CN112112951B - Cooling system of gearbox and automobile - Google Patents
Cooling system of gearbox and automobile Download PDFInfo
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- CN112112951B CN112112951B CN202010888049.0A CN202010888049A CN112112951B CN 112112951 B CN112112951 B CN 112112951B CN 202010888049 A CN202010888049 A CN 202010888049A CN 112112951 B CN112112951 B CN 112112951B
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- 238000001816 cooling Methods 0.000 title claims abstract description 92
- 239000000110 cooling liquid Substances 0.000 claims abstract description 98
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 230000000694 effects Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02034—Gearboxes combined or connected with electric machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
Abstract
The disclosure relates to a cooling system of a gearbox and an automobile, and belongs to the field of automobiles. The cavity of the gear box is filled with cooling liquid, and the driving motor is positioned in the gear box. The cooler is located outside the transmission cavity. One end of the first pipeline is positioned in the cooling liquid, and the other end of the first pipeline extends out of the cavity of the gearbox and is communicated with an input port of the cooler. One end of the second pipeline is positioned in the cooling liquid, and the other end of the second pipeline extends out of the cavity of the gearbox and is communicated with an output port of the cooler. The mechanical pump and the electric pump are located on the first pipeline or the second pipeline, and the mechanical pump is driven by a power source of the automobile. Wherein the mechanical pump and the electric pump are configured to drive the cooling liquid to flow when a vehicle speed of the vehicle is higher than a first speed; when the speed of the automobile is lower than a second speed, the electric pump drives the cooling liquid to flow; when the vehicle speed of the vehicle is lower than the first speed and higher than the second speed, the mechanical pump and the electric pump simultaneously drive the cooling liquid to flow. The first speed is greater than the second speed.
Description
Technical Field
The disclosure relates to the field of automobiles, in particular to a cooling system of a gearbox and an automobile.
Background
A transmission is a mechanism for changing the speed and torque of an engine, which can change the transmission ratio of an output shaft and an input shaft, thereby changing the speed of a vehicle, and is an important part of the vehicle.
For a hybrid electric vehicle, a driving motor is arranged in a gearbox and provides power to drive the vehicle to rotate, and when the driving motor works, the temperature of the driving motor is higher, so that the temperature of the gearbox is higher, and the normal operation of the gearbox is influenced.
Disclosure of Invention
The embodiment of the disclosure provides a cooling system of a gearbox and an automobile, and the cooling effect of the cooling system of the gearbox is improved. The technical scheme is as follows:
the utility model provides a cooling system of gearbox, the gearbox includes the gearbox cavity and is located driving motor in the gearbox cavity, the splendid attire has cooling liquid in the gearbox cavity, driving motor is located the cooling liquid top, cooling system of gearbox includes:
a cooler located outside the transmission cavity;
one end of the first pipeline is positioned in the cooling liquid, and the other end of the first pipeline extends out of the gearbox cavity and is communicated with an input port of the cooler;
one end of the second pipeline is positioned in the cooling liquid, and the other end of the second pipeline extends out of the gearbox cavity and is communicated with an output port of the cooler;
a mechanical pump on one of the first and second conduits, the mechanical pump being driven by a power source of an automobile;
an electric pump located on one of the first and second conduits and spaced from the mechanical pump;
wherein the mechanical pump and the electric pump are configured to drive the cooling liquid to flow when a vehicle speed of the automobile is higher than a first speed; when the speed of the automobile is lower than a second speed, the electric pump drives the cooling liquid to flow; when the vehicle speed of the automobile is lower than the first speed and higher than the second speed, the mechanical pump and the electric pump simultaneously drive the cooling liquid to flow; the first speed is greater than the second speed.
In one implementation of the disclosed embodiment, the first pipe and the second pipe each include:
the cooling pipeline is positioned in the gearbox cavity, at least part of the cooling pipeline is attached to the inner side wall of the gearbox cavity, and one end of the cooling pipeline is positioned in the cooling liquid;
one end of the conveying pipeline is communicated with the other end of the cooling pipeline;
the other end of the conveying pipeline of the first pipeline extends out of the gearbox cavity and is communicated with an input port of the cooler, and the other end of the conveying pipeline of the second pipeline extends out of the gearbox cavity and is communicated with an output port of the cooler.
In one implementation of the disclosed embodiment, the mechanical pump and the electric pump are both located on two of the transport pipes, respectively.
In one implementation of the embodiment of the present disclosure, the cooling system of the transmission further includes:
the fan is located outside the gearbox cavity, and an air outlet of the fan faces the cooler.
In one implementation of the embodiment of the present disclosure, the cooling system of the transmission further includes:
a first temperature sensor located within the gearbox cavity;
a second temperature sensor located on one of the first and second conduits and outside the transmission cavity;
a controller electrically connected to the driving motor, the electric pump, the first temperature sensor, the second temperature sensor, and the fan, respectively;
the controller is configured to control the fan to operate when the vehicle is in a first state, where the first state is: the temperature detected by the first temperature sensor is higher than a first temperature, and the temperature detected by the second temperature sensor is higher than a second temperature; if the automobile is in a second state, controlling the fan to stop working, wherein the second state is as follows: the temperature that first temperature sensor detected is less than first temperature, just the temperature that second temperature sensor detected is less than the second temperature, first temperature is greater than the second temperature.
In an implementation manner of the embodiment of the present disclosure, the controller is further configured to control the fan to operate when the vehicle is switched from the first state to a third state; when the automobile is converted from the second state to the third state, controlling the fan to stop working;
the third state is: the temperature that first temperature sensor detected is greater than first temperature and the temperature that second temperature sensor detected is less than the second temperature, perhaps the temperature that first temperature sensor detected is less than first temperature and the temperature that second temperature sensor detected is greater than the second temperature.
In an implementation manner of the embodiment of the present disclosure, the controller is further configured to control the electric pump to operate when a vehicle speed of the vehicle is equal to zero and if the vehicle is in a first operating state.
In an implementation manner of the embodiment of the present disclosure, the controller is further configured to control the electric pump to stop working after working for the first time if the vehicle is in the second working state when the vehicle speed of the vehicle is equal to zero.
In one implementation of an embodiment of the present disclosure, the first time is between 10 seconds and 30 seconds.
In another aspect, the present disclosure provides an automobile including the cooling system for a transmission according to any one of the above aspects.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
in the case that the driving motor works, more heat is generated, and the heat is dispersed in the cavity of the gearbox, so that the temperature of the gearbox is increased. The mechanical pump and the electric pump drive cooling liquid to flow in the first pipeline and the second pipeline, the cooling liquid exchanges heat with air in the gearbox while flowing in the first pipeline and the second pipeline, the temperature of the gearbox is reduced, the cooling liquid with the increased temperature flows into the cooler, the temperature of the cooling liquid is reduced, and then the cooling liquid flows into the first pipeline and the second pipeline. The cooling liquid circulates in the first pipeline and the second pipeline to exchange heat with air in the gearbox, and the cooling liquid circulates in the first pipeline and the second pipeline in such a way that the cooling liquid cools the gearbox.
Since the mechanical pump is driven by the power source of the automobile, when the automobile is also driven by the driving motor, the mechanical pump is driven by the driving motor. When the speed of the automobile is high, the rotating speed of the driving motor is high, namely the pressure provided by the mechanical pump is high; when the speed of the vehicle is low, the rotation speed of the driving motor is low, i.e. the pressure provided by the mechanical pump is small. When the speed of the automobile is low, the pressure provided by the mechanical pump cannot drive cooling liquid to flow in the first pipeline and the second pipeline, and at the moment, the electric pump works to drive the cooling liquid to flow in the first pipeline and the second pipeline, so that the cooling of the gearbox is realized; when the speed of the automobile is high, the pressure provided by the mechanical pump can drive cooling liquid to flow in the first pipeline and the second pipeline, and at the moment, the mechanical pump only needs to work to drive the cooling liquid to flow in the first pipeline and the second pipeline, so that the cooling of the gearbox is realized; when the speed of a motor vehicle is not high or low, the pressure provided by the mechanical pump can drive cooling liquid to flow in the first pipeline and the second pipeline, at the moment, the mechanical pump can drive the cooling liquid to flow in the first pipeline and the second pipeline, but effective cooling of the gearbox cannot be realized, the mechanical pump and the electric pump work simultaneously, the cooling liquid is driven to flow in the first pipeline and the second pipeline, and effective cooling of the gearbox is realized. The gearbox is effectively cooled through the cooperation of the mechanical pump and the electric pump, and the cooling effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a transmission provided in an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a cooler provided in an embodiment of the present disclosure;
FIG. 3 is a block diagram of a cooling system for a transmission provided by an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a transmission provided in an embodiment of the present disclosure. Referring to fig. 1, the gearbox includes a gearbox cavity 10 and a driving motor 20, a cooling liquid 101 is contained in the gearbox cavity 10, the driving motor 20 is used for driving the automobile to move, and the driving motor 20 is located in the gearbox cavity 10 and above the cooling liquid 101. The cooling system of the gearbox comprises a cooler 30, a first conduit 401, a second conduit 402, a mechanical pump 50 and an electric pump 60.
The cooler 30 is located outside the gearbox housing 10. One end of the first pipe 401 is located in the cooling liquid 101, and the other end of the first pipe 401 extends out of the transmission cavity 10 and is communicated with the input port of the cooler 30. One end of the second pipe 402 is located in the cooling liquid 101, and the other end of the second pipe 402 extends out of the transmission cavity 10 and is communicated with the output port of the cooler 30. The mechanical pump 50 is located on one of the first and second pipes 401 and 402, and the mechanical pump 50 is driven by the driving motor 20. The electric pump 60 is located on one of the first and second conduits 401 and 402 and is spaced apart from the mechanical pump 50. Wherein the mechanical pump 50 and the electric pump 60 are configured such that when the vehicle speed of the automobile is higher than a first speed, the mechanical pump 50 drives the cooling liquid 101 to flow; when the vehicle speed of the vehicle is lower than the second speed, the electric pump 60 drives the cooling liquid 101 to flow; when the vehicle speed of the automobile is lower than the first speed and higher than the second speed, the mechanical pump 50 and the electric pump 60 simultaneously drive the cooling liquid 101 to flow. The first speed is greater than the second speed. The cooling liquid 101 flows in the first pipe 401, the second pipe 402, and the cooler 30.
In the case that the driving motor works, more heat is generated, and the heat is dispersed in the cavity of the gearbox, so that the temperature of the gearbox is increased. The mechanical pump and the electric pump drive cooling liquid to flow in the first pipeline and the second pipeline, the cooling liquid exchanges heat with air in the gearbox while flowing in the first pipeline and the second pipeline, the temperature of the gearbox is reduced, the cooling liquid with the increased temperature flows into the cooler, the temperature of the cooling liquid is reduced, and then the cooling liquid flows into the first pipeline and the second pipeline. The cooling liquid circulates in the first pipeline and the second pipeline to exchange heat with air in the gearbox, and the cooling liquid circulates in the first pipeline and the second pipeline in such a way that the cooling liquid cools the gearbox.
Since the mechanical pump is driven by the power source of the automobile, when the automobile is driven by the driving motor, the mechanical pump is driven by the driving motor. When the speed of the automobile is high, the rotating speed of the driving motor is high, namely the pressure provided by the mechanical pump is high; when the speed of the vehicle is low, the rotation speed of the driving motor is low, i.e. the pressure provided by the mechanical pump is small. When the speed of the automobile is low, the pressure provided by the mechanical pump cannot drive cooling liquid to flow in the first pipeline and the second pipeline, and at the moment, the electric pump works to drive the cooling liquid to flow in the first pipeline and the second pipeline, so that the cooling of the gearbox is realized; when the speed of the automobile is high, the pressure provided by the mechanical pump can drive cooling liquid to flow in the first pipeline and the second pipeline, and at the moment, the mechanical pump only needs to work to drive the cooling liquid to flow in the first pipeline and the second pipeline, so that the cooling of the gearbox is realized; when the speed of a motor vehicle is not high or low, the pressure provided by the mechanical pump can drive cooling liquid to flow in the first pipeline and the second pipeline, at the moment, the mechanical pump can drive the cooling liquid to flow in the first pipeline and the second pipeline, but effective cooling of the gearbox cannot be realized, the mechanical pump and the electric pump work simultaneously, the cooling liquid is driven to flow in the first pipeline and the second pipeline, and effective cooling of the gearbox is realized. The gearbox is effectively cooled through the cooperation of the mechanical pump and the electric pump, and the cooling effect is improved.
In the embodiment of the present disclosure, the mechanical pump 50 is connected to a power source output shaft of the automobile, the output shaft drives the mechanical pump 50 to rotate, so that the mechanical pump provides pressure, when the automobile is driven by the driving motor 20, and when the speed of the automobile is low, the rotation speed of the driving motor 20 is low, the pressure provided by the mechanical pump 50 is low, and the cooling liquid 101 cannot be driven to flow in the first pipeline and the second pipeline, so that the cooling of the transmission cannot be realized. Meanwhile, the efficiency of the electric pump 60 is lower than the maximum efficiency of the mechanical pump, and when the speed of the automobile is high, the gearbox cannot be cooled by the single electric pump 60. The disclosed embodiment combines a mechanical pump 50 with an electric pump 60 to achieve efficient cooling of the transmission.
In the embodiment of the present disclosure, the power source of the vehicle may be a driving power supply or an engine, that is, the mechanical pump 50 may also be driven by the engine.
As shown in fig. 1, the driving motor 20 is located above the cooling liquid 101, and does not contact the cooling liquid 101, so as to avoid affecting the operation of the driving motor 20.
In the embodiment of the present disclosure, the driving motor 20 is located in the transmission cavity 10, when the driving motor 20 works, the conversion between the electrical energy and the mechanical energy occurs, and the loss of the mechanical energy generates heat, so that the temperature in the transmission cavity 10 is increased. The temperature at which the drive motor 20 operates is maintained above 100 degrees celsius (c).
In the embodiment of the present disclosure, the vehicle is driven by the driving motor 20, that is, the rotating speed of the driving motor 20 is high, the speed of the vehicle is high, the rotating speed of the driving motor is low, and the speed of the vehicle is low. I.e. the speed of the vehicle can be determined directly from the rotational speed of the drive motor 20. For example, the corresponding relationship between the vehicle speed and the rotation speed of the driving motor 20 is determined in advance, and then the real-time vehicle speed is correspondingly converted into the rotation speed of the driving motor 20.
In the disclosed embodiment, the first speed ranges between 10 kilometers per hour (km/h) and 20 kilometers per hour, for example, the first speed is 15 kilometers per hour. The second speed is greater than 20 kilometers per hour.
The gearbox provided by the embodiment of the disclosure can be a Hybrid Dedicated gearbox (DHT for short). The structure of the special gearbox for the hybrid power is tighter, the size of the gearbox can be reduced, and the automobile has more spaces for arranging other devices for improving the performance of the automobile.
In this disclosed embodiment, cooling liquid 101 is lubricating oil, and the cooling effect of lubricating oil is better, and at the in-process that carries out the heat exchange with the air, can reduce the temperature fast, makes the temperature of lubricating oil reduce, when flow into gearbox cavity 10 once more in, can carry out the heat exchange with the air in gearbox cavity 10 fast, reduces gearbox cavity 10's temperature, realizes the cooling to the gearbox.
In the disclosed embodiment, since the cooler 30 cools the lubricating oil, the cooler 30 may also be referred to as an oil cooler.
Referring again to fig. 1, the cooling system of the transmission further includes a fan 70, the fan 70 is located outside the transmission cavity 10, and an air outlet of the fan 70 faces the cooler 30.
In this embodiment, when the cooling liquid flows to the cooler 30, the fan 70 fans the cooler 30 to increase the temperature of the cooling liquid 101 in the cooler 30, thereby improving the cooling effect of the cooler 30.
Fig. 2 is a schematic structural diagram of a cooler provided in an embodiment of the present disclosure. Referring to fig. 2, the cooler 30 is a curved pipe, specifically, a serpentine pipe. The both ends of crooked pipeline communicate with first pipeline 401 and second pipeline 402 respectively, and cooling liquid 101 flows through crooked pipeline, and crooked pipeline is located outside gearbox cavity 10, and the outer temperature of gearbox cavity 10 is lower, and the area of contact of crooked pipeline and air is great, can improve the heat transfer effect, and cooling liquid 101 carries out the heat exchange with the outer air of gearbox cavity 10, makes the temperature reduction of cooling liquid 101, realizes the cooling to gearbox cavity 10.
As shown in fig. 1, the mechanical pump 50 is located on the second pipe 402, and the electric pump 60 is located on the first pipe 401. In other implementations, the mechanical pump 50 may be located on the first conduit 401 and the electric pump 60 on the second conduit 402, or both the mechanical pump 50 and the electric pump 60 may be located on the first conduit 401, or both the mechanical pump 50 and the electric pump 60 may be located on the second conduit 402.
Referring again to fig. 1, the first pipe 401 and the second pipe 402 each include: cooling ducts 403 and transport ducts 404. The cooling pipeline 403 is located in the transmission cavity 10, at least part of the cooling pipeline 403 is attached to the inner side wall of the transmission cavity 10, and one end of the cooling pipeline 403 is located in the cooling liquid 101. The transport pipe 404 communicates with the other ends of the two cooling pipes 403. The other end of the transportation pipeline 404 of the first pipeline 401 extends out of the gearbox cavity 10 and is communicated with the input port of the cooler 30, and the other end of the transportation pipeline 404 of the second pipeline 402 extends out of the gearbox cavity 10 and is communicated with the output port of the cooler 30. The cooling pipe 403 and the transport pipe 404 may be the same or different.
In this implementation, the cooling duct 403 is located within the transmission cavity 10, and exchanges heat with air in the transmission cavity 10, reducing the temperature in the transmission cavity 10. Because, at least part laminating of cooling duct 403 is on the inside wall of gearbox cavity 10, guarantees the stability of cooling duct 403 in gearbox cavity 10 on the one hand, and on the other hand can make the laminating of the inside wall of more cooling duct 403 and gearbox cavity 10 to increase the cooling effect. Meanwhile, the cooling liquid 101 in the cooling pipeline 403 is conveniently cooled by arranging the transportation pipeline 404 to communicate the cooling pipeline 403 with the cooler 30.
Meanwhile, a plurality of pairs of gear pairs, and a power shaft and a transmission shaft connected with the driving motor 20 are arranged in the gearbox cavity 10. The power shaft is used to output power for driving the motor 20. The gear pair is connected with the power shaft and used for adjusting the speed of the automobile. In the embodiment of the present disclosure, the cooling pipe 403 may pass through the space between the power shaft and the gear pair of the transmission cavity 10, so that the cooling pipe 403 does not occupy too much volume in the transmission cavity 10, and the volume of the transmission is reduced.
Referring again to fig. 1, the mechanical pump 50 is located on the cooling duct 403, i.e. the mechanical pump 50 is located in the gearbox cavity 10, facilitating connection with the drive shaft in the gearbox. The electric pump 60 is located on the transport pipe 404 and fixed on the outer wall of the gearbox, ensuring the stability of the electric pump 60. The mechanical pump 50 and the electric pump 60 are operated to increase the pressure of the cooling liquid in the transport pipe 404 to flow the cooling liquid.
In this implementation, arranging the electric pump 60 on the transport pipe 404, i.e. with the electric pump 60 outside the gearbox cavity 10, may reduce the volume of the gearbox cavity 10.
In other implementations, the electric pumps 60 may also be arranged to be both located on the cooling duct 403, i.e. the electric pumps 60 are located within the gearbox cavity 10.
FIG. 3 is a block diagram of a cooling system for a transmission provided by an embodiment of the present disclosure. Referring to fig. 3, the cooling system of the transmission further includes: a first temperature sensor 80, a second temperature sensor 90, and a controller 100. Wherein the first temperature sensor 80 is located inside the gearbox cavity 10 and the second temperature sensor 90 is located on one of the first and second ducts 401, 402 and outside the gearbox cavity 10. The controller 100 is electrically connected to the driving motor 20, the electric pump 60, the first temperature sensor 80, the second temperature sensor 90, and the fan 70, respectively.
The controller 100 is configured to control the fan 70 to operate when the vehicle is in a first state, where the first state is: the temperature detected by the first temperature sensor 80 is greater than the first temperature, and the temperature detected by the second temperature sensor 90 is greater than the second temperature; if the automobile is in the second state, the fan 70 is controlled to stop working, and the second state is as follows: the temperature detected by the first temperature sensor 80 is less than the first temperature, and the temperature detected by the second temperature sensor 90 is less than the second temperature, the first temperature being greater than the second temperature.
In this implementation, the first temperature sensor 80 detects the temperature of the air inside the gearbox cavity 10 and the second temperature sensor 90 detects the temperature of the cooling liquid 101 inside the first or second duct 401, 402. When the temperature detected by the first temperature sensor 80 is higher than the first temperature and the temperature detected by the second temperature sensor 90 is higher than the second temperature, the automobile is in the first state, the temperature in the gearbox cavity 10 is higher at the moment, the temperature of the cooling liquid 101 is also higher, the cooling effect is relatively poor at the moment, effective cooling can be realized, the cooling effect can be increased by controlling the fan 70 to work through the controller 100, and the situation that the temperature of the gearbox cavity 10 is too high and the performance of the automobile is influenced is avoided. When the temperature detected by the first temperature sensor 80 is lower than the first temperature and the temperature detected by the second temperature sensor 90 is lower than the second temperature, the automobile is in the second state, the temperature in the transmission cavity 10 is already reduced at this time, and the temperature of the cooling liquid 101 is also reduced, which indicates that the cooling effect can realize effective cooling, and the controller 100 controls the fan 70 to stop working, thereby avoiding increasing the energy consumption of the automobile.
As shown in fig. 1, the second temperature sensor 90 is located on the second pipe 402, and in other implementations, the second temperature sensor 90 may also be located on the first pipe 401.
In one implementation of the disclosed embodiment, the controller 100 is configured to control the fan 70 to operate when the vehicle is in the third state from the first state. When the vehicle is changed from the second state to the third state, the fan 70 is controlled to stop operating. The third state is: the temperature detected by the first temperature sensor 80 is greater than the first temperature and the temperature detected by the second temperature sensor 90 is less than the second temperature, or the temperature detected by the first temperature sensor 80 is less than the first temperature and the temperature detected by the second temperature sensor 90 is greater than the second temperature.
In this implementation, the first temperature sensor 80 and the second temperature sensor 90 perform temperature detection in real time, and when the temperature detected by the first temperature sensor 80 is greater than the first temperature and the temperature detected by the second temperature sensor 90 is less than the second temperature, or the temperature detected by the first temperature sensor 80 is less than the first temperature and the temperature detected by the second temperature sensor 90 is greater than the second temperature, the automobile is in a third working state, and at this time, only one of the temperature in the transmission cavity 10 and the temperature of the cooling liquid 101 meets the requirement, and the complete cooling effect is not achieved. If the previous state of the third state is the first state, the temperature detected by the first temperature sensor 80 is changed from high to low, or the temperature detected by the second temperature sensor 90 is changed from high to low, that is, the overall temperature is changed from high to low, and the fan 70 is operated to realize cooling. If the previous state of the third state is the second state, the temperature detected by the first temperature sensor 80 is changed from low to high, or the temperature detected by the second temperature sensor 90 is changed from low to high, that is, the overall temperature is changed from low to high, and it is not necessary to perform cooling quickly, and the fan 70 is not operated.
In an embodiment of the present disclosure, the first temperature is between 110 degrees celsius and 120 degrees celsius and the second temperature is between 70 degrees celsius and 90 degrees celsius.
Illustratively, the first temperature is 100 degrees celsius and the second temperature is 80 degrees celsius.
In the embodiment of the present disclosure, the Controller 100 is a Control Unit of a vehicle-mounted computer, and is configured to Control operation of an automobile, and the Controller 100 may include an automatic Transmission Control Unit (TCU), a Micro Control Unit (MCU), or a Hybrid Control Unit (HCU).
Wherein the automatic compartment control unit is electrically connected to the first temperature sensor 80, the second temperature sensor 90 and the fan 70. The micro control unit is electrically connected to the electric pump 60. The hybrid control unit is electrically connected to the driving motor 20. Meanwhile, the automatic box control unit, the micro control unit and the mixing control unit are electrically connected with each other.
The Controller 100 is electrically connected to the driving motor 20, the electric pump 60, the first temperature sensor 80, the second temperature sensor 90, and the fan 70 through a Controller Area Network (CAN) bus.
In the embodiment of the present disclosure, two driving motors may be disposed in the automobile, the temperatures of the two driving motors may be different, two first temperature sensors 80 are disposed in the transmission, the two first temperature sensors 80 are respectively located on the two driving motors, and respectively detect the temperatures of the two driving motors, and when the temperature of any one of the two driving motors exceeds the first temperature, it is determined that the temperature in the transmission cavity 10 is high.
In the disclosed embodiment, the cooling liquid 101 temperature is the most dominant sensed quantity. The purpose of the cooling system of the whole gearbox is to control the temperature of the cooling liquid 101 within a certain range, and the cooling can be realized when the temperature of the cooling liquid 101 is within a certain range (less than 80 ℃). For the hybrid power system, the participation of the driving motor is the main characteristic, and the temperature rise of the driving motor is faster than that of the cooling liquid 101 and is more influenced by the temperature. It is therefore necessary to monitor the temperature of the drive motor.
In the disclosed embodiment, the input signals of the controller 100 include a rotation speed signal of the driving motor (i.e., a vehicle speed signal), a temperature signal of the driving motor, and a temperature signal of the cooling liquid 101. The input signals to the controller 100 include a signal for controlling the operation of the fan and a signal for controlling the operation of the electric pump.
The controller 100 may control the fan to work by controlling the switch, or may control the fan to work by Pulse Width Modulation (PWM), so as to achieve accurate temperature control.
In an embodiment of the present disclosure, the cooling system of the transmission includes a plurality of operating modes, which are described below:
firstly, the speed of the automobile is higher than the first speed, the mechanical pump works, namely the automobile is in a high-speed running state:
1. if the temperature of the cooling liquid is greater than or equal to the second temperature and the temperature of the driving motor is greater than or equal to the first temperature, namely the automobile is in a first state, the fan starts to work;
2. if the temperature of the cooling liquid is lower than the second temperature and the temperature of the driving motor is lower than the first temperature, namely the automobile is in a second state, the fan stops working;
3. if the temperature of the cooling liquid is less than the second temperature and the temperature of the driving motor is greater than or equal to the first temperature, or the temperature of the cooling liquid is greater than or equal to the second temperature and the temperature of the driving motor is less than the first temperature, namely the automobile is in a third state, and when the automobile is converted from the first state to the third state, the fan is controlled to work. And when the automobile is converted from the second state to the third state, controlling the fan to stop working.
When the speed of the automobile is lower than the second speed and higher than 0, the mechanical pump does not work, and the electric pump works, namely, the automobile is in a low-speed running state:
1. the temperature of the cooling liquid is greater than or equal to the second temperature, and the temperature of the driving motor is greater than or equal to the first temperature; namely the automobile is in the first state, the fan starts to work;
2. the temperature of the cooling liquid is lower than the second temperature, and the temperature of the motor is lower than the first temperature, namely the automobile is in a second state, and the fan stops working;
3. if the temperature of the cooling liquid is less than the second temperature and the temperature of the driving motor is greater than or equal to the first temperature, or the temperature of the cooling liquid is greater than or equal to the second temperature and the temperature of the driving motor is less than the first temperature, namely the automobile is in a third state, and when the automobile is converted from the first state to the third state, the fan is controlled to work. And when the automobile is converted from the second state to the third state, controlling the fan to stop working.
And thirdly, when the speed of the automobile is higher than the second speed and lower than the first speed, the mechanical pump works, and when the electric pump is supplemented:
1. if the temperature of the cooling liquid is greater than or equal to the second temperature and the temperature of the driving motor is greater than or equal to the first temperature, namely the automobile is in a first state, the fan works, the electric pump works according to the requirement of the pressure of the pump oil, when the pressure provided by the mechanical pump is small, the electric pump works, and when the pressure provided by the mechanical pump is large, the electric pump does not work;
2. when the temperature of the cooling liquid is lower than the second temperature and the temperature of the motor is lower than the first temperature, namely the automobile is in a second state, the fan stops working, the electric pump works according to the requirement of the pressure of the pump oil, when the pressure provided by the mechanical pump is smaller, the electric pump works, and when the pressure provided by the mechanical pump is larger, the electric pump does not work;
3. if the temperature of the cooling liquid is lower than the second temperature and the temperature of the driving motor is higher than or equal to the first temperature, or the temperature of the cooling liquid is higher than or equal to the second temperature and the temperature of the driving motor is lower than the first temperature, namely the automobile is in the third state, and when the automobile is switched from the first state to the third state, the fan is controlled to work. When the automobile is converted into the third state from the second state, the fan is controlled to stop working, the electric pump works according to the requirement of the pressure of the pumping oil, when the pressure provided by the mechanical pump is small, the electric pump works, and when the pressure provided by the mechanical pump is large, the electric pump does not work.
And fourthly, when the speed of the automobile is 0, namely the automobile stops at the moment, and the mechanical pump does not work at the moment:
1. the temperature of the cooling liquid is greater than or equal to the second temperature, and the temperature of the driving motor is greater than or equal to the first temperature; namely, when the automobile is in a first state, the fan and the electric pump work;
2. the temperature of the cooling liquid is lower than the second temperature and the temperature of the motor is lower than the first temperature, namely the automobile is in a second state, the fan stops working, and the electric pump stops after working for a period of time;
considering that the temperature of the driving motor may not be timely reduced after the vehicle is stopped, the electric pump is delayed to be turned off, and heat dissipation is further performed.
3. If the temperature of the cooling liquid is less than the second temperature and the temperature of the driving motor is greater than or equal to the first temperature, or the temperature of the cooling liquid is greater than or equal to the second temperature and the temperature of the driving motor is less than the first temperature, namely the automobile is in a third state, and when the automobile is converted from the first state to the third state, the fan and the electric pump are controlled to work. And when the automobile is converted from the second state to the third state, the fan is controlled to stop working, and the electric pump works.
In the disclosed embodiment, the electric pump operates with a delay of between 10 seconds and 30 seconds.
Illustratively, the electric pump is delayed for 20 seconds.
The cooling system of the gearbox provided by the embodiment of the disclosure is not incorporated into the original automobile cooling system, the burden of the original cooling system can not be increased, and the cooling effect of the whole automobile can not be influenced. Meanwhile, the electric pump and the mechanical pump are matched, the redundancy of the oil pressure of a cooling system of the gearbox is increased, the availability of the oil pressure is ensured, the power source of the cooling system is stable, the cooling system of the whole gearbox is coordinated to work efficiently and reliably, and effective cooling is realized.
The cooling system of the gearbox provided by the embodiment of the disclosure comprises a hardware body and a software control strategy, and is applied to a hybrid power system provided with a mechanical pump and an electric pump. The cooling system is a subsystem of a hybrid transmission system. The cooling device is mainly used for cooling the special gearbox for the hybrid power. The cooling system can ensure that all working states of the special gearbox for the hybrid power are covered, and the special gearbox for the hybrid power is ensured to work within a reasonable and reliable temperature range.
The embodiment of the disclosure also provides an automobile comprising the cooling system of the gearbox.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (7)
1. The utility model provides a cooling system of gearbox, characterized in that, the gearbox includes gearbox cavity (10) and is located driving motor (20) in gearbox cavity (10), splendid attire has cooling liquid (101) in gearbox cavity (10), driving motor (20) are located cooling liquid (101) top, cooling system of gearbox includes:
a cooler (30) located outside the gearbox cavity (10);
a first pipeline (401), one end of which is positioned in the cooling liquid (101), and the other end of which extends out of the gearbox cavity (10) and is communicated with an input port of the cooler (30);
a second pipeline (402), one end of which is positioned in the cooling liquid (101), and the other end of which extends out of the gearbox cavity (10) and is communicated with an output port of the cooler (30);
a mechanical pump (50) located on one of the first conduit (401) and the second conduit (402), the mechanical pump (50) being driven by a power source of an automobile;
an electric pump (60) located on one of the first conduit (401) and the second conduit (402) and spaced from the mechanical pump (50);
wherein the mechanical pump (50) and the electric pump (60) are configured such that the mechanical pump (50) drives the cooling liquid (101) to flow when the vehicle speed of the vehicle is higher than a first speed; when the vehicle speed of the automobile is lower than a second speed, the electric pump (60) drives the cooling liquid (101) to flow; when the vehicle speed of the automobile is lower than the first speed and higher than the second speed, the mechanical pump (50) and the electric pump (60) simultaneously drive the cooling liquid (101) to flow; the first speed is greater than the second speed;
the cooling system of the transmission further includes:
a fan (70) located outside the gearbox cavity (10), an air outlet of the fan (70) facing the cooler (30);
a first temperature sensor (80) located within the gearbox cavity (10);
a second temperature sensor (90) located on one of the first conduit (401) and the second conduit (402) and outside the gearbox cavity (10);
a controller (100) electrically connected to the drive motor (20), the electric pump (60), the first temperature sensor (80), the second temperature sensor (90), and the fan (70), respectively;
wherein the controller (100) is configured to control the fan (70) to operate when the vehicle is in a first state, and the first state is: the temperature detected by the first temperature sensor (80) is greater than a first temperature, and the temperature detected by the second temperature sensor (90) is greater than a second temperature; when the automobile is in a second state, controlling the fan (70) to stop working, wherein the second state is as follows: the first temperature sensor (80) detects a temperature less than the first temperature and the second temperature sensor (90) detects a temperature less than the second temperature, the first temperature being greater than the second temperature;
the controller (100) is further used for controlling the fan (70) to work when the automobile is changed from the first state to the third state; when the automobile is changed from the second state to the third state, controlling the fan (70) to stop working;
the third state is: the temperature detected by the first temperature sensor (80) is greater than the first temperature and the temperature detected by the second temperature sensor (90) is less than the second temperature, or the temperature detected by the first temperature sensor (80) is less than the first temperature and the temperature detected by the second temperature sensor (90) is greater than the second temperature.
2. A cooling system of a gearbox according to claim 1, characterised in that the first duct (401) and the second duct (402) each comprise:
the cooling pipeline (403) is positioned in the gearbox cavity (10), at least part of the cooling pipeline (403) is attached to the inner side wall of the gearbox cavity (10), and one end of the cooling pipeline (403) is positioned in the cooling liquid (101);
a transport duct (404) having one end communicating with the other end of the cooling duct (403);
the other end of the conveying pipeline (404) of the first pipeline (401) extends out of the gearbox cavity (10) and is communicated with an input port of the cooler (30), and the other end of the conveying pipeline (404) of the second pipeline (402) extends out of the gearbox cavity (10) and is communicated with an output port of the cooler (30).
3. -cooling system of a gearbox according to claim 2, characterised in that said mechanical pump (50) and said electric pump (60) are located on two of said transport ducts (404), respectively.
4. The cooling system of a gearbox according to claim 1, wherein the controller (100) is further configured to control the electric pump (60) to operate if the vehicle is in the first operating state when the vehicle speed of the vehicle is equal to zero.
5. The cooling system of a transmission according to claim 1, wherein the controller (100) is further configured to control the electric pump (60) to operate for a first time and then stop operating if the vehicle is in the second operating state when the vehicle speed is equal to zero.
6. A cooling system for a gearbox according to claim 5, characterised in that the first time is between 10 and 30 seconds.
7. A motor vehicle, characterized in that it comprises a cooling system of a gearbox according to any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888049.0A CN112112951B (en) | 2020-08-28 | 2020-08-28 | Cooling system of gearbox and automobile |
| PCT/CN2021/115042 WO2022042687A1 (en) | 2020-08-28 | 2021-08-27 | Cooling system for gearbox, and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888049.0A CN112112951B (en) | 2020-08-28 | 2020-08-28 | Cooling system of gearbox and automobile |
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| CN112112951A CN112112951A (en) | 2020-12-22 |
| CN112112951B true CN112112951B (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010888049.0A Active CN112112951B (en) | 2020-08-28 | 2020-08-28 | Cooling system of gearbox and automobile |
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| WO (1) | WO2022042687A1 (en) |
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|---|---|---|---|---|
| CN112112951B (en) * | 2020-08-28 | 2022-02-01 | 奇瑞汽车股份有限公司 | Cooling system of gearbox and automobile |
| CN117072663B (en) * | 2023-10-18 | 2023-12-19 | 江苏中工高端装备研究院有限公司 | Efficient heat dissipation gear transmission case for fan |
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| CN202273744U (en) * | 2011-10-14 | 2012-06-13 | 中国第一汽车股份有限公司 | Auxiliary cooling structure of turbo supercharged engine |
| CN105805284A (en) * | 2014-12-31 | 2016-07-27 | 比亚迪股份有限公司 | Transmission lubricating system and method suitable for hybrid electric vehicle |
| CN205918874U (en) * | 2016-04-28 | 2017-02-01 | 中船重工(重庆)海装风电设备有限公司 | Gear box lubrication and cooling control system |
| JP2018099980A (en) * | 2016-12-20 | 2018-06-28 | トヨタ自動車株式会社 | Hybrid vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013129390A (en) * | 2011-12-22 | 2013-07-04 | Toyota Motor Corp | Vehicle control system |
| KR101601448B1 (en) * | 2014-07-04 | 2016-03-22 | 현대자동차주식회사 | Drive control method and system for electric oil pump |
| CN112112951B (en) * | 2020-08-28 | 2022-02-01 | 奇瑞汽车股份有限公司 | Cooling system of gearbox and automobile |
-
2020
- 2020-08-28 CN CN202010888049.0A patent/CN112112951B/en active Active
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2021
- 2021-08-27 WO PCT/CN2021/115042 patent/WO2022042687A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202273744U (en) * | 2011-10-14 | 2012-06-13 | 中国第一汽车股份有限公司 | Auxiliary cooling structure of turbo supercharged engine |
| CN105805284A (en) * | 2014-12-31 | 2016-07-27 | 比亚迪股份有限公司 | Transmission lubricating system and method suitable for hybrid electric vehicle |
| CN205918874U (en) * | 2016-04-28 | 2017-02-01 | 中船重工(重庆)海装风电设备有限公司 | Gear box lubrication and cooling control system |
| JP2018099980A (en) * | 2016-12-20 | 2018-06-28 | トヨタ自動車株式会社 | Hybrid vehicle |
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| WO2022042687A1 (en) | 2022-03-03 |
| CN112112951A (en) | 2020-12-22 |
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