CN112208358A - Electric automobile control method and device, controller and electric automobile - Google Patents
Electric automobile control method and device, controller and electric automobile Download PDFInfo
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- CN112208358A CN112208358A CN202011156396.0A CN202011156396A CN112208358A CN 112208358 A CN112208358 A CN 112208358A CN 202011156396 A CN202011156396 A CN 202011156396A CN 112208358 A CN112208358 A CN 112208358A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2072—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for drive off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention provides an electric automobile control method, an electric automobile control device, a controller and an electric automobile, wherein the method comprises the following steps: acquiring a logic gear of the electric automobile; when the logic gear is switched from the parking gear to the non-parking gear, acquiring current state information of the electronic parking system; when the current state information of the electronic parking system is in a transition state, setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value; when the current state information of the electronic parking system is a released state, responding to the accelerator opening value from the initial value and responding to the torque request value from the zero torque value. The invention can avoid violent vehicle-crossing or vehicle-collision accidents caused by immediate response to the opening degree of the accelerator pedal and the required value of the torque.
Description
Technical Field
The invention relates to the technical field of electric automobile control, in particular to an electric automobile control method, an electric automobile control device, a controller and an electric automobile.
Background
When the electric automobile is started, comprehensive judgment is needed to be carried out according to the acquired target gear, the brake pedal state signal, the vehicle speed signal and the gear shifting lock state signal to obtain a logic gear, the controller judges the running state of the whole automobile according to the current logic gear, calculates the corresponding required torque, and sends the required torque to the motor for execution after filtering; meanwhile, the controller controls the tightening and releasing of an EPB (electric Park Brake) according to the change condition of the current logic gear.
However, the start control process of the electric vehicle as described above has the following defects: when the logic gear is switched from the parking gear (P gear) to the driving gear (D gear or R gear), the controller requests the EPB to be released, but the release process needs a certain time or the EPB cannot be released in time due to certain faults, if the driver deeply steps on the accelerator pedal at the moment, the automobile violently flees after the EPB is suddenly released, and even the damage and the risk of colliding or hurting people exist.
Disclosure of Invention
The invention aims to provide an electric vehicle control method, an electric vehicle control device, a controller and an electric vehicle, which can solve at least one technical problem mentioned above. The specific scheme is as follows:
according to a specific embodiment of the invention, the invention provides an electric vehicle control method, which comprises the steps of obtaining a logic gear of the electric vehicle; when the logic gear is switched from the parking gear to the non-parking gear, acquiring current state information of the electronic parking system; when the current state information of the electronic parking system is a transition state, setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value, wherein the transition state indicates that the electronic parking system is not released within a preset time, and the zero opening value indicates the opening value of the accelerator pedal when the accelerator pedal is not pressed down; and when the current state information of the electronic parking system is a release state, responding to the accelerator opening value from the zero opening value, and responding to the torque request value from the zero torque value, wherein the release state represents that the electronic parking system is released within the preset time.
Optionally, when the current state information of the electronic parking system is in the transition state, setting the opening value of the accelerator pedal as the zero opening value and setting the requested torque value as the zero torque value, including, when the current state information of the electronic parking system is in the transition state, responding the logic gear as a parking gear signal; the accelerator pedal opening value is set to a zero opening value and the torque request value is set to a zero torque value.
Optionally, when the current state information of the electronic parking system is in the released state, responding to the accelerator pedal opening value from the zero opening value and responding to the torque request value from the zero torque value includes responding to the logic shift as a non-parking shift signal when the current state information of the electronic parking system is in the released state; the accelerator pedal opening value is responded to from the zero opening value, and the torque request value is responded to from the zero torque value.
Optionally, the method further includes switching the logic gear to a parking gear when the electronic parking system is not released after the preset time is exceeded; setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value.
Optionally, the acquiring the logic gear of the electric vehicle includes: and comprehensively judging according to the target gear, the brake pedal state signal, the vehicle speed signal and the gear shifting lock state signal to obtain a logic gear.
Optionally, the method further includes displaying the logic gear prompt on an instrument panel; and when the current state information of the electronic parking system is in a transition state, specially displaying the logic gear prompt.
Optionally, the special display includes: flashing or color display.
According to a specific embodiment of the present invention, the present invention provides an electric vehicle control apparatus, including a gear acquiring unit, configured to acquire a logical gear of the electric vehicle; the state acquisition unit is used for acquiring the current state information of the electronic parking system when the logic gear is switched from the parking gear to the non-parking gear; the electronic parking system comprises a processing unit, a control unit and a control unit, wherein the processing unit is used for setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value when the current state information of the electronic parking system is in a transition state, the transition state represents that the electronic parking system is not released in a preset time, and the zero opening value represents the opening value of the accelerator pedal when the accelerator pedal is not stepped; and a response unit, configured to respond to the accelerator pedal opening value from the zero opening value and respond to the torque request value from the zero torque value when the current state information of the electronic parking system is a released state, where the released state indicates that the electronic parking system is released within the preset time.
Optionally, the processing unit is further configured to respond to the logic shift as a parking shift signal when the current state information of the electronic parking system is a transition state; the accelerator pedal opening value is set to a zero opening value and the torque request value is set to a zero torque value.
Optionally, the response unit is further configured to respond to the logic shift as a non-parking shift signal when the current state information of the electronic parking system is a release state; the accelerator pedal opening value is responded to from the zero opening value, and the torque request value is responded to from the zero torque value.
Optionally, the electronic parking system further comprises a switching unit, configured to switch the logical shift to a parking shift when the electronic parking system is not released after the preset time; setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value.
Optionally, the system further comprises a display unit, configured to display the logic gear prompt on an instrument panel; when the current state information of the electronic parking system is in a transition state, performing special display on the logic gear prompt, wherein the special display comprises: flashing or color display.
According to an embodiment of the present invention, there is provided a storage medium storing executable instructions for execution by an automobile controller, the executable instructions when executed by the automobile controller implementing the method as described in any one of the above.
According to an embodiment of the present invention, an automotive controller is provided, on which one or more instructions are stored, and the one or more instructions, when executed by the automotive controller, implement the method as described in any one of the above.
According to an embodiment of the present invention, the present invention provides an electric vehicle, including the vehicle controller as described above.
Compared with the prior art, the embodiment of the invention has the following technical effects:
the present disclosure provides an electric vehicle control method, apparatus, controller and electric vehicle, the method requires acquiring a current logic gear of the electric vehicle, when the logic gear is changed, controlling a response timing of an accelerator pedal and a torque according to a current state of an electronic parking system, such that when the electronic parking system is in a released state, the accelerator pedal opening value is responded from the initial value, and the torque request value is responded from the zero torque value, thereby avoiding a violent vehicle-crossing or a collision accident due to immediate response to the accelerator pedal opening and/or the torque required value.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a flowchart of an electric vehicle control method according to an embodiment of the present invention;
FIG. 2 is a logic flow diagram of an electric vehicle control method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electric vehicle control device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electric vehicle system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
For ease of understanding, the english abbreviations referred to in this application are explained in a unified way:
VCU: the Vehicle Control Unit/Vehicle controller is used for uniformly controlling a circuit system of a whole Vehicle;
EGSM: the Electronic Gear Shift Module/Electronic Gear shifting device is used for receiving a Gear request signal of the Electronic Gear sequence manager according to the vehicle controller, and giving the real Gear of the vehicle by combining the vehicle speed condition and the brake pedal state of the vehicle;
EPB electric Park Brake/electronic parking System: the temporary braking function in the driving process and the long-time braking function after parking are integrated, and the parking braking is realized in an electronic control mode.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
According to a specific embodiment of the present invention, as shown in fig. 1, the present invention provides a method for controlling an electric vehicle, including the following method steps, where the sequence numbers of the method steps do not necessarily have the execution sequence:
step S102: and acquiring the logic gear of the electric automobile.
The VCU of the vehicle control unit comprehensively judges a logic gear according to the acquired target gear, the acquired brake pedal state signal, the acquired vehicle speed signal and the acquired gear shifting lock state signal, judges the running state of the whole vehicle according to the current logic gear, calculates the corresponding required torque, and sends the torque to the motor to execute the logic gear after filtering processing.
Generally, the logical shift positions include a parking position (P position) and a non-parking position (e.g., N position, D position, or R position), and an identifier of the logical shift position is displayed on the dashboard.
Step S104: and when the logic gear is switched from the parking gear to the non-parking gear, acquiring the current state information of the electronic parking system.
When the automobile is switched from a parking gear (P gear) to a non-parking gear (such as an N gear, a D gear or an R gear), the vehicle control unit VCU acquires the current state of the electronic parking system EPB, and judges whether the electronic parking system EPB is completely and automatically released according to the current state of the electronic parking system EPB. The electronic parking system EPB is completely released to indicate that the electric vehicle has no parking torque, and the electronic parking system EPB is not released to indicate that the electric vehicle has the parking torque and the vehicle cannot move forward or backward.
The EPB automatic release is realized by that in a parking state, after a driver operates to shift into a forward gear or a backward gear, the vehicle control unit VCU automatically judges the power condition by stepping on an accelerator to lift the power, and the EPB parking brake function is released. For example, when the electric vehicle is in a starting stage, if the EPB is in a pulled-up state (i.e., the vehicle is in a parking state), the accelerator is stepped to a certain depth, and the system automatically senses that the driver intends to drive, the EPB is automatically released.
The current state information includes a transition state and a release state, the transition state indicates that the electronic parking system is not released within a preset time, and the release state indicates that the electronic parking system is released within the preset time.
Step S106: when the current state information of the electronic parking system is a transition state, setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value, wherein the transition state indicates that the electronic parking system is not released within a preset time, and the zero opening value indicates the opening value of the accelerator pedal when the accelerator pedal is not pressed down.
The preset time can be any value within 1ms-10s, specific time values are not limited, the preset time is related to vehicle delivery conditions, vehicle electronic equipment states, whether the vehicle breaks down or not, and the preset time for different automobiles can be the same or different. And the electronic parking system keeps a parking state within the preset time range. At this time, the vehicle control unit VCU sets the accelerator pedal opening degree value to an initial value (normally, zero opening degree value) and sets the torque request value to a zero torque value, for example, when the driver has depressed the accelerator pedal (for example, the accelerator pedal has a pedal opening degree of 20%), the vehicle control unit VCU sets the accelerator pedal opening degree value to an initial value (for example, an initial value of 0), that is, the vehicle control unit VCU sets the pedal position at which the driver has not depressed the accelerator pedal, in response to the position at which the accelerator pedal is present. The instability caused by violent running due to deep stepping of the accelerator by a driver when the automobile is switched from the parking gear to the driving gear and the EPB release problem can be thoroughly solved from the aspect of driving comfort; the driver can be fundamentally prevented from deeply stepping on the accelerator when the automobile is switched from the parking gear to the driving gear, and the collision or the injury accident possibly caused by the EPB release problem can be avoided.
Meanwhile, when a driver is in a driving gear, such as a forward gear or a reverse gear, and an accelerator pedal is not stepped down or is deeply stepped on at the moment, the vehicle has certain torque request values, including forward torque request values or reverse torque request values, in order to avoid instability caused by vehicle fleeing, the VCU of the vehicle control unit sets the torque request values to be zero torque values, namely does not respond to torque requests caused by the forward gear and the accelerator pedal. Therefore, when the current state information of the electronic parking system is in a transition state, the opening value of the accelerator pedal needs to be set as an initial value, and the torque request value needs to be set as a zero torque value, so that the instability caused by vehicle crossing can be avoided.
As an alternative embodiment, the setting of the accelerator opening value to the zero opening value and the setting of the torque request value to the zero torque value when the current state information of the electronic parking system is the transition state includes, when the current state information of the electronic parking system is the transition state, responding the logical gear to a parking gear signal, namely, defaulting to a parking gear no matter whether the logical gear at the time is the parking gear or the non-parking gear; while setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value. Therefore, the electric vehicle does not move forward or backward in the transient state of the electronic parking system.
Step S108: and when the current state information of the electronic parking system is a release state, responding to the accelerator opening value from the zero opening value, and responding to the torque request value from the zero torque value, wherein the release state represents that the electronic parking system is released within the preset time.
As an alternative embodiment, the vehicle control unit VCU detects that the electronic parking system is completely released after a certain time (for example, 1s), starts to respond to the opening value of the accelerator pedal from the initial value (for example, zero opening value), and starts to respond to the torque request value from the zero torque value, for example, when the driver has pressed the accelerator pedal (for example, the accelerator pedal has a pedal opening of 20%), the vehicle control unit VCU responds to the accelerator pedal from a position with a pedal opening value of 0 to a position with an opening of 20%, the response process has a certain time so as not to cause instability of driving, and the response from 0-20% may be a curve or a straight line process with any acceleration slope, for example, the accelerator pedal may respond from 0 to 20% at a constant speed, or respond from 0 to 20% at a first speed and then slowly. The instability caused by violent running due to deep stepping of the accelerator by a driver when the automobile is switched from the parking gear to the driving gear and the EPB release problem can be thoroughly solved from the aspect of driving comfort; the driver can be fundamentally prevented from deeply stepping on the accelerator when the automobile is switched from the parking gear to the driving gear, and the collision or the injury accident possibly caused by the EPB release problem can be avoided.
Meanwhile, when the driver engages in a forward gear or a reverse gear, a torque demand (e.g., 100N) with a certain value is obtained after the accelerator pedal is not pressed down or is deeply pressed down, and the vehicle control unit VCU responds to the torque demand when detecting that the electronic parking system is completely released after a certain time (e.g., 1s), for example, continuously responds to a current demand torque value from a zero torque value after a period of time, so as to ensure driving stability. The response from 0 to 100N may be a curve or a straight line process with any acceleration slope, for example, the response may be from 0 to 100N at a constant speed, or from 0 to 100N at a first-speed and then-slow speed.
As an alternative embodiment, when the current state information of the electronic parking system is the released state, responding to the accelerator pedal opening value from the zero opening value and responding to the torque request value from the zero torque value includes responding to the logical shift position as a non-parking shift position signal, that is, immediately responding to a previous non-parking shift position signal, for example, a D shift position signal, when the current state information of the electronic parking system is the released state; the accelerator pedal opening value is responded to from the zero opening value, and the torque request value is responded to from the zero torque value.
As an optional implementation manner, the method further includes step S110 (not shown): when the electronic parking system is not released after the preset time is exceeded, switching the logic gear to a parking gear; setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value.
For example, after a preset time of 5s, the vehicle control unit VCU still detects that the electronic parking system is not released, and the unreleased time exceeds the time range of the safety setting, and at this time, the logical gear is directly switched to the parking gear; while setting the accelerator pedal opening value to an initial value and the torque request value to a zero torque value. The electric vehicle no longer responds to the driving operation by the driver. At the moment, whether the electric automobile breaks down or not can be detected, and potential safety hazards are avoided.
As an optional implementation manner, the method further includes step S112 (not shown): displaying the logic gear prompt on an instrument panel; and when the current state information of the electronic parking system is in the transition state, specially displaying the logic gear prompt. Optionally, the special display includes: flashing or color display. The prompt is carried out through the special prompt symbol, so that a driver can clearly determine the state of the current electronic parking system, and safety accidents are avoided.
The VCU of the vehicle controller can display a prompt symbol (for example N, P, D, R) corresponding to the current logic gear on an instrument panel in real time, when the vehicle is in a transition state and the electric vehicle does not respond to the driving operation of a driver, information prompt can be carried out through colors of flashing, red, yellow and the like so as to warn that the vehicle is in the transition state without being released by the electronic parking system, and the current gear state of the driver is reminded through instrument display before the vehicle is completely released.
The present disclosure provides an electric vehicle control method which requires acquisition of a current logical gear of an electric vehicle, and when the logical gear is changed, controls a response timing of an accelerator pedal and a torque according to a current state of an electronic parking system, such that when the electronic parking system is in a released state, the accelerator pedal opening value is responded from the initial value, and the torque request value is responded from the zero torque value, thereby avoiding a violent vehicle-crossing or a collision accident due to immediate response to the accelerator pedal opening value and the torque request value. The method can thoroughly solve the problem of instability caused by violent running due to deep stepping of the accelerator by a driver when the automobile is switched from the parking gear to the driving gear and the EPB release problem from the aspect of driving comfort; the driver can be fundamentally prevented from deeply stepping on the accelerator when the automobile is switched from the parking gear to the driving gear, and the collision or the injury accident possibly caused by the EPB release problem can be avoided.
According to a specific embodiment of the present invention, the present invention provides an electric vehicle control apparatus, configured to execute the method steps described in the above embodiment, where the same method steps have the same technical effects, and are not described herein again, specifically, as shown in fig. 3, the electric vehicle control apparatus 300 includes:
a gear acquiring unit 302, configured to acquire a logical gear of the electric vehicle;
a state obtaining unit 304, configured to obtain a current state of the electronic parking system when the logical shift is switched from the parking shift to the non-parking shift;
a processing unit 306, configured to set an accelerator opening value as an initial value and set a torque request value as a zero torque value when the current state information of the electronic parking system is a transition state, where the transition state indicates that the electronic parking system is not released within a preset time, and the initial value indicates the opening value of the accelerator pedal when the accelerator pedal is not depressed;
a response unit 308, configured to respond to the accelerator opening value from the initial value and respond to the torque request value from the zero torque value when the current state information of the electronic parking system is a released state, where the released state indicates that the electronic parking system is released within the preset time.
As an optional implementation manner, the processing unit is further configured to respond to the logic shift as a parking shift signal when the current state information of the electronic parking system is the transition state; the accelerator pedal opening value is set to an initial value and the torque request value is set to a zero torque value.
As an optional implementation manner, the response unit is further configured to respond to the logic shift as a non-parking shift signal when the current state information of the electronic parking system is in a released state; starting to respond to the accelerator pedal opening value from the initial value and starting to respond to the torque request value from the zero torque value.
As an alternative embodiment, the electric vehicle control apparatus 300 further includes a switching unit (not shown) configured to switch the logic gear to the parking gear when the electronic parking system is not released over the preset time; the accelerator pedal opening value is set to an initial value and the torque request value is set to a zero torque value.
As an optional embodiment, the electric vehicle control apparatus 300 further includes a display unit (not shown) for displaying the logic gear indicator on an instrument panel; when the electronic parking system is in the transition state, performing special display on the logic gear prompt, wherein the special display comprises: flashing or color display.
The disclosed embodiment provides an electric vehicle control apparatus which controls response timing of an accelerator pedal and torque according to a current state of an electronic parking system by acquiring a current logical gear of an electric vehicle when the logical gear is changed, so that when the electronic parking system is in a released state, the accelerator pedal opening value is responded from the initial value, and the torque request value is responded from the zero torque value, thereby avoiding a violent vehicle-crossing or a crash accident caused by immediately responding to the opening of the accelerator pedal and the required value of the torque.
According to an embodiment of the present invention, an automotive controller is provided, on which one or more instructions are stored, and the one or more instructions, when executed by the automotive controller, implement the method as described in any one of the above.
The embodiment of the present disclosure provides an electric vehicle, the electric vehicle includes: at least one processor and the automobile controller; and a memory communicatively coupled to the at least one automotive controller; wherein the memory stores instructions executable by the one processor to be executed by the at least one automotive controller to enable the at least one automotive controller to perform the method as described above.
The embodiment of the disclosure provides a storage medium, wherein the storage medium stores executable instructions executed by an automobile controller, and the method described above can be executed by the automobile controller executing the executable instructions.
The embodiment of the present disclosure further provides an electric vehicle, as shown in fig. 4, including: a gear system 401, a parking system 402, a brake pedal 403, a vehicle control unit 404 and a motor controller 405; the gear system 401, the parking system 402, the brake pedal 403 and the vehicle controller 404 are connected to the motor controller 405, the motor controller 405 acquires current vehicle state information according to information sent by the gear system 401, the parking system 402, the brake pedal 403 and the vehicle controller 404, generates a parking release control instruction when the vehicle state information meets a parking release condition, and controls the parking system to perform parking release operation according to the parking release control instruction; and when the state information of the whole vehicle meets the parking condition, generating a parking locking control instruction, and controlling a parking system to perform parking operation according to the parking locking control instruction.
As shown in fig. 4, the electric vehicle further includes: and the meter system 406 is connected with the motor controller 405, and the meter system 406 is used for receiving and displaying parking position information sent by the parking system 402 through the motor controller 405, such as the N gear, the P gear, the D gear or the R gear.
Wherein parking system 402 comprises: a parking control unit 4021 that receives a control instruction sent from the motor controller 405; a parking motor 4022, a parking sensor 4023, and a parking actuator 4024 connected to the parking control unit 4021; the parking control unit 4021 controls a parking motor 4022 and a parking execution unit 4024 to perform a parking or parking release operation, and a parking sensor 4023 is used to detect whether the parking or parking release operation is performed in place.
The invention can control the opening degree of the brake pedal and the required torque of the whole vehicle according to the state of the parking system of the electric vehicle. The vehicle control unit 404 acquires a current logical gear of the parking system 402, and controls a response timing of an accelerator pedal and a torque according to a current state of the parking system 402 when the logical gear is changed, so that the accelerator pedal opening value is responded from the initial value and/or the torque request value is responded from the zero torque value when the parking system 402 is in a released state, thereby avoiding a violent car-crossing or a collision accident due to immediate response to the accelerator pedal opening and/or the torque request value. The instability caused by violent running due to deep stepping of the accelerator by a driver when the automobile is switched from the parking gear to the driving gear and the EPB release problem can be thoroughly solved from the aspect of driving comfort; the driver can be fundamentally prevented from deeply stepping on the accelerator when the automobile is switched from the parking gear to the driving gear, and the collision or the injury accident possibly caused by the EPB release problem can be avoided.
Finally, it should be noted that: 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 system or 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.
The terms "comprises," "comprising," or any other variation thereof, in the specification are intended to cover a non-exclusive inclusion, such that an 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
The above examples are only intended to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (15)
1. A control method of an electric vehicle is characterized by comprising the following steps,
acquiring a logic gear of the electric automobile;
when the logic gear is switched from the parking gear to the non-parking gear, acquiring current state information of the electronic parking system;
when the current state information of the electronic parking system is a transition state, setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value, wherein the transition state indicates that the electronic parking system is not released within a preset time, and the zero opening value indicates the opening value of the accelerator pedal when the accelerator pedal is not pressed down;
and when the current state information of the electronic parking system is a release state, responding to the accelerator opening value from the zero opening value, and responding to the torque request value from the zero torque value, wherein the release state represents that the electronic parking system is released within the preset time.
2. The method according to claim 1, wherein the setting of the accelerator pedal opening value to a zero opening value and the setting of the torque request value to a zero torque value when the current state information of the electronic parking system is the transition state, includes,
when the current state information of the electronic parking system is in a transition state, responding the logic gear to a parking gear signal;
the accelerator pedal opening value is set to a zero opening value and the torque request value is set to a zero torque value.
3. The method according to claim 1, wherein the responding to the accelerator pedal opening value from the zero opening value and the responding to the torque request value from the zero torque value when the current state information of the electronic parking system is the released state includes,
when the current state information of the electronic parking system is in a release state, responding the logic gear to be a non-parking gear signal;
the accelerator pedal opening value is responded to from the zero opening value, and the torque request value is responded to from the zero torque value.
4. The method of claim 1, further comprising,
when the electronic parking system is not released after the preset time is exceeded, switching the logic gear to a parking gear;
setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value.
5. The method of claim 1, wherein the obtaining the logical gear of the electric vehicle comprises:
and comprehensively judging according to the target gear, the brake pedal state signal, the vehicle speed signal and the gear shifting lock state signal to obtain a logic gear.
6. The method of claim 1, further comprising,
displaying the logic gear prompt on an instrument panel;
and when the current state information of the electronic parking system is in a transition state, specially displaying the logic gear prompt.
7. The method of claim 6, wherein the special display comprises: flashing or color display.
8. A control device of an electric vehicle is characterized in that,
the gear acquisition unit is used for acquiring the logic gear of the electric automobile;
the state acquisition unit is used for acquiring the current state information of the electronic parking system when the logic gear is switched from the parking gear to the non-parking gear;
the electronic parking system comprises a processing unit, a control unit and a control unit, wherein the processing unit is used for setting an opening value of an accelerator pedal as a zero opening value and setting a torque request value as a zero torque value when the current state information of the electronic parking system is in a transition state, the transition state represents that the electronic parking system is not released in a preset time, and the zero opening value represents the opening value of the accelerator pedal when the accelerator pedal is not stepped;
and a response unit, configured to respond to the accelerator pedal opening value from the zero opening value and respond to the torque request value from the zero torque value when the current state information of the electronic parking system is a released state, where the released state indicates that the electronic parking system is released within the preset time.
9. The apparatus of claim 8, wherein the processing unit is further configured to,
when the current state information of the electronic parking system is in a transition state, responding the logic gear to a parking gear signal; the accelerator pedal opening value is set to a zero opening value and the torque request value is set to a zero torque value.
10. The apparatus of claim 8, wherein the response unit is further configured to,
when the current state information of the electronic parking system is in a release state, responding the logic gear to be a non-parking gear signal; the accelerator pedal opening value is responded to from the zero opening value, and the torque request value is responded to from the zero torque value.
11. The apparatus of claim 8, further comprising,
the switching unit is used for switching the logic gear to a parking gear when the electronic parking system is not released after the preset time is exceeded; setting the accelerator pedal opening value to a zero opening value and the torque request value to a zero torque value.
12. The apparatus of claim 11, further comprising,
the display unit is used for displaying the logic gear prompt on an instrument panel; when the current state information of the electronic parking system is in a transition state, performing special display on the logic gear prompt, wherein the special display comprises: flashing or color display.
13. A storage medium storing executable instructions for execution by an automotive controller, the executable instructions when executed by the automotive controller implementing the method of any one of claims 1-7.
14. An automotive controller having one or more instructions stored thereon that, when executed by the automotive controller, implement the method of any one of claims 1-7.
15. An electric vehicle comprising the vehicle controller of claim 14.
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