CN111271173B - Control method and control system for electronic supercharger of vehicle - Google Patents
Control method and control system for electronic supercharger of vehicle Download PDFInfo
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- CN111271173B CN111271173B CN202010087157.8A CN202010087157A CN111271173B CN 111271173 B CN111271173 B CN 111271173B CN 202010087157 A CN202010087157 A CN 202010087157A CN 111271173 B CN111271173 B CN 111271173B
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- electronic supercharger
- rotating speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/14—Control of the alternation between or the operation of exhaust drive and other drive of a pump, e.g. dependent on speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B2037/122—Control of rotational speed of the pump
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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
- Y02T10/12—Improving ICE efficiencies
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention provides a control method and a control system for an electronic supercharger of a vehicle, and relates to the field of vehicle engines. The control method comprises the steps of obtaining the electric quantity of a power battery, the current state information of a vehicle and the actual gas pressure information of a turbocharger; generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger; controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction; when the electronic supercharger is in an idling state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idling rotating speed; when the electronic supercharger is in a high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed. The scheme provided by the invention can enable the electronic supercharger to quickly respond to the power demand.
Description
Technical Field
The invention relates to the field of vehicle engines, in particular to a control method and a control system of an electronic supercharger for a vehicle.
Background
In order to achieve vehicle dynamic performance and economy, a turbocharger is usually added in an engine system, but the turbocharger is driven by exhaust gas generated by the engine, so that the exhaust gas quantity is insufficient when the engine rotates at a low speed inevitably, the turbocharger cannot work, after the engine rotates at a high speed, the exhaust gas quantity is increased, the turbocharger starts to work, so that the vehicle power is suddenly improved, and the power response delay phenomenon is not favorable for comfortable and smooth driving experience. In the prior art, in order to eliminate the turbo lag phenomenon, an electronic supercharger is usually added to the turbo charging system. However, in general control logic in the prior art, after the rotation speed of the engine rises, the rotation speed of the electronic supercharger gradually decreases to zero, the electronic supercharger stops working, the electronic supercharger does not rotate at all, the response to the next power is relatively slow, and the driving experience is not favorably improved.
Disclosure of Invention
It is an object of the present invention to provide an electronic supercharger control method that can make an electronic supercharger respond quickly to a power demand.
A further object of the present invention is to provide a control method for an electronic supercharger, which can eliminate the problem of poor connectivity when switching between the electronic supercharger and the turbocharger, and improve driving safety.
In particular, the present invention provides an electronic supercharger control method for a vehicle, comprising:
acquiring the electric quantity of a power battery, the current state information of the vehicle and the actual gas pressure information of a turbocharger;
generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger;
controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction;
when the electronic supercharger is in the idle speed state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idle speed;
when the electronic supercharger is in the high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed.
Optionally, the current state information of the vehicle includes current gear information, engine speed information, accelerator pedal position information, and brake pedal position information.
Optionally, controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the power battery capacity, the current state information of the vehicle and the actual gas pressure information of the turbocharger, including:
and setting the working enabling position of the electronic supercharger to enable the electronic supercharger to be in the high-efficiency working state when the conditions that the electric quantity of the power battery is larger than a first preset value, the current gear information is a forward gear, the position of the brake pedal is in an initial state, the rotating speed of the engine is smaller than a second preset value, the electronic supercharger does not have a working enabling position resetting request and the electronic supercharger does not have a fault are judged to be simultaneously met.
Optionally, after the electronic supercharger is placed in the efficient operating state, the method further includes:
calculating a target rotating speed initial value of the electronic supercharger according to the change value of the position of the accelerator pedal, the engine rotating speed information and the gas pressure information at the air inlet manifold of the engine;
and correcting the initial target rotating speed value when the initial target rotating speed value is judged to be greater than the preset idle rotating speed.
Optionally, modifying the initial target rotation speed value when it is determined that the initial target rotation speed value is greater than the preset idle rotation speed includes:
and correcting the target rotating speed initial value according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the engine rotating speed, the power of the power battery and the power of the electric load.
Optionally, controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, further comprising:
when the electric quantity of the power battery is judged to be smaller than a third preset value, or the opening degree of an accelerator pedal is judged to be smaller than a fourth preset value, or a brake pedal is stepped down, or the value obtained by subtracting the target pressure of gas at an air inlet manifold from the actual gas pressure of the turbocharger is larger than a fifth preset value, the work enabling position of the electronic supercharger is reset, and the electronic supercharger is enabled to be in the idling state;
and calculating the target pressure of the gas at the air inlet manifold according to the change of the position of the accelerator pedal and the engine speed information.
Optionally, after the causing the electronic supercharger to be in the idle state, the method further includes:
calculating to obtain a rotating speed reduction gradient limit value when the electronic supercharger stops working according to the current rotating speed of the electronic supercharger, the rotating speed of the engine and the gas pressure information at the air inlet manifold;
limiting the speed reduction gradient of the electronic supercharger to be smaller than the speed reduction gradient limit value, and calculating the speed reduction rate of the electronic supercharger;
and correcting the current rotating speed of the electronic supercharger when the current rotating speed of the electronic supercharger is judged to be greater than the preset idle rotating speed, and reducing the rotating speed of the electronic supercharger to the preset idle rotating speed according to the rotating speed reduction rate.
Optionally, when it is determined that the current rotation speed of the electronic supercharger is greater than the preset idle rotation speed, modifying the current rotation speed of the electronic supercharger includes:
and correcting the current rotating speed of the electronic supercharger according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the rotating speed of the engine, the power of the power battery and the power of an electric load.
Optionally, the control method further includes:
and after the vehicle stops running, controlling the electronic supercharger to enter a dormant state, wherein the rotating speed of the electronic supercharger is zero.
In particular, the present invention also provides an electronic supercharger control system for a vehicle, comprising:
the acquisition unit is used for acquiring the electric quantity of a power battery, the current state of the vehicle and actual gas pressure information of the turbocharger;
the control unit is connected with the acquisition unit and used for generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger;
the state machine is connected with the control unit and used for controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction;
when the electronic supercharger is in the idle speed state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idle speed;
when the electronic supercharger is in the high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed.
The scheme provided by the invention generates a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and then controls the electronic supercharger to enter an idling state or an efficient working state according to the control instruction. The rotational speed of electron booster when idle state is less than or equal to predetermine the idle rotational speed, compares in prior art electron booster and just no longer pivoted scheme after withdrawing work, can effectively promote electron booster's power responsiveness, and then promotes and drives experience.
Further, when the engine speed rises, the turbocharger starts to work, and the electronic supercharger is controlled to enter an idling state. Specifically, a rotating speed reduction gradient limit value when the electronic supercharger stops working is calculated according to the current rotating speed of the electronic supercharger, the rotating speed of the engine and the gas pressure information at the air inlet manifold, and the rotating speed reduction gradient of the electronic supercharger is limited to be smaller than the rotating speed reduction gradient limit value, so that the rotating speed of the electronic supercharger gradually and slowly reduces. Thus, the problem of poor connection performance when the electronic supercharger and the turbocharger are switched can be effectively solved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a block flow diagram of a control method for an electronic supercharger for a vehicle according to one embodiment of the present disclosure;
fig. 2 is a block flow diagram of a control method of an electronic supercharger for a vehicle according to another embodiment of the invention;
FIG. 3 is a block flow diagram of a control method for an electronic supercharger for a vehicle according to yet another embodiment of the present invention;
fig. 4 is a schematic configuration diagram of a control system of an electronic supercharger for a vehicle according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a block flow diagram of a control method of an electronic supercharger for a vehicle according to one embodiment of the present invention. As shown in fig. 1, the present invention provides an electronic supercharger control method for a vehicle, comprising:
s10: acquiring the electric quantity of a power battery, the current state information of a vehicle and the actual gas pressure information of a turbocharger;
s20: generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger;
s30: controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction;
when the electronic supercharger is in an idling state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idling rotating speed;
when the electronic supercharger is in a high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed.
The scheme provided by the embodiment generates a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and then controls the electronic supercharger to enter an idling state or a high-efficiency working state according to the control instruction. The rotational speed of electron booster when idle state is less than or equal to predetermine the idle rotational speed, compares in prior art electron booster and just no longer pivoted scheme after withdrawing work, can effectively promote electron booster's power responsiveness, and then promotes and drives experience.
Furthermore, the control method considers various factors, such as the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and can further improve the dynamic property of the vehicle, the response rapidity and the driving safety of the vehicle. Especially, factors such as gears and the like are considered in the condition that the electronic supercharger intervenes in work, and the driving safety can be effectively improved.
In a preferred embodiment, the current state information of the vehicle includes current gear information, engine speed information, accelerator pedal position information, and brake pedal position information.
Fig. 2 is a block flow diagram of a control method of an electronic supercharger for a vehicle according to another embodiment of the present invention. As shown in fig. 2, controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the power battery capacity, the current state information of the vehicle and the actual gas pressure information of the turbocharger comprises:
s21: when the conditions that the electric quantity of the power battery is larger than a first preset value, the current gear information is a forward gear, the position of a brake pedal is in an initial state, the rotating speed of an engine is smaller than a second preset value, the electronic supercharger does not have a work enabling position resetting request, and the electronic supercharger does not have a fault are judged, the work enabling position of the electronic supercharger is set, so that the electronic supercharger is in a high-efficiency working state.
As shown in fig. 2, after the electronic supercharger is in the efficient operation state, the method further includes:
s22: calculating a target rotating speed initial value of the electronic supercharger according to the change value of the position of an accelerator pedal, the rotating speed information of the engine and the gas pressure information at the air inlet manifold of the engine;
s23: and correcting the initial value of the target rotating speed when the initial value of the target rotating speed is judged to be larger than the preset idle rotating speed of the electronic supercharger.
Optionally, the modifying the target rotation speed initial value when it is determined that the target rotation speed initial value is greater than the preset idle rotation speed of the electronic supercharger includes:
and correcting the target rotating speed initial value according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the rotating speed of the engine, the power of the power battery and the power of the electric load. Preferably, the initial value of the target rotation speed is corrected by looking up a table corresponding to different factors.
Preferably, in one embodiment, the following steps are used to bring the electronic supercharger into the corresponding operating state: the method comprises the steps of obtaining the electric quantity of a power battery, the current state information of a vehicle and the actual gas pressure information of a turbocharger, wherein the current state information of the vehicle comprises the current gear information, the engine rotating speed information, the accelerator pedal position information and the brake pedal position information. Judging whether the electric quantity of the power battery is larger than a first preset value or not, if so, further judging whether the vehicle is a forward gear or not, if so, further judging whether the vehicle has a braking request or not, if not, further judging whether the engine speed is smaller than a second preset value or not, if so, further judging whether the electronic supercharger has an enabling position resetting request or not, if not, further judging whether the electronic supercharger has a fault or not, and if not, setting the enabling position of the electronic supercharger. Further, if the electric quantity of the power battery is smaller than or equal to a first preset value, or the vehicle is not in a forward gear, or the vehicle has a braking request, or the engine speed is larger than or equal to a second preset value, whether the electronic supercharger is in an enabling position state at the last time is further judged, if the electronic supercharger is in the enabling position state, whether the electronic supercharger has an enabling position resetting request is further judged, if the electronic supercharger does not have the enabling position resetting request, whether the electronic supercharger has a fault is further judged, and if the electronic supercharger does not have the fault, the electronic supercharger is enabled.
And if the electronic supercharger fails, resetting the work enabling position of the electronic supercharger.
Fig. 3 is a block flow diagram of a control method of an electronic supercharger for a vehicle according to still another embodiment of the present invention. As shown in fig. 3, controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, further includes:
s24: and resetting the working enabling position of the electronic supercharger when the electric quantity of the power battery is judged to be smaller than a third preset value or the opening degree of an accelerator pedal is judged to be smaller than a fourth preset value or a brake pedal is stepped down or the value obtained by subtracting the target pressure of gas at the air inlet manifold from the actual gas pressure of the turbocharger is larger than a fifth preset value, so that the electronic supercharger is in an idling state.
The target pressure of the gas at the air inlet manifold is obtained through calculation according to the position change of the accelerator pedal and the engine speed information.
As shown in fig. 3, after the electronic supercharger is in the idle state, the method further includes:
s25: calculating to obtain a rotating speed reduction gradient limit value when the electronic supercharger stops working according to the current rotating speed of the electronic supercharger, the rotating speed of the engine and the gas pressure information at the air inlet manifold;
s26: limiting the speed reduction gradient of the electronic supercharger to be smaller than the speed reduction gradient limit value, and calculating the speed reduction rate of the electronic supercharger;
s27: and correcting the current rotating speed of the electronic supercharger when the current rotating speed of the electronic supercharger is judged to be larger than the preset idle rotating speed of the electronic supercharger, and reducing the rotating speed of the electronic supercharger to the preset idle rotating speed according to the rotating speed reduction rate.
Optionally, the correcting the current rotation speed of the electronic supercharger when the current rotation speed of the electronic supercharger is determined to be greater than the preset idle rotation speed of the electronic supercharger comprises:
and correcting the current rotating speed of the electronic supercharger according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the rotating speed of the engine, the power of the power battery and the power of the electric load.
Under the idling state, the electronic supercharger consumes low energy and has no supercharging effect, but the rapidity of responding to the power demand of a driver can be realized. When the electronic supercharger is in an idle state (particularly when the electronic supercharger is in an idle state from a high-efficiency working state), the rotating speed reduction gradient is limited, so that the rotating speed of the electronic supercharger is reduced to the preset idle rotating speed according to the rotating speed reduction rate. The problem of poor connectivity when the electronic supercharger and the turbocharger are switched can be solved, and driving comfort is achieved.
Preferably, in one embodiment, whether the electric quantity of the power battery is smaller than a third preset value is judged, and if yes, the operation enabling position of the electronic supercharger is reset. And if the electric quantity of the power battery is larger than or equal to a third preset value, judging whether the vehicle has a braking request, and if so, resetting the working enabling position of the electronic supercharger. If the vehicle has no braking request, whether the value obtained by subtracting the target pressure of the gas at the air inlet manifold from the actual gas pressure of the turbocharger is larger than a fifth preset value or not is further judged, and if the value is larger than the fifth preset value, the working enabling position of the electronic supercharger is reset. If the value obtained by subtracting the target pressure of the gas at the inlet manifold from the actual gas pressure of the turbocharger is less than or equal to a fifth preset value, whether the electronic supercharger has a work enabling position setting request is further judged, if the work enabling position request exists, whether the enabling position of the last work of the electronic supercharger is in a reset state is further judged, and if the electronic supercharger is in the reset state, the work enabling position of the electronic supercharger is reset.
Preferably, in one embodiment, the control method further comprises:
and giving an alarm when the electronic supercharger is judged to be in the fault state.
In another preferred embodiment, the control method further includes: and after the vehicle stops running, controlling the electronic supercharger to enter a dormant state, wherein the rotating speed of the electronic supercharger is zero.
In one embodiment, when the vehicle is operated for the first time, the electronic supercharger is controlled to enter an initialization state, and a series of initialization operations such as reading and clearing of relevant data are carried out on the electronic supercharger.
Fig. 4 is a schematic configuration diagram of a control system of an electronic supercharger for a vehicle according to an embodiment of the present invention. As shown in fig. 4, the invention further provides an electronic supercharger control system for a vehicle, which is controlled by the electronic supercharger control method and comprises an acquisition unit 1, a control unit 2 and a state machine 3. The acquisition unit 1 is used for acquiring the electric quantity of the power battery, the current state of the vehicle and the actual gas pressure information of the turbocharger. The control unit 2 is connected with the acquisition unit 1 and used for generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger. The state machine 3 is connected with the control unit 2 and used for controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to a control instruction.
Preferably, the operating state of the electronic supercharger comprises an initialization state, an idle state, an efficient operating state, a sleep state and a fault state.
And when the electronic supercharger is in the initialization state, the electronic supercharger is initialized, and the working enabling position of the electronic supercharger is reset.
When the electronic supercharger is in an idling state, the rotating speed of the electronic supercharger is less than or equal to the preset idling rotating speed, and the work enabling position of the electronic supercharger is reset.
When the electronic supercharger works in a high-efficiency working state, the rotating speed of the electronic supercharger is greater than the preset idling rotating speed, and the working enabling position of the electronic supercharger is set.
When the electronic supercharger is in a dormant state, the rotating speed of the electronic supercharger is zero, and the working enabling position of the electronic supercharger is reset.
The scheme provided by the embodiment generates a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and then controls the electronic supercharger to enter an idling state or a high-efficiency working state according to the control instruction. The rotational speed of electron booster when idle state is less than or equal to predetermine the idle rotational speed, compares in prior art electron booster and just no longer pivoted scheme after withdrawing work, can effectively promote electron booster's power responsiveness, and then promotes and drives experience.
Furthermore, the control method considers various factors, such as the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and can further improve the dynamic property of the vehicle, the response rapidity and the driving safety of the vehicle. Especially, factors such as gears and the like are considered in the condition that the electronic supercharger intervenes in work, and the driving safety can be effectively improved.
The scheme of this embodiment possesses prior art's economic nature, stationarity and travelling comfort, and its idle state can realize the rapidity of power response again, promotes and drives experience. In addition, factors such as gears and the like are considered in the working condition of the electronic supercharger, and the driving safety is improved.
Preferably, in one embodiment, the following steps are used to bring the electronic supercharger into the corresponding operating state: the method comprises the steps of obtaining the electric quantity of a power battery, the current state information of a vehicle and the actual gas pressure information of a turbocharger, wherein the current state information of the vehicle comprises the current gear information, the engine rotating speed information, the accelerator pedal position information and the brake pedal position information. Judging whether the electric quantity of the power battery is larger than a first preset value or not, if so, further judging whether the vehicle is a forward gear or not, if so, further judging whether the vehicle has a braking request or not, if not, further judging whether the engine speed is smaller than a second preset value or not, if so, further judging whether the electronic supercharger has an enabling position resetting request or not, if not, further judging whether the electronic supercharger has a fault or not, and if not, setting the enabling position of the electronic supercharger. Further, if the electric quantity of the power battery is smaller than or equal to a first preset value, or the vehicle is not in a forward gear, or the vehicle has a braking request, or the engine speed is larger than or equal to a second preset value, whether the electronic supercharger is in an enabling position state at the last time is further judged, if the electronic supercharger is in the enabling position state, whether the electronic supercharger has an enabling position resetting request is further judged, if the electronic supercharger does not have the enabling position resetting request, whether the electronic supercharger has a fault is further judged, and if the electronic supercharger does not have the fault, the electronic supercharger is enabled.
And if the electronic supercharger fails, resetting the work enabling position of the electronic supercharger.
Under the idling state, the electronic supercharger consumes low energy and has no supercharging effect, but the rapidity of responding to the power demand of a driver can be realized. When the electronic supercharger is in an idle state (particularly when the electronic supercharger is in an idle state from a high-efficiency working state), the rotating speed reduction gradient is limited, so that the rotating speed of the electronic supercharger is reduced to the preset idle rotating speed according to the rotating speed reduction rate. The problem of poor connectivity when the electronic supercharger and the turbocharger are switched can be solved, and driving comfort is achieved.
Preferably, in one embodiment, whether the electric quantity of the power battery is smaller than a third preset value is judged, and if yes, the operation enabling position of the electronic supercharger is reset. And if the electric quantity of the power battery is larger than or equal to a third preset value, judging whether the vehicle has a braking request, and if so, resetting the working enabling position of the electronic supercharger. If the vehicle has no braking request, whether the value obtained by subtracting the target pressure of the gas at the air inlet manifold from the actual gas pressure of the turbocharger is larger than a fifth preset value or not is further judged, and if the value is larger than the fifth preset value, the working enabling position of the electronic supercharger is reset. If the value obtained by subtracting the target pressure of the gas at the inlet manifold from the actual gas pressure of the turbocharger is less than or equal to a fifth preset value, whether the electronic supercharger has a work enabling position setting request is further judged, if the work enabling position request exists, whether the enabling position of the last work of the electronic supercharger is in a reset state is further judged, and if the electronic supercharger is in the reset state, the work enabling position of the electronic supercharger is reset.
Preferably, the state machine 3 includes five gears respectively corresponding to five working states of the electronic supercharger, and the state machine 3 shifts the corresponding gear according to the control instruction to enable the electronic supercharger to enter the corresponding working state.
In a preferred embodiment, the control system further comprises an alarm unit connected with the control unit 2, the control unit 2 gives out a fault instruction when the electronic supercharger fails, and the alarm unit gives out an alarm according to the fault instruction. Optionally, in one embodiment, the alarm unit comprises a fault light for illuminating upon failure of the electronic supercharger.
Preferably, in one embodiment, the control system further comprises a power battery connected with the electronic supercharger for providing power for the operation of the electronic supercharger. Preferably, the power battery is 48V, the power advantage of the 48V battery pack is fully exerted, the electronic supercharger has a large torque peak value, the dynamic property can be improved, and the technical problem that the electronic supercharger cannot output large torque due to limited power of the storage battery in the prior art is solved.
In other preferred embodiments, the control system is further configured such that after the vehicle stops running, the control unit 2 controls the electronic supercharger to enter a sleep state, and the rotation speed of the electronic supercharger is zero.
In one embodiment, the control system is further configured such that when the vehicle is initially operated, the control unit 2 controls the electronic supercharger to enter an initialization state, and performs a series of initialization operations such as reading and clearing of relevant data on the electronic supercharger.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (8)
1. An electronic supercharger control method for a vehicle, characterized by comprising:
acquiring the electric quantity of a power battery, the current state information of the vehicle and the actual gas pressure information of a turbocharger;
generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger;
controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction;
when the electronic supercharger is in the idle speed state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idle speed;
when the electronic supercharger is in the high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed;
the current state information of the vehicle comprises current gear information, engine rotating speed information, accelerator pedal position information and brake pedal position information;
controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger, wherein the method comprises the following steps:
setting the working enabling position of the electronic supercharger to enable the electronic supercharger to be in the high-efficiency working state when the conditions that the electric quantity of the power battery is larger than a first preset value, the current gear information is a forward gear, the position of the brake pedal is in an initial state, the rotating speed of the engine is smaller than a second preset value, the electronic supercharger does not have a working enabling position resetting request and the electronic supercharger does not have a fault are judged to be met simultaneously;
when the engine speed rises, the turbocharger starts to work, and the electronic supercharger is controlled to enter an idling state.
2. The electronic supercharger control method according to claim 1, further comprising, after placing the electronic supercharger in the efficient operation state:
calculating a target rotating speed initial value of the electronic supercharger according to the change value of the position of the accelerator pedal, the engine rotating speed information and the gas pressure information at the air inlet manifold of the engine;
and correcting the initial target rotating speed value when the initial target rotating speed value is judged to be greater than the preset idle rotating speed.
3. The electronic supercharger control method according to claim 2, wherein correcting the target rotation speed initial value when it is determined that the target rotation speed initial value is greater than the preset idle rotation speed includes:
and correcting the target rotating speed initial value according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the engine rotating speed, the power of the power battery and the power of the electric load.
4. The electronic supercharger control method according to claim 1, wherein the electronic supercharger is controlled to enter an idle state or a high-efficiency operation state according to the power battery capacity, the current state information of the vehicle and the actual gas pressure information of the turbocharger, and further comprising:
when the electric quantity of the power battery is judged to be smaller than a third preset value, or the opening degree of an accelerator pedal is judged to be smaller than a fourth preset value, or a brake pedal is stepped down, or the value obtained by subtracting the target pressure of gas at an air inlet manifold from the actual gas pressure of the turbocharger is larger than a fifth preset value, the work enabling position of the electronic supercharger is reset, and the electronic supercharger is enabled to be in the idling state;
and calculating the target pressure of the gas at the air inlet manifold according to the change of the position of the accelerator pedal and the engine speed information.
5. The electronic supercharger control method according to claim 4, before bringing the electronic supercharger into the idle state, further comprising:
calculating to obtain a rotating speed reduction gradient limit value when the electronic supercharger stops working according to the current rotating speed of the electronic supercharger, the rotating speed of the engine and the gas pressure information at the air inlet manifold;
limiting the speed reduction gradient of the electronic supercharger to be smaller than the speed reduction gradient limit value, and calculating the speed reduction rate of the electronic supercharger;
and correcting the current rotating speed of the electronic supercharger when the current rotating speed of the electronic supercharger is judged to be greater than the preset idle rotating speed, and reducing the rotating speed of the electronic supercharger to the preset idle rotating speed according to the rotating speed reduction rate.
6. The electronic supercharger control method according to claim 5, wherein correcting the current rotation speed of the electronic supercharger when it is determined that the current rotation speed of the electronic supercharger is greater than the preset idle rotation speed includes:
and correcting the current rotating speed of the electronic supercharger according to the gas pressure information at the air inlet manifold, the gas temperature information at the air inlet manifold, the rotating speed of the engine, the power of the power battery and the power of an electric load.
7. The electronic supercharger control method according to claim 1, characterized by further comprising:
and after the vehicle stops running, controlling the electronic supercharger to enter a dormant state, wherein the rotating speed of the electronic supercharger is zero.
8. An electronic supercharger control system for a vehicle, operating by the electronic supercharger control method according to any one of claims 1 to 7, characterized by comprising:
the acquisition unit is used for acquiring the electric quantity of a power battery, the current state of the vehicle and actual gas pressure information of the turbocharger;
the control unit is connected with the acquisition unit and used for generating a corresponding control instruction according to the electric quantity of the power battery, the current state information of the vehicle and the actual gas pressure information of the turbocharger;
the state machine is connected with the control unit and used for controlling the electronic supercharger to enter an idle state or a high-efficiency working state according to the control instruction;
when the electronic supercharger is in the idle speed state, the working enabling position of the electronic supercharger is reset, and the rotating speed of the electronic supercharger is less than or equal to the preset idle speed;
when the electronic supercharger is in the high-efficiency working state, the working enabling position of the electronic supercharger is set, and the rotating speed of the electronic supercharger is greater than the preset idle speed.
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