CN111255541A - Engine preheating system of hybrid electric vehicle and control method thereof - Google Patents
Engine preheating system of hybrid electric vehicle and control method thereof Download PDFInfo
- Publication number
- CN111255541A CN111255541A CN202010245156.1A CN202010245156A CN111255541A CN 111255541 A CN111255541 A CN 111255541A CN 202010245156 A CN202010245156 A CN 202010245156A CN 111255541 A CN111255541 A CN 111255541A
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- China
- Prior art keywords
- engine
- pipeline
- electromagnetic valve
- radiator
- bypass pipe
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Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000000110 cooling liquid Substances 0.000 claims abstract description 17
- 239000002826 coolant Substances 0.000 claims abstract description 15
- 239000010705 motor oil Substances 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a hybrid electric vehicle engine preheating system.A coolant outlet of an engine is connected with an engine radiator through a first pipeline, and a coolant inlet of the engine is connected with the engine radiator through a second pipeline; the water inlet of motor cooler passes through the third pipeline and is connected with the radiator of driving of electricity, the delivery port of motor oil cooler passes through the fourth pipeline and is connected with the radiator of driving of electricity, first pipeline and third pipeline intercommunication and intercommunication department are equipped with the solenoid valve, second pipeline and fourth pipeline intercommunication and intercommunication department are equipped with the solenoid valve. The motor cooling liquid is used for heating the engine, so that the engine can normally run when being started at a low temperature, and unnecessary abrasion and energy loss caused by over-low temperature are avoided; in addition, the low-temperature engine is used for reducing the temperature of the click cooling liquid, so that the environment is protected, the reliability is realized, and the energy is saved.
Description
Technical Field
The invention relates to the field of engine preheating.
Background
At present, in a mainstream extended range hybrid electric vehicle thermal management scheme, engine coolant and motor coolant are two independent loops. The motor cooling liquid is cooled by a fan, and the engine is heated by self energy when being started at low temperature.
In the traditional design, the temperature is room temperature when the engine is started, under the temperature, the lubricating oil is in a poor state, the engine can generate certain abrasion, therefore, more energy of the engine is lost in a mode of generating heat energy, and the motor cooling liquid is cooled by a cooling fan and needs to consume certain electric energy.
Disclosure of Invention
The invention aims to realize that the engine can be heated under the condition that the engine is not started and can reach the optimal working state when the engine is started, thereby reducing energy loss and mechanical abrasion of the engine. Meanwhile, the motor cooling liquid can be cooled, the energy consumption of a cooling fan is reduced, and the energy of an engine preheating system is saved.
In order to achieve the purpose, the invention adopts the technical scheme that: a preheating system for an engine of a hybrid electric vehicle is characterized in that a coolant outlet of the engine is connected with an engine radiator through a first pipeline, and a coolant inlet of the engine is connected with the engine radiator through a second pipeline; the water inlet of motor cooler passes through the third pipeline and is connected with the radiator of driving of electricity, the delivery port of motor oil cooler passes through the fourth pipeline and is connected with the radiator of driving of electricity, first pipeline and third pipeline intercommunication and intercommunication department are equipped with the solenoid valve, second pipeline and fourth pipeline intercommunication and intercommunication department are equipped with the solenoid valve.
The first pipeline and the third pipeline are communicated through a first bypass pipe, a three-way electromagnetic valve is arranged at the joint of the first pipeline and the first bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the third pipeline and the first bypass pipe, or an electromagnetic valve is arranged on the first bypass pipe; the second pipeline and the fourth pipeline are communicated through a second bypass pipe, a three-way electromagnetic valve is arranged at the joint of the second pipeline and the second bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the fourth pipeline and the second bypass pipe, or an electromagnetic valve is arranged on the second bypass pipe.
And temperature sensors are arranged in the cooling liquid in the engine and the cooling liquid of the motor.
The system is provided with a controller, the two temperature sensors are connected with the controller through signal lines and output temperature signals to the controller, and the electromagnetic valve or the three-way electromagnetic valve is connected with the controller through the signal lines and receives control signals.
The control method based on the hybrid electric vehicle engine preheating system comprises the following steps:
when the following preheating conditions are met, starting the preheating function of the engine;
1) the automobile is in a pure electric mode working condition;
2) the current temperature of the motor coolant exceeds a set value;
the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the engine.
The warm-up condition further includes an in-engine coolant temperature being below a first threshold.
When the following optional closing conditions are met, the engine preheating function is closed;
1) the automobile is in a hybrid or pure fuel driving mode working condition;
2) the temperature of the cooling liquid in the engine is higher than a second threshold value, and the second threshold value is larger than the first threshold value;
the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the electric driving radiator.
When the preheating function of the engine is started, the electrically-driven radiator is closed; when the preheating function of the engine is closed, the automobile is still in the pure electric mode working condition, and then the electric drive radiator is started.
The motor cooling liquid is used for heating the engine, so that the engine can normally run when being started at a low temperature, and unnecessary abrasion and energy loss caused by over-low temperature are avoided; in addition, the low-temperature engine is used for reducing the temperature of the click cooling liquid, so that the environment is protected, the reliability is realized, and the energy is saved.
Drawings
The following is a brief description of the contents of each figure in the description of the present invention:
FIG. 1 is a schematic diagram of a hybrid vehicle engine warm-up system.
Detailed Description
The following description of the embodiments with reference to the drawings is provided to describe the embodiments of the present invention, and the embodiments of the present invention, such as the shapes and configurations of the components, the mutual positions and connection relationships of the components, the functions and working principles of the components, the manufacturing processes and the operation and use methods, etc., will be further described in detail to help those skilled in the art to more completely, accurately and deeply understand the inventive concept and technical solutions of the present invention.
As shown in fig. 1, the engine preheating system of the hybrid electric vehicle is provided with two sets of heat dissipation system structures, namely an engine cooling system and a motor cooling system, of the conventional hybrid electric vehicle, wherein a coolant outlet of an engine of the engine cooling system is connected with an engine radiator through a first pipeline, and a coolant inlet of the engine is connected with the engine radiator through a second pipeline. The water inlet of a motor cooler of the motor cooling system is connected with the electric driving radiator through a third pipeline, and the water outlet of the motor oil cooler is connected with the electric driving radiator through a fourth pipeline. The first pipeline and the third pipeline based on the two systems are communicated and communicated with each other, and the electromagnetic valve is arranged at the position where the second pipeline and the fourth pipeline are communicated and communicated with each other.
The communication mode can adopt the following modes as long as the pipelines can be communicated with each other:
the first pipeline and the third pipeline are communicated through a first bypass pipe, a three-way electromagnetic valve is arranged at the joint of the first pipeline and the first bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the third pipeline and the first bypass pipe, or an electromagnetic valve is arranged on the first bypass pipe;
the second pipeline and the fourth pipeline are communicated through a second bypass pipe, a three-way electromagnetic valve is arranged at the joint of the second pipeline and the second bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the fourth pipeline and the second bypass pipe, or an electromagnetic valve is arranged on the second bypass pipe.
Two circulation modes can be formed by the on-off state of the electromagnetic valve or the three-way electromagnetic valve, wherein the first circulation mode is a conventional mode, namely the electromagnetic valve or the three-way electromagnetic valve enables an engine cooling system and a motor cooling system to be independent from each other and not to circulate; the second circulation mode is a preheating mode, namely the electromagnetic valve or the three-way electromagnetic valve enables the motor oil cooler to be communicated with the generator and cuts off the communication relation between the motor oil cooler and the electric driving radiator.
In order to facilitate control, the system is provided with an independent controller, temperature sensors are arranged in cooling liquid in an engine and motor cooling liquid, the two temperature sensors are connected with the controller through signal lines and output temperature signals to the controller, the temperature of the cooling liquid in two cooling cycles is independently collected through the two temperature sensors, and an electromagnetic valve or a three-way electromagnetic valve is connected with the controller through the signal lines and receives control signals, so that the circulation mode is adjusted.
The control method based on the engine preheating system of the hybrid electric vehicle comprises the following steps:
in a normal state or when the automobile is just started, a first circulation mode is adopted between the engine cooling system and the motor cooling system;
when the following preheating conditions are met, starting the preheating function of the engine;
1) the automobile is in a pure electric mode working condition;
2) the current temperature of the motor coolant exceeds a set value;
3) the preheating condition also comprises that the temperature of the internal oil in the engine is lower than a first threshold value (the situation that the heat dissipation of the motor is influenced because the internal oil temperature is too high when the engine is operated before is avoided);
the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the engine, namely, a second circulation mode is constructed.
When the engine warm-up function is activated, it is preferable to turn off the electrically driven radiator, since this does not affect the motor cooling state, and turning it off can reduce power consumption; when the preheating function of the engine is closed, the automobile is still in the pure electric mode working condition, and then the electric drive radiator is opened, so that the normal operation of the cooling function of the motor is ensured.
In the running process of the preheating function of the engine, if the following optional closing conditions are met, the preheating function of the engine is closed;
1) the automobile is in a mixed-motion or pure fuel oil driving mode working condition, namely the working mode of the automobile is changed, the engine is already operated, and preheating is not needed;
2) the temperature of the cooling liquid in the engine is higher than a second threshold value, namely the engine runs before without preheating, and the second threshold value is required to be larger than the first threshold value, so that repeated switching between two circulation modes is avoided;
the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the electric driving radiator.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (9)
1. A preheating system for an engine of a hybrid electric vehicle is characterized in that a coolant outlet of the engine is connected with an engine radiator through a first pipeline, and a coolant inlet of the engine is connected with the engine radiator through a second pipeline; the water inlet of motor cooler passes through the third pipeline and is connected with the radiator of driving of electricity, the delivery port of motor oil cooler passes through the fourth pipeline and is connected its characterized in that with the radiator of driving of electricity: the first pipeline and the third pipeline are communicated and communicated with each other, an electromagnetic valve is arranged at the position, communicated with each other, of the second pipeline and the fourth pipeline, and an electromagnetic valve is arranged at the position, communicated with each other, of the second pipeline and the fourth pipeline.
2. The hybrid vehicle engine warm-up system according to claim 1, characterized in that: the first pipeline and the third pipeline are communicated through a first bypass pipe, a three-way electromagnetic valve is arranged at the joint of the first pipeline and the first bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the third pipeline and the first bypass pipe, or an electromagnetic valve is arranged on the first bypass pipe; the second pipeline and the fourth pipeline are communicated through a second bypass pipe, a three-way electromagnetic valve is arranged at the joint of the second pipeline and the second bypass pipe, or a three-way electromagnetic valve is arranged at the joint of the fourth pipeline and the second bypass pipe, or an electromagnetic valve is arranged on the second bypass pipe.
3. The hybrid vehicle engine warm-up system according to claim 1 or 2, characterized in that: and temperature sensors are arranged in the cooling liquid in the engine and the cooling liquid of the motor.
4. The hybrid vehicle engine warm-up system according to claim 3, characterized in that: the system is provided with a controller, the two temperature sensors are connected with the controller through signal lines and output temperature signals to the controller, and the electromagnetic valve or the three-way electromagnetic valve is connected with the controller through the signal lines and receives control signals.
5. The control method of the engine warm-up system for the hybrid vehicle according to any one of claims 1 to 4, characterized in that:
when the following preheating conditions are met, starting the preheating function of the engine;
1) the automobile is in a pure electric mode working condition;
2) the current temperature of the motor coolant exceeds a set value;
the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the engine.
6. The control method according to claim 5, characterized in that: the warm-up condition further includes an in-engine coolant temperature being below a first threshold.
7. The control method according to claim 6, characterized in that: when the following optional closing conditions are met, the engine preheating function is closed;
1) the automobile is in a hybrid or pure fuel driving mode working condition;
2) the temperature of the cooling liquid in the engine is higher than a second threshold value, and the second threshold value is larger than the first threshold value.
8. The control method according to claim 5, 6 or 7, characterized in that: the preheating function of the engine is to control the electromagnetic valve or the three-way electromagnetic valve to enable a circulation loop to be formed between the motor oil cooler and the electric driving radiator.
9. The control method according to claim 8, characterized in that: when the preheating function of the engine is started, the electrically-driven radiator is closed; when the preheating function of the engine is closed, the automobile is still in the pure electric mode working condition, and then the electric drive radiator is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245156.1A CN111255541A (en) | 2020-03-31 | 2020-03-31 | Engine preheating system of hybrid electric vehicle and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245156.1A CN111255541A (en) | 2020-03-31 | 2020-03-31 | Engine preheating system of hybrid electric vehicle and control method thereof |
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| Publication Number | Publication Date |
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| CN111255541A true CN111255541A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010245156.1A Pending CN111255541A (en) | 2020-03-31 | 2020-03-31 | Engine preheating system of hybrid electric vehicle and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111907512A (en) * | 2020-07-29 | 2020-11-10 | 一汽解放青岛汽车有限公司 | Cold start control method for hybrid vehicle and vehicle |
| CN114593000A (en) * | 2022-03-17 | 2022-06-07 | 合众新能源汽车有限公司 | Vehicle heat cycle system, and engine preheating method and device |
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