A heat dissipation system based on a heavy-duty vehicle hydro-mechanical transmission

Abstract

The present application relates to a kind of heavy vehicle hydro-mechanical transmission-based heat dissipation system, belong to heavy vehicle heat dissipation system technical field, solve the technical problem of low heat dissipation efficiency of heavy vehicle, its heat dissipation system includes whole vehicle radiator, torque converter radiator, electronic fan, water tank, water pump, thermostat, oil cooler, check valve, bypass valve, controller.Controller is used to control thermostat, bypass valve, electronic fan work.Electronic fan is installed on whole vehicle radiator, torque converter radiator, for the accelerated heat dissipation of whole vehicle radiator, torque converter radiator.Heat dissipation system working process includes waterway heat dissipation, torque converter oil circuit heat dissipation, rear-mounted retarder oil circuit heat dissipation.The heat dissipation system is used for the heat dissipation of heavy vehicle's hydro-mechanical transmission, engine, rear-mounted retarder.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heavy-duty vehicle heat dissipation system, and particularly relates to a heat dissipation system based on a heavy-duty vehicle hydro-mechanical transmission. BACKGROUND

[0002] The heavy-duty special vehicle, mine vehicle and other large-tonnage vehicles require a large starting torque when starting, and the torque provided by the engine is insufficient in most cases to start the vehicle in a short time, so a lock-up torque converter needs to be integrated on the vehicle to increase the starting torque of the vehicle. The torque converter of the vehicle only works when the vehicle starts and climbs, and the torque converter itself only needs to be cooled when working. However, most of the vehicle heat dissipation systems in China directly connect the heat dissipation of the torque converter with the heat dissipation of the whole vehicle, and the torque converter is cooled all the time as long as the vehicle heat dissipation system is working. This kind of heat dissipation system wastes the heat dissipation efficiency of the vehicle to some extent and increases the power loss.

[0003] The large-tonnage vehicle also needs to be equipped with a rear-mounted retarder for auxiliary braking to ensure the safety of vehicle driving. SUMMARY

[0004] In order to overcome the low heat dissipation efficiency of the heavy-duty vehicle, the application provides a heat dissipation system based on a heavy-duty vehicle hydro-mechanical transmission.

[0005] The application solves the technical problem by adopting the technical scheme of:

[0006] A heat dissipation system based on a heavy-duty vehicle hydro-mechanical transmission is used for heat dissipation of a hydro-mechanical transmission, an engine and a rear-mounted retarder of the heavy-duty vehicle, and includes a vehicle radiator, a torque converter radiator, an electronic fan, a water tank, a water pump, a thermostat, an oil cooler, a check valve, a bypass valve and a controller.

[0007] The hydro-mechanical transmission includes a torque converter and a mechanical transmission. The engine, the torque converter, the mechanical transmission and the rear-mounted retarder are sequentially connected.

[0008] The controller is used for controlling the operation of the electronic fan. The electronic fan is installed on the vehicle radiator and the torque converter radiator and is used for accelerating the heat dissipation of the vehicle radiator and the torque converter radiator.

[0009] The working process of the heat dissipation system includes water route heat dissipation, torque converter air cooling heat dissipation and rear-mounted retarder water cooling heat dissipation accelerated by the electronic fan.

[0010] The working process of the water route heat dissipation is:

[0011] The water pump works, and the coolant in the water tank flows through the water pump, the engine, the oil cooler, and then enters the thermostat in turn. The coolant flowing out of the thermostat is either cooled by the vehicle radiator and then returned to the water tank, or directly returned to the water tank.

[0012] The working process of the torque converter air cooling is as follows:

[0013] The oil flowing out of the torque converter is either cooled by the torque converter oil cooler (5) with an electronic fan and then flows back to the torque converter through a one-way valve, or directly flows back to the torque converter through a bypass valve.

[0014] The working process of the rear-mounted retarder oil circuit cooling is as follows:

[0015] The coolant flowing out of the rear-mounted retarder flows back to the rear-mounted retarder through the oil cooler.

[0016] The above cooling system controls the electronic fan installed on the vehicle radiator to work. When the retarder works, the coolant enters the vehicle radiator through the thermostat under the control of the controller, and the electronic fan installed on the vehicle radiator works to accelerate the heat dissipation of the vehicle radiator. When the retarder does not work, the electronic fan installed on the vehicle radiator does not work under the control of the controller.

[0017] The above cooling system controls the electronic fan installed on the torque converter radiator to work. When the oil temperature in the torque converter reaches or is higher than the set threshold, the electronic fan installed on the torque converter radiator works under the control of the controller to accelerate the heat dissipation of the torque converter radiator. When the oil temperature in the torque converter is lower than the set threshold, the electronic fan installed on the torque converter radiator does not work under the control of the controller.

[0018] The above cooling system, the water circuit cooling working process further comprises:

[0019] When the coolant temperature in the water circuit cooling reaches or is higher than the temperature threshold of the thermostat, the coolant flowing out of the thermostat flows through the vehicle radiator for heat dissipation and then returns to the water tank. When the coolant temperature is lower than the temperature threshold of the thermostat, the coolant flowing out of the thermostat directly returns to the water tank.

[0020] The above cooling system, the water circuit cooling is a combination of coolant cooling and electronic fan cooling. When the coolant flowing out of the thermostat flows through the vehicle radiator for heat dissipation, the electronic fan installed on the vehicle radiator works under the control of the controller to accelerate the heat dissipation of the vehicle radiator.

[0021] The above cooling system, the working process of the torque converter oil circuit cooling further comprises:

[0022] When the pressure in the torque converter radiator is lower than the threshold, the bypass valve is closed, the coolant flowing out of the torque converter is radiated through the torque converter radiator, and then flows back to the torque converter through the one-way valve. When the pressure in the torque converter radiator reaches or is higher than the threshold, the bypass valve is opened, and the coolant flowing out of the torque converter directly flows back to the torque converter.

[0023] In the heat dissipation system, the torque converter oil passage heat dissipation is an electronic fan cooling mode. When the temperature of the coolant in the torque converter reaches or is higher than the temperature threshold of the bypass valve, the electronic fan installed on the torque converter radiator starts to work under the control of the controller, and the working speed of the electronic fan is adjusted according to the oil temperature in the torque converter. When the oil temperature in the torque converter is lower than the temperature threshold of the bypass valve, the electronic fan installed on the torque converter radiator does not work under the control of the controller.

[0024] In the heat dissipation system, the water passage heat dissipation, the coolant flowing through the engine is water. The torque converter oil passage heat dissipation, that is, the so-called air cooling, exchanges heat with the oil, and the retarder exchanges heat with the cooling water. The electronic fan accelerates the cooling of the cooling water.

[0025] In the heat dissipation system, the oil cooler is used for heat dissipation of the rear-mounted retarder, and the oil passage and the water passage are not communicated. The coolant of the oil cooler oil passage is oil, the oil flows into the oil cooler from the rear-mounted retarder, and flows back to the rear-mounted retarder. The coolant of the oil cooler water passage is water, the water flows into the oil cooler from the engine, and flows out to the thermostat.

[0026] The heat dissipation system based on the heavy-load vehicle hydraulic mechanical transmission has the following beneficial effects:

[0027] The heat dissipation system based on the heavy-load vehicle hydraulic mechanical transmission has the following beneficial effects:

[0028] The heat dissipation system based on the heavy-load vehicle hydraulic mechanical transmission has the following beneficial effects:

[0029] The heat dissipation system based on the heavy-load vehicle hydraulic mechanical transmission has the following beneficial effects:

[0030] When the rear-mounted retarder works, the electronic fan accelerates the cooling, the heat dissipation reliability is high, and the cooling effect is obvious. The safety of the vehicle is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 FIG. 1 is a heat dissipation system structure schematic diagram of an embodiment of the heat dissipation system based on the heavy-load vehicle hydraulic mechanical transmission according to the present application.

[0032] Reference signs: 1. Hydro-mechanical transmission, 2. Engine, 3. Rear-mounted retarder, 4. Vehicle radiator, 5. Torque converter radiator, 6. Electronic fan, 7. Water tank, 8. Water pump, 9. Thermostat, 10. Oil cooler, 11. Torque converter, 12. Mechanical transmission, 13. Check valve, 14. Bypass valve. DETAILED DESCRIPTION

[0033] The application will be further described in detail below in combination with the drawings and specific examples.

[0034] Example 1

[0035] The function of the heat dissipation circulation system is mainly achieved by the combination of cooling water (liquid) and electronic fan cooling.

[0036] When the engine of the vehicle is started to drive the water pump to work, the cooling water (liquid) is pumped from the water tank into the engine to directly cool the engine; then the cooling water (liquid) reaches the oil cooler under the pressure of the water pump, and the retarder oil is cooled in the oil cooler; the cooling water (liquid) reaches the thermostat after passing through the oil cooler, and the thermostat selects to open different pipelines according to the temperature of the cooling water (liquid) at this time: if the cooling water (liquid) does not reach the set temperature at this time, the thermostat will open the vehicle radiator bypass pipeline, and the cooling water (liquid) will not pass through the vehicle radiator to directly enter the next cycle, which is also called small cycle; if the retarder works at this time, the temperature of the cooling water (liquid) has reached the set value, and the thermostat will open the vehicle radiator pipeline, and the controller will control the opening of the electronic fan according to the working of the retarder. The cooling water (liquid) is cooled by the vehicle radiator and then circulated, which is also called large cycle.

[0037] When the vehicle starts or climbs, the torque converter starts to work, and the temperature sensor on the torque converter can monitor the temperature rise of the torque converter in real time. When the temperature reaches the set temperature, the electronic fan starts to work through the controller (TCU) and adjusts the cooling power. The torque converter is connected to the radiator through the torque converter oil outlet pipeline, and the radiator is connected to the oil sump through the torque converter oil return pipeline. The bypass valve is connected between the torque converter oil outlet pipeline and the torque converter oil return pipeline, and the check valve is connected to the torque converter oil return pipeline. The oil in the torque converter enters the radiator through the torque converter oil outlet pipeline, and the radiator cools the oil and returns it to the oil sump through the torque converter oil return pipeline. When the oil pressure in the radiator abnormally increases, the bypass valve opens, and the oil directly returns to the oil sump through the torque converter oil return pipeline.

[0038] Example 2

[0039] The heat dissipation circulation system is composed of an engine, a torque converter, a mechanical transmission, a rear-mounted retarder, a vehicle radiator, a torque converter radiator, an electronic fan, a water tank, a water pump, a thermostat, an oil cooler, water pipes, oil pipes and the like.Figure 1 As shown.

[0040] Wherein the water cycle: the engine after starting, the water pump work, the water pump will be cooled water (liquid) in the tank out. Water pump cooling water (liquid) from the outlet into the engine cooling, water pipes in series to the oil cooler, water (liquid) from the oil cooler according to the cooling water (liquid) temperature, through the thermostat into different pipeline. When the temperature is not high, directly through the vehicle radiator bypass pipeline continues to circulate (this cycle is also called small cycle). If the temperature is too high, the thermostat opens, the controller will be according to the retarder work control electronic fan start. After the thermostat water (liquid) road through the vehicle radiator cooling and then in turn (this cycle is also called large cycle).

[0041] Torque converter oil and cooling: the oil pipe one end and the torque converter, the other end and the torque converter radiator connection. Oil pipe in the middle of a bypass valve, when the radiator pressure increases, or torque converter oil pipe, oil return pipe and radiator circuit caused by unpredictable blockage of the pressure surge situation, bypass valve opens, the torque converter oil directly connected to the torque converter oil return oil return, so that the oil directly back to the oil pan; the oil return pipe is connected to the radiator, the other end of the torque converter assembly, the oil return pipe connected one-way valve, adjust the pressure and flow into the radiator, so that the oil and radiator (electronic fan cooling) fully heat exchange, so as to cool; the pressure of the one-way valve is much less than the bypass valve opening pressure, will not cause the bypass valve misopening; the torque converter oil outlet is connected with temperature sensor and controller (TCU), can real-time monitoring of the torque converter oil temperature, if the temperature exceeds the set temperature, the controller (TCU) according to the temperature range adjustment electronic fan operating speed and cooling power. Can accurately adjust the torque converter radiator heat dissipation power.

[0042] When the torque converter does not work, that is, when the lock, the required heat dissipation is small, the temperature is not high, the electronic fan stops working.

Claims

1. A heat dissipation system based on a heavy duty vehicle hydro-mechanical transmission, characterized in that, The application discloses a heat dissipation system for a heavy load vehicle, which comprises a mechanical transmission (1), an engine (2), a rear-mounted retarder (3), a vehicle radiator (4), a torque converter radiator (5), an electronic fan (6), a water tank (7), a water pump (8), a thermostat (9), an oil cooler (10), a check valve (13) and a bypass valve (14). The mechanical transmission (1) comprises a torque converter (11) and a mechanical transmission (12); the engine (2), the torque converter (11) and the mechanical transmission (12) are sequentially connected with the rear-mounted retarder (3). The controller is used for controlling the electronic fan (6) to work; the electronic fan (6) is installed on the vehicle radiator (4) and the torque converter radiator (5) and is used for accelerating the heat dissipation of the vehicle radiator (4) and the torque converter radiator (5). The working process of the heat dissipation system comprises water route heat dissipation, torque converter (11) air cooling heat dissipation and rear-mounted retarder (3) accelerated heat dissipation. The working process of the water route heat dissipation is as follows: the water pump (8) works, the cooling liquid in the water tank (7) sequentially flows through the water pump (8), the engine (2), the oil cooler (10) and enters the thermostat (9); the cooling liquid flowing out of the thermostat (9) is either heat-dissipated through the vehicle radiator (4) and then returned to the water tank (7) or directly returned to the water tank (7). The working process of the torque converter (11) heat dissipation is as follows: the oil flowing out of the torque converter (11) is either heat-dissipated through the torque converter radiator (5) by the electronic fan (6) and then returned to the torque converter (11) through the check valve or directly returned to the torque converter (11) through the bypass valve (14). The working process of the rear-mounted retarder (3) heat dissipation is as follows: the oil flowing out of the rear-mounted retarder (3) is returned to the rear-mounted retarder (3) through the oil cooler (10); at this time, the electronic fan (6) on the vehicle radiator (4) works to accelerate the cooling of the oil. The controller controls the electronic fan (6) installed on the vehicle radiator (4) to work; when the rear-mounted retarder (3) works, the cooling liquid flows through the vehicle radiator (4) and, under the control of the controller, the electronic fan (6) installed on the vehicle radiator (4) works to accelerate the heat dissipation of the vehicle radiator (4); when the rear-mounted retarder (3) does not work, the electronic fan (6) installed on the vehicle radiator (4) does not work under the control of the controller. The controller controls the electronic fan (6) installed on the torque converter radiator (5) to work; when the oil temperature in the torque converter (11) reaches or is higher than a set threshold value, the electronic fan (6) installed on the torque converter radiator (5) works under the control of the controller to accelerate the heat dissipation of the torque converter radiator (5); when the oil temperature in the torque converter (11) is lower than the set threshold value, the electronic fan (6) installed on the torque converter radiator (5) does not work under the control of the controller. The working process of the water route heat dissipation further comprises:

2. The heat dissipation system of claim 1, wherein, ​ 3. The heat dissipation system of claim 1, wherein, ​ 4. The heat dissipation system of claim 1, wherein, ​ When the temperature of the cooling liquid in the water cooling reaches or is higher than the set temperature of the thermostat (9), the cooling liquid flowing out of the thermostat (9) flows through the vehicle radiator (4) to be cooled and returns to the water tank (7); when the temperature of the cooling liquid is lower than the set temperature of the thermostat (9), the cooling liquid flowing out of the thermostat (9) directly returns to the water tank (7).

5. The heat dissipation system of claim 4, wherein, The water cooling is a combination of cooling liquid cooling and electronic fan accelerated cooling, when the rear-mounted retarder (3) is working, the cooling liquid flowing out of the thermostat (9) flows through the vehicle radiator (4) to be cooled, under the control of the controller, the electronic fan (6) installed on the vehicle radiator (4) works to accelerate the cooling of the vehicle radiator (4).

6. The heat dissipation system of claim 1, wherein, The torque converter (11) oil cooling working process further comprises: When the pressure in the torque converter radiator (5) is lower than the set pressure, the bypass valve (14) is closed, the oil flowing out of the torque converter (11) flows through the torque converter radiator (5) to be cooled, and then flows back to the torque converter (11) through the one-way valve (13); when the pressure in the torque converter radiator (5) reaches or is higher than the set pressure, under the control of the controller, the bypass valve (14) is opened, and the cooling liquid flowing out of the torque converter (11) directly flows back to the torque converter (11).

7. The heat dissipation system of claim 6, wherein, The torque converter (11) oil cooling is a combination of oil cooling and electronic fan cooling, when the temperature of the cooling liquid in the torque converter (11) reaches or is higher than the set temperature of the bypass valve (14), under the control of the controller, the electronic fan (6) installed on the torque converter radiator (5) starts to work, and the working speed of the electronic fan (6) is adjusted according to the temperature of the cooling liquid in the torque converter (11); when the temperature of the cooling liquid in the torque converter (11) is lower than the set temperature of the bypass valve (14), under the control of the controller, the electronic fan (6) installed on the torque converter radiator (5) does not work.

8. The heat dissipation system of claim 1, wherein, The water cooling, the cooling liquid flowing through the engine (2) is water; the torque converter (11) is air-cooled; the rear-mounted retarder (3) is also water-cooled, and the cooling liquid flowing through the rear-mounted retarder (3) is oil.

9. The heat dissipation system of claim 1, wherein, The oil cooler (10) is used for the cooling of the rear-mounted retarder (3), and an oil circuit and a water circuit that are not communicated are arranged; the cooling liquid in the oil circuit of the oil cooler (10) is oil, which flows from the rear-mounted retarder (3) to the rear-mounted retarder (3); the cooling liquid in the water circuit of the oil cooler (10) is water, which flows from the engine (2) to the thermostat (9). The water cooling is a combination of cooling liquid cooling and electronic fan accelerated cooling, when the rear-mounted retarder (3) is working, the cooling liquid flowing out of the thermostat (9) flows through the vehicle radiator (4) to be cooled, under the control of the controller, the electronic fan (6) installed on the vehicle radiator (4) works to accelerate the cooling of the vehicle radiator (4).

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