An amt clutch thermal management system and method of controlling the same

Abstract

The present application relates to a kind of thermal management system and its control method, specifically, a kind of AMT clutch thermal management system and the control method of the thermal management system.The system includes temperature sensor, signal interface, gearbox controller, heat exchange module, electric water pump and engine cooling system;Temperature sensor is installed on clutch pressure disc, and the output end of temperature sensor is electrically connected with the input end of gearbox controller by signal interface installed on clutch actuator;Heat exchange module is installed on the inner side wall of clutch shell, and the output end of engine cooling system is communicated with the input end of heat exchange module, and the input end is communicated with the output end of heat exchange module;Electric water pump is installed on the output end of engine cooling system, and its control end is electrically connected with the control end of gearbox controller.The present application can quickly heat or cool clutch pressure disc, keep clutch transmission torque characteristic at a stable value, and ensure the running state of vehicle.

Description

Technical Field

[0001] This invention relates to a thermal management system and its control method, specifically to an AMT clutch thermal management system and its control method. Background Technology

[0002] Currently, commercial vehicle AMTs are all equipped with automatic clutch control devices to control the push clutch for powertrain engagement and disengagement. During continuous starting and shifting on slopes or unpaved roads, the clutch temperature will inevitably become too high; conversely, in low-temperature winter conditions, the clutch temperature will inevitably become too low. Both of these conditions alter the clutch's torque transmission characteristics, thus affecting driving comfort and clutch lifespan.

[0003] Chinese patent CN217977108U provides a wind-cooled heat dissipation system and vehicle based on a clutch, including: a temperature sensor installed on the clutch housing and connected to the controller on the vehicle via a controller local area network (CAN) line, used to monitor the temperature of the working chamber inside the clutch housing and send an over-temperature signal to the controller when the working chamber temperature exceeds a preset temperature value; and a heat dissipation device connected to the controller, used to introduce a flow of cold air to cool the working chamber inside the clutch housing when triggered by the over-temperature signal.

[0004] However, although the air-cooled heat dissipation system can ensure that the clutch temperature is below the set temperature, it requires the addition of heat dissipation equipment on the basis of the original clutch, the overall structure is relatively complex, and it cannot heat up when the clutch temperature is low, resulting in poor cold-state characteristics of the clutch. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of existing heat treatment systems requiring the addition of heat dissipation equipment to the original clutch, resulting in a complex overall structure, inability to raise the temperature when the clutch temperature is low, and poor cold-state characteristics of the clutch. The invention provides an AMT clutch thermal management system and its control method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An AMT clutch thermal management system, characterized by:

[0008] This includes temperature sensors, signal transceivers, transmission controllers, heat exchange modules, electric water pumps, and engine cooling systems;

[0009] A temperature sensor is installed on the clutch pressure plate to detect the temperature at the clutch pressure plate in real time. The output of the temperature sensor is electrically connected to the input of the transmission controller through a signal transceiver installed on the clutch actuator.

[0010] The heat exchange module is installed on the inner wall of the clutch housing. The output end of the engine cooling system is connected to the input end of the heat exchange module, and the input end is connected to the output end of the heat exchange module.

[0011] The electric water pump is installed at the output end of the engine cooling system to control the on / off state of the engine cooling system output end. Its control end is electrically connected to the control end of the transmission controller. The transmission controller is used to control the start and stop of the electric water pump based on the temperature information detected by the temperature sensor.

[0012] Furthermore, there are two temperature sensors, which are installed at different positions on the clutch pressure plate;

[0013] There are two signal transceivers, which are installed on the clutch actuator near the two temperature sensors. Their input terminals are electrically connected to the two temperature sensors, and their output terminals are electrically connected to the two input terminals of the gearbox controller.

[0014] Furthermore, the input of the signal transceiver is electrically connected to the output of the temperature sensor via Bluetooth;

[0015] The outputs of the two signal transceivers are electrically connected to the two inputs of the gearbox controller via wiring harnesses.

[0016] Furthermore, the engine cooling system includes a cooling water source, an inlet pipe, and an outlet pipe;

[0017] The cooling water source stores cooling water for cooling the engine, with a temperature range of 50° to 90°.

[0018] One end of the inlet pipe and one end of the outlet pipe are connected to the output end and the input end of the cooling water source, respectively.

[0019] The other end of the inlet pipe is connected to the input end of the cooling water pump, the output end of the cooling water pump passes through the clutch housing and is connected to the input end of the heat exchange module, and the other end of the outlet pipe passes through the clutch housing and is connected to the output end of the heat exchange module.

[0020] Furthermore, the transmission controller is a TCU.

[0021] Meanwhile, the present invention also provides a control method for an AMT clutch thermal management system, which is characterized by including the following steps:

[0022] Step 1: Detect the temperature information of the clutch pressure plate in real time using a temperature sensor, and send the obtained temperature information to the signal transceiver;

[0023] Step 2: Forward the temperature information to the transmission controller via a signal transceiver;

[0024] Step 3: The transmission controller compares the temperature information with the preset temperature range. If the temperature information is not within the preset first temperature range, the transmission controller controls the electric water pump to operate at full power, delivering coolant from the engine cooling system to the heat exchange module to cool / heat the clutch pressure plate until the temperature information is within the preset first temperature range. Once the temperature is within the first temperature range, the transmission controller controls the electric water pump to operate at half power until the temperature sensor detects that the temperature is within the second temperature range. If the temperature information is within the preset second temperature range, the transmission controller controls the electric water pump to stop.

[0025] Furthermore, in step 3, the preset first temperature range is -20℃ to 220℃, and the preset second temperature range is 20° to 180°.

[0026] Furthermore, step 2 also includes: obtaining the real-time clutch slip time of the transmission through the transmission controller;

[0027] Step 3 also includes determining whether the clutch slippage time exceeds a first preset time through the gearbox controller, and controlling the electric water pump to operate at full power for a second preset time if the first preset time is exceeded.

[0028] Furthermore, the first preset time is 10 seconds, and the second preset time is 100 seconds.

[0029] The beneficial effects of this invention are:

[0030] 1. This invention, by installing a temperature sensor on the clutch pressure plate, can monitor the temperature of the clutch pressure plate in real time and transmit it to the transmission controller via a signal transceiver. The temperature sensor is compared with a preset temperature range. When the measured value of the temperature sensor is within the preset temperature range, the electric water pump does not work. When the measured value of the temperature sensor exceeds the preset temperature range, the clutch controller activates the electric water pump, quickly connecting it to the engine cooling system to rapidly heat / cool the clutch pressure plate, maintaining the clutch torque transmission characteristics at a stable value, ensuring the vehicle's operating condition. This solves the problem of the vehicle being unable to start quickly after the clutch overheats, protects the clutch from excessive wear, and ensures comfort during starting and shifting.

[0031] 2. This invention integrates a thermal management module into the engine cooling system, thereby managing the clutch temperature through the engine cooling system. The temperature regulation effect is excellent. The cooling water stored in the engine cooling system is 50°-90°C. The temperature difference between the two can be used to manage the clutch pressure plate temperature without the need for an additional cooling system, resulting in a simple structure.

[0032] 3. When the temperature sensor is abnormal or has errors, the present invention can obtain the clutch slip time through the gearbox controller, and force the electric water pump to start by using the clutch slip time to dissipate heat from the clutch pressure plate, thereby increasing the redundancy and safety of the system.

[0033] 4. The present invention arranges the radiator inside the clutch housing, which helps to reduce the radiator's placement area, reduce costs, mitigate the impact of the external environment on the heat dissipation system, and reduce collisions and pipe swaying. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of an embodiment of the AMT clutch thermal management system of the present invention;

[0035] Figure 2 This is a flowchart of an embodiment of the control method for an AMT clutch thermal management system according to the present invention.

[0036] In the picture:

[0037] 01-Clutch pressure plate, 02-Clutch housing, 03-Clutch actuator;

[0038] 1-Temperature sensor, 2-Signal transceiver, 3-Transmission controller, 4-Heat exchange module, 5-Electric water pump, 6-Engine cooling system, 61-Cooling water source, 62-Inlet pipe, 63-Outlet pipe. Detailed Implementation

[0039] To make the objectives, advantages, and features of the present invention clearer, the following detailed description of an AMT clutch thermal management system and its control method, in conjunction with the accompanying drawings and specific embodiments, will further clarify the advantages and features of the present invention. The advantages and features of the present invention will become clearer from the following specific embodiments.

[0040] This embodiment describes an AMT clutch thermal management system. (See also...) Figure 1 Specifically, it includes a temperature sensor 1, a signal transceiver 2, a gearbox controller 3, a heat exchange module 4, an electric water pump 5, and an engine cooling system 6.

[0041] In this embodiment, two temperature sensors 1 are provided, each installed at a different position on the clutch pressure plate 01, thereby comprehensively acquiring the temperature of the clutch pressure plate 01 and improving the accuracy of temperature detection. Of course, in other embodiments of the present invention, one, three, or other sensors may be provided, and the specific number can be set according to actual needs and costs.

[0042] Accordingly, this embodiment includes two signal transceivers 2, which are respectively mounted on the clutch actuator 03 and positioned close to the two temperature sensors 1. The input terminals of the two signal transceivers 2 are electrically connected to the output terminals of the two temperature sensors 1 via Bluetooth, eliminating the need for wiring harnesses and simplifying the structure. The output terminals of the two signal transceivers 2 are connected to the input terminals of the transmission controller 3 via wiring harnesses, thereby promptly sending the actual temperature information detected by the temperature monitors to the transmission controller 3 for further analysis and processing.

[0043] The heat exchange module 4 is installed on the inner wall of the clutch housing 02. Specifically, the engine cooling system 6 includes a cooling water source 61, an inlet pipe 62, and an outlet pipe 63. The cooling water source 61 stores cooling water. One end of the inlet pipe 62 and the outlet pipe 63 are connected to the output and input ends of the cooling water source 61, respectively. The other end of the inlet pipe 62 is connected to the input end of the cooling water pump. The output end of the cooling water pump passes through the clutch housing 02 and is connected to the input end of the heat exchange module 4. The cooling water pump controls the on / off state of the cooling system output end, thereby controlling whether cooling water enters the heat exchange module 4. The other end of the outlet pipe 63 passes through the clutch housing 02 and is connected to the output end of the heat exchange module 4. The heat exchange module 4 can use a heat exchanger commonly used in the field, which can realize heat exchange and quickly dissipate the high-temperature energy inside the clutch.

[0044] The transmission controller 3 is specifically a TCU. The control terminal of the transmission controller 3 is electrically connected to the control terminal of the cooling water pump. The transmission controller 3 controls the start and stop of the electric water pump 5 according to the temperature information forwarded by the information transceiver. Thus, when the temperature of the clutch pressure plate 01 is too high, the electric water pump 5 delivers cooling water to the heat exchange module 4 to achieve rapid cooling and heat dissipation of the clutch pressure plate 01.

[0045] This embodiment discloses a control method for an AMT clutch thermal management system, which specifically includes the following steps:

[0046] Step 1: The temperature information of the clutch pressure plate 01 is detected in real time by temperature sensor 1, and the obtained temperature information is sent to signal transceiver 2;

[0047] Step 2: The temperature information is forwarded to the transmission controller 3 via the signal transceiver 2;

[0048] Step 3: The transmission controller 3 compares the temperature information with the preset temperature range. If the temperature information is not within the preset first temperature range (-20°C to 220°C), the transmission controller 3 controls the electric water pump 5 to operate at full power, delivering the cooling water from the engine cooling system 6 to the heat exchange module 4 to cool / heat the clutch pressure plate 01 until the temperature information is within the preset first temperature range. Once the temperature is within the first temperature range, the transmission controller 3 controls the electric water pump 5 to operate at half power until the temperature sensor 1 detects that the temperature is within the second temperature range (20°C to 180°C), thus improving energy efficiency. If the temperature information is within the preset second temperature range, the transmission controller 3 controls the electric water pump 5 to stop.

[0049] Since the coolant in the engine cooling system 6 heats up quickly after the engine starts, and the engine fan controls the water temperature to be between 50°C and 90°C, which is significantly different from the preset temperature range of the clutch pressure plate 01, the engine cooling system 6 can be used to heat up or cool down the clutch pressure plate 01.

[0050] In addition, to avoid abnormalities and errors in the temperature sensor 1, the present invention can obtain the clutch slip time through the transmission controller 3. The preset clutch slip time is 10 seconds. When the clutch slip time exceeds the 10-second threshold, the transmission controller 3 will force the cooling water pump 5 to work at full power and run it for 100 seconds at a time, and turn on the heat exchanger 4 to cool the clutch pressure plate 01.

Claims

1. An AMT clutch thermal management system, characterized in that: It includes a temperature sensor (1), a signal transceiver (2), a gearbox controller (3), a heat exchange module (4), an electric water pump (5), and an engine cooling system (6); The temperature sensor (1) is installed on the clutch pressure plate (01) and is used to detect the temperature at the clutch pressure plate (01) in real time. The output end of the temperature sensor (1) is electrically connected to the input end of the gearbox controller (3) through the signal transmitter (2) installed on the clutch actuator (03). The heat exchange module (4) is installed on the inner wall of the clutch housing (02). The output end of the engine cooling system (6) is connected to the input end of the heat exchange module (4), and the input end is connected to the output end of the heat exchange module (4). The electric water pump (5) is installed on the output end of the engine cooling system (6) and is used to control the on / off state of the output end of the engine cooling system (6). Its control end is electrically connected to the control end of the gearbox controller (3). The gearbox controller (3) is used to control the start and stop of the electric water pump (5) according to the temperature information detected by the temperature sensor (1); to obtain the real-time clutch slip time of the gearbox through the gearbox controller (3); to determine whether the clutch slip time exceeds the first preset time through the gearbox controller (3), and if it exceeds the first preset time, to control the electric water pump (5) to work at full power for a second preset time; if the temperature If the information is not within the preset first temperature range, the gearbox controller (3) controls the electric water pump (5) to work at full power to deliver the cooling water in the engine cooling system (6) to the heat exchange module (4) to cool / heat the clutch pressure plate (01) until the temperature information is within the preset first temperature range. After running within the first temperature range, the gearbox controller (3) controls the electric water pump (5) to work at half power until the temperature sensor (1) measures the temperature range within the second temperature range. If the temperature information is within the preset second temperature range, the gearbox controller (3) controls the electric water pump (5) to stop.

2. The AMT clutch thermal management system according to claim 1, characterized in that: There are two temperature sensors (1), which are installed at different positions on the clutch pressure plate (01); There are two signal transceivers (2). The two signal transceivers (2) are respectively installed on the clutch actuator (03) near the two temperature sensors (1). Their input ends are electrically connected to the two temperature sensors (1) respectively, and their output ends are electrically connected to the two input ends of the gearbox controller (3) respectively.

3. The AMT clutch thermal management system according to claim 2, characterized in that: The input terminal of the signal transceiver (2) is electrically connected to the output terminal of the temperature sensor (1) via Bluetooth; The output terminals of the two signal transceivers (2) are electrically connected to the two input terminals of the gearbox controller (3) via wiring harnesses.

4. An AMT clutch thermal management system according to any one of claims 1-3, characterized in that: The engine cooling system (6) includes a cooling water source (61), an inlet pipe (62), and an outlet pipe (63); The cooling water source (61) stores cooling water for cooling the engine, with a temperature range of 50° to 90°. One end of the water inlet pipe (62) and the water outlet pipe (63) are respectively connected to the output end and the input end of the cooling water source (61); The other end of the water inlet pipe (62) is connected to the input end of the cooling water pump, the output end of the cooling water pump passes through the clutch housing (02) and is connected to the input end of the heat exchange module (4), and the other end of the water outlet pipe (63) passes through the clutch housing (02) and is connected to the output end of the heat exchange module (4).

5. The AMT clutch thermal management system according to claim 4, characterized in that: The gearbox controller (3) is a TCU.

6. A control method for the AMT clutch thermal management system according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: The temperature information of the clutch pressure plate (01) is detected in real time by the temperature sensor (1), and the obtained temperature information is sent to the signal receiver (2); Step 2: The temperature information is forwarded to the gearbox controller (3) via the signal transceiver (2); the real-time clutch slip time of the gearbox is obtained through the gearbox controller (3); Step 3: The transmission controller (3) compares the temperature information with the preset temperature range. If the temperature information is not within the preset first temperature range, the transmission controller (3) controls the electric water pump (5) to work at full power to deliver the cooling water in the engine cooling system (6) to the heat exchange module (4) to cool / heat the clutch pressure plate (01) until the temperature information is within the preset first temperature range. After running within the first temperature range, the transmission controller (3) controls the electric water pump (5) to work at half power until the temperature sensor (1) measures the temperature range within the second temperature range. If the temperature information is within the preset second temperature range, the transmission controller (3) controls the electric water pump (5) to stop. The transmission controller (3) determines whether the clutch slip time exceeds the first preset time, and if it exceeds the first preset time, controls the electric water pump (5) to work at full power for the second preset time.

7. The control method for an AMT clutch thermal management system according to claim 6, characterized in that: In step 3, the preset first temperature range is -20℃ to 220℃, and the preset second temperature range is 20° to 180°.

8. The control method for an AMT clutch thermal management system according to claim 7, characterized in that: The first preset time is 10 seconds, and the second preset time is 100 seconds.

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