CN110985260B - Range extender starting control method and equipment, range extender electric vehicle and storage medium - Google Patents
Range extender starting control method and equipment, range extender electric vehicle and storage medium Download PDFInfo
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- CN110985260B CN110985260B CN201911164457.5A CN201911164457A CN110985260B CN 110985260 B CN110985260 B CN 110985260B CN 201911164457 A CN201911164457 A CN 201911164457A CN 110985260 B CN110985260 B CN 110985260B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0803—Circuits or control means specially adapted for starting of engines characterised by means for initiating engine start or stop
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a range extender starting control method and equipment, a range extender electric vehicle and a storage medium. The method comprises the following steps: causing the starter motor to attempt to start the engine at a preset first torque value; in the event of a failure to start the engine at the first torque value, causing the starter motor to attempt to gradually increase the starting torque to a preset second torque value to start the engine; in the event of a failure to start the engine at the second torque value, causing the starter motor to attempt to maintain the second torque value for a first preset time period to start the engine; under the condition that the engine is failed to start continuously for a first preset time period, the starting motor is stopped and started due to the failure of starting; and in the event that starting the engine by the starter motor at the first torque value or the first torque value is successful, causing the starter motor to gradually reduce the starter torque to a preset third torque value for a second preset time period. The invention provides a control scheme capable of enabling a range extender to be started reliably.
Description
Technical Field
The present disclosure relates to the field of electric vehicle technology, and more particularly, to a start control method and apparatus for a range extender, a range extender electric vehicle, and a computer-readable storage medium.
Background
At present, with the popularization of new energy automobiles, the application of extended range electric automobiles is more and more extensive. The range-extended electric vehicle is an electric vehicle which is characterized in that a range extender, namely a system consisting of an engine (such as an internal combustion engine) and a generator, is added on the basis of a pure electric vehicle to charge a power battery of the vehicle or directly drive a motor of the vehicle so as to increase the endurance mileage, so that the defect of short driving mileage of the pure electric vehicle is overcome. Under normal conditions, the power battery of the extended range electric vehicle stores enough electricity, and the power source of the driving motor is mainly the power battery. Within a certain driving time range, the driving characteristics of the vehicle are the same as those of a pure electric vehicle, and zero oil consumption, zero pollution and zero emission are really realized. When the residual electric quantity (SOC) of the power battery is reduced to a certain set lower limit value, the vehicle-mounted generator set (range extending mode) starts to work, and the driving range of the vehicle-mounted generator set is continuously extended.
The range extender is generally in a standby state and does not work often, so that lubrication and maintenance of the range extender are generally ignored, and the state of the range extender is difficult to predict. When the range extender is required to work, the range extender is expected to start immediately, and therefore, the starting reliability is the key point of the development of the range extender.
Disclosure of Invention
In view of the above, one of the objectives of the embodiments of the present disclosure is to solve one or more of the foregoing problems and to provide a technical solution capable of improving the reliability of the start-up of the range extender.
The invention discloses a starting control method of a range extender, which is used for a range extender electric automobile, wherein the range extender comprises an engine and a generator, the engine is directly connected with the generator, the starting of the engine is realized by a driving motor connected with the engine, and the method comprises the following steps:
s11: causing the starter motor to attempt to start the engine at a preset first torque value;
s12: in the event of a failure to start the engine at the first torque value, causing the starter motor to attempt to gradually increase the starting torque to a preset second torque value to start the engine;
s13: in the event of a failure to start the engine at the second torque value, causing the starter motor to attempt to maintain the second torque value for a first preset time period to start the engine;
s14: under the condition that the engine is failed to start continuously for a first preset time period, the starting motor is stopped and started due to the failure of starting; and
s15: in the case where the starting of the engine by the starter motor at the first torque value or the first torque value is successful, the starter motor is caused to gradually reduce the starting torque to a preset third torque value for a second preset time period.
Further, after step S15, the method further includes:
s16: and under the condition that the engine cannot be ignited when the starting motor drives the engine at the third torque value for more than the second preset time, the starting motor is stopped due to failed starting.
Further, the method comprises the steps of:
s31: enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value or not according to a preset starting strategy;
s32: and when the torque value needs to be reduced to the fourth torque value, the starting motor is stopped due to the failed starting.
Further, the method comprises the steps of:
s41: enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value or not according to a preset starting strategy;
s42: when the torque needs to be reduced to a fourth torque value, whether the engine needs to run in an idle speed mode is further judged according to a preset starting strategy; and
s43: and when the engine needs to run at the idle speed, driving the engine by the starting motor with the fourth torque value to realize the idle speed running of the engine.
Further, the method comprises the steps of:
s44: and when the engine does not need to run in an idling mode, the starting motor is stopped and started due to failed starting.
Further, the method further comprises:
s61: accumulating the starting times of the starting motor due to the failed starting; and
s62: and sending an alarm message when the accumulated number of attempts reaches a preset starting failure threshold value.
Further, the method further comprises:
s71: acquiring the ambient temperature of the range extender;
s72: the first torque value, the second torque value, and the third torque value are adjusted according to an ambient temperature of the range extender.
The invention also discloses a starting control device of the range extender, which is used for the range extender electric automobile, the range extender comprises an engine and a generator, the engine is directly connected with the generator, the starting of the engine is realized by driving the motor, and the starting control device comprises:
a first torque starting device for causing the starter motor to attempt to start the engine at a preset first torque value;
second torque starting means for causing the starter motor to attempt to gradually increase the starting torque to a preset second torque value to start the engine in the event of a failure to start the engine at the first torque value;
second torque start adjustment means for causing the starter motor to attempt to maintain the second torque value for a first preset time period to start the engine in the event of a failure to start the engine at the second torque value;
first stop-start means for stopping the start of the starter motor due to a start failure in the case where the start of the engine fails for a first preset time period; and
and third torque starting means for causing the starter motor to gradually reduce the starting torque to a preset third torque value for a second preset time period in the case where the starter motor succeeds in starting the engine at the first torque value or the first torque value.
The invention also discloses an extended range electric automobile which comprises a starting motor, a range extender and a whole automobile control unit, wherein the whole automobile control unit is connected with the starting motor, the starting motor is connected with the range extender, and the whole automobile control unit is configured to execute the starting control method of the range extender.
The invention also discloses a computer readable storage medium, which comprises computer executable instructions stored thereon, and the executable instructions are executed by the controller to execute the starting control method of the range extender.
According to the embodiment of the invention, a control scheme capable of enabling the range extender to be started reliably is provided, the ignition success rate of the internal combustion engine can be improved, and the starting reliability can be improved. Further, various torque values are adjusted in consideration of the environmental stability of the electric vehicle, so that the engine can adapt to different temperatures of the engine, and the starting success rate of the range extender is improved.
Drawings
Fig. 1 shows a schematic flow chart of a start control method of a range extender according to an embodiment of the present disclosure.
Fig. 2 shows a flow chart of a method for controlling the start of a range extender according to another embodiment of the disclosure.
Fig. 3 shows a flow chart of a start control method of a range extender according to another embodiment of the present disclosure.
Fig. 4 shows a flow chart of a start control method of a range extender according to still another embodiment of the present disclosure.
Fig. 5 shows a flow chart of a start control method of a range extender according to still another embodiment of the present disclosure.
Fig. 6 illustrates a start control method of a range extender according to still another embodiment of the present disclosure.
Fig. 7 shows a flow chart of a start control method of a range extender according to yet another embodiment of the present disclosure.
Fig. 8 shows a block diagram schematic of a start control device of a range extender according to an embodiment of the present disclosure.
Fig. 9 shows a schematic structural diagram of an extended range electric vehicle according to an embodiment of the present disclosure.
Detailed Description
The safety control method and device of the range extender and the electric vehicle according to the invention are explained and explained in detail with reference to the drawings in the specification.
Fig. 1 shows a schematic flow diagram of a method 10 for controlling the start of a range extender according to an embodiment of the disclosure. The starting control method 10 is used for a range-extended electric vehicle, and a range extender of the range-extended electric vehicle comprises an engine and a generator, wherein the engine is directly connected with the generator. The starting control method 10 is used for starting the range extender, the starting of the engine is realized through a driving motor connected with the engine, and the range extender is started, so that the vehicle starts to work in a range extending mode, and the driving range of the vehicle is prolonged.
Referring to fig. 1, the startup control method 10 may include the steps of:
at step S11: so that the starter motor attempts to start the engine at a preset first torque value.
At step S12: in the event of a failure to start the engine at the first torque value, the starter motor is caused to attempt to gradually increase the starting torque to a preset second torque value to start the engine. The second torque value may be set according to the maximum torque that the drive motor can support, the maximum allowable rotation speed of the engine, and the like.
At step S13: in the event of a failure to start the engine at the second torque value, the starter motor is caused to attempt to maintain the second torque value for a first preset time period to start the engine.
At step S14: in the event of a failure to start the engine for a first preset period of time, the starter motor is caused to stop starting due to the failed start.
At step S15: in the case where the starting of the engine by the starter motor at the first torque value or the first torque value is successful, the starter motor is caused to gradually reduce the starting torque to a preset third torque value for a second preset time period. The third torque value may be set according to a torque value that may achieve ignition of the engine under a loaded condition. By reducing the starting torque from the second torque to the third torque, a balance between starting reliability and energy consumption is taken into consideration.
Fig. 2 shows a schematic flow chart of a method 20 for controlling the start of a range extender according to another embodiment of the disclosure. The start control method 20 may further include the step S16 of, based on the method 10, causing the starter motor to stop starting due to a failed start in the case where the starter motor is not able to ignite the engine for more than a second preset time while driving the engine at the third torque value in step S16.
Fig. 3 shows a schematic flow chart of a method 30 for controlling the start of a range extender according to a further embodiment of the disclosure. The startup control method 30 may include the steps of:
at step S31: and the starting motor judges whether the starting torque needs to be gradually reduced to a preset fourth torque value according to a preset starting strategy. The fourth torque value may be set according to a stable operating condition of the drive motor, for example, in case it is detected that the drive motor may be faced with a fault, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque.
At step S32: and when the torque value needs to be reduced to the fourth torque value, the starting motor is stopped due to the failed starting.
Fig. 4 shows a schematic flow chart of a method 40 for controlling the start of a range extender according to a further embodiment of the disclosure. The startup control method 40 may include the steps of:
at step S41: and the starting motor judges whether the starting torque needs to be gradually reduced to a preset fourth torque value according to a preset starting strategy. The fourth torque value may be set according to a stable operation condition of the driving motor or a condition of the driving motor that causes the engine of the range extender to run idle. For example, in the case where it is detected that the drive motor may be faced with a failure, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque. For example, in the case where it is detected that the engine is required to run idle or a related command is received from the vehicle control, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque.
At step S42: and when the torque value needs to be reduced to the fourth torque value, further judging whether the engine needs to run in an idle speed mode according to a preset starting strategy.
At step S43: and when the engine needs to run at the idle speed, driving the engine by the starting motor with the fourth torque value to realize the idle speed running of the engine. Therefore, the engine is successfully ignited, and the power generation instructions such as standby are given; the starter stops starting.
Fig. 5 shows a schematic flow chart of a method 50 for controlling the start of a range extender according to a further embodiment of the disclosure. The startup control method 50 may further include, on the basis of the aforementioned method 40, a step S44 of step S44: and when the engine does not need to run in an idling mode, the starting motor is stopped and started due to failed starting.
Fig. 6 shows a flow diagram of a method 60 for controlling the start of a range extender according to a further embodiment of the disclosure. The startup control method 60 may include the steps of:
at step S61: accumulating the starting times of the starting motor due to the failed starting; and
at step S62: and sending an alarm message when the accumulated number of attempts reaches a preset starting failure threshold value.
According to this embodiment, the accumulated number of attempts may be cleared after the engine ignition is successful.
Fig. 7 shows a flow diagram of a method 70 for controlling the start of a range extender according to a further embodiment of the disclosure. The startup control method 70 may include the steps of:
at step S71: acquiring the ambient temperature of the range extender;
at step S72: the first torque value, the second torque value, and the third torque value are adjusted according to an ambient temperature of the range extender.
Further, the fourth torque value may also be adjusted based on the ambient temperature of the range extender.
In one embodiment, the first torque value, the second torque value, the third torque value, and the fourth torque value in the case where the environment in which the vehicle is located is stable at-30 ℃, -10 ℃, 5 ℃, and 10 ℃ are set in advance, respectively.
Referring to fig. 8, a block diagram schematic of a start control apparatus 80 of a range extender is shown, according to an embodiment of the present disclosure. The start control apparatus 80 is used for a range-extended electric vehicle, and the range extender includes an engine and a generator, the engine is directly connected to the generator, wherein the start of the engine is realized by driving the motor. The start control device 80 may include:
a first torque starting means 811 for causing the starter motor to attempt to start the engine at a preset first torque value.
A second torque starting means 812 for causing the starter motor to attempt to gradually increase the starting torque to a preset second torque value to start the engine in the event of a failure to start the engine at the first torque value. The second torque value may be set according to the maximum torque that the drive motor can support, the maximum allowable rotation speed of the engine, and the like.
A second torque start adjustment means 813 for causing the starter motor to attempt to maintain the second torque value for a first preset time period to start the engine in case of a failure to start the engine at the second torque value.
A first stop-start device 814, for stopping the start of the starter motor due to the failed start-up in case of the failed start-up of the engine lasting for the first preset time period.
A third torque starting means 815 for causing the starter motor to gradually reduce the starting torque to a preset third torque value for a second preset time period in case the starter motor succeeds in starting the engine at the first torque value or the first torque value. The third torque value may be set according to a torque value that may achieve ignition of the engine under a loaded condition. By reducing the starting torque from the second torque to the third torque, a balance between starting reliability and energy consumption is taken into consideration.
Further, the start control device 80 may further include: and the second stop-start device is used for stopping the start of the starting motor due to the failed start under the condition that the ignition of the engine cannot be realized when the starting motor drives the engine by the third torque value for exceeding the second preset time.
Further, the start control device 80 may further include:
and the fourth torque first starting device is used for enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value according to a preset starting strategy. The fourth torque value may be set according to a stable operating condition of the drive motor, for example, in case it is detected that the drive motor may be faced with a fault, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque; and
and the third stop-start device is used for stopping starting the starting motor due to failed starting when the fourth torque value is judged to be required to be reduced.
Further, the start control device 80 may further include:
and the fourth torque second starting device is used for enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value according to a preset starting strategy. The fourth torque value may be set according to a stable operation condition of the driving motor or a condition of the driving motor that causes the engine of the range extender to run idle. For example, in the case where it is detected that the drive motor may be faced with a failure, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque. For example, in the case where it is detected that the engine is required to run idle or a related command from the vehicle control is received, the current torque of the starter motor, for example, the second torque or the third torque, may be reduced to the fourth torque;
a fourth torque start adjustment device: the method is used for further judging whether the engine needs to run in an idle speed mode according to a preset starting strategy when the fact that the engine needs to be reduced to the fourth torque value is judged; and
an idle operation device: and when the engine needs to run at the idle speed, the starting motor drives the engine with the fourth torque value to realize the idle speed running of the engine. Therefore, the engine is successfully ignited, and the power generation instructions such as standby are given; the starter stops starting.
Further, the start control device 80 may further include:
and the fourth stop-start device is used for stopping the start of the starting motor due to the failed start when the engine does not need to run in an idling mode.
Further, the start control device 80 may further include:
the accumulation device is used for accumulating the starting times of the starting motor due to the starting failure; and
and the alarm device is used for sending an alarm message when the accumulated attempt times reach a preset starting failure threshold value.
According to this embodiment, the accumulated number of attempts may be cleared after the engine ignition is successful. According to the embodiment, the range extender can be started by adjusting the torque for multiple times, and an alarm can be given in time when the range extender fails to start.
Further, the start control device 80 may further include:
the temperature acquisition device is used for acquiring the ambient temperature of the range extender; and
and the torque adjusting device is used for adjusting the first torque value, the second torque value, the third torque value and/or the fourth torque according to the ambient temperature of the range extender.
It should be understood that each device or module recited in the activation control device 80 corresponds to each step of the respective method described with reference to fig. 1-7. Thus, the operations and features not specifically described above with respect to fig. 1-7 are equally applicable to the activation control device 80 and the devices or modules contained therein and will not be described in detail herein.
Fig. 9 shows a schematic structural diagram of an extended range electric vehicle 90 according to an embodiment of the present disclosure. As shown, the extended range electric vehicle 90 includes a starter motor 91, a range extender 92, and a vehicle control unit 93, the vehicle control unit 93 is connected to the starter motor 91, the starter motor 91 is connected to the range extender 92, and the vehicle control unit is configured to perform the method according to the foregoing.
The present disclosure provides a computer-readable storage medium comprising computer-executable instructions stored thereon which, when executed by a controller, perform the aforementioned method.
According to the embodiment of the invention, a control scheme capable of enabling the range extender to be started reliably is provided, the ignition success rate of the internal combustion engine can be improved, and the starting reliability can be improved. Further, various torque values are adjusted in consideration of the environmental stability of the electric vehicle, so that the engine can adapt to different temperatures of the engine, and the starting success rate of the range extender is improved.
It should be noted that although in the above detailed description a number of devices or modules are mentioned which are arranged, this division is not mandatory only. Indeed, the features and functionality of two or more of the modules described above may be embodied in one module according to embodiments of the invention. Conversely, the features and functions of one module described above may be further divided into embodiments by a plurality of modules.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor. To this end, embodiments of the present application provide a storage medium, in which a plurality of instructions are stored, where the instructions can be loaded by a processor to execute the steps in any one of the methods for testing an antenna provided in the embodiments of the present application.
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 and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A starting control method of a range extender is used for a range extender electric automobile, the range extender comprises an engine and a generator, the engine is directly connected with the generator, wherein the starting of the engine is realized by a driving motor connected with the engine, and the method is characterized by comprising the following steps:
s11: causing a starter motor to attempt to start the engine at a preset first torque value;
s12: in the event of a failure to start the engine at the first torque value, causing a starter motor to attempt to gradually increase a starting torque to a preset second torque value to start the engine;
s13: in the event of a failure to start the engine at the second torque value, causing a starter motor to attempt to maintain the second torque value for a first preset time period to start the engine;
s14: under the condition that the engine is failed to start continuously for a first preset time period, the starting motor is stopped and started due to the failure of starting; and
s15: under the condition that the starting motor successfully starts the engine at the first torque value or the second torque value, gradually reducing the starting torque to a preset third torque value by the starting motor for a second preset time period;
s16: under the condition that the engine is driven by the starting motor at the third torque value for exceeding the second preset time and ignition of the engine cannot be realized, the starting motor is stopped due to starting failure;
s31: enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value or not according to a preset starting strategy;
s32: and when the torque value needs to be reduced to the fourth torque value, the starting motor is stopped due to the failed starting.
2. The method according to claim 1, characterized in that the method further comprises the step of:
s41: enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value or not according to a preset starting strategy;
s42: when the torque value needs to be reduced to the fourth torque value, further judging whether the engine needs to run in an idle speed mode according to a preset starting strategy; and
s43: and when the engine needs to run at the idle speed, driving the engine by the starting motor at the fourth torque value to realize the idle speed running of the engine.
3. The method according to claim 2, characterized in that the method further comprises the step of:
s44: and when the engine does not need to run in an idling mode, stopping the starting motor due to failed starting.
4. The method according to any one of claims 1-3, further comprising:
s61: accumulating the starting times of the starting motor due to the failed starting; and
s62: and sending an alarm message when the accumulated number of attempts reaches a preset starting failure threshold value.
5. The method according to any one of claims 1-3, further comprising:
s71: acquiring the ambient temperature of the range extender;
s72: adjusting the first, second, and third torque values as a function of an ambient temperature of the range extender.
6. A start control apparatus of a range extender for a range-extended electric vehicle, the range extender comprising an engine and a generator, the engine being directly connected to the generator, wherein starting of the engine is achieved by driving a motor, the apparatus comprising:
a first torque starting device for causing a starter motor to attempt to start the engine at a preset first torque value;
second torque starting means for causing the starter motor to attempt to gradually increase a starting torque to a preset second torque value to start the engine in the event of a failure to start the engine at the first torque value;
second torque start adjustment means for causing a starter motor to attempt to maintain the second torque value for a first preset time period to start the engine in the event of a failure to start the engine at the second torque value;
first stop-start means for stopping the start of the starter motor due to a start failure in the case where the start of the engine fails for a first preset time period; and
third torque starting means for causing the starter motor to gradually reduce the starting torque to a preset third torque value for a second preset time period in a case where starting of the engine by the starter motor at the first torque value or the second torque value is successful;
the second stop-start device is used for stopping the start of the starting motor due to the failed start under the condition that the starting motor drives the engine by the third torque value for exceeding the second preset time and the ignition of the engine still cannot be realized;
the fourth torque first starting device is used for enabling the starting motor to judge whether the starting torque needs to be gradually reduced to a preset fourth torque value according to a preset starting strategy;
and the third stop-start device is used for stopping starting the starting motor due to failed starting when the fourth torque value is judged to be required to be reduced.
7. An extended range electric vehicle comprising a starter motor, a range extender and a vehicle control unit, said vehicle control unit being connected to said starter motor, said starter motor being connected to said range extender, characterized in that said vehicle control unit is configured to perform the method according to any of claims 1-5.
8. A computer-readable storage medium comprising computer-executable instructions stored thereon which, when executed by a controller, perform the method of any one of claims 1-5.
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| CN114592999B (en) * | 2021-03-29 | 2024-03-01 | 长城汽车股份有限公司 | Engine starting method and device, storage medium and electronic equipment |
| CN113415209A (en) * | 2021-07-09 | 2021-09-21 | 山东元齐新动力科技有限公司 | New energy automobile driving endurance mileage prediction method, system, medium and equipment |
| CN114376411B (en) * | 2022-02-15 | 2024-01-12 | 佛山市顺德区美的饮水机制造有限公司 | Control method and device for water treatment device, storage medium and water treatment device |
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