CN115750113A - Control method and device for supercharger overspeed protection, vehicle and storage medium - Google Patents
Control method and device for supercharger overspeed protection, vehicle and storage medium Download PDFInfo
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Abstract
The invention discloses a control method and device for overspeed protection of a supercharger, a vehicle and a storage medium, wherein the method comprises the following steps: when the vehicle engine is started, controlling a waste gas bypass valve connected with a supercharger to be in a full-open state; acquiring a pressurization demand signal, and performing closed-loop pressurization control on the supercharger according to the pressurization demand signal; and acquiring a position voltage signal of the supercharger, controlling the supercharger to exit closed-loop supercharging control and controlling a waste gas bypass valve connected with the supercharger to be in a full-open state when the position voltage signal of the supercharger is lost. From this, when the position voltage signal of booster lost, in time restrict the rotational speed of booster, avoid the booster to take place overspeed broken shaft in the twinkling of an eye, power is lost and the engine oil reveals the scheduling problem to promote the reliability and the security of booster, improve the life of booster.
Description
Technical Field
The invention relates to the technical field of superchargers, in particular to a control method for overspeed protection of a supercharger, a computer-definable storage medium, a control device for overspeed protection of a supercharger and a vehicle.
Background
Along with the development of times, the supercharging Control of the exhaust gas turbocharger is electrically controlled, and an Electronic Control Unit (ECU) is mainly used for controlling a motor of a supercharger actuator to rotate and changing the angle of a pull rod of the actuator, so that the opening degree of a deflation valve is adjusted, the rotating speed of the supercharger is adjusted, the supercharging pressure is controlled, and the performance of an engine is controlled.
However, the related art has a problem that the opening of the bleed valve of the supercharger is usually fed back by using the position voltage, and if the opening of the bleed valve of the supercharger is lost in the process of feeding back the position voltage, the erroneous judgment of the opening of the bleed valve of the supercharger is caused, so that the supercharger is easily subjected to the phenomena of instant overspeed shaft breakage, power loss, engine oil leakage, vehicle acceleration weakness, blue smoke emission and the like, the reliability of the supercharger is reduced, and the service life of the supercharger is shortened.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a control method for overspeed protection of a supercharger, which can limit the rotation speed of the supercharger in time when a voltage signal at a position of the supercharger is lost, and avoid the problems of instantaneous overspeed shaft breakage, power loss, engine oil leakage and the like of the supercharger, thereby improving the reliability and safety of the supercharger and prolonging the service life of the supercharger.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to provide a control device for overspeed protection of a supercharger.
A fourth object of the invention is to propose a vehicle.
In order to achieve the above object, an embodiment of the first aspect of the present invention provides a control method for overspeed protection of a supercharger, including: when the vehicle engine is started, controlling a waste gas bypass valve connected with a supercharger to be in a full-open state; acquiring a supercharging demand signal, and carrying out closed-loop supercharging control on the supercharger according to the supercharging demand signal; and acquiring a position voltage signal of the supercharger, controlling the supercharger to exit the closed-loop supercharging control and controlling the waste gas bypass valve connected with the supercharger to be in a full-open state when the position voltage signal of the supercharger is lost.
According to the control method for the overspeed protection of the supercharger, when an engine of a vehicle is started, the waste gas bypass valve connected with the supercharger can be controlled to be in a full-open state, so that the supercharger is in an idling or small-load state, the closed-loop supercharging control is performed on the supercharger according to the supercharging demand signal after the supercharging demand signal is obtained, the rotating speed and the supercharging pressure of the supercharger are adjusted, the supercharger is controlled to quit the closed-loop supercharging control when the obtained position voltage signal of the supercharger is lost, the waste gas bypass valve connected with the supercharger is controlled to be in the full-open state, the rotating speed of the supercharger is limited in time, the problems that the shaft of the supercharger is broken due to instantaneous overspeed, power is lost, engine oil is leaked and the like are avoided, the reliability and the safety of the supercharger are improved, and the service life of the supercharger is prolonged.
In addition, the control method for the supercharger overspeed protection according to the above embodiment of the present invention may further include the following additional technical features:
according to an embodiment of the invention, said obtaining a boost demand signal comprises: acquiring the change rate of an accelerator pedal; and generating the pressurization demand signal according to the accelerator pedal change rate.
According to one embodiment of the invention, an enhancement demand flag is set according to the supercharging demand signal; acquiring a target opening instruction corresponding to the supercharging demand signal; and performing closed-loop boost control on the supercharger according to the target opening instruction and the position voltage signal of the supercharger.
According to one embodiment of the invention, the closed-loop boost control of the supercharger comprises: and controlling the opening of the waste gate valve connected with the supercharger according to the target opening instruction and the position voltage signal of the supercharger, wherein the position voltage signal of the supercharger and the opening of the waste gate valve are in a negative correlation relationship.
According to one embodiment of the invention, after the overspeed protection control of the supercharger, the method further comprises: acquiring a fault diagnosis result; and controlling the supercharger to carry out closed-loop supercharging control again or controlling the vehicle to send out fault prompt information according to the fault diagnosis result.
According to an embodiment of the invention, the method further comprises: if the position voltage signal of the lost supercharger is not recovered within the preset time, determining that the fault diagnosis result is the supercharger signal fault, and executing the step of controlling the vehicle to send out fault prompt information; and if the position voltage signal of the lost supercharger is recovered within the preset time, determining that the fault diagnosis result is a temporary supercharger signal loss fault, and executing a step of controlling the supercharger to carry out closed-loop supercharging control again.
According to one embodiment of the invention, at start-up of the vehicle engine, the method further comprises: acquiring a vehicle transmission gear; and controlling the opening degree of the waste gas bypass valve connected with the supercharger according to the gear of the vehicle transmission.
In order to achieve the above object, a computer-readable storage medium is provided in an embodiment of a second aspect of the present invention, on which a control program for supercharger overspeed protection is stored, and when the processor executes the control program for supercharger overspeed protection, the control method for supercharger overspeed protection according to the above embodiment of the present invention is implemented.
According to the computer-readable storage medium of the embodiment of the invention, the processor executes the control program of the supercharger overspeed protection stored on the processor, so that the reliability and the safety of the supercharger can be improved, and the service life of the supercharger can be prolonged.
In order to achieve the above object, a control device for overspeed protection of a supercharger according to an embodiment of the present invention is applied to a supercharger, and the control device includes a memory, a processor, and a control program for overspeed protection of the supercharger, which is stored in the memory and is executable on the processor, and when the processor executes the control program for overspeed protection of the supercharger, the control method for overspeed protection of the supercharger according to the embodiment of the present invention is implemented.
According to the control device for the overspeed protection of the supercharger, the processor runs the control program for the overspeed protection of the supercharger stored in the memory, so that the reliability and the safety of the supercharger can be improved, and the service life of the supercharger can be prolonged.
In order to achieve the above object, a vehicle according to a fourth aspect of the present invention includes the control device for supercharger overspeed protection according to the above embodiment of the present invention.
According to the vehicle provided by the embodiment of the invention, the reliability and the safety of the supercharger can be improved and the service life of the supercharger can be prolonged by adopting the control device for the overspeed protection of the supercharger.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block schematic diagram of a supercharger according to one embodiment of the present invention;
FIG. 2 is a flow chart schematic of a control method of supercharger overspeed protection according to an embodiment of the present invention;
FIG. 3 is a block schematic diagram of a control arrangement for supercharger overspeed protection according to an embodiment of the present invention;
FIG. 4 is a block schematic diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A control method of supercharger overspeed protection, a computer-readable storage medium, a control device of supercharger overspeed protection, and a vehicle according to embodiments of the invention will be described below with reference to the drawings.
Before describing the control method of the overspeed protection of the supercharger according to the embodiment of the present invention, a detailed description is first made on a specific structure of the supercharger according to the embodiment of the present invention, specifically, in some embodiments of the present invention, the supercharger may include an electrically controlled turbocharger, and the turbocharger may be applied in an exhaust system of an engine, for example, the turbocharger may be disposed downstream of an exhaust manifold of the engine, wherein, as shown in fig. 1, a waste gate valve is further disposed between the downstream of the exhaust manifold and a turbine end of the turbocharger, the waste gate valve is connected to a waste gate actuator through a pull rod, and the pull rod may be moved by the waste gate actuator to control opening and closing of the waste gate valve through movement of the pull rod, so as to control whether waste gas passes through a turbine of the turbocharger, and thus, the supercharging pressure of the supercharger may be controlled through the size of the opening of the waste gate valve.
It should be understood that, in the prior art, the opening of the wastegate valve of the supercharger is usually fed back by using position voltage, if the opening of the wastegate valve is misjudged due to loss of position voltage signals (for example, a virtual connection occurs in a control circuit of the supercharger or a failure occurs in a signal acquisition module, etc.), it is very easy to cause a wastegate actuator to control the wastegate valve to perform a closing operation through movement of a pull rod, so that the supercharger has the problems of instantaneous overspeed shaft breakage, power loss, oil leakage, etc., in order to solve the above technical problems, embodiments of the present invention provide a control method for supercharger overspeed protection, which can avoid the problems of instantaneous overspeed shaft breakage, power loss, oil leakage, etc. occurring in the supercharger when the position voltage signals of the supercharger are lost, thereby improving reliability and safety of the supercharger and prolonging the service life of the supercharger.
Fig. 2 is a flow chart illustrating a control method of the supercharger overspeed protection according to an embodiment of the present invention.
In some embodiments of the present invention, as shown in fig. 2, a control method for supercharger overspeed protection comprises:
and S101, controlling a waste gas bypass valve connected with a supercharger to be in a full-open state when the vehicle engine is started.
It can be understood that, in this embodiment of the present invention, when the vehicle is powered on and the vehicle engine is started, the engine control unit may control the waste gate actuator to drive the pull rod to move, so that the pull rod drives the waste gate valve connected to the supercharger to be in a fully open state, where the fully open state of the waste gate valve refers to opening the opening of the waste gate valve to a maximum opening, and the supercharger is in an idle or low-load state, so as to reduce energy consumption of the supercharger and wait for a response to a supercharging demand.
And S102, acquiring a pressurization demand signal, and performing closed-loop pressurization control on the supercharger according to the pressurization demand signal.
It can be understood that, in this embodiment of the present invention, the engine control unit may monitor a boost demand signal in the entire vehicle communication network while detecting that the engine is in a start state, and may perform closed-loop boost control on the supercharger according to the obtained boost demand signal, for example, the engine control unit may control the waste gas bypass actuator to drive the pull rod to move the waste gas bypass valve in the closing direction according to the boost demand signal, so as to reduce the opening of the waste gas bypass valve, increase the rotation speed of the supercharger, increase the boost pressure of the supercharger, and increase the air intake amount of the engine, thereby improving the performance of the engine and satisfying the boost demand of the vehicle.
It should be noted that, in some embodiments of the present invention, when the supercharging requirement is reduced or the supercharging requirement signal is eliminated, the engine control unit may further control the waste gas bypass actuator to drive the pull rod to move the waste gas bypass valve in the opening direction, so as to increase the opening degree of the waste gas bypass valve, reduce the rotation speed of the supercharger, reduce the supercharging pressure of the supercharger, and reduce the air intake amount of the engine, thereby reducing the energy consumption of the supercharger, and wait for the response to the next supercharging requirement.
S103, acquiring a position voltage signal of the supercharger, controlling the supercharger to exit closed-loop supercharging control and controlling a waste gas bypass valve connected with the supercharger to be in a full-open state when the position voltage signal of the supercharger is lost.
It can be understood that the engine control unit may determine the opening degree of the wastegate valve according to the position voltage signal of the supercharger, at this time, if the position voltage signal of the supercharger is lost during the closed-loop supercharging control of the supercharger, the engine control unit may make a false determination on the on-off state of the wastegate valve, and further control the wastegate actuator to drive the pull rod to move the wastegate valve in a wrong direction, so that the supercharger may generate an unexpected speed increase, causing the overspeed runaway of the supercharger.
It should be noted that, when the wastegate valve connected to the supercharger is in the fully open state, the position voltage signal of the corresponding supercharger is 0.4V, at this time, if the position voltage signal of the supercharger is lost (i.e. the position voltage signal of the supercharger suddenly changes from 0.4V to 0V), during the period from the signal loss to the fault determination, if the engine control unit still performs closed-loop supercharging control, the wastegate valve is controlled to move in the fully closed direction, so that the supercharger overspeed phenomenon is easily generated.
Further, in some embodiments of the present invention, obtaining the boost demand signal comprises: and acquiring the change rate of the accelerator pedal, and generating a pressurization demand signal according to the change rate of the accelerator pedal.
It can be understood that, in this embodiment of the present invention, whether the driver has a supercharging requirement may be determined by the accelerator pedal change rate, for example, if the accelerator pedal change rate is greater than a preset change rate threshold, it may be determined that the driver has the supercharging requirement, and a supercharging requirement signal is generated, at this time, the engine control unit may perform closed-loop supercharging control on the supercharger according to the supercharging requirement signal, so as to meet the supercharging requirement of the driver, and if the accelerator pedal change rate is less than or equal to the preset change rate threshold, it may be determined that the driver has no supercharging requirement, at this time, the engine control unit may control the opening degree of the wastegate valve to remain unchanged, so as to ensure the stability of the supercharger.
Further, in some embodiments of the present invention, closed-loop boost control of a supercharger according to a boost demand signal includes: setting an enhancement demand flag bit according to a supercharging demand signal, acquiring a target opening instruction corresponding to the supercharging demand signal, and performing closed-loop supercharging control on the supercharger according to the target opening instruction and a position voltage signal of the supercharger.
It can be understood that, in this embodiment of the present invention, after the engine control unit monitors the supercharging requirement signal, the supercharging requirement flag may be set, for example, the boosting requirement flag is changed from false to true, where after the supercharging requirement flag is set, the engine control unit may obtain a target opening command corresponding to the supercharging requirement signal, so as to perform closed-loop supercharging on the supercharger according to the target opening command and the position voltage signal of the supercharger, and adjust the rotation speed and the supercharging pressure of the supercharger, so as to meet the supercharging requirement.
Further, in some embodiments of the present invention, closed-loop boost control of a supercharger comprises: and controlling the opening of a waste gas bypass valve connected with the supercharger according to the target opening command and a position voltage signal of the supercharger, wherein the position voltage signal of the supercharger and the opening of the waste gas bypass valve are in a negative correlation relationship.
It is understood that, in this embodiment of the present invention, the target opening command may be used to indicate the opening that the wastegate valve needs to reach, and the position voltage signal of the supercharger may be used to indicate the current opening of the wastegate valve, so that the opening of the wastegate valve connected to the supercharger may be controlled according to the target opening command and the position voltage signal of the supercharger, so that the current opening of the wastegate valve matches the opening that the wastegate valve needs to reach, thereby implementing closed-loop boost control of the supercharger, wherein the smaller the position voltage signal of the supercharger is, the larger the opening of the wastegate valve connected to the supercharger is, and conversely, the larger the position voltage signal of the supercharger is, the smaller the opening of the wastegate valve connected to the supercharger is.
Further, in some embodiments of the present invention, after the overspeed protection control of the supercharger, the method further comprises: and acquiring a fault diagnosis result, and controlling the supercharger to carry out closed-loop supercharging control again or controlling the vehicle to send fault prompt information according to the fault diagnosis result.
It can be understood that, in this embodiment of the present invention, after the overspeed protection control is performed on the supercharger, the supercharger may also be subjected to fault diagnosis, so as to control the supercharger to perform closed-loop supercharging control again according to the fault diagnosis result, so as to meet the supercharging requirement of the vehicle, or the vehicle may be controlled to send out a fault prompt message, so as to prompt a driver and an occupant to detect and repair the state of the supercharger.
Further, in some embodiments of the present invention, the control method of the supercharger overspeed protection further includes: if the position voltage signal of the lost supercharger is not recovered within the preset time, determining that the fault diagnosis result is the supercharger signal fault, and executing the step of controlling the vehicle to send out fault prompt information, and if the position voltage signal of the lost supercharger is recovered within the preset time, determining that the fault diagnosis result is the supercharger signal temporary loss fault, and executing the step of controlling the supercharger to carry out closed-loop supercharging control again.
For example, in this embodiment of the present invention, within a preset time (e.g., 1 second) after controlling the supercharger to exit the closed-loop boost control and controlling the waste gate valve connected to the supercharger to be in the fully open state, if the position voltage signal of the supercharger is restored again, it may be determined that the fault diagnosis result is a temporary loss fault of the supercharger signal, and the supercharger may be controlled to perform the closed-loop boost control again, so as to meet the vehicle boost requirement, or within a preset time (e.g., 1 second) after controlling the supercharger to exit the closed-loop boost control and controlling the waste gate valve connected to the supercharger to be in the fully open state, if the position voltage signal of the supercharger is continuously lost (i.e., the position voltage signal of the supercharger is always 0V), it may be determined that the fault diagnosis result is a supercharger signal fault, and the vehicle may be controlled to send a fault notification message, so that a service person may detect and maintain the line in time.
Further, in some embodiments of the invention, when the vehicle engine is started, the method further comprises: and acquiring a vehicle transmission gear, and controlling the opening of a waste gas bypass valve connected with the supercharger according to the vehicle transmission gear.
It can be understood that, in this embodiment of the present invention, when the engine control unit detects that the gear of the vehicle transmission is in the D gear, the vehicle may be considered to be in a normal driving state, at this time, the supercharging requirement signal may be obtained, and the closed-loop supercharging control may be performed on the supercharger according to the supercharging requirement signal, and when the engine control unit detects that the gear of the vehicle transmission is in the P gear or the N gear, the vehicle may be considered to be in an idle stationary state, and at this time, the current opening degree of the waste gate valve connected to the supercharger may be kept unchanged, so as to effectively avoid noise generated due to the action of the pull rod under the idle condition, and simultaneously effectively slow down the wear and aging degree of relevant components, which is beneficial to improve the service life of the supercharger, reduce the design cost of the supercharger, and reduce the occurrence of related market faults.
In summary, according to the control method for overspeed protection of a supercharger in the embodiments of the present invention, when an engine of a vehicle is started, a waste gate valve connected to the supercharger may be controlled to be in a fully open state, so that the supercharger is in an idle state or a low load state, and then after a supercharging demand signal is obtained, closed-loop supercharging control is performed on the supercharger according to the supercharging demand signal to adjust the rotation speed and supercharging pressure of the supercharger, and when the obtained position voltage signal of the supercharger is lost, the supercharger is controlled to exit the closed-loop supercharging control, and the waste gate valve connected to the supercharger is controlled to be in a fully open state to limit the rotation speed of the supercharger in time, thereby avoiding the problems of instantaneous overspeed shaft breakage, power loss, engine oil leakage, and the like of the supercharger, and thus improving reliability and safety of the supercharger and prolonging the service life of the supercharger.
Based on the control method of the supercharger overspeed protection in the foregoing embodiment of the present invention, an embodiment of the present invention further provides a computer-readable storage medium, on which a control program of the supercharger overspeed protection is stored, and a processor implements the control method of the supercharger overspeed protection in the foregoing embodiment of the present invention when executing the control program of the supercharger overspeed protection.
It should be noted that the specific implementation manner of the computer-readable storage medium according to the embodiment of the present invention corresponds to the specific implementation manner of the control method for overspeed protection of a supercharger according to the foregoing embodiment of the present invention, and details are not described herein again to reduce redundancy.
In summary, according to the computer-readable storage medium of the embodiment of the invention, the processor executes the control program of the supercharger overspeed protection stored thereon, so that the reliability and the safety of the supercharger can be improved, and the service life of the supercharger can be prolonged.
Based on the control method of the supercharger overspeed protection according to the foregoing embodiment of the present invention, the embodiment of the present invention further provides a control device of the supercharger overspeed protection, wherein as shown in fig. 3, the control device 100 of the supercharger overspeed protection includes a memory 101, a processor 102, and a control program of the supercharger overspeed protection that is stored in the memory 101 and is executable on the processor 102, and when the processor 102 executes the control program of the supercharger overspeed protection, the control method of the supercharger overspeed protection according to the foregoing embodiment of the present invention is implemented.
It should be noted that the specific implementation manners of the control device for supercharger overspeed protection according to the embodiments of the present invention correspond to the specific implementation manners of the control method for supercharger overspeed protection according to the embodiments of the present invention, and are not described herein again to reduce redundancy.
In summary, according to the control device for supercharger overspeed protection in the embodiment of the present invention, the processor runs the control program for supercharger overspeed protection stored in the memory, so as to improve the reliability and safety of the supercharger and prolong the service life of the supercharger.
FIG. 4 is a block schematic diagram of a vehicle according to an embodiment of the invention.
Specifically, as shown in fig. 4, in some embodiments of the present invention, the vehicle 1000 includes the supercharger overspeed protection control apparatus 100 of the foregoing embodiments of the present invention.
It should be noted that the specific implementation of the vehicle 1000 according to the embodiment of the present invention corresponds to the specific implementation of the control method for protecting the overspeed of the supercharger according to the foregoing embodiment of the present invention, and details are not described herein again to reduce redundancy.
In conclusion, according to the vehicle provided by the embodiment of the invention, the reliability and the safety of the supercharger can be improved and the service life of the supercharger can be prolonged by adopting the control device for the supercharger overspeed protection.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A control method of supercharger overspeed protection, the method comprising:
when the vehicle engine is started, controlling a waste gas bypass valve connected with a supercharger to be in a full-open state;
acquiring a pressurization demand signal, and performing closed-loop pressurization control on the supercharger according to the pressurization demand signal;
and acquiring a position voltage signal of the supercharger, controlling the supercharger to exit the closed-loop supercharging control and controlling the waste gas bypass valve connected with the supercharger to be in a full-open state when the position voltage signal of the supercharger is lost.
2. The control method of supercharger overspeed protection according to claim 1, wherein said obtaining a boost demand signal comprises:
acquiring the change rate of an accelerator pedal;
and generating the pressurization demand signal according to the accelerator pedal change rate.
3. The control method of supercharger overspeed protection according to claim 1, wherein said closed-loop boost control of said supercharger in accordance with said boost demand signal comprises:
setting an enhancement demand flag bit according to the supercharging demand signal;
acquiring a target opening instruction corresponding to the supercharging demand signal;
and performing closed-loop boost control on the supercharger according to the target opening instruction and the position voltage signal of the supercharger.
4. The control method of supercharger overspeed protection according to claim 3, wherein said closed-loop boost control of said supercharger comprises:
and controlling the opening of the waste gate valve connected with the supercharger according to the target opening instruction and the position voltage signal of the supercharger, wherein the position voltage signal of the supercharger and the opening of the waste gate valve are in a negative correlation relationship.
5. The supercharger overspeed protection control method according to claim 1, characterized by further comprising, after the overspeed protection control of the supercharger:
acquiring a fault diagnosis result;
and controlling the supercharger to carry out closed-loop supercharging control again or controlling the vehicle to send out fault prompt information according to the fault diagnosis result.
6. The control method of supercharger overspeed protection according to claim 5, further comprising:
if the position voltage signal of the lost supercharger is not recovered within the preset time, determining that the fault diagnosis result is the supercharger signal fault, and executing the step of controlling the vehicle to send out fault prompt information;
and if the position voltage signal of the lost supercharger is recovered within the preset time, determining that the fault diagnosis result is a temporary supercharger signal loss fault, and executing a step of controlling the supercharger to carry out closed-loop supercharging control again.
7. The control method of supercharger overspeed protection according to claim 1, characterized in that at the time of starting of the vehicle engine, the method further comprises:
acquiring a vehicle transmission gear;
and controlling the opening degree of the waste gas bypass valve connected with the supercharger according to the gear of the vehicle transmission.
8. A computer-readable storage medium, on which a control program of supercharger overspeed protection is stored, which when executed by a processor implements a control method of supercharger overspeed protection according to any one of claims 1 to 7.
9. A control device for supercharger overspeed protection, which is applied to a supercharger, and comprises a memory, a processor and a supercharger overspeed protection control program stored in the memory and operable on the processor, wherein the processor implements the supercharger overspeed protection control method according to any one of claims 1 to 7 when executing the supercharger overspeed protection control program.
10. A vehicle characterized by comprising the control apparatus of supercharger overspeed protection according to claim 9.
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| CN202211492817.6A CN115750113B (en) | 2022-11-25 | 2022-11-25 | Supercharger overspeed protection control method, supercharger overspeed protection control device, vehicle and storage medium |
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| CN202211492817.6A CN115750113B (en) | 2022-11-25 | 2022-11-25 | Supercharger overspeed protection control method, supercharger overspeed protection control device, vehicle and storage medium |
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| EP2489850A1 (en) * | 2011-02-21 | 2012-08-22 | Ford Global Technologies, LLC | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement |
| JP2015001170A (en) * | 2013-06-13 | 2015-01-05 | 日立オートモティブシステムズ株式会社 | Supercharging pressure control device of internal combustion engine |
| CN109611193A (en) * | 2018-10-23 | 2019-04-12 | 航天时代飞鸿技术有限公司 | A kind of small-sized aviation piston two-stroke turbocharged engine control method |
| CN115263534A (en) * | 2022-08-01 | 2022-11-01 | 长城汽车股份有限公司 | Control method and control device for turbocharger, electronic device, and storage medium |
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| EP2489850A1 (en) * | 2011-02-21 | 2012-08-22 | Ford Global Technologies, LLC | Method for operating a turbocharger arrangement and control unit for a turbocharger arrangement |
| JP2015001170A (en) * | 2013-06-13 | 2015-01-05 | 日立オートモティブシステムズ株式会社 | Supercharging pressure control device of internal combustion engine |
| CN109611193A (en) * | 2018-10-23 | 2019-04-12 | 航天时代飞鸿技术有限公司 | A kind of small-sized aviation piston two-stroke turbocharged engine control method |
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