CN109185001B - Electric quantity distribution method and device in starting process of engine - Google Patents

Electric quantity distribution method and device in starting process of engine Download PDF

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Publication number
CN109185001B
CN109185001B CN201811139209.0A CN201811139209A CN109185001B CN 109185001 B CN109185001 B CN 109185001B CN 201811139209 A CN201811139209 A CN 201811139209A CN 109185001 B CN109185001 B CN 109185001B
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Prior art keywords
engine
set value
electric
battery voltage
rotating speed
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CN109185001A (en
Inventor
吕宪勇
宋炳雨
常铖
鹿雪文
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN201811139209.0A priority Critical patent/CN109185001B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N11/0862Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N11/0814Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N11/087Details of the switching means in starting circuits, e.g. relays or electronic switches
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/10Safety devices
    • F02N11/108Safety devices for diagnosis of the starter or its components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N2011/0881Components of the circuit not provided for by previous groups

Abstract

The application discloses an electric quantity distribution method and device in an engine starting process. In the process, if the battery electric quantity is high, the electric accessories are gradually started according to the priority, if the battery voltage is low, the electric accessories are closed, and after the engine is successfully started, the electric accessory driving is continuously started. The method and the device perform electric quantity distribution management on the electricity consumption parts in the preparation stage and the starting stage of the engine starting, and avoid starting failure caused by excessive electricity consumption.

Description

Electric quantity distribution method and device in starting process of engine
Technical Field
The invention relates to an engine starting technology, in particular to an electric quantity distribution method and device in an engine starting process.
Background
The engine is a device for providing power for various vehicles and large industrial mechanical equipment, has a wide application range, and plays an irreplaceable important role in practical application.
Key components of the engine include a starter, fuel injectors and a fuel metering valve. With the continuous development of engine technology and the continuous improvement of functional effects, more and more electric accessories of the engine are provided. Such as a fuel pre-feeding pump, a fuel electric heater, an engine oil pre-feeding pump, an air inlet heating grid and the like. Because the key components of the engine and the electric accessories need to be powered by the storage battery in the starting process of the engine, the components work simultaneously to consume large electric quantity on the storage battery in the starting process, and the storage battery voltage is possibly too low, the energy of the starter is insufficient, and the starting fails.
Disclosure of Invention
In view of this, the present invention provides an electric quantity distribution method and device for an engine starting process, so as to overcome the problem of the prior art that a starting failure is caused by too low battery voltage in the engine starting process.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of allocating electric power during an engine start, comprising:
s1: detecting whether the current rotating speed of the engine exceeds a rotating speed preset value, if so, entering S5; if not, the process goes to S2;
s2: judging whether the battery voltage is lower than a first set value, if so, returning to the step S1; if not, go to step S3;
s3: gradually starting each electric accessory drive from top to bottom according to the preset priority of each electric accessory;
s4: judging whether all the electric accessories are driven or not, if so, finishing, and if not, returning to the step S1;
s5: controlling to start the driving of the key component;
s6: judging whether the engine is started successfully or not, if so, entering step S3, and if not, entering step S7;
s7: judging whether the battery voltage is lower than a second set value, if so, entering the step S8; if not, go to step S3;
s8: the electric accessory drive is turned off, and the process returns to step S6.
Optionally, when the determination result in step S4 is negative, the method further includes:
step X1: judging whether the battery voltage is lower than a third set value, if so, entering a step X2; if not, returning to the step S3;
step X2: the electric accessory drive currently in the drive state and having the lowest priority is turned off, and the process returns to step S1.
Optionally, the third setting value is smaller than the first setting value.
Optionally, the key components include a starter, a fuel injector and a fuel metering valve.
Optionally, the electric accessory comprises a fuel oil pre-feeding pump, a fuel oil electric heater, an engine oil pre-feeding pump and an air inlet heating grid.
An electric quantity distribution device during an engine starting process, comprising:
the rotating speed detection module is used for detecting whether the current rotating speed of the engine exceeds a rotating speed preset value;
the voltage judging module is used for judging whether the battery voltage is lower than a first set value or not when the current rotating speed of the engine does not exceed the rotating speed preset value;
the electric accessory drive control module is used for gradually starting each electric accessory drive from top to bottom according to the preset priority of each electric accessory when the battery voltage is not lower than the first set value;
the drive judging module is used for judging whether all the electric accessories are driven or not;
the key component drive control module is used for controlling and starting the key component drive when the current rotating speed of the engine exceeds the rotating speed preset value;
the starting judgment module is used for judging whether the engine is started successfully or not;
the voltage judging module is further used for judging whether the battery voltage is lower than a second set value or not when the engine is not started successfully;
and the drive closing module is used for closing the electric accessory drive when the battery voltage is lower than the second set value.
Optionally, the voltage determining module is further configured to determine whether the battery voltage is lower than a third set value when the driving determining module determines that all the electric accessories are not driven;
the drive shutdown module is further to: and when the battery voltage is lower than the third set value, closing the electric accessory drive with the lowest priority in the current drive state.
Optionally, the third setting value is smaller than the first setting value.
Optionally, the key components include a starter, a fuel injector and a fuel metering valve.
Optionally, the electric accessory comprises a fuel oil pre-feeding pump, a fuel oil electric heater, an engine oil pre-feeding pump and an air inlet heating grid.
According to the technical scheme, compared with the prior art, the embodiment of the invention discloses an electric quantity distribution method and device for the starting process of an engine. In the process, if the battery electric quantity is high, the electric accessories are gradually started according to the priority, if the battery voltage is low, the electric accessories are closed, and after the engine is successfully started, the electric accessory driving is continuously started. The method and the device perform electric quantity distribution management on the electricity consumption parts in the preparation stage and the starting stage of the engine starting, and avoid starting failure caused by excessive electricity consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart of a method for allocating electric power during an engine start according to an embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating another method for allocating electric power during engine starting according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of an electric quantity distribution device in an engine starting process according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of an electric quantity distribution method in an engine starting process according to an embodiment of the present invention, and referring to fig. 1, the electric quantity distribution method in the engine starting process may include:
s1: detecting whether the current rotating speed of the engine exceeds a rotating speed preset value, if so, entering S5; if not, the process proceeds to S2.
Step S1 is for judging whether the cranking is in the starting preparation stage or the starting stage. In the embodiment, the starting stage is performed when the current rotating speed of the engine exceeds the rotating speed preset value, and the starting preparation stage is performed when the current rotating speed of the engine does not exceed the rotating speed preset value.
S2: judging whether the battery voltage is lower than a first set value, if so, returning to the step S1; if not, the process proceeds to step S3.
In the preparation stage of starting the engine, the key component of the engine does not need to start the drive, and the electric accessory drive can be started under the control of the condition. In this embodiment, the condition for controlling the turning on of the electric accessory drive is to first determine whether the battery voltage is greater than or equal to a first set value.
S3: and gradually starting the drive of each electric accessory from top to bottom according to the preset priority of each electric accessory.
If the battery voltage is not lower than the first set value in the starting preparation stage, the driving of each electric accessory can be controlled to be started step by step from top to bottom according to the preset priority of each electric accessory. Different electric accessories have different priority levels, and can be set according to the requirements of actual application scenes.
S4: and judging whether all the electric accessories are started to be driven, if so, finishing, and if not, returning to the step S1.
After the electric accessory drive is started, whether all the electric accessories are started or not can be judged periodically or after one electric accessory drive is started successfully each time.
If not, the process may return to step S1.
S5: and controlling to start the driving of the key part.
When the current rotating speed of the engine exceeds the rotating speed preset value, the system can control the starting of the key component drive in the starting stage.
S6: and judging whether the engine is started successfully, if so, entering step S3, otherwise, entering step S7.
Whether the engine is started successfully may be determined periodically or based on other conditions. If the engine is started successfully, the electric accessory drive function can be continuously started.
S7: judging whether the battery voltage is lower than a second set value, if so, entering the step S8; if not, the flow proceeds to step S3.
If the engine is not started successfully, whether the battery voltage is lower than a second set value or not can be further judged so as to determine the follow-up control operation according to the judgment result.
S8: the electric accessory drive is turned off, and the process returns to step S6.
If the engine has not been successfully started and the battery voltage is less than the second set point, the electric accessory drive may be controlled to be turned off so that the engine has sufficient charge to complete the start.
In the embodiment, whether the engine is in a starting state or a starting preparation stage is judged according to the rotating speed of the engine, if the engine is in the starting preparation stage, the next action is judged according to the voltage of the battery, if the electric quantity of the battery is large, the electric accessories are started according to a set priority sequence, and if the engine starts to start, the driving of key parts is started. In the process, if the battery electric quantity is high, the electric accessories are gradually started according to the priority, if the battery voltage is low, the electric accessories are closed, and after the engine is successfully started, the electric accessory driving is continuously started. The method performs electric quantity distribution management on the electricity consumption parts in the preparation stage and the starting stage of the engine starting, and avoids starting failure caused by excessive electricity consumption.
Fig. 2 is a flowchart of another method for distributing electric energy during an engine starting process according to an embodiment of the present invention, and referring to fig. 2, the method for distributing electric energy during the engine starting process may include:
s1: detecting whether the current rotating speed of the engine exceeds a rotating speed preset value, if so, entering S7; if not, the process proceeds to S2.
S2: judging whether the battery voltage is lower than a first set value, if so, returning to the step S1; if not, the process proceeds to step S3.
S3: and gradually starting the drive of each electric accessory from top to bottom according to the preset priority of each electric accessory.
S4: judging whether all the electric accessories are started to be driven or not, if so, finishing; if not, go to step X1.
X1: judging whether the battery voltage is lower than a third set value, if so, entering a step X2; if not, the process returns to step S3.
If not all the electric accessories are started to be driven, whether the battery voltage is lower than a second set value can be further judged.
X2: the electric accessory drive currently in the drive state and having the lowest priority is turned off, and the process returns to step S1.
And if the current battery voltage is lower than the third set value, the electric accessory drive with the lowest priority in the current drive state is closed, so that the system voltage can be kept at a higher level, and the normal operation of the system is maintained.
S5: controlling to start the driving of the key component;
s6: judging whether the starting of the engines is successful, if so, entering step S3, otherwise, entering step S7;
s7: judging whether the battery voltage is lower than a second set value, if so, entering the step S8; if not, go to step S3;
s8: the electric accessory drive is turned off, and the process returns to step S6.
In the embodiment, when the engine is in a starting preparation stage, the next action is judged according to the battery voltage, if the battery electric quantity is large, namely the battery voltage is not lower than a first set value, the electric accessory drive is started according to the priority sequence, and if the battery voltage is low in the process, namely the battery voltage is lower than a third set value, the electric accessory drive with the low priority is closed, so that the system voltage is not too low, and the normal operation of the system is ensured.
In the above embodiment, the third setting value is smaller than the first setting value.
In the above embodiments, the key components may include, but are not limited to, a starter, an injector, and a fuel metering valve.
In the above embodiments, the electric-powered accessories may include, but are not limited to, a fuel pre-feed pump, a fuel electric heater, an oil pre-feed pump, and an intake grill.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The method is described in detail in the embodiments disclosed above, and the method of the present invention can be implemented by various types of apparatuses, so that the present invention also discloses an apparatus, and the following detailed description will be given of specific embodiments.
Fig. 3 is a schematic structural diagram of an electric quantity distribution device for an engine starting process according to an embodiment of the present invention, and referring to fig. 3, the electric quantity distribution device 30 for the engine starting process may include:
and the rotating speed detection module 301 is used for detecting whether the current rotating speed of the engine exceeds a rotating speed preset value.
The rotation speed detection module 301 is for determining whether the start is in a start preparation phase or a start phase. In the embodiment, the starting stage is performed when the current rotating speed of the engine exceeds the rotating speed preset value, and the starting preparation stage is performed when the current rotating speed of the engine does not exceed the rotating speed preset value.
The voltage determining module 302 is configured to determine whether the battery voltage is lower than a first set value when the current engine speed does not exceed the preset engine speed.
In the preparation stage of starting the engine, the key component of the engine does not need to start the drive, and the electric accessory drive can be started under the control of the condition. In this embodiment, the condition for controlling the turning on of the electric accessory drive is to first determine whether the battery voltage is greater than or equal to a first set value.
And the electric accessory drive control module 303 is configured to gradually start each electric accessory drive from top to bottom according to a preset priority of each electric accessory when the battery voltage is not lower than the first set value.
If the battery voltage is not lower than the first set value in the starting preparation stage, the driving of each electric accessory can be controlled to be started step by step from top to bottom according to the preset priority of each electric accessory. Different electric accessories have different priority levels, and can be set according to the requirements of actual application scenes.
And the driving judging module 304 is used for judging whether all the electric accessories are driven.
After the electric accessory drive is started, whether all the electric accessories are started or not can be judged periodically or after one electric accessory drive is started successfully each time.
If the determination result of the driving determination module 304 is negative, the rotation speed detection module 301 may restart the detection.
And the key component drive control module 305 is used for controlling to start the key component drive when the current rotating speed of the engine exceeds the rotating speed preset value.
When the current rotating speed of the engine exceeds the rotating speed preset value, the system can control the starting of the key component drive in the starting stage.
And a start judging module 306 for judging whether the engine is started successfully.
Whether the engine is started successfully may be determined periodically or based on other conditions. If the engine is started successfully, the electric accessory drive function can be continuously started.
The voltage determination module 302 is further configured to determine whether the battery voltage is lower than a second set value when the engine start is not successful.
If the engine is not started successfully, whether the battery voltage is lower than a second set value or not can be further judged so as to determine the follow-up control operation according to the judgment result.
The drive shutdown module 307 shuts down the power accessory drive when the battery voltage is below the second set point.
If the engine has not been successfully started and the battery voltage is less than the second set point, the electric accessory drive may be controlled to be turned off so that the engine has sufficient charge to complete the start.
In the embodiment, whether the engine is in a starting state or a starting preparation stage is judged according to the rotating speed of the engine, if the engine is in the starting preparation stage, the next action is judged according to the voltage of the battery, if the electric quantity of the battery is large, the electric accessories are started according to a set priority sequence, and if the engine starts to start, the driving of key parts is started. In the process, if the battery electric quantity is high, the electric accessories are gradually started according to the priority, if the battery voltage is low, the electric accessories are closed, and after the engine is successfully started, the electric accessory driving is continuously started. The method performs electric quantity distribution management on the electricity consumption parts in the preparation stage and the starting stage of the engine starting, and avoids starting failure caused by excessive electricity consumption.
In another embodiment, the implementation of the electric quantity distribution device for the engine starting process may include:
and the rotating speed detection module 301 is used for detecting whether the current rotating speed of the engine exceeds a rotating speed preset value.
The voltage determining module 302 is configured to determine whether the battery voltage is lower than a first set value when the current engine speed does not exceed the preset engine speed.
And the electric accessory drive control module 303 is configured to gradually start each electric accessory drive from top to bottom according to a preset priority of each electric accessory when the battery voltage is not lower than the first set value.
And the driving judging module 304 is used for judging whether all the electric accessories are driven.
The voltage determining module 302 is further configured to determine whether the battery voltage is lower than a third set value when the driving determining module determines that all the electric accessories are not driven.
If not all the electric accessories are started to be driven, whether the battery voltage is lower than a second set value can be further judged.
And a driving shutdown module 307, configured to shutdown the electric accessory driving currently in the driving state and having the lowest priority when the battery voltage is lower than the third set value.
And if the current battery voltage is lower than the third set value, the electric accessory drive with the lowest priority in the current drive state is closed, so that the system voltage can be kept at a higher level, and the normal operation of the system is maintained.
If the current battery voltage is not lower than the third set value, the rotation speed detection module 301 may restart the detection.
And the key component drive control module 305 is used for controlling to start the key component drive when the current rotating speed of the engine exceeds the rotating speed preset value.
And a start judging module 306 for judging whether the engine is started successfully.
The voltage determination module 302 is further configured to determine whether the battery voltage is lower than a second set value when the engine start is not successful.
The drive shutdown module 307 is further configured to shut down the power accessory drive when the battery voltage is below the second set point.
In the embodiment, when the engine is in a starting preparation stage, the next action is judged according to the battery voltage, if the battery electric quantity is large, namely the battery voltage is not lower than a first set value, the electric accessory drive is started according to the priority sequence, and if the battery voltage is low in the process, namely the battery voltage is lower than a third set value, the electric accessory drive with the low priority is closed, so that the system voltage is not too low, and the normal operation of the system is ensured.
In the above embodiment, the third setting value is smaller than the first setting value.
In the above embodiments, the key components may include, but are not limited to, a starter, an injector, and a fuel metering valve.
In the above embodiments, the electric-powered accessories may include, but are not limited to, a fuel pre-feed pump, a fuel electric heater, an oil pre-feed pump, and an intake grill.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method of allocating electric power during an engine start, comprising:
s1: detecting whether the current rotating speed of the engine exceeds a rotating speed preset value, if so, entering S5; if not, the process goes to S2;
s2: judging whether the battery voltage is lower than a first set value, if so, returning to the step S1; if not, go to step S3;
s3: gradually starting each electric accessory drive from top to bottom according to the preset priority of each electric accessory;
s4: judging whether all the electric accessories are driven or not, if so, finishing, and if not, returning to the step S1;
s5: controlling to start the driving of the key component;
s6: judging whether the engine is started successfully, if so, entering step S3, otherwise, entering step S7;
s7: judging whether the battery voltage is lower than a second set value, if so, entering the step S8; if not, go to step S3;
s8: the electric accessory drive is turned off, and the process returns to step S6.
2. The method for distributing electric power for the engine starting process according to claim 1, wherein when the determination result of step S4 is no, further comprising:
step X1: judging whether the battery voltage is lower than a third set value, if so, entering a step X2; if not, returning to the step S3;
step X2: the electric accessory drive currently in the drive state and having the lowest priority is turned off, and the process returns to step S1.
3. The method of distributing electric power for the engine starting process according to claim 2, wherein the third set value is smaller than the first set value.
4. The method of apportioning charge for an engine starting process according to claim 1, wherein the critical components include a starter motor, a fuel injector, and a fuel metering valve.
5. The method of claim 1, wherein the electrically powered accessories include a fuel pre-feed pump, an electric fuel heater, an oil pre-feed pump, and an air intake grill.
6. An electric power distribution apparatus during an engine start-up process, comprising:
the rotating speed detection module is used for detecting whether the current rotating speed of the engine exceeds a rotating speed preset value;
the voltage judging module is used for judging whether the battery voltage is lower than a first set value or not when the current rotating speed of the engine does not exceed the rotating speed preset value;
the electric accessory drive control module is used for gradually starting each electric accessory drive from top to bottom according to the preset priority of each electric accessory when the battery voltage is not lower than the first set value;
the drive judging module is used for judging whether all the electric accessories are driven or not;
the key component drive control module is used for controlling and starting the key component drive when the current rotating speed of the engine exceeds the rotating speed preset value;
the starting judging module is used for judging whether the engine is started successfully or not;
the voltage judging module is further used for judging whether the battery voltage is lower than a second set value or not when the engine is not started successfully;
and the drive closing module is used for closing the electric accessory drive when the battery voltage is lower than the second set value.
7. The apparatus for distributing electric power for an engine starting process according to claim 6, wherein said voltage judging module is further configured to judge whether the battery voltage is lower than a third set value when said drive judging module judges that not all of the electric-powered accessories have been driven;
the drive shutdown module is further to: and when the battery voltage is lower than the third set value, closing the electric accessory drive with the lowest priority in the current drive state.
8. The apparatus for distributing electric power for an engine starting process according to claim 7, wherein the third set value is smaller than the first set value.
9. The engine starting process power distribution apparatus according to claim 6, wherein the key components include a starter motor, an oil injector, and an oil amount metering valve.
10. The apparatus for distributing electric power for an engine starting process according to claim 6, wherein said electric accessories include a fuel pre-feed pump, a fuel electric heater, an oil pre-feed pump, and an intake grill.
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