CN112360787B - Fan management method for plug-in hybrid electric vehicle - Google Patents
Fan management method for plug-in hybrid electric vehicle Download PDFInfo
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- CN112360787B CN112360787B CN202011091669.8A CN202011091669A CN112360787B CN 112360787 B CN112360787 B CN 112360787B CN 202011091669 A CN202011091669 A CN 202011091669A CN 112360787 B CN112360787 B CN 112360787B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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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
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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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
- F01P2050/00—Applications
- F01P2050/24—Hybrid vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
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- Combustion & Propulsion (AREA)
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Abstract
A fan management method for an plug-in hybrid electric vehicle comprises a battery loop cooling fan control method, a motor loop cooling fan control method, a post-operation cooling fan control method and a fan final request control method, wherein the fan final request control method is based on the battery loop cooling fan control method, the motor loop cooling fan control method and the post-operation cooling fan control method. The invention carries out active judgment according to the IPU loop temperature signal in combination with conditions such as vehicle speed, environment temperature and the like, establishes a fan final request control method based on a battery loop cooling fan control method, a motor loop cooling fan control method and a post-operation cooling fan control method, ensures the normal operation of related new energy components, and properly reduces output to achieve the aim of reducing energy consumption.
Description
Technical Field
The invention relates to the technical field of new energy of automobiles, in particular to a fan management method for an electric plug hybrid vehicle type.
Background
At present, the domestic research on the plug-in hybrid vehicle type heat management system belongs to the starting stage, a control method of a new energy vehicle type fan by a host factory is relatively deficient, and the common method is to perform heat management control software analysis and integration work by means of a supplier with calibration experience. The current mainstream fan control method controls the rotating speed of the fan according to the input of an IPU (intelligent Processing Unit), only passively receives instructions and cannot actively judge, and certain energy waste and control surplus exist.
Disclosure of Invention
In view of the above, the present invention provides a fan management method for a plug-in hybrid electric vehicle.
The invention provides a fan management method for an electric plug-in hybrid electric vehicle, which is characterized by comprising the following steps: the fan management method of the plug-in hybrid electric vehicle comprises a battery loop cooling fan control method, a motor loop cooling fan control method, a post-operation cooling fan control method and a fan final request control method, wherein the fan final request control method is based on the battery loop cooling fan control method, the motor loop cooling fan control method and the post-operation cooling fan control method, and the battery loop cooling fan control method comprises the following steps:
if the battery radiator is in a cooling state and the heat exchanger is in a state of waiting for the radiator to be cooled, judging a required gear of the rotating speed of the fan according to the request of the water pump, the target value of the water inlet temperature of the battery, the water inlet temperature of the battery and the ambient temperature;
if the heat exchanger is in a cooling state of the heat exchanger, judging a required gear of the rotating speed of the fan through a compressor request;
if the system is in a rear running state, the required gear for requesting the rotating speed of the fan is 80 percent;
if the heat exchanger is in the maximum refrigeration state of the heat exchanger, the required gear of the rotating speed of the fan is 100%;
if the heat exchanger is in the waiting flushing-maintaining state or the flushing state, or the system is in the off state or the initialization state, the requested gear for requesting the rotation speed of the fan is 0%.
Further, the motor loop cooling fan control method includes duty cycle calculation based on a motor loop state machine, including: and calculating the required gear of the fan according to the duty ratio of the water pump, the temperature of the cooling liquid and the ambient temperature, and if the system is in the maximum cooling state, the required gear of the rotating speed of the fan is 100%.
Further, the motor circuit cooling fan control method further includes a duty cycle limit calculation based on engine conditions, including: judging the running state of the engine, and if the engine runs, the rotating speed of the fan has no maximum limit value; if the engine is not running, the maximum limit of the fan speed is 40%.
Further, the motor circuit cooling fan control method further includes a duty ratio calculation based on a state of charge, including: judging the charging state of the battery, and if the battery is charged, limiting the required gear of the rotating speed of the fan to be 0%; if the battery is not charged, the requested gear for the fan speed is not limited.
Further, the post-operation cooling fan control method includes: and when the battery loop state machine, the motor loop state machine and the engine loop state machine are all in the closed state, the cooling fan control method is operated after the starting.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on a battery circuit state, which includes:
when the charging is finished, if the temperature T of the vehicle-mounted charger is higher than the preset temperature T OBC If the temperature is higher than 70 ℃, setting the running state after charging for 60 seconds, and requesting the fan rotating speed to be 80%;
when the ignition switch is in the off state and the system is in the charging off state, if the highest temperature T of the battery is reached bat_max And if the temperature is higher than 40 ℃, setting the post-operation state for 60 seconds, and requesting the fan speed to be 80%.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on a motor circuit state, which includes: when the ignition switch is in the off state, if the temperature T of the motor is lower than the preset temperature T motor Greater than 80 ℃ or CIDD temperature T CIDD And if the temperature is higher than 80 ℃, setting the running state after charging for 60 seconds, and requesting the fan rotating speed to be 80%.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on an engine circuit state, which includes:
when the ignition switch is in the off state and the system is in the charge off state:
if the engine water temperature T eng If the temperature is higher than 100 ℃, the fan operates a high-level (afterrun high) set for 90 seconds, and the required gear for requesting the rotating speed of the fan is 100%;
if the engine water temperature T eng If the temperature is higher than 100 ℃, setting an afterrun gear (afterrun med) of the fan, keeping for 60 seconds, and requesting 100% of the rotation speed of the fan;
if the engine water temperature T eng Above 95 ℃, the fan rear run low (afterrun low) is set for 30 seconds and the requested gear for the requested fan speed is 60%.
Further, the fan final request control method includes a first final request control method of a fan, which includes:
acquiring a request gear of a fan rotating speed obtained based on a battery loop cooling fan control method;
acquiring a required gear of a fan rotating speed obtained based on a motor loop cooling fan control method;
acquiring a fan rotating speed request gear based on an air conditioner state: determining a required gear of the fan rotating speed of the air conditioner according to the refrigerant pressure, wherein if the refrigerant pressure is less than or equal to 12bar, the required gear of the fan rotating speed is 0%;
acquiring a fan speed request gear based on an engine state: determining a fan rotating speed request according to the water temperature of the engine and a threshold value, and when the water temperature of the engine is smaller than or equal to the difference obtained by subtracting 2 from the threshold value or an ignition switch is in a closed state, setting the requested gear of the fan rotating speed to be 0%;
comparing a requested gear of the fan speed based on the battery circuit cooling fan control method, a requested gear of the fan speed based on the motor circuit cooling fan control method, a requested gear of the fan speed based on the air-conditioning state, and a requested gear of the fan speed based on the engine state, and taking the maximum value thereof as the final requested gear of the first fan to output.
Further, the threshold value is calculated as follows:
if the vehicle speed is greater than or equal to 80kph, the threshold value is 103 ℃;
if the vehicle speed is less than 80kph and more than or equal to 45kph, the threshold value is 98 ℃;
if the vehicle speed is less than 45kph, the threshold value is 96 ℃.
Further, the fan final request control method further includes a second final request control method of the fan, which includes:
step S1: judging the limit value of the rotating speed of the fan according to the conditions of the high voltage and the vehicle speed, if the high voltage is in an ON state and the vehicle speed is less than or equal to 130kph, the limit value of the rotating speed of the fan is 100%, otherwise, the limit value of the rotating speed of the fan is 0%;
step S2: and comparing the fan rotating speed limit value obtained in the step S1 with the first fan final request gear obtained by the first final request control method of the fan, and taking the minimum value as the second fan final request gear to be output.
Further, the fan final request control method further includes a third final request control method of a fan, which includes:
and step S3: outputting a fan request gear according to a rear running fan request;
and step S4: and (4) comparing the fan request gear obtained in the step (S3) with a second fan final request gear obtained by a second final request control method of the fan, and taking the maximum value as a third fan final request gear to output to gear judgment.
According to the invention, the active judgment is carried out according to the IPU loop temperature signal in combination with conditions such as vehicle speed, environment temperature and the like, a fan final request control method based on a battery loop cooling fan control method, a motor loop cooling fan control method and a post-operation cooling fan control method is established, the normal operation of related new energy components is ensured, and the output is properly reduced, so that the aim of reducing the energy consumption is fulfilled.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a system model framework diagram of a fan management method for an electric plug-in hybrid vehicle according to the present invention.
FIG. 2 is a schematic diagram of a battery circuit based on the fan management method of the present invention.
Fig. 3 is a schematic diagram of a method for controlling a cooling fan of a battery circuit according to the present invention.
Fig. 4 is a schematic diagram of a method for controlling a cooling fan of a motor circuit according to the present invention.
Fig. 5 is a schematic diagram of a control method for a post-operation cooling fan according to the present invention.
FIG. 6 is a diagram illustrating a final request control method for a fan according to the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1 and 2, a battery circuit based on the battery thermal management method of the present invention at least includes a battery, a condenser, an evaporator, a compressor, a charger, a heat exchanger, a battery radiator, an electromagnetic valve, an electronic water pump, a cooling fan, and sensors, wherein the sensors include a temperature sensor and a pressure sensor in the present embodiment. The cooling medium loop comprises a solenoid valve ChlTxv, a cooling fan, a condenser, an evaporator, a compressor and a heat exchanger, and the battery loop comprises a solenoid valve VlvHxRad, a battery radiator, an electronic water pump, a charger, a battery and a heat exchanger.
The input signal Inp of the invention is respectively from an engine cycle module Eng, a motor loop module EC, a battery loop module Bat and an air-conditioning loop module ACC, and the output signal Out is the rotating speed of a fan. In addition, a signal is also calculated in the module, namely the Fan post-operation demand Fan-C after the thermal management system has stopped operating.
The fan management method of the plug-in hybrid electric vehicle type comprises a battery loop cooling fan control method, a motor loop cooling fan control method, a post-operation cooling fan control method and a fan final request control method. Wherein the fan final request control method is based on a battery loop cooling fan control method, a motor loop cooling fan control method, and a post-operation cooling fan control method.
Further, the present invention also includes the operation states of many components or systems in the battery circuit system, which are described individually below:
flush status Flush: cleaning the non-operative heat exchanger with a coolant;
heat exchanger open state beller ON: opening a heat exchanger in the refrigerant loop;
heat exchanger OFF state Chiller OFF: closing a heat exchanger in the refrigerant loop;
the refrigeration state of the heat exchanger: the heat exchanger in the refrigerant loop carries out active refrigeration;
heat exchanger maximum cooling state Chiller Max cooling:
the maximum refrigeration state: the radiator in the refrigerant loop is in the maximum refrigeration state;
keeping a flushing state of a Chiller flush: keeping the heat exchanger in a flushing state Flush;
waiting to hold the flush state: active cooling is not carried out, and only the heat exchanger is kept in a flushing state Flush;
further, as shown in fig. 3, the battery circuit cooling fan control method includes:
if the battery radiator is in a cooling state and the heat exchanger is in a state of waiting for the radiator to be cooled, judging a required gear of the rotating speed of the fan according to the request of the water pump, the target value of the water inlet temperature of the battery, the water inlet temperature of the battery and the ambient temperature;
if the heat exchanger is in a cooling state of the heat exchanger, judging a required gear of the rotating speed of the fan through a compressor request;
if the system is in a rear running state, the required gear for requesting the rotating speed of the fan is 80 percent;
if the heat exchanger is in the maximum cooling state of the heat exchanger, 100 percent (full rotation) of the rotating speed of the fan is requested;
if the heat exchanger is waiting to remain in a flushing state or a system is in a closed state or an initialization state, the requested gear for requesting the rotation speed of the fan is 0 (i.e., the fan is not rotating).
Further, the motor circuit cooling fan control method includes performing a duty cycle calculation based on a motor circuit state machine, which includes: and calculating a requested gear of the fan rotating speed request according to the duty ratio of the water pump, the temperature of the cooling liquid and the ambient temperature, and if the system is in the maximum cooling state, requesting the requested gear of the fan rotating speed to be 100% (namely the fan is fully rotated).
Further, as shown in fig. 4, the motor circuit cooling fan control method further includes performing a duty limit calculation based on an engine state, which includes: judging the running state of the engine, and if the engine runs, the rotating speed of the fan has no maximum limit value; if the engine is not running, the maximum limit of the fan speed is 40%.
Further, the motor circuit cooling fan control method further includes performing a state-of-charge based duty cycle calculation including: judging the charging state of the battery, and if the battery is charged, limiting the requested gear of the rotating speed of the fan to be 0; if the battery is not charged, the requested gear of the fan speed is not limited.
Further, as shown in fig. 4, the post-operation cooling fan control method includes: and when the battery loop state machine, the motor loop state machine and the engine loop state machine are all in the closed state, the cooling fan control method is operated after the starting.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on a battery circuit state, which includes:
when the charging is finished, if the temperature T of the vehicle-mounted charger is higher than the preset temperature T OBC If the temperature is higher than 70 ℃, setting the running state after charging (the system enters the running state after charging), continuing for 60 seconds, and requesting the fan rotating speed to have a request gear of 80%;
when the ignition switch is in the off state and the system is in the charging off state, if the highest temperature T of the battery is bat_max And if the temperature is higher than 40 ℃, setting the post-operation state for 60 seconds, and requesting the fan speed to be 80%.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on a motor circuit state, which includes: when the ignition switch is in the off state, if the temperature T of the motor is lower than the preset temperature T motor Greater than 80 ℃ or CIDD (Combined Inverter and DC/DC converter, inverter and DCDC controller combination Module) temperature T CIDD And if the temperature is higher than 80 ℃, setting the running state after charging for 60 seconds, and requesting the fan rotating speed to be 80%.
Further, the post-operation cooling fan control method further includes a cooling fan control method based on an engine circuit state, which includes:
when the ignition switch is in the off state and the system is in the charge off state:
if the engine water temperature T eng If the temperature is higher than 100 ℃, the fan operates the high-level (afterrun high) setting for 90 seconds, and requests the rotating speed of the fanThe requested gear of (1) is 100%;
if the engine water temperature T eng If the temperature is higher than 100 ℃, the rear running gear of the fan is set for 60 seconds, and the requested gear for requesting the rotating speed of the fan is 100 percent;
if the engine water temperature T eng Above 95 ℃, the fan rear run low (afterrun low) is set for 30 seconds and the requested gear for the requested fan speed is 60%.
Further, the fan final request control method includes a first final request control method of a fan, which includes:
acquiring a request gear of a fan rotating speed obtained based on a battery loop cooling fan control method;
acquiring a required gear of a fan rotating speed obtained based on a motor loop cooling fan control method;
acquiring a fan rotating speed request gear based on an air conditioner state: determining a required gear of the fan rotating speed of the air conditioner according to the refrigerant pressure, wherein if the refrigerant pressure is less than or equal to 12bar, the required gear of the fan rotating speed is 0%;
acquiring a fan speed request gear based on an engine state: determining a fan rotating speed request according to the water temperature of the engine and a threshold value, and when the water temperature of the engine is smaller than or equal to the difference obtained by subtracting 2 from the threshold value or an ignition switch is in a closed state, setting the requested gear of the fan rotating speed to be 0%;
comparing a requested gear of the fan speed based on the battery circuit cooling fan control method, a requested gear of the fan speed based on the motor circuit cooling fan control method, a requested gear of the fan speed based on the air-conditioning state, and a requested gear of the fan speed based on the engine state, and taking the maximum value thereof as the final requested gear of the first fan to be output.
Further, the threshold value is calculated as follows:
if the vehicle speed is greater than or equal to 80kph, the threshold value is 103 ℃;
if the vehicle speed is less than 80kph and more than or equal to 45kph, the threshold value is 98 ℃;
if the vehicle speed is less than 45kph, the threshold value is 96 ℃.
Further, the fan final request control method further includes a second final request control method of a fan, which includes:
step S1: judging the fan rotation speed limit value according to the high voltage electricity and the vehicle speed condition, if the high voltage electricity is in an ON state and the vehicle speed is less than or equal to 130kph, the fan rotation speed limit value is 100%, otherwise, the fan rotation speed limit value is 0%;
step S2: and comparing the fan rotating speed limit value obtained in the step S1 with the first fan final request gear obtained by the first final request control method of the fan, and taking the minimum value as the second fan final request gear to be output.
Further, the fan final request control method further includes a third final request control method of a fan, which includes:
and step S3: outputting a fan request gear according to the rear running fan request;
and step S4: and (4) comparing the fan request gear obtained in the step (S3) with a second fan final request gear obtained by a second final request control method of the fan, and taking the maximum value as a third fan final request gear to output to gear judgment.
Further, the determination of the requested gear of the fan is calculated as follows:
table 1: gear calculation for fan
Specifically, if the finally output third fan final request gear is 80%, is larger than the entering range of the High gear and is smaller than the exiting range of the max gear, the third fan final request gear is in the High gear, and the corresponding final fan rotation speed request is 75%; after a period of time, if the third fan final requested gear becomes 65%, it is still in the High gear, and the corresponding final fan speed request is still 75%; if the final requested gear of the third fan is below 60%, the High gear is exited and the med gear is entered, and the corresponding final fan speed request is 50%.
In summary, the present invention actively determines according to the IPU loop temperature signal in combination with the conditions of vehicle speed, ambient temperature, etc., and establishes the fan final request control method based on the battery loop cooling fan control method, the motor loop cooling fan control method, and the post-operation cooling fan control method, so as to ensure the normal operation of the related new energy components and properly reduce the output to achieve the purpose of reducing the energy consumption.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A fan management method for a plug-in hybrid electric vehicle is characterized by comprising the following steps: the fan management method of the plug-in hybrid electric vehicle comprises a battery loop cooling fan control method, a motor loop cooling fan control method, a post-operation cooling fan control method and a fan final request control method, wherein the fan final request control method is based on the battery loop cooling fan control method, the motor loop cooling fan control method and the post-operation cooling fan control method, and the battery loop cooling fan control method comprises the following steps:
if the battery radiator is in a cooling state and the heat exchanger is in a state of waiting for the radiator to be cooled, judging a required gear of the rotating speed of the fan according to the request of the water pump, the target value of the water inlet temperature of the battery, the water inlet temperature of the battery and the ambient temperature;
if the heat exchanger is in a cooling state of the heat exchanger, judging a required gear of the rotating speed of the fan through a compressor request;
if the system is in a rear running state, the required gear for requesting the rotating speed of the fan is 80 percent;
if the heat exchanger is in the maximum refrigeration state of the heat exchanger, the required gear of the rotating speed of the fan is 100%;
if the heat exchanger is in the waiting flushing-maintaining state or the flushing state, or the system is in the off state or the initialization state, the requested gear for requesting the rotation speed of the fan is 0%.
2. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 1, wherein: the motor loop cooling fan control method includes duty cycle calculation based on a motor loop state machine, including: and calculating the required gear of the fan according to the duty ratio of the water pump, the temperature of the cooling liquid and the ambient temperature, and if the system is in the maximum cooling state, the required gear of the rotating speed of the fan is 100%.
3. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 1, wherein: the motor circuit cooling fan control method further includes a duty cycle limit calculation based on an engine state, including: judging the running state of the engine, and if the engine runs, the rotating speed of the fan has no maximum limit value; if the engine is not running, the maximum limit of the fan speed is 40%.
4. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 1, wherein: the motor circuit cooling fan control method further includes a state-of-charge based duty cycle calculation that includes: judging the charging state of the battery, and if the battery is charged, limiting the required gear of the rotating speed of the fan to be 0%; if the battery is not charged, the requested gear for the fan speed is not limited.
5. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 1, wherein: the post-operation cooling fan control method includes: and when the battery loop state machine, the motor loop state machine and the engine loop state machine are all in the closed state, the cooling fan control method is operated after the starting.
6. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 3, wherein: the post-operation cooling fan control method further includes a cooling fan control method based on a battery circuit state, which includes:
when the charging is finished, if the temperature T of the vehicle-mounted charger is higher than the preset temperature T OBC If the temperature is higher than 70 ℃, setting the running state after charging for 60 seconds, and requesting the fan rotating speed to be 80%;
when the ignition switch is in the off state and the system is in the charging off state, if the highest temperature T of the battery is reached bat_max And if the temperature is higher than 40 ℃, setting the post-operation state for 60 seconds, and requesting the fan speed to be 80%.
7. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 3, wherein: the post-operation cooling fan control method further includes a cooling fan control method based on a motor loop state, which includes: when the ignition switch is in the off state, if the temperature T of the motor is lower than the preset temperature T motor Greater than 80 ℃ or CIDD temperature T CIDD And if the temperature is higher than 80 ℃, setting the operation state after charging for 60 seconds, and requesting the fan rotating speed to be at a requested gear position of 80%.
8. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 3, wherein: the post-run cooling fan control method further includes a cooling fan control method based on an engine circuit state, which includes:
when the ignition switch is in the off state and the system is in the charge off state:
if the engine water temperature T eng If the temperature is higher than 100 ℃, the fan operates a high-level (afterrun high) set for 90 seconds, and the required gear for requesting the rotating speed of the fan is 100%;
if the engine water temperature T eng If the temperature is higher than 100 ℃, setting an afterrun gear (afterrun med) of the fan, keeping for 60 seconds, and requesting 100% of the rotation speed of the fan;
if the engine water temperature T eng Above 95 ℃, the fan rear run low (afterrun low) is set for 30 seconds and the requested gear for the requested fan speed is 60%.
9. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 1, wherein: the fan final request control method includes a first final request control method of a fan, which includes:
acquiring a request gear of a fan rotating speed obtained based on a battery loop cooling fan control method;
acquiring a required gear of a fan rotating speed obtained by a motor loop cooling fan control method;
acquiring a fan rotating speed request gear based on an air conditioner state: determining a required gear of the fan rotating speed of the air conditioner according to the refrigerant pressure, wherein if the refrigerant pressure is less than or equal to 12bar, the required gear of the fan rotating speed is 0%;
acquiring a fan speed request gear based on an engine state: determining a fan rotating speed request according to the water temperature of the engine and a threshold value, and when the water temperature of the engine is smaller than or equal to the difference obtained by subtracting 2 from the threshold value or an ignition switch is in a closed state, setting the requested gear of the fan rotating speed to be 0%;
comparing a requested gear of the fan speed based on the battery circuit cooling fan control method, a requested gear of the fan speed based on the motor circuit cooling fan control method, a requested gear of the fan speed based on the air-conditioning state, and a requested gear of the fan speed based on the engine state, and taking the maximum value thereof as the final requested gear of the first fan to be output.
10. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 9, wherein: the threshold value is calculated as follows:
if the vehicle speed is greater than or equal to 80kph, the threshold value is 103 ℃;
if the vehicle speed is less than 80kph and more than or equal to 45kph, the threshold value is 98 ℃;
if the vehicle speed is less than 45kph, the threshold value is 96 ℃.
11. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 9, wherein: the fan final request control method further includes a second final request control method of a fan, which includes:
step S1: judging the fan rotation speed limit value according to the high voltage electricity and the vehicle speed condition, if the high voltage electricity is in an ON state and the vehicle speed is less than or equal to 130kph, the fan rotation speed limit value is 100%, otherwise, the fan rotation speed limit value is 0%;
step S2: and comparing the fan rotating speed limit value obtained in the step S1 with the first fan final request gear obtained by the first final request control method of the fan, and taking the minimum value as the second fan final request gear to be output.
12. The method for managing the fan of the plug-in hybrid electric vehicle according to claim 11, wherein: the fan final request control method further includes a third final request control method of a fan, which includes:
and step S3: outputting a fan request gear according to a rear running fan request;
and step S4: and (4) comparing the fan request gear obtained in the step (S3) with a second fan final request gear obtained by a second final request control method of the fan, and taking the maximum value as a third fan final request gear to output to gear judgment.
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| CN202011091669.8A CN112360787B (en) | 2020-10-13 | 2020-10-13 | Fan management method for plug-in hybrid electric vehicle |
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| CN202011091669.8A CN112360787B (en) | 2020-10-13 | 2020-10-13 | Fan management method for plug-in hybrid electric vehicle |
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| CN112360787B true CN112360787B (en) | 2022-11-11 |
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