At the same time, the bypass pipe 12 is provided in the inlet pipe 6 in parallel with the core 1 via the switching valve 8. The switching valve 8 is a thermostat type that switches depending on the temperature of the cooling water.

Further, an oil cooler 11 is installed inside the outlet tank 2, and the oil cooler 11 and the torque converter 13 are connected by an oil pipe. When the temperature of the engine cooling water flowing out from the engine 4 is high, the cooling water flows down from the inlet tank 3 into a large number of tubes (not shown) of the core 1, and the cooling water flows back from the outlet tank 2 to the engine 4. Then, the cooling water is cooled by the cooling air while flowing in the tube of the core 1. Further, this cooling water cools the oil cooler 11 in the outlet tank 2 and prevents the oil temperature of the torque converter 13 from exceeding a certain temperature. Next, when the temperature of the cooling water flowing out from the engine 4 is below a certain level, the switching valve 8 is switched to the bypass pipe 12 side, and the engine cooling water does not flow in the core 1.

[0004]

[Problems to be solved by the device]

 In the conventional oil cooler 11, when the switching valve 8 is switched to the bypass pipe 12 side, the circulation of the cooling water around the oil cooler 11 is stopped, the oil temperature of the torque converter rises, and the viscosity of the oil increases. And the life of the torque converter 13 may be affected.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention adopts the following configuration in order to solve the above problems. In the vehicle heat exchange device of the present invention, the pair of inlet / outlet tanks 2 and 3 arranged via the heat exchanger core 1 and the water jacket of the engine 4 are connected by the pair of inlet / outlet pipes 5 and 6. A main circulation path 7 for circulating the cooling water is formed in the core 1. Further, in parallel with the core 1, at least one end is formed with a bypass circulation passage 9 which does not allow cooling water to flow through the inlet pipe 6 through the switching valve 8 to the core 1. Further, a circulation pump 10 is installed in the outlet pipe 5. An oil cooler 11 for cooling the torque converter oil is arranged in an overlapping path between the main circulation path 7 and the bypass circulation path 9.

[0006]

[Action]

 According to the heat exchange device for an automobile of the present invention, the oil cooler 11 is arranged in the overlapping flow passage of the main circulation passage 7 and the bypass circulation passage 9, so that the cooling water flows into the main circulation passage 7. At all times, the oil cooler 11 is always cooled when it flows through the bypass circuit 9. As a result, it is possible to provide the torque converter 13 having a long life by keeping the oil temperature and viscosity constant.

[0007]

【Example】

 FIG. 1 shows a heat exchange device according to a first embodiment of the present invention. In this embodiment, a pair of upper and lower tanks 3 and 4 and a water jacket of an engine 4 are connected by a pair of inlet and outlet pipes 5 and 6. At the same time, a switching valve 8 is interposed in the inlet pipe 6, and one end of the bypass pipe 12 is connected to one opening of the switching valve 8. Further, the other end is connected to the outlet tank 2. A circulation pump 10 is arranged in the outlet pipe 5 that connects the outlet tank 2 and the engine 4. An oil cooler 11 is installed in the outlet tank 2, and the torque converter 13 and the oil cooler 11 are connected by an oil pipe. Then, when the temperature of the engine cooling water flowing out from the engine 4 is equal to or higher than a certain temperature, the cooling water flows through the main circulation path 7. That is, it flows down from the inlet pipe 6 through the inlet tank 3 into the tube (not shown) of the core 1, flows into the outlet tank 2, and returns from the outlet pipe 5 to the engine 4. Then, the cooling air flows to the fins (not shown) of the core 1 and the outer surface of the tube. The cooling water is cooled while flowing in a tube (not shown) of the core 1, reaches the outlet tank 2, and cools the outer circumference of the oil cooler 11. As a result, the oil flowing inside the oil cooler 11 is cooled, and the oil temperature of the torque converter 13 is maintained below a certain level.

Next, when the temperature of the engine cooling water flowing out from the engine 4 is below a certain level, the switching valve 8 is switched, and the engine cooling water flows through the bypass pipe 12 and returns to the engine 4. That is, the engine cooling water flows through the bypass circulation path 9 and does not flow through the core 1. However, the engine cooling water flows from the bypass pipe 12 through the outlet tank 2 and from the outlet pipe 5 to the engine 4, thus cooling the oil cooler 11. This allows the oil in the torque converter 13 to be cooled. Next, FIG. 2 shows a second embodiment of the present invention. In this embodiment, one end of the cooling water branch pipe is connected between the cooling water outlet side of the engine 4 and the switching valve 8 and the other end circulates. It is connected to the inlet side of the pump 10. Then, this branch pipe passes through the inside of the torque converter 13, and the oil cooler 11 is arranged inside thereof. The engine cooling water passes through the oil cooler 11 and cools the oil of the torque converter 13. In this embodiment as well, when the switching valve 8 is switched to the main circulation path 7 side as well as when the switching valve 8 is switched to the bypass circulation path 9 side as described above, the engine cooling water flows through the oil cooler 11, so that the torque is reduced. The rise in the oil temperature of converter 13 can be suppressed below a certain level.

[0009]

[Effect of device]

 Since the heat exchanger for a vehicle of the present invention has the oil cooler 11 provided in the overlapping path of the main circulation path 7 and the bypass circulation path 9, the oil cooler 11 is always cooled regardless of which switching valve 8 is switched. This makes it possible to prevent the torque converter oil from rising above a certain level, maintain the oil viscosity at a certain level, and extend the life of the torque converter.

[Brief description of drawings]

FIG. 1 is a heat exchange device according to a first embodiment of the present invention.

FIG. 2 is a heat exchange device according to a second embodiment of the present invention.

FIG. 3 is a conventional heat exchange device.

[Explanation of symbols]

 1 core 2 outlet tank 3 inlet tank 4 engine 5 outlet pipe 6 inlet pipe 7 main circuit 8 switching valve 9 bypass circuit 10 circulation pump 11 oil cooler 12 bypass pipe 13 torque converter

Claims (1)

[Scope of utility model registration request] 1. A pair of inlet / outlet tanks 2 and 3 arranged via a heat exchanger core 1 and a water jacket of an engine 4 are connected by a pair of inlet / outlet pipes 5 and 6, and inside the core 1. Main circulation path 7 for circulating cooling water to
And at least one end is connected to the inlet pipe 6 via the switching valve 8 in parallel with the heat exchanger core 1.
Bypass circulation path 9 for preventing cooling water from flowing through the core 1
And a circulation pump 10 interposed in the outlet pipe 5, and an oil cooler 11 arranged in an overlapping path of the main circulation path 7 and the bypass circulation path 9 for cooling the torque converter oil. A heat exchange device for automobiles.