Thermostatic control system based on automatic transmission and its operation method

Abstract

The present invention provides a temperature control system based on an automatic transmission and an operation method thereof. The temperature control system includes: an engine, a temperature control module, a radiator, a heater core, a valve, a transmission heat exchanger, and a water pump; the temperature control module can be switched to three working states. Among them, in the first working state, the input end of the temperature control module is communicated with its first output end; in the second working state, the input end of the temperature control module is communicated with its second output end, and the output end of the valve is communicated with its second input end; in the third working state, the input end of the temperature control module is communicated with its third output end, and the output end of the valve is communicated with its first input end. The present invention takes into account both the heating function and the heat dissipation function of the engine and the transmission heat exchanger, can control the transmission oil temperature within an optimal temperature range, improve the transmission efficiency of the transmission while ensuring that the engine thermal efficiency is not affected, and reduce the vehicle fuel consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly relates to a temperature control system based on an automatic transmission and an operation method thereof. Background Art

[0002] With the development of automobile technology, higher requirements are imposed on the overall vehicle thermal efficiency. On the premise of meeting the cooling requirements of the whole vehicle, the overall vehicle thermal management rationally coordinates and distributes the whole energy, reduces unnecessary energy losses, and thus reduces the fuel consumption of the whole vehicle. On the one hand, when a motor vehicle starts without warm-up, it takes a relatively long time to warm up by relying on the heat generated by the transmission itself, generally lasting for 30 minutes or longer. During this period, the transmission efficiency is relatively low. On the other hand, when the engine meets the heat dissipation requirements of the whole machine, in order to improve the thermal efficiency of the engine, a relatively high opening temperature of the large circulation is set so that the engine water temperature can work at about 100°C as much as possible, which does not match the ideal working oil temperature of the transmission (80°C - 100°C).

[0003] In some existing overall vehicle thermal management systems, the transmission heat exchanger is arranged in the small circulation of the engine. Although this solution has a certain heating function for the transmission, due to the mismatch between the ideal working water temperature of the engine and the ideal working oil temperature of the transmission, this temperature control solution for the transmission will cause the transmission to work at a relatively high working temperature for a long time, which is not conducive to the service life of the transmission, or when both the engine and the transmission require a large amount of heat dissipation under some working conditions, it cannot provide sufficient heat dissipation capacity for the transmission, resulting in overheating of the transmission.

[0004] At present, most overall vehicle thermal management systems only consider the heat dissipation function of the transmission for temperature control. The main implementation method is to arrange the transmission heat exchanger in the large circulation of the engine, or directly use an air-cooled transmission heat exchanger to dissipate heat from the transmission alone, and it does not have a heating function for the transmission.

[0005] Therefore, there is an urgent need for a temperature control system based on an automatic transmission and an operation method thereof to solve the above problems. Summary of the Invention

[0006] The technical problem solved by the present invention is to provide a temperature control system based on an automatic transmission and an operation method thereof, which can solve the problem that the prior art cannot take into account both the heating function and the heat dissipation function of the transmission heat exchanger.

[0007] The technical problem of the present invention is solved by adopting the following technical solutions:

[0008] A temperature control system based on an automatic transmission, comprising: an engine, a temperature control module, a radiator, a heater core, a valve, a transmission heat exchanger, and a water pump; the output end of the engine is connected to the input end of the temperature control module; the first output end of the temperature control module is connected to the water pump, the second output end is connected to the heater core, and the third output end is connected to the radiator; the output end of the radiator is respectively connected to the first input end of the valve and the input end of the water pump; the output end of the heater core is respectively connected to the second input end of the valve and the input end of the water pump; the output end of the valve is connected to the input end of the transmission heat exchanger; the output end of the transmission heat exchanger is connected to the input end of the water pump; the output end of the water pump is connected to the input end of the engine; the temperature control module can be switched to three working states, wherein, in the first working state, the input end of the temperature control module is communicated with the first output end; in the second working state, the input end of the temperature control module is communicated with the second output end; in the third working state, the input end of the temperature control module is communicated with the third output end; the valve can be switched to two working states, wherein, when the temperature control module is in the second working state, the output end of the valve is communicated with the second input end; when the temperature control module is in the third working state, the output end of the valve is communicated with the first input end.

[0009] In a preferred embodiment of the present invention, the above temperature control system further comprises: a first throttle valve and a second throttle valve; the first throttle valve is arranged on the pipeline between the output end of the radiator and the input end of the water pump; the second throttle valve is arranged on the pipeline between the output end of the heater core and the input end of the water pump.

[0010] In a preferred embodiment of the present invention, both the above first throttle valve and the second throttle valve are solenoid valves; the valve is an electromagnetic reversing valve.

[0011] In a preferred embodiment of the present invention, the above temperature control module comprises a multi-way ball valve, and the multi-way ball valve is an electromagnetic reversing valve.

[0012] In a preferred embodiment of the present invention, when the engine water temperature is less than or equal to a first preset temperature, the temperature control module switches to the first working state; when the engine water temperature is greater than the first preset temperature and the transmission oil temperature is less than or equal to a second preset temperature, the temperature control module switches to the second working state, and the valve switches to the working state matching the second working state; when the transmission oil temperature is greater than the second preset temperature, the temperature control module switches to the third working state, and the valve switches to the working state matching the third working state.

[0013] In a preferred embodiment of the present invention, when the transmission oil temperature is greater than or equal to a third preset temperature, the temperature control module is in the third working state and is in a fully open state, and the first throttle valve increases the resistance of its branch.

[0014] In a preferred embodiment of the present invention, the above temperature control system further includes: a temperature detection device; the temperature detection device is used to obtain the engine water temperature information and the transmission oil temperature information.

[0015] In a preferred embodiment of the present invention, the above temperature control system further includes: an expansion tank; the input end of the expansion tank is respectively connected to the output end of the engine and the output end of the radiator, and the output end of the expansion tank is connected to the input end of the water pump.

[0016] An operation method of a temperature control system based on an automatic transmission according to any one of the above, including the following steps: when the engine water temperature is less than or equal to a first preset temperature, the temperature control module switches to a first working state and enters the engine warm-up mode: the flow sequence of the coolant is the water pump, the engine, the temperature control module, and the water pump; when the engine water temperature is greater than the first preset temperature and the transmission oil temperature is less than or equal to a second preset temperature, the temperature control module switches to a second working state, and the valve switches to a working state matching the second working state, and enters the transmission warm-up mode: the flow sequence of the coolant is the water pump, the engine, the temperature control module, the heater core, the valve, the transmission heat exchanger, and the water pump; when the transmission oil temperature is greater than the second preset temperature, the temperature control module switches to a third working state, and the valve switches to a working state matching the third working state, and enters the transmission traditional cooling mode: the flow sequence of the coolant is the water pump, the engine, the temperature control module, the radiator, the valve, the transmission heat exchanger, and the water pump; when the transmission oil temperature is greater than or equal to a third preset temperature, the temperature control module is in the third working state and is fully opened, and the first throttle valve increases the resistance of its branch to enter the transmission forced cooling mode, and when the transmission oil temperature is less than a fourth preset temperature, it exits the transmission forced cooling mode and enters the transmission traditional cooling mode.

[0017] In a preferred embodiment of the present invention, the above third preset temperature is greater than the fourth preset temperature, and the fourth preset temperature is greater than the second preset temperature.

[0018] The technical effects achieved by the present invention using the above technical solutions are as follows: By combining the temperature control module and the multi-way valve for control, when the vehicle is just started, the engine is warmed up. After the engine warm-up is completed, when the transmission oil temperature is relatively low, the coolant heated by the engine is introduced into the transmission heat exchanger to heat the transmission oil temperature / warm up the transmission. When the transmission oil temperature is relatively high, higher than the ideal operating oil temperature, the coolant cooled by the radiator is introduced into the transmission heat exchanger to cool the transmission oil temperature, so as to ensure that the transmission is always in the ideal operating temperature range. It takes into account both the heating function and the heat dissipation function of the engine and the transmission heat exchanger, reduces the warm-up time of the engine and the transmission when the vehicle starts, and can provide sufficient heat dissipation power when the transmission needs to dissipate heat, ensuring that the transmission is always in the ideal operating temperature range, guaranteeing the reliability and durability of the transmission, improving the transmission efficiency, and reducing the fuel consumption of the whole vehicle.

[0019] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, details are described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the description and form a part of this description, showing embodiments consistent with the present invention and, together with the description, are used to explain the principles of the present invention.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a structural block diagram of a temperature control system based on an automatic transmission shown in the first embodiment of the present invention.

[0023] Figure 2 It is a structural block diagram of a temperature control system based on an automatic transmission shown in the second embodiment of the present invention.

[0024] Figure 3 It is a structural block diagram of a temperature control system based on an automatic transmission shown in the third embodiment of the present invention.

[0025] Figure 4 It is a flowchart of the operation method of the temperature control system based on an automatic transmission shown in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To further illustrate the technical means and effects adopted by the present invention to achieve the intended invention purpose, the embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the embodiments of the present invention. Through the description of the specific implementation manners, the technical means and effects adopted by the present invention to achieve the intended purpose can be more deeply and specifically understood, and the accompanying drawings are only for reference and illustration, and are not used to limit the present invention.

[0027] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the presence of another identical element in the process, method, article or device including that element. In addition, components, features, and elements with the same name in different embodiments of the present invention may have the same meaning or different meanings, and their specific meanings need to be determined by their explanations in the specific embodiments or further in combination with the context of the specific embodiments.

[0028] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this document, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted inclusively, or meaning either one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". An exception to this definition only occurs when the combination of elements, functions, steps, or operations are mutually exclusive in some way.

[0029] In the following description, the use of suffixes such as "module", "component", or "unit" to denote elements is only for the convenience of describing the present invention, and they have no specific meaning in themselves. Therefore, "module", "component", or "unit" can be used interchangeably.

[0030] It should be noted that in this document, step codes such as S11, S12, etc. are used. The purpose is to more clearly and briefly express the corresponding content and do not constitute a substantial limitation in terms of order. Those skilled in the art may execute S12 first and then S11, etc. during specific implementation, but these should all be within the protection scope of the present invention. Moreover, the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages do not necessarily need to be executed at the same time, but can be executed at different times, and their execution order does not necessarily need to be sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0031] The temperature control system described in the present invention functions to heat the engine water temperature to the ideal working state when the vehicle is just started, and when the engine water temperature and / or the transmission oil temperature exceed the ideal temperature, timely dissipate heat from the engine and / or the transmission to ensure that the engine and / or the transmission work in the most suitable temperature state.

[0032] Please refer to Figure 1, which is a structural block diagram of a temperature control system based on an automatic transmission shown in the first embodiment of the present invention. The temperature control system may include components such as a water pump 11, an engine 12, a temperature control module 13, a radiator 14, a heater core 15, a valve 16, and a transmission heat exchanger 17. Those skilled in the art can understand that Figure 1 the structure of the temperature control system shown in

[0033] does not limit the temperature control system. The temperature control system may include more or fewer components than those shown, or combine certain components, or have different component arrangements.

[0034] The coolant in the temperature control system of the present invention may be, but is not limited to, water, and may also be antifreeze, etc.

[0035] The cooling method of the engine 12 can be divided into air cooling and water cooling according to different cooling media. If the device that directly dissipates the heat of the high-temperature parts in the engine 12 into the atmosphere for cooling is called air cooling. And the device that first transfers these heats to the cooling water and then dissipates them into the atmosphere for cooling is called water cooling. Since water cooling has uniform cooling, good effect, and low operating noise of the engine 12. Therefore, water cooling is widely used in current automotive engines 12.

[0036] A low engine water temperature will increase fuel consumption and form carbon deposits, and seriously cause abnormal wear of the engine, greatly reducing the service life of the engine 12. If the engine water temperature is too high and the heat dissipation is poor, the temperature of the internal components of the engine 12 will be too high. The parts will expand due to heat, which will affect the normal clearance fit, resulting in the movement parts being blocked or even stuck. In addition, it will also cause the mechanical strength of the engine 12 components to decline and the lubricating oil to lose its function, etc. Therefore, it is necessary to make the engine water temperature quickly reach the ideal working temperature after the engine starts, and after reaching the ideal working temperature, dissipate heat through the coolant to keep the engine water temperature at the ideal working temperature. Specifically, the engine water temperature mentioned above refers to the temperature of the antifreeze. Antifreeze is a liquid composed of antifreeze additives, additives to prevent metal corrosion, and water. It needs to have the properties of antifreeze, corrosion prevention, heat conduction, and non-degradation. Now, antifreeze with ethylene glycol as the main component, added with anti-corrosion additives and water is often used. The coolant water is preferably soft water, which can prevent the formation of scale in the engine water jacket, resulting in blocked heat transfer and engine overheating. Adding an antifreeze agent to the water also increases the boiling point of the coolant, which can play an additional role in preventing the coolant from boiling prematurely.

[0037] The temperature control module 13 functions equivalently to an electronic thermostat. The temperature control module 13 is used to determine whether to operate in a "small cycle without passing through the radiator" or a "large cycle passing through the radiator". In one embodiment of the present invention, the temperature control module 13 has one input terminal and three output terminals; connecting the input terminal to different output terminals can enable the temperature control system to enter different modes. By flexibly controlling the connection of different output terminals of the temperature control module 13 to the input terminal, the engine and / or transmission can be heated respectively, or the engine and transmission can be cooled.

[0038] When the engine is operating, the coolant passing through the transmission heat exchanger and the engine becomes hot after absorbing the heat in the transmission heat exchanger and the engine. The hot coolant flows into the core of the radiator 14, and air passes outside the core of the radiator 14. The hot coolant cools down again by dissipating heat to the air.

[0039] The heater core 15 is used to cool the relatively high-temperature coolant flowing out of the engine (after the engine water temperature reaches a predetermined temperature, heat dissipation is required to maintain the temperature within the ideal operating temperature range). However, the temperature of the coolant after being cooled by the heater core is higher than the transmission oil temperature, and it can still heat the transmission oil temperature (in winter, when the air conditioner is turned on, the heater core is turned on).

[0040] The valve 16 is a three-way valve in one embodiment, and it has two input branches, namely a heating branch and a cooling branch. The opening and closing of the heating branch and the cooling branch are associated with the temperature control module 13.

[0041] The transmission heat exchanger 17 is mainly for heat exchange transfer between hot and cold. When the coolant temperature is higher than the temperature inside the transmission heat exchanger, the hot coolant can heat the transmission. When the coolant temperature is lower than the temperature inside the transmission heat exchanger (transmission oil temperature), the cold coolant can cool the transmission.

[0042] Such as Figure 1As shown, the output end of the water pump 11 is connected to the input end of the engine 12; the output end of the engine 12 is connected to the input end of the temperature control module 13; the first output end of the temperature control module 13 is connected to the water pump 11, the second output end is connected to the heater core 15, and the third output end is connected to the radiator 14; the output end of the radiator 14 is respectively connected to the first input end of the valve 16 and the input end of the water pump 11; the output end of the heater core 15 is respectively connected to the second input end of the valve 16 and the input end of the water pump 11; the output end of the valve 16 is connected to the input end of the transmission heat exchanger 17; the output end of the transmission heat exchanger 17 is connected to the input end of the water pump 11. The temperature control module can be switched to three working states. Among them, in the first working state, the input end of the temperature control module is communicated with the first output end; in the second working state, the input end of the temperature control module is communicated with the second output end; in the third working state, the input end of the temperature control module is communicated with the third output end; the valve can be switched to two working states. Among them, when the temperature control module is in the second working state, the output end of the valve is communicated with the second input end; when the temperature control module is in the third working state, the output end of the valve is communicated with the first input end. Among them, the temperature control module 13 includes a multi-way ball valve, which is an electromagnetic reversing valve, so that the temperature control module 13 can execute different working states. And the opening degrees of the respective output ends (each branch / multi-way ball valve) can be controlled electrically. The valve 16 is a three-way valve, which is an electromagnetic reversing valve, and the opening of each branch (each input end, that is, the heating branch and the cooling branch) can also be controlled electrically.

[0043] In one embodiment, the temperature control system further includes: a temperature detection device (not shown in the figure). The temperature detection device includes a temperature sensor, a water temperature sensor, an oil temperature sensor, etc., which are respectively arranged on the engine 12 and the transmission heat exchanger 17 to monitor the engine water temperature and the transmission oil temperature in real time.

[0044] Specifically, the output end of the radiator 14 is connected to the cooling branch of the valve 16 and the input end of the water pump 11 through pipelines respectively; after being cooled by the radiator 14, the coolant with reduced temperature flows out from the output end of the radiator, and a part of it enters the cooling branch (entering the transmission heat exchanger), and the other part enters the water pump 11 (mixes with the coolant coming out of the transmission heat exchanger and enters the engine).

[0045] When the temperature control module 13 controls the input end to communicate with its first output end through the multi-way ball valve (that is, the input end does not communicate with the second and third output ends), the coolant does not pass through the radiator 14 or the transmission heat exchanger 17. At this time, the coolant circuit is: water pump 11 - engine 12 - temperature control module 13 - water pump 11. Under this circuit, the engine warms up by itself, enabling the engine's own water temperature to quickly reach the first preset temperature / ideal operating temperature range (such as 80°C, 85°C, etc.), thereby reducing the engine's frictional losses and ensuring the engine's thermal efficiency.

[0046] When the temperature control module 13 controls the input end to communicate with its second output end through the multi-way ball valve, the valve 16 synchronously opens the heating branch and closes the cooling branch. At this time, the coolant circuit is: water pump 11 - engine 12 - temperature control module 13 - heater core 15 - valve 16 - transmission heat exchanger 17 - water pump 11 (and another circuit: water pump 11 - engine 12 - temperature control module 13 - heater core 15 - water pump 11). Under this circuit, after the coolant passes through the heater core 15, a part of it enters the transmission heat exchanger 17 to heat the transmission / to heat the transmission oil temperature, enabling the transmission oil temperature to rise to the second preset temperature / ideal operating temperature range (such as 75°C, 80°C, etc.) as quickly as possible, thereby reducing the transmission's frictional losses, improving the transmission's transmission efficiency, and reducing the vehicle's overall fuel consumption.

[0047] When the temperature control module 13 controls the input end to communicate with its third output end through the multi-way ball valve, the valve 16 synchronously opens the cooling branch and closes the heating branch. At this time, the coolant circuit is: water pump 11 - engine 12 - temperature control module 13 - radiator 14 - valve 16 - transmission heat exchanger 17 - water pump 11 (and another circuit: water pump 11 - engine 12 - temperature control module 13 - radiator 14 - water pump 11, which can dissipate heat from the engine and maintain the engine's thermal efficiency). Under this circuit, after the coolant is cooled by the radiator 14, a part of it enters the transmission heat exchanger 17, and the other part enters the engine 12 through the water pump 11, meeting the heat dissipation requirements of the transmission and the engine.

[0048] Engine warm-up mode (small cycle): When the engine water temperature is less than or equal to the first preset temperature (such as 80°C), the input end of the temperature control module 13 communicates with the first output end to warm up the engine.

[0049] Transmission warm-up mode (small cycle circuit): When the engine water temperature is greater than the first preset temperature (such as 80°C) and the transmission oil temperature is less than or equal to the second preset temperature (such as 75°C), the input end of the temperature control module 13 communicates with the second output end, and the second input end of the valve 16 communicates with the output end to heat and warm up the transmission.

[0050] Traditional cooling mode of the transmission (large cycle): When the transmission oil temperature is greater than the second preset temperature (e.g., 75 °C), the input end of the temperature control module is connected to the third output end, and the first input end of the valve is connected to the output end to dissipate heat from the engine and the transmission. In this mode, according to the heat dissipation requirements of the transmission and / or the engine, the temperature control module 13 automatically adjusts the opening degree to control the coolant flow rate.

[0051] In the above modes (engine warm-up mode, transmission warm-up mode, and traditional transmission cooling mode), the transmission follows the heat dissipation requirements of the engine. When the large cycle is turned on, the transmission heat exchanger dissipates heat from the transmission. When the large cycle is turned off, the transmission heat exchanger does not work.

[0052] When the transmission oil temperature is greater than or equal to the third preset temperature (e.g., 100 °C), the transmission requests to enter the transmission forced cooling mode: The temperature control module 13 controls the input end to be connected to its own third output end and is in a fully open state through the multi-way ball valve (the branch connecting the temperature control module 13 to the radiator is fully opened, that is, the large cycle branch of the temperature control module is fully opened), and the first input end of the valve 16 is connected to the output end (the heat dissipation branch is fully opened) to ensure that the maximum coolant flow rate that the temperature control system can provide flows into the transmission heat exchanger 17 from the output end of the radiator 14 to dissipate heat from the transmission.

[0053] If the transmission requests the large cycle branch of the temperature control module 13 to be fully open for a long time, it will cause a decrease in the thermal efficiency of the engine 12, which is not conducive to the vehicle fuel consumption. Therefore, the present invention also sets a fourth preset temperature (e.g., 95 °C) for the transmission to request the temperature control module 13 to exit the transmission forced cooling mode in the control process, that is, when the transmission temperature is lower than 95 °C, the transmission will withdraw the request for the large cycle branch of the temperature control module 13 to be fully open, and the transmission will execute the traditional cooling mode and continue to dissipate heat following the heat dissipation requirements of the engine.

[0054] For the temperature control system based on an automatic transmission in this embodiment, during the engine warm-up process, it enters the first working state (disconnecting the heater core and the radiator) through the temperature control module, giving priority to the engine warm-up, reducing the frictional loss of the engine, and ensuring the thermal efficiency of the engine. When the engine water temperature reaches 80 °C / above the first preset temperature and the warm-up state ends, by controlling the temperature control module, the temperature control module enters the second working state (connecting the heater core). By controlling the three-way valve, the heating branch of the three-way valve is opened and the cooling branch is closed. The coolant with a higher temperature after passing through the engine flows into the transmission heat exchanger through the heater core to heat the transmission oil temperature until the transmission oil temperature reaches 75 °C / above the second preset temperature. After the transmission warm-up is completed (transmission oil temperature ≥ 75 °C / second preset temperature), the temperature control module enters the third working state (connecting the radiator). The three-way valve closes the heating branch and opens the cooling branch. The transmission dissipates heat according to the heat dissipation requirement of the engine. At this time, the heat dissipation requirements of the transmission and the engine are basically the same. With the opening of the large circulation and the change of the opening degree of the multi-way ball valve of the temperature control module, the heat dissipation requirements of the transmission and the engine can be basically met. When the heat dissipation requirement of the transmission is large and inconsistent with the heat dissipation requirement of the engine, that is, when simply relying on the opening degree of the engine requesting the opening of the large circulation for heat dissipation cannot meet the heat dissipation requirement of the transmission (transmission oil temperature is greater than 100 °C / third preset temperature), the transmission requests the temperature control module to fully open the large circulation branch, so that the cooling flow rate entering the transmission heat exchanger through the cooling branch reaches the maximum to ensure sufficient heat dissipation of the transmission heat exchanger. When the transmission temperature is lower than 95 °C / fourth preset temperature, the transmission will withdraw the request for fully opening the large circulation branch of the temperature control module, and the transmission executes the traditional cooling mode and dissipates heat according to the heat dissipation requirement of the engine.

[0055] Please refer to Figure 2 , Figure 2 which is the structural block diagram of a temperature control system based on an automatic transmission shown in the second embodiment of the present invention. As Figure 2 shown, the difference between this embodiment and the first embodiment is:

[0056] The temperature control system further includes: a first throttle valve 18 and a second throttle valve 19; the first throttle valve 18 is arranged on the pipeline between the output end of the radiator 14 and the input end of the water pump 11; the second throttle valve 19 is arranged on the pipeline between the output end of the heater core 15 and the input end of the water pump 11. Among them, both the first throttle valve and the second throttle valve are solenoid valves, and the resistance / opening degree in the direction of the water pump 11 can be electronically controlled.

[0057] The purpose of the first throttle valve 18 is to increase the resistance of the branch where it is located, so that more coolant enters the other branch / the heat dissipation branch (entering the transmission heat exchanger 17). If the first throttle valve 18 is not provided, due to the relatively large resistance of the heat dissipation branch of the valve 16, less coolant enters the transmission heat exchanger 17, which may not meet the heat dissipation requirements of the transmission.

[0058] Similarly to the first throttle valve 18, the function of the second throttle valve 19 is to increase the resistance of the branch where it is located, so that the coolant flowing out of the heater core 15 can flow through the heating branch of the valve 16 more and enter the transmission heat exchanger 17 to heat the transmission.

[0059] In this embodiment, for the transmission forced cooling mode: when the transmission oil temperature is greater than or equal to the third preset temperature (e.g., 100 °C), the input end and the third output end of the temperature control module 13 are connected and in a fully open state (the opening degree of the branch where the temperature control module 13 is connected to the radiator is 100% fully open), the first input end and the output end of the valve 16 (the heat dissipation branch is fully open) are connected, and the first throttle valve 18 increases the resistance of its own branch / reduces the opening degree to make more coolant flow out through the other branch (the heat dissipation branch), ensuring that the maximum coolant flow rate that the temperature control system can provide flows into the transmission heat exchanger 17 from the output end of the radiator 14 to dissipate heat and cool down the transmission.

[0060] The other specific contents of this embodiment are the same as those of the first embodiment. Please refer to the above first embodiment, so they will not be described in detail here.

[0061] Please refer to Figure 3 , Figure 3 which is a structural block diagram of another temperature control system based on an automatic transmission shown in the third embodiment of the present invention. As Figure 3 shown, the difference between this embodiment and the second embodiment is that:

[0062] The temperature control system further includes: an expansion tank 20; the input end of the expansion tank 20 is respectively connected to the output end of the engine 12 and the output end of the radiator 14, and the output end of the expansion tank 20 is connected to the input end of the water pump 11.

[0063] Specifically, the function of the expansion tank 20 is to store and supplement the coolant in the temperature control system due to thermal expansion and contraction. Therefore, the coolant in the expansion tank 20 cannot be filled to the brim and a certain space needs to be reserved.

[0064] In this embodiment, an output end is further provided on the engine 12 and the radiator 14 and is connected to the expansion tank 20. As the coolant temperature rises, the volume of the coolant increases due to thermal expansion and contraction. At this time, the coolant can flow through the engine 12 and / or the radiator 14 to the expansion tank 20. As the coolant temperature drops, the volume of the coolant becomes smaller. At this time, the coolant in the expansion tank 20 enters the water pump 11 and is replenished into the temperature control system.

[0065] The temperature control system based on the automatic transmission of the present invention adopts combined control of a temperature control module and a three-way valve. When the transmission oil temperature is relatively low, the coolant heated by the engine is introduced into the transmission heat exchanger to heat the transmission oil temperature. When the transmission oil temperature is relatively high and higher than the ideal operating oil temperature, the coolant flowing out from the output end of the radiator is introduced into the transmission heat exchanger to cool the transmission oil temperature, so as to ensure that the transmission is always in the ideal operating temperature range, ensure the reliability and durability of the transmission, improve the transmission efficiency of the transmission, and reduce the fuel consumption of the whole vehicle.

[0066] Please refer to Figure 4 , Figure 4 which is a flowchart of the operation method of the temperature control system based on the automatic transmission shown in the embodiment of the present invention.

[0067] As Figure 4 shown, the operation method of the temperature control system based on the automatic transmission includes the following steps:

[0068] Step S11: When the engine water temperature is less than or equal to the first preset temperature, the temperature control module switches to the first working state and enters the engine warm-up mode: the flow sequence of the coolant is water pump, engine, temperature control module, water pump;

[0069] Step S12: When the engine water temperature is greater than the first preset temperature and the transmission oil temperature is less than or equal to the second preset temperature, the temperature control module switches to the second working state, and the valve switches to the working state matching the second working state, and enters the transmission warm-up mode: the flow sequence of the coolant is water pump, engine, temperature control module, heater core, valve, transmission heat exchanger, water pump;

[0070] Step S13: When the transmission oil temperature is greater than the second preset temperature, the temperature control module switches to the third working state, and the valve switches to the working state matching the third working state, and enters the transmission traditional cooling mode: the flow sequence of the coolant is water pump, engine, temperature control module, radiator, valve, transmission heat exchanger, water pump;

[0071] Step S14: When the transmission oil temperature is greater than or equal to the third preset temperature, the temperature control module is in the third working state and is fully turned on. The first throttle valve increases the resistance of its branch to enter the transmission forced cooling mode. When the transmission oil temperature is less than the fourth preset temperature, it exits the transmission forced cooling mode and enters the transmission traditional cooling mode.

[0072] Among them, the third preset temperature is greater than the fourth preset temperature, and the fourth preset temperature is greater than the second preset temperature.

[0073] For other detailed contents of the method described in this embodiment, please refer to the above embodiment, so it will not be described in detail here.

[0074] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by hardware, or can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of a software product, and the software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the embodiments of the present invention.

[0075] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. The above embodiments and the accompanying drawings are exemplary, and the modules or processes in the drawings are not necessarily essential for implementing the embodiments of the present invention. It should not be understood as a limitation of the present invention. Within the scope of the technical concept of the present invention, various simple modifications and combinations can be made to the technical solutions of the present invention, and these simple modifications and combinations all fall within the protection scope of the present invention.

Claims

1. A temperature control system based on an automatic transmission, characterized in that, the temperature control system includes: an engine, a temperature control module, a radiator, a heater core, a valve, a transmission heat exchanger, a water pump, a first throttle valve and a second throttle valve; the output end of the engine is connected to the input end of the temperature control module; the first output end of the temperature control module is connected to the water pump, the second output end is connected to the heater core, and the third output end is connected to the radiator; the output end of the radiator is respectively connected to the first input end of the valve and the input end of the water pump; the output end of the heater core is respectively connected to the second input end of the valve and the input end of the water pump; the output end of the valve is connected to the input end of the transmission heat exchanger; the output end of the transmission heat exchanger is connected to the input end of the water pump; the output end of the water pump is connected to the input end of the engine; the first throttle valve is arranged on the pipeline between the output end of the radiator and the input end of the water pump; the second throttle valve is arranged on the pipeline between the output end of the heater core and the input end of the water pump; the temperature control module can be switched to three working states, among which, in the first working state, the input end of the temperature control module is communicated with the first output end; in the second working state, the input end of the temperature control module is communicated with the second output end; in the third working state, the input end of the temperature control module is communicated with the third output end; the valve can be switched to two working states, among which, when the temperature control module is in the second working state, the output end of the valve is communicated with the second input end; when the temperature control module is in the third working state, the output end of the valve is communicated with the first input end; the temperature control system further includes: a temperature detection device for obtaining engine water temperature information and transmission oil temperature information; when the transmission oil temperature is greater than or equal to a third preset temperature, the temperature control module is in the third working state and is fully opened, and the first throttle valve increases the resistance of its branch to enter the transmission forced cooling mode; when the transmission oil temperature is less than a fourth preset temperature, the transmission forced cooling mode is exited and the transmission traditional cooling mode is entered; wherein, the third preset temperature is greater than the fourth preset temperature.

2. The temperature control system based on an automatic transmission according to claim 1, characterized in that, both the first throttle valve and the second throttle valve are solenoid valves; the valve is an electromagnetic directional valve.

3. The temperature control system based on an automatic transmission according to claim 1, characterized in that, the temperature control module includes a multi-way ball valve, and the multi-way ball valve is an electromagnetic directional valve.

4. The temperature control system based on an automatic transmission according to claim 1, characterized in that, when the engine water temperature is less than or equal to a first preset temperature, the temperature control module switches to the first working state; When the engine water temperature is greater than the first preset temperature and the transmission oil temperature is less than or equal to the second preset temperature, the temperature control module switches to the second working state, and the valve switches to the working state matching the second working state; When the transmission oil temperature is greater than the second preset temperature, the temperature control module switches to the third working state, and the valve switches to the working state matching the third working state.

5. The temperature control system based on an automatic transmission according to claim 1, characterized in that, the temperature control system further comprises: an expansion tank; The input end of the expansion tank is respectively connected to the output end of the engine and the output end of the radiator, and the output end of the expansion tank is connected to the input end of the water pump.

6. A method for operating a temperature control system based on an automatic transmission according to any one of claims 1 to 5, characterized in that, comprising the following steps: When the engine water temperature is less than or equal to the first preset temperature, the temperature control module switches to the first working state and enters the engine warm-up mode: the flow sequence of the coolant is water pump, engine, temperature control module, water pump; When the engine water temperature is greater than the first preset temperature and the transmission oil temperature is less than or equal to the second preset temperature, the temperature control module switches to the second working state, the valve switches to the working state matching the second working state, and enters the transmission warm-up mode: the flow sequence of the coolant is water pump, engine, temperature control module, heater core, valve, transmission heat exchanger, water pump; When the transmission oil temperature is greater than the second preset temperature, the temperature control module switches to the third working state, the valve switches to the working state matching the third working state, and enters the traditional transmission cooling mode: the flow sequence of the coolant is water pump, engine, temperature control module, radiator, valve, transmission heat exchanger, water pump; When the transmission oil temperature is greater than or equal to the third preset temperature, the temperature control module is in the third working state and fully open, and the first throttle valve increases the resistance of its branch to enter the transmission forced cooling mode. When the transmission oil temperature is less than the fourth preset temperature, it exits the transmission forced cooling mode and enters the traditional transmission cooling mode; wherein, the third preset temperature is greater than the fourth preset temperature, and the fourth preset temperature is greater than the second preset temperature.

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