CN115111042A - Cooling system of vehicle, control method of cooling system of vehicle, and vehicle - Google Patents
Cooling system of vehicle, control method of cooling system of vehicle, and vehicle Download PDFInfo
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- CN115111042A CN115111042A CN202210030947.1A CN202210030947A CN115111042A CN 115111042 A CN115111042 A CN 115111042A CN 202210030947 A CN202210030947 A CN 202210030947A CN 115111042 A CN115111042 A CN 115111042A
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- 238000001816 cooling Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 191
- 230000005540 biological transmission Effects 0.000 claims abstract description 161
- 230000017525 heat dissipation Effects 0.000 claims description 23
- 239000002826 coolant Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/04—Arrangements of liquid pipes or hoses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention discloses a cooling system of a vehicle, a control method of the cooling system of the vehicle and the vehicle, wherein the cooling system of a transmission comprises: a transmission cooling system, an engine cooling system and a motor cooling system; the transmission cooling system, the engine cooling system and the motor cooling system are all connected with a vehicle controller; the transmission cooling system includes: the system comprises a first radiator, a first heat exchange pipe, a transmission water pump, a transmission oil cooler, a first three-way valve and a second heat exchange pipe; the two ends of the first heat exchange tube are respectively connected with the first radiator to form a transmission cooling circulation loop, a transmission water pump and a transmission oil cooler are connected in series with the first heat exchange tube, and the transmission water pump is positioned between the transmission oil cooler and the first radiator; according to the cooling system of the vehicle, the transmission, the engine and the motor can be radiated, and the transmission, the engine and the motor are further ensured to be in the optimal working state.
Description
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a cooling system of a vehicle, a control method of the cooling system of the vehicle, and a vehicle.
Background
In the related art, the heat dissipation effect of the oil cooler of the transmission is poor; meanwhile, the control strategy of the heat dissipation system is simple, and the optimal working state of the transmission and the engine cannot be guaranteed.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a cooling system of a vehicle, which can dissipate heat of a transmission, an engine and a motor so as to ensure that the transmission, the engine and the motor are in an optimal working state.
The invention also provides a control method of the cooling system of the vehicle
The invention also provides a vehicle applying the control method of the cooling system of the vehicle.
A cooling system of a vehicle according to a first aspect of the invention includes: a transmission cooling system, an engine cooling system and a motor cooling system; the transmission cooling system, the engine cooling system and the motor cooling system are all connected with a vehicle controller; the transmission cooling system includes: the system comprises a first radiator, a first heat exchange pipe, a transmission water pump, a transmission oil cooler and a first three-way valve; the two ends of the first heat exchange pipe are respectively connected with the first radiator to form a transmission cooling circulation loop, the transmission water pump and the transmission oil cooler are connected in series with the first heat exchange pipe, and the transmission water pump is positioned between the transmission oil cooler and the first radiator; the first three-way valve is positioned between the transmission oil cooler and the first radiator and is connected to the first heat exchange pipe in series through a first interface of the first three-way valve and a third interface of the first three-way valve; and one end of the second heat exchange tube is connected with the second interface of the first three-way valve, and the other end of the second heat exchange tube is connected with the first radiator.
According to the cooling system of the vehicle, the transmission cooling system, the engine cooling system and the motor cooling system are arranged, so that the transmission, the engine and the motor are cooled, and the transmission, the engine and the motor are further ensured to be in the optimal working state.
In some embodiments, the motor cooling system includes: the second radiator, the motor water pump, the first motor, the second motor and the second three-way valve; one end of the second radiator is connected with the motor water pump through a pipeline, and the other end of the second radiator is respectively communicated with the cooler of the first motor and the cooler of the second motor through pipelines; the motor water pump is connected with a first interface of the second three-way valve through a pipeline; a third interface of the second three-way valve is communicated with a cooler of the first motor through a pipeline; and a second interface of the second three-way valve is communicated with a cooler of the second motor through a pipeline.
In some embodiments, the first heat sink is a high temperature heat sink and the second heat sink is a low temperature heat sink; both ends of the engine cooling system are communicated with the second radiator to form the engine low-temperature cooling system; one end of the engine heat dissipation system is communicated with the first heat exchange tube, and the other end of the engine heat dissipation system is communicated with the second heat exchange tube, so that the high-temperature heat dissipation system of the engine is formed.
A control method of a cooling system of a vehicle according to a second aspect of the invention, the cooling system of a vehicle being the cooling system of the vehicle described above, includes: acquiring a first temperature and a second temperature of the vehicle, and judging whether the first temperature meets a first preset temperature and whether the second temperature meets a second preset temperature, wherein the first temperature comprises a transmission oil temperature and an engine water temperature, and the second temperature comprises a first motor temperature and a second motor temperature; if the first temperature meets a first preset temperature and the second temperature does not meet a second preset temperature, adjusting the duty ratio of the transmission water pump to a first preset duty ratio, and communicating a first interface of the first three-way valve with a preset interface of the first three-way valve; and if the first temperature does not meet the first preset temperature and the second temperature meets the second preset temperature, adjusting the duty ratio of the motor water pump to the second preset duty ratio, and communicating the first interface of the second three-way valve with the preset interface of the second three-way valve.
According to the control method of the cooling system of the vehicle, the transmission, the engine and the motor are radiated under the condition that the temperatures of the transmission, the engine and the motor are overhigh, and the transmission, the engine and the motor are further ensured to be in the optimal working state.
In some embodiments, the control method further includes: if the first temperature meets the first preset temperature and the second temperature meets the second preset temperature, the duty ratio of the transmission water pump is adjusted to the first preset duty ratio, the first interface of the first three-way valve is communicated with the preset interface, and/or the duty ratio of the motor water pump is adjusted to the second preset duty ratio, and the first interface of the second three-way valve is communicated with the preset interface.
In some embodiments, if the first temperature satisfies a first preset temperature and the second temperature does not satisfy a second preset temperature, adjusting the duty ratio of the transmission water pump to the first preset duty ratio, and communicating the first port of the first three-way valve with a preset port includes: when the transmission oil temperature meets a first preset oil temperature and the engine water temperature meets a first preset water temperature, and the second temperature does not meet a preset temperature, adjusting the duty ratio of the transmission water pump to a third preset duty ratio, and connecting a first interface of the first three-way valve with a second interface of the first three-way valve; or when the transmission oil temperature meets a second preset oil temperature and the engine water temperature meets a second preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a fourth preset duty ratio, and the first interface of the first three-way valve and the third interface of the first three-way valve are connected; or when the transmission oil temperature meets a third preset oil temperature and the engine water temperature meets a third preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a fifth preset duty ratio, and the first interface of the first three-way valve and the third interface of the first three-way valve are connected.
In some embodiments, the vehicle controller records a fault code and controls the transmission water pump to stall when the first port of the first three-way valve is in communication with the third port of the first three-way valve and the second port of the first three-way valve is not closed.
In some embodiments, if the first temperature satisfies a first preset temperature and the second temperature does not satisfy a second preset temperature, adjusting the duty ratio of the transmission water pump to the first preset duty ratio, and communicating the first port of the first three-way valve with a preset port includes: and when the transmission oil temperature meets a fourth preset oil temperature, the engine water temperature meets a fourth preset water temperature, and a difference value between the fourth preset water temperature and the fourth preset oil temperature is greater than a preset value, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a sixth preset duty ratio, and the first interface of the first three-way valve and the second interface of the first three-way valve are connected.
In some embodiments, if the first temperature does not satisfy the first preset temperature and the second temperature satisfies the second preset temperature, adjusting the duty ratio of the motor-driven water pump to a second preset duty ratio, and communicating the first port of the second three-way valve with the preset port of the second three-way valve includes: if the first temperature does not meet the first preset temperature, and the first motor temperature meets the first preset motor temperature and the second motor temperature does not meet the second preset motor temperature, adjusting the duty ratio of the motor water pump to a seventh preset duty ratio, and communicating the first interface of the second three-way valve with the third interface of the second three-way valve; or if the first temperature does not meet the first preset temperature, and the first motor temperature does not meet the first preset motor temperature and the second motor temperature meets the second preset motor temperature, adjusting the duty ratio of the motor water pump to an eighth preset duty ratio, and communicating the first interface of the second three-way valve with the second interface of the second three-way valve.
In some embodiments, if the first temperature does not satisfy the first preset temperature, and the first motor temperature satisfies the first preset motor temperature and the second motor temperature satisfies the second preset motor temperature, the duty ratio of the motor-driven water pump is adjusted to a ninth preset duty ratio, and the first port of the second three-way valve is respectively communicated with the second port of the second three-way valve and the third port of the second three-way valve.
In some embodiments, a duty ratio signal request value of the motor water pump is calculated according to the temperature value of the first motor, and whether the duty ratio signal request value is within a preset request range is determined; if the duty ratio signal request value is within a preset request range, selecting the duty ratio of the motor water pump corresponding to the preset request range; the duty cycle of the motor water pump comprises the seventh preset duty cycle, the eighth preset duty cycle or the ninth preset duty cycle.
In some embodiments, the control method further comprises: acquiring a first motor running state, and determining whether the first motor is in fault according to the first motor running state; when the first motor fails, controlling the duty ratio of a cooling fan of the vehicle and the duty ratio of a water pump of the motor to operate at a tenth preset duty ratio, and determining the failure level of the first motor; and when the first motor fault level is greater than a preset fault level, controlling the duty ratio of the motor water pump to operate at an eleventh preset duty ratio.
According to the vehicle of the third aspect of the invention, the control method of the cooling system of the vehicle according to the second aspect of the invention is applied.
According to the vehicle of the invention, by applying the control method of the cooling system of the vehicle of the second aspect described above, the overall performance of the vehicle is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic illustration of a cooling system of a vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a motor cooling system in a cooling system of a vehicle according to an embodiment of the present invention.
Reference numerals:
100. a cooling system of the vehicle;
111. a first heat sink; 112. a first heat exchange tube; 113. a transmission water pump; 114. a transmission oil cooler; 115. a first three-way valve; 115a, a first port of a first three-way valve; 115b, a second port of the first three-way valve; 115c, a third port of the first three-way valve; 116. a second heat exchange tube; 117. an engine; 118. an engine water pump; 119. a turbocharger; 120. exhaust gas recirculation EGR; 121. a four-way valve; 122. an oil cooler; 123. a transmission;
131. a second heat sink; 133. a motor water pump; 134. a first motor; 135. a vehicle control unit; 136. an autonomous driving range controller; 137. an onboard controller; 138. a second motor; 139. a second three-way valve; 139a, a first port of a second three-way valve; 139b, a second port of the second three-way valve; 139c, a third port of the second three-way valve; 140. a water temperature sensor; 141. a pressure-bearing water overflow tank.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
A cooling system 100 of a vehicle according to an embodiment of a first aspect of the invention is described below with reference to fig. 1 to 2.
As shown in fig. 1, a cooling system 100, a transmission cooling system, an engine heat dissipation system, and a motor cooling system of a vehicle according to an embodiment of a first aspect of the invention; the transmission cooling system, the engine cooling system and the motor cooling system are all connected with a vehicle controller; therefore, heat dissipation of the transmission 123, the engine 117 and the motor is achieved through the transmission cooling system, the engine heat dissipation system and the motor cooling system, and normal operation of the transmission 123, the engine 117 and the motor is guaranteed.
The transmission cooling system may include a first radiator 111, a first heat exchanging pipe 112 (for example, a pipe indicated by a dotted arrow in fig. 1), a transmission water pump 113, a transmission oil cooler 114, a first three-way valve 115, and a second heat exchanging pipe 116 (for example, a pipe indicated by a solid arrow in fig. 1); two ends of the first heat exchange pipe 112 are respectively connected with the first radiator 111 to form a transmission cooling circulation loop, a transmission water pump 113 and a transmission oil cooler 114 are connected in series with the first heat exchange pipe 112, and the transmission water pump 113 is positioned between the transmission oil cooler 114 and the first radiator 111; from this, transmission water pump 113 and transmission oil cooler 114 are through establishing ties with first radiator 111 to reduce the temperature of coolant in transmission water pump 113 and the transmission oil cooler 114, and then better cool down the heat dissipation to derailleur 123, prevent that derailleur 123's operating temperature is too high, guarantee that derailleur 123 can operate under the most suitable temperature.
The first three-way valve 115 is positioned between the transmission oil cooler 114 and the first radiator 111, and the first three-way valve 115 is connected in series to the first heat exchange pipe 112 through a first port 115a of the first three-way valve and a third port 115c of the first three-way valve; one end of the second heat exchanging pipe 116 is connected to the second port 115b of the first three-way valve, and the other end is connected to the first radiator 111. Thus, the switching between the first heat exchanging pipe 112 and the second heat exchanging pipe 116 is realized by providing the first three-way valve 115, and the two pipes of the transmission cooling system are switched.
According to the cooling system 100 of the vehicle of the present invention, the transmission cooling system, the engine cooling system and the motor cooling system are provided to dissipate heat of the transmission 123, the engine 117 and the motor, thereby ensuring that the transmission 123, the engine 117 and the motor are in the optimal operating state.
In one embodiment of the present invention, referring to fig. 2, the motor cooling system may include a second radiator 131, a motor water pump 133, a first motor 134, a second motor 138, and a second three-way valve 139; one end of the second radiator 131 is connected with the motor water pump 133 through a pipeline, and the other end of the second radiator is respectively communicated with a cooler of the first motor 134 and a cooler of the second motor 138 through pipelines; from this, through establishing ties motor water pump 133 with second radiator 131, reduce the temperature of coolant liquid among the motor water pump 133, and then reduce the temperature of the coolant liquid that flows into first motor 134 and second motor 138, realize the better cooling heat dissipation to first motor 134 and second motor 138, the temperature is too high when avoiding first motor 134 and second motor 138 operation, guarantees that first motor 134 and second motor 138 can operate under the most suitable temperature.
The motor water pump 133 is connected with a first interface 139a of the second three-way valve through a pipeline; a third port 139c of the second three-way valve is communicated with the cooler of the first motor 134 through a pipeline; the second port 139b of the second three-way valve is communicated with the cooler of the second motor 138 through a pipe. From this, realize dispelling the heat to first motor 134 and second motor 138 respectively through setting up second three-way valve 139, and then motor cooling system can be more accurate realization to the heat dissipation of first motor 134 and second motor 138.
In one embodiment of the present invention, the first heat sink 111 is a high temperature heat sink, and the second heat sink 131 is a low temperature heat sink; the water of the low-temperature radiator enters through the motor water nozzle, flows out of the motor water nozzle after winding the motor water jacket for a circle, and reduces the heat of the motor; the water from the high temperature radiator flows into the water inlet of transmission oil cooler 114 and reduces the temperature of the transmission oil through transmission oil cooler 114.
Specifically, both ends of the engine cooling system are communicated with the second radiator 131 to form an engine low-temperature cooling system; one end of the engine heat dissipation system is communicated with the first heat exchange pipe 112, and the other end is communicated with the second heat exchange pipe 116, so as to form the high-temperature heat dissipation system of the engine. Therefore, the engine heat dissipation system can better dissipate the heat of the engine 117 by connecting the first heat exchange pipe 112 and the second heat exchange pipe 116.
For example, the coolant flowing out from the second heat exchanging pipe 116 flows through the engine 117 to cool the engine 117, the coolant flowing through the engine 117 flows through the first heat exchanging pipe 112 again, and the coolant is delivered to the first radiator 111 by the first heat exchanging pipe 112, thereby constituting a high-temperature heat radiating system for the engine, and the operating temperature of the engine 117 is reduced by the coolant flowing through the first heat exchanging pipe 112 and the second heat exchanging pipe 116, so as to avoid the operating temperature of the engine 117 from being too high.
For another example, the coolant flowing out of the second radiator 131 flows through the engine 117 to radiate heat from the engine 117, and is then sent to the second radiator 131 through a pipeline, thereby forming an engine low-temperature radiation system, and the engine 117 and the second radiator 131 are connected in series, so that the temperature of the coolant flowing through the engine 117 is lowered, and the operating temperature of the engine 117 is lowered, and the engine 117 is set at the optimum operating temperature.
Further, referring to fig. 1, the cooling system 100 of the vehicle may further include: engine water pump 118, turbocharger 119, EGR120, four-way valve 121, and oil cooler 122.
Further, referring to fig. 2, the cooling system 100 of the vehicle may further include: autopilot domain controller 136, onboard controller 137, second three-way valve 139, water temperature sensor 140, and pressure-bearing spill tank 141.
A control method of a cooling system 100 of a vehicle according to an embodiment of a second aspect of the invention is described below with reference to fig. 1 to 2.
In one embodiment of the present invention, a control method includes: acquiring a first temperature and a second temperature of a vehicle, and judging whether the first temperature meets a first preset temperature and whether the second temperature meets a second preset temperature, wherein the first temperature comprises a transmission oil temperature and an engine water temperature, and the second temperature comprises a first motor temperature and a second motor temperature; therefore, the working states of the transmission 123, the engine 117 and the motor are determined according to the transmission oil temperature, the engine water temperature, the first motor temperature and the second motor temperature, and the transmission 123, the engine 117 and the motor can be radiated more accurately and timely.
Further, if the first temperature meets a first preset temperature and the second temperature does not meet a second preset temperature, the duty ratio of the transmission water pump 113 is adjusted to the first preset duty ratio, and the first interface 115a of the first three-way valve is communicated with the preset interface of the first three-way valve 115; if the first temperature does not satisfy the first preset temperature and the second temperature satisfies the second preset temperature, the duty ratio of the motor water pump 133 is adjusted to a second preset duty ratio, and the first port 139a of the second three-way valve is communicated with the preset port of the second three-way valve 139.
According to the control method of the cooling system 100 of the vehicle, heat dissipation of the transmission 123, the engine 117 and the motor is realized under the condition that the temperature of the transmission 123, the engine 117 and the motor is too high, and therefore the transmission 123, the engine 117 and the motor are ensured to be in the optimal working state.
In an embodiment of the present invention, the control method may further include: if the first temperature meets the first preset temperature and the second temperature meets the second preset temperature, the duty ratio of the transmission water pump 113 is adjusted to a first preset duty ratio, the first interface 115a of the first three-way valve is communicated with the preset interface, and/or the duty ratio of the motor water pump 133 is adjusted to a second preset duty ratio, and the first interface 139a of the second three-way valve is communicated with the preset interface.
That is to say, when the transmission oil temperature and the engine water temperature satisfy the first preset temperature and the first motor temperature and the second motor temperature also satisfy the second preset temperature, the duty ratio of the transmission water pump 113 may be adjusted to the first preset duty ratio, the duty ratio of the motor water pump 133 may be adjusted to the second preset duty ratio, and the transmission water pump 113 may be adjusted to the first preset duty ratio and the motor water pump 133 may be adjusted to the second preset duty ratio at the same time. Therefore, heat dissipation of the transmission 123 and the motor can be completed according to the actual conditions of the transmission 123 and the motor.
In an embodiment of the present invention, if the first temperature satisfies the first preset temperature and the second temperature does not satisfy the second preset temperature, adjusting the duty ratio of the transmission water pump 113 to the first preset duty ratio, and communicating the first port 115a of the first three-way valve with the preset port includes:
when the transmission oil temperature meets the first preset oil temperature and the engine water temperature meets the first preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump 113 is adjusted to a third preset duty ratio, and the first interface 115a of the first three-way valve is communicated with the second interface 115b of the first three-way valve.
For example, in the process of increasing the oil temperature of the transmission, the oil temperature of the transmission is less than 80 ℃, the water temperature of the engine is less than 86 ℃, the duty ratio of the transmission water pump 113 is adjusted to 10%, and the first interface 115a of the first three-way valve is communicated with the second interface 115b of the first three-way valve; in the process of the oil temperature reduction of the transmission, the oil temperature of the transmission is less than 75 ℃, the water temperature of the engine is less than 86 ℃, the duty ratio of the transmission water pump 113 is adjusted to 10%, and the first interface 115a of the first three-way valve is communicated with the second interface 115b of the first three-way valve.
When the transmission oil temperature and the engine water temperature meet a second preset oil temperature and a second preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump 113 is adjusted to a fourth preset duty ratio, and the first interface 115a of the first three-way valve is communicated with the third interface 115c of the first three-way valve.
For example, in the process of increasing the oil temperature of the transmission, the oil temperature of the transmission is greater than or equal to 80 ℃, the water temperature of the engine is less than 86 ℃, the duty ratio of the transmission water pump 113 is adjusted to 50%, and the first interface 115a of the first three-way valve is communicated with the third interface 115c of the first three-way valve; in the process of the oil temperature reduction of the transmission, the oil temperature of the transmission is greater than or equal to 75 ℃, the water temperature of the engine is less than 86 ℃, the duty ratio of the transmission water pump 113 is adjusted to 50%, and the first connector 115a of the first three-way valve is communicated with the third connector 115c of the first three-way valve.
When the transmission oil temperature and the engine water temperature meet the third preset oil temperature and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump 113 is adjusted to a fifth preset duty ratio, and the first interface 115a of the first three-way valve is communicated with the third interface 115c of the first three-way valve.
For example, in the process of increasing the oil temperature of the transmission, the oil temperature of the transmission is greater than or equal to 75 ℃, the water temperature of the engine is greater than or equal to 86 ℃, wherein the oil temperature of the transmission is less than 100 ℃, the duty ratio of the water pump 113 of the transmission is adjusted to 50%, the oil temperature of the transmission is greater than or equal to 100 ℃, the duty ratio of the water pump 113 of the transmission is adjusted to 90%, and the first interface 115a of the first three-way valve is communicated with the second interface 115b of the first three-way valve; in the process of the drop of the oil temperature of the transmission, the oil temperature of the transmission is greater than or equal to 75 ℃, the water temperature of the engine is greater than or equal to 86 ℃, wherein the oil temperature of the transmission is less than 100 ℃, the duty ratio of a water pump 113 of the transmission is adjusted to 50%, the oil temperature of the transmission is greater than or equal to 100 ℃, and a first interface 115a of a first three-way valve is communicated with a second interface 115b of the first three-way valve.
Therefore, the transmission water pump 113 and the first interface 115a of the first three-way valve are controlled to be communicated with one of the second interface 115b of the first three-way valve and the third interface 115c of the first three-way valve through the transmission oil temperature and the engine water temperature, and a better heat dissipation effect is achieved on the transmission 123 and the engine 117.
In one embodiment of the present invention, when the first port 115a of the first three-way valve is in communication with the third port 115c of the first three-way valve and the second port 115b of the first three-way valve is not closed, the vehicle controller records a fault code and controls the transmission water pump 113 to stall.
Specifically, when the transmission oil temperature is greater than or equal to 80 ℃ and the engine water temperature is less than 86 ℃, the first interface 115a of the first three-way valve is communicated with the third interface 115c of the first three-way valve, and the second interface 115b of the first three-way valve is not closed, the vehicle controller records a fault code and controls the transmission water pump 113 to stop rotating, and under the condition, the transmission oil temperature reaches the temperature limit, the instrument displays the transmission fault, and the character is used for reminding that the transmission is overheated and requires safe stop.
In an embodiment of the present invention, if the first temperature satisfies the first preset temperature and the second temperature does not satisfy the second preset temperature, adjusting the duty ratio of the transmission water pump 113 to the first preset duty ratio, and communicating the first port 115a of the first three-way valve with the preset port includes:
when the transmission oil temperature meets a fourth preset oil temperature, the engine water temperature meets a fourth preset water temperature, and a difference value between the fourth preset water temperature and the fourth preset oil temperature is greater than a preset value, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump 113 is adjusted to a sixth preset duty ratio, and the first interface 115a of the first three-way valve is communicated with the second interface 115b of the first three-way valve.
For example, when the transmission oil temperature is less than 80 ℃, the engine water temperature is greater than 86 ℃, and the difference between the engine water temperature and the transmission oil temperature is greater than 20 ℃, the duty ratio of the transmission water pump 113 is adjusted to 50%, and the first port 115a of the first three-way valve is communicated with the second port 115b of the first three-way valve.
Further, when the water temperature of the engine is less than or equal to 86 ℃, the oil temperature of the transmission is greater than or equal to 80 ℃, and the difference value between the water temperature of the engine and the oil temperature of the transmission is less than 20 ℃, the duty ratio of the water pump 113 of the transmission is adjusted to 50%, and the first port 115a of the first three-way valve is communicated with the third port 115c of the first three-way valve.
In an embodiment of the present invention, if the first temperature does not satisfy the first preset temperature and the second temperature satisfies the second preset temperature, adjusting the duty ratio of the motor-driven water pump 133 to a second preset duty ratio, and communicating the first interface 139a of the second three-way valve with the preset interface of the second three-way valve 139 includes:
if the first temperature does not meet the first preset temperature, and the first motor temperature meets the first preset motor temperature and the second motor temperature does not meet the second preset motor temperature, the duty ratio of the motor water pump 133 is adjusted to a seventh preset duty ratio, and the first interface 139a of the second three-way valve is communicated with the third interface 139c of the second three-way valve; and then the coolant in the motor water pump 133 flows through the first motor 134 through the first port 139a of the second three-way valve and the third port 139b of the second three-way valve, so as to dissipate heat of the first motor 134.
If the first temperature does not satisfy the first preset temperature, and the first motor temperature does not satisfy the first preset motor temperature and the second motor temperature satisfies the second preset motor temperature, the duty ratio of the motor water pump 133 is adjusted to the eighth preset duty ratio, and the first port 139a of the second three-way valve is communicated with the second port 139b of the second three-way valve. And then the coolant in the motor water pump 133 flows through the second motor 138 through the first port 139a of the second three-way valve and the second port 139b of the second three-way valve, so as to dissipate heat of the second motor 138.
In an embodiment of the present invention, if the first temperature does not satisfy the first preset temperature, and the first motor temperature satisfies the first preset motor temperature and the second motor temperature satisfies the second preset motor temperature, the duty ratio of the motor water pump 133 is adjusted to a ninth preset duty ratio, the first interface 139a of the second three-way valve is respectively communicated with the second interface 139b of the second three-way valve and the third interface 139c of the second three-way valve, and then the coolant in the motor water pump 133 flows to the second interface 139b of the second three-way valve and the third interface 139c of the second three-way valve through the first interface 139a of the second three-way valve, so as to achieve simultaneous heat dissipation for the first motor 134 and the second motor 138, and further achieve better heat dissipation for the motor cooling system.
In one embodiment of the present invention, a duty ratio signal request value of the motor water pump 133 is calculated according to a temperature value of the first motor 134, and it is determined whether the duty ratio signal request value is within a preset request range; if the duty ratio signal request value is within the preset request range, selecting the duty ratio of the motor water pump 133 corresponding to the preset request range; the duty cycle of the motor water pump 133 includes a seventh preset duty cycle, an eighth preset duty cycle, or a ninth preset duty cycle. The duty ratio signal request of the motor water pump 133 is mainly determined according to the temperature value of the first motor 134, so that the first motor 134 can be more efficiently cooled in real time, and the optimal working state of the first motor 134 is ensured.
For example, when the duty cycle signal request of the motor water pump 133 is 20% or less, the duty cycle of the motor water pump 133 is 20%; when the duty cycle signal request of the motor water pump 133 is 20% -30%, the duty cycle of the motor water pump 133 is 60%; when the duty ratio signal request of the motor water pump 133 is 30% -40%, the duty ratio of the motor water pump 133 is 80%; when the duty cycle signal request of the motor water pump 133 is 40% -50%, the duty cycle of the motor water pump 133 is 90%; when the duty ratio signal request of the motor water pump 133 is greater than 50%, the duty ratio of the motor water pump 133 is 93%, and then the duty ratio of the motor water pump 133 is controlled according to different duty ratio signal requests, so that the first motor 134 is cooled more efficiently in real time, and the optimal working state of the first motor 134 is ensured.
In one embodiment of the present invention, the control method further includes: acquiring the running state of the first motor 134, and determining whether the first motor 134 fails according to the running state of the first motor 134;
when the first motor 134 fails, controlling the duty ratio of a cooling fan and a motor water pump 133 of the vehicle to operate at a tenth preset duty ratio, and determining the failure level of the first motor 134;
for example, when the first motor 134 is locked, the cooling fan and the motor water pump 133 are controlled to operate at the maximum duty ratio until the locked failure is released.
And when the fault level of the first motor 134 is greater than the preset fault level, controlling the duty ratio of the motor water pump 133 to operate at an eleventh preset duty ratio.
Further, in a specific implementation process, the fault level of the vehicle is divided into three levels, i.e., low, medium and high, when the vehicle controller 135 detects that the system fault of the first motor 134 reaches the high level, the duty ratio signal demand of the motor water pump 133 starts from 30%, and when the fault level of the first motor 134 is low and medium, the duty ratio of the motor water pump 133 is controlled according to the normal duty ratio signal demand and the corresponding duty ratio of the motor water pump 133.
For example, when the vehicle controller 135 detects that the system fault of the first motor 134 reaches a high level, the duty ratio signal demand of the motor water pump 133 increases from 30%, the duty ratio of the motor water pump 133 is 80%, when the duty ratio signal of the motor water pump 133 increases to 40%, the duty ratio of the motor water pump 133 is 90%, and when the duty ratio signal of the motor water pump 133 increases to 50%, the duty ratio of the motor water pump 133 is adjusted to 93%.
For another example, when the fault level of the first motor 134 is low, the duty signal demand of the motor water pump 133 is increased from 0, the duty ratio of the motor water pump 133 is 20%, when the duty ratio signal of the motor water pump 133 is increased to 20%, the duty ratio of the motor water pump 133 is 60%, when the duty ratio signal of the motor water pump 133 is increased to 30%, the duty ratio of the motor water pump 133 is 80%, when the duty ratio signal of the motor water pump 133 is increased to 40%, the duty ratio of the motor water pump 133 is 90%, and when the duty ratio signal of the motor water pump 133 is increased to 50%, the duty ratio of the motor water pump 133 is adjusted to 93%.
According to the vehicle of the embodiment of the third aspect of the invention, the control method of the cooling system of the vehicle according to the embodiment of the second aspect of the invention described above is applied.
Other components of a vehicle, such as wheels and housings, and the operation of a vehicle according to embodiments of the invention are known to those of ordinary skill in the art and will not be described in detail herein.
According to the vehicle of the embodiment of the invention, by applying the control method of the cooling system of the vehicle of the embodiment of the second aspect described above, the overall performance of the vehicle is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (13)
1. A cooling system of a vehicle, characterized by comprising:
a transmission cooling system, an engine cooling system and a motor cooling system;
the transmission cooling system, the engine heat dissipation system and the motor cooling system are all connected with a vehicle controller;
the transmission cooling system includes: the system comprises a first radiator, a first heat exchange pipe, a transmission water pump, a transmission oil cooler and a first three-way valve;
the two ends of the first heat exchange pipe are respectively connected with the first radiator to form a transmission cooling circulation loop, the transmission water pump and the transmission oil cooler are connected in series with the first heat exchange pipe, and the transmission water pump is positioned between the transmission oil cooler and the first radiator;
the first three-way valve is positioned between the transmission oil cooler and the first radiator and is connected in series with the first heat exchange pipe through a first interface of the first three-way valve and a third interface of the first three-way valve;
and one end of the second heat exchange tube is connected with the second interface of the first three-way valve, and the other end of the second heat exchange tube is connected with the first radiator.
2. The cooling system of a vehicle according to claim 1, wherein the motor cooling system includes:
the second radiator, the motor water pump, the first motor, the second motor and the second three-way valve;
one end of the second radiator is connected with the motor water pump through a pipeline, and the other end of the second radiator is respectively communicated with the cooler of the first motor and the cooler of the second motor through pipelines;
the motor water pump is connected with a first interface of the second three-way valve through a pipeline;
a third interface of the second three-way valve is communicated with a cooler of the first motor through a pipeline;
and a second interface of the second three-way valve is communicated with a cooler of the second motor through a pipeline.
3. The cooling system of a vehicle according to claim 2, wherein said first radiator is a high temperature radiator, and said second radiator is a low temperature radiator;
both ends of the engine cooling system are communicated with the second radiator to form the engine low-temperature cooling system;
one end of the engine heat dissipation system is communicated with the first heat exchange tube, and the other end of the engine heat dissipation system is communicated with the second heat exchange tube, so that the high-temperature heat dissipation system of the engine is formed.
4. A control method of a cooling system of a vehicle, characterized in that the cooling system of the vehicle is the cooling system of the vehicle according to any one of claims 1 to 3, the control method comprising:
acquiring a first temperature and a second temperature of the vehicle, and judging whether the first temperature meets a first preset temperature and whether the second temperature meets a second preset temperature, wherein the first temperature comprises a transmission oil temperature and an engine water temperature, and the second temperature comprises a first motor temperature and a second motor temperature;
if the first temperature meets a first preset temperature and the second temperature does not meet a second preset temperature, adjusting the duty ratio of the transmission water pump to a first preset duty ratio, and communicating a first interface of the first three-way valve with a preset interface of the first three-way valve;
and if the first temperature does not meet the first preset temperature and the second temperature meets the second preset temperature, adjusting the duty ratio of the motor water pump to the second preset duty ratio, and communicating the first interface of the second three-way valve with the preset interface of the second three-way valve.
5. The control method of a cooling system of a vehicle according to claim 4, characterized by further comprising:
if the first temperature meets the first preset temperature and the second temperature meets the second preset temperature, the duty ratio of the transmission water pump is adjusted to the first preset duty ratio, the first interface of the first three-way valve is communicated with the preset interface, and/or the duty ratio of the motor water pump is adjusted to the second preset duty ratio, and the first interface of the second three-way valve is communicated with the preset interface.
6. The control method of a cooling system of a vehicle according to claim 4 or 5,
if the first temperature satisfies first preset temperature, and when the second temperature does not satisfy the second preset temperature, will the duty cycle of derailleur water pump is adjusted to first preset duty cycle, and will the first interface of first three-way valve with predetermine the interface intercommunication, include:
when the transmission oil temperature meets a first preset oil temperature and the engine water temperature meets a first preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a third preset duty ratio, and a first interface of the first three-way valve and a second interface of the first three-way valve are connected; or
When the transmission oil temperature meets a second preset oil temperature and the engine water temperature meets a second preset water temperature, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a fourth preset duty ratio, and a first interface of the first three-way valve and a third interface of the first three-way valve are connected; or
And when the oil temperature of the transmission meets a third preset oil temperature and the water temperature of the engine meets a third preset water temperature and the second temperature does not meet the preset temperature, the duty ratio of the water pump of the transmission is adjusted to a fifth preset duty ratio, and the first interface of the first three-way valve and the third interface of the first three-way valve are connected.
7. The control method of a cooling system of a vehicle according to claim 4,
when the first interface of the first three-way valve is communicated with the third interface of the first three-way valve and the second interface of the first three-way valve is not closed, the vehicle controller records a fault code and controls the transmission water pump to stop rotating.
8. The control method of a cooling system of a vehicle according to claim 4,
if the first temperature satisfies first preset temperature, and when the second temperature does not satisfy the second preset temperature, will the duty cycle of derailleur water pump is adjusted to first preset duty cycle, and will the first interface of first three-way valve with predetermine the interface intercommunication, include:
and when the transmission oil temperature meets a fourth preset oil temperature, the engine water temperature meets a fourth preset water temperature, and a difference value between the fourth preset water temperature and the fourth preset oil temperature is greater than a preset value, and the second temperature does not meet the preset temperature, the duty ratio of the transmission water pump is adjusted to a sixth preset duty ratio, and the first interface of the first three-way valve and the second interface of the first three-way valve are connected.
9. The control method of a cooling system of a vehicle according to claim 4,
if the first temperature does not satisfy the first preset temperature and the second temperature satisfies the second preset temperature, the duty ratio of the motor water pump is adjusted to the second preset duty ratio, and the first interface of the second three-way valve is communicated with the preset interface of the second three-way valve, including:
if the first temperature does not meet the first preset temperature, and the first motor temperature meets the first preset motor temperature and the second motor temperature does not meet the second preset motor temperature, adjusting the duty ratio of the motor water pump to a seventh preset duty ratio, and communicating the first interface of the second three-way valve with the third interface of the second three-way valve; or
If the first temperature does not meet the first preset temperature, and the first motor temperature does not meet the first preset motor temperature and the second motor temperature meets the second preset motor temperature, the duty ratio of the motor water pump is adjusted to the eighth preset duty ratio, and the first interface of the second three-way valve is communicated with the second interface of the second three-way valve.
10. The control method of a cooling system of a vehicle according to claim 9,
if the first temperature does not satisfy the first preset temperature, and the first motor temperature satisfies the first preset motor temperature and the second motor temperature satisfies the second preset motor temperature, the duty ratio of the motor water pump is adjusted to a ninth preset duty ratio, and the first interface of the second three-way valve is communicated with the second interface of the second three-way valve and the third interface of the second three-way valve respectively.
11. The control method of a cooling system of a vehicle according to claim 10,
calculating a duty ratio signal request value of the motor water pump according to the temperature value of the first motor, and determining whether the duty ratio signal request value is within a preset request range;
if the duty ratio signal request value is within a preset request range, selecting the duty ratio of the motor water pump corresponding to the preset request range;
the duty cycle of the motor water pump comprises the seventh preset duty cycle, the eighth preset duty cycle or the ninth preset duty cycle.
12. The control method of a cooling system of a vehicle according to claim 10,
the control method further comprises the following steps: acquiring a first motor running state, and determining whether the first motor is in fault according to the first motor running state;
when the first motor fails, controlling the duty ratio of a cooling fan of the vehicle and the duty ratio of a water pump of the motor to operate at a tenth preset duty ratio, and determining the failure level of the first motor;
and when the first motor fault level is greater than a preset fault level, controlling the duty ratio of the motor water pump to operate at an eleventh preset duty ratio.
13. A vehicle characterized by applying the control method of the cooling system of the vehicle according to any one of claims 4 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210030947.1A CN115111042B (en) | 2022-01-12 | 2022-01-12 | Cooling system for vehicle, control method for cooling system for vehicle, and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210030947.1A CN115111042B (en) | 2022-01-12 | 2022-01-12 | Cooling system for vehicle, control method for cooling system for vehicle, and vehicle |
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| CN115111042B CN115111042B (en) | 2024-05-28 |
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