Automatic release control method and apparatus for electronic parking brake, electronic device, medium, and vehicle

Abstract

The present application discloses an automatic release control method and apparatus for an electronic parking brake, an electronic device, a medium, and a vehicle. The method comprises: acquiring a driving operation signal, the driving operation signal at least comprising a gear operation signal, a brake pedal operation signal, and an accelerator operation signal; acquiring current slope data; determining a target traveling state on the basis of the current slope data and the driving operation signal; and on the basis of the target traveling state, the current slope data, and the driving operation signal, determining whether an automatic release condition for an electronic parking brake is met, and determining whether to control the electronic parking brake to be released. According to the present application, incorporating the gear shifting operation of a driver, and considering the possible phenomenon of a vehicle sliding backward on a slope during release of the electronic parking brake, automatic release of the electronic parking brake is achieved, sliding backward on a slope during the release of the electronic parking brake is avoided, the driving safety is improved, and the present application is widely applied to the field of automobile control.

Description

Automatic release control method, device, electronic equipment, medium and vehicle for electronic parking brake system Technical Field

[0001] The present application relates to the field of automobile control, and in particular to an automatic release control method, device, electronic equipment, medium and vehicle for an electronic parking brake system. Background Art

[0002] With the development of intelligent automobiles, electronic parking brake systems have been widely used (Electrical Parking Brake), which have changed from traditional mechanical parking systems to electronic systems, greatly facilitating the driver's operation.

[0003] The automatic release of the electronic parking brake system occurs when the driver engages forward or reverse gear while the vehicle is parked and increases power by pressing the accelerator. The system then automatically determines the power level and releases the parking brake. Existing automatic release control methods for electronic parking brake systems only consider gear changes, automatically releasing the electronic parking brake system when the gear is shifted to forward or reverse. These methods fail to account for the possibility of the vehicle rolling down a slope during the release process, posing a safety hazard and impacting the user experience.

[0004] Summary of the Invention

[0005] In order to solve at least one technical problem existing in the above-mentioned related technologies, the embodiments of the present application propose an automatic release control method, device, electronic device, medium and vehicle for an electronic parking brake system, which can realize automatic release of the electronic parking brake system, avoid rolling down the slope during the release process of the electronic parking brake system, and improve driving safety and driving experience.

[0006] In one aspect, an embodiment of the present application provides a method for controlling automatic release of an electronic parking brake system, the method comprising the following steps:

[0007] Acquire a driving operation signal; the driving operation signal includes at least a gear operation signal, a brake pedal operation signal, and an accelerator operation signal;

[0008] Get current slope data;

[0009] determining a target driving state according to the current slope data and the driving operation signal;

[0010] According to the target driving state, the current slope data and the driving operation signal, it is determined whether an automatic release condition of an electronic parking brake system is satisfied and whether the electronic parking brake system is controlled to be released.

[0011] In some embodiments, the step of determining the target driving state based on the current slope data and the driving operation signal specifically includes:

[0012] When the vehicle gear is switched from any gear to a forward gear or a reverse gear, determining the target driving state as a vehicle gear-shifting driving state;

[0013] When the current slope is positive and greater than the first slope threshold, and the vehicle gear is in the forward gear, determining that the target driving state is the forward uphill state, wherein the current slope being positive indicates that the vehicle head is facing the uphill direction;

[0014] When the current slope is negative and greater than the first slope threshold, and the vehicle gear is in reverse gear, determining that the target driving state is a reverse downhill state, wherein the current slope is negative indicating that the front of the vehicle is facing downhill;

[0015] When the vehicle gear is in the forward gear or the reverse gear and the current slope is less than the first slope threshold, determining that the target driving state is a flat road driving state;

[0016] When the current slope is negative and the vehicle gear is in the forward gear, determining that the target driving state is the forward downhill state;

[0017] When the current slope is positive and the vehicle gear is in the reverse gear, the target driving state is determined to be a reverse uphill state.

[0018] In some embodiments, the step of determining whether an automatic release condition of the electronic parking brake system is satisfied and determining whether to control the electronic parking brake system to release the electronic parking brake system based on the target driving state, the current slope data, and the driving operation signal specifically includes:

[0019] When the target driving state is the vehicle shifting driving state and the current slope is greater than a second slope threshold, controlling the electronic parking brake system not to release;

[0020] When the target driving state is the vehicle shifting driving state and the current slope is less than the first slope threshold, controlling the electronic parking brake system to release;

[0021] When the target driving state is the vehicle shifting driving state and the current slope is greater than the first slope threshold but less than the second slope threshold, determining a braking force corresponding to the brake pedal operation signal, and determining whether to control the electronic parking brake system to release the brake according to the braking force;

[0022] When the target driving state is the forward uphill state or the reverse downhill state, determining a current torque corresponding to the throttle operation signal, and determining whether to control the electronic parking brake system to release according to the current torque and the current slope;

[0023] When the target driving state is the flat road driving state, the forward downhill state or the reverse uphill state, the throttle opening corresponding to the throttle operation signal is determined, and whether to control the electronic parking brake system to release is determined according to the throttle opening.

[0024] In some embodiments, when the target driving state is the flat road driving state, the forward downhill state, or the reverse uphill state, determining the throttle opening corresponding to the throttle operation signal, and determining whether to control the electronic parking brake system to release according to the throttle opening specifically includes:

[0025] When the throttle opening is greater than a given throttle opening threshold, the electronic parking brake system is controlled to be released; otherwise, the electronic parking brake system is controlled not to be released.

[0026] In some embodiments, when the target driving state is the vehicle shifting driving state and the current slope is greater than the first slope threshold but less than the second slope threshold, determining the braking force corresponding to the brake pedal operation signal, and determining whether to control the electronic parking brake system to release the brake according to the braking force specifically includes:

[0027] When the braking force is greater than the current braking threshold, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release;

[0028] The current braking threshold is calculated by the following formula:

[0029] Among them, p is the current braking threshold, k is a constant, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, a is the current slope, R is the wheel rolling radius, k b is the braking efficiency factor, and r is the braking radius.

[0030] In some embodiments, when the target driving state is the forward uphill state or the reverse downhill state, determining a current torque corresponding to the throttle operation signal, and determining whether to control the electronic parking brake system to release based on the current torque and the current slope, specifically includes:

[0031] When the current torque is greater than the current torque threshold, the electronic parking brake system is controlled to be released; otherwise, the electronic parking brake system is controlled not to be released;

[0032] The current torque threshold is calculated by the following formula: c=mga;

[0033] Among them, c is the current torque threshold, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, and a is the current slope.

[0034] On the other hand, an embodiment of the present application provides an automatic release control device for an electronic parking brake system, the device comprising:

[0035] The first module is configured to obtain a driving operation signal; the driving operation signal includes at least a gear operation signal, a brake pedal operation signal, and an accelerator operation signal;

[0036] The second module is used to obtain current slope data;

[0037] A third module is configured to determine a target driving state based on the current slope data and the driving operation signal;

[0038] The fourth module is used to determine whether the automatic release condition of the electronic parking brake system is met and determine whether to control the electronic parking brake system to release it according to the target driving state, the current slope data and the driving operation signal.

[0039] On the other hand, an embodiment of the present application proposes an electronic device, which includes a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to implement the aforementioned automatic release control method of the electronic parking brake system when executing the computer program.

[0040] On the other hand, an embodiment of the present application further proposes a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the automatic release control method of the electronic parking brake system described above is implemented.

[0041] On another aspect, an embodiment of the present application provides a vehicle, which includes the automatic release control device of the electronic parking brake system as described above or the electronic device as described above.

[0042] This application provides a method, device, electronic device, medium, and vehicle for controlling the automatic release of an electronic parking brake system. The method obtains a driving operation signal and current slope data, determines the vehicle's target driving state based on the current slope data and the driving operation signal, and then, based on the target driving state, determines whether the conditions for automatic release of the electronic parking brake system are met and determines whether to control the electronic parking brake system to release the brake. This application can coordinate with the driver's shifting operation, taking into account the possibility of the vehicle rolling down a slope during the release process of the electronic parking brake system, and automatically release the electronic parking brake system, thereby preventing rolling down a slope during the release process and improving driving safety and the driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a flow chart of an automatic release control method for an electronic parking brake system provided by an embodiment of the present application;

[0044] FIG2 is a schematic diagram of an embodiment of the present application in a forward-moving uphill state;

[0045] FIG3 is a schematic diagram of a backward downhill state in an embodiment of the present application;

[0046] FIG4 is a schematic diagram of a flat road driving state in an embodiment of the present application;

[0047] FIG5 is a schematic diagram of a forward downhill state in an embodiment of the present application;

[0048] FIG6 is a schematic diagram of a backward uphill state in an embodiment of the present application;

[0049] FIG7 is a schematic structural diagram of an automatic release control device for an electronic parking brake system provided in an embodiment of the present application;

[0050] FIG8 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0052] It should be noted that although the device schematics illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the device or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0054] First, let’s analyze some of the terms used in this application:

[0055] EPB (Electrical Park Brake): This system uses electronic circuitry to control the parking brake. It functions similarly to a mechanical lever parking brake. You don't need to manually deactivate the electronic parking brake before starting; it automatically engages when you press the accelerator to start.

[0056] The existing automatic release control method of the electronic parking brake system only considers the change of gear, that is, the electronic parking brake system is automatically released when the gear is switched to forward gear or reverse gear. It does not consider the possible vehicle rolling down the slope during the release process of the electronic parking brake system, which brings certain safety hazards and affects the user experience.

[0057] Based on this, the embodiments of the present application propose an automatic release control method, device, electronic device, medium and vehicle for an electronic parking brake system, which can cooperate with the driver's gear shifting operation to realize automatic release of EPB, while taking into account factors such as brake pressure and throttle. While realizing automatic release of EPB, it avoids sliding down the slope during the EPB release process, thereby improving safety.

[0058] 1 , which is an optional flowchart of an automatic release control method for an electronic parking brake system provided by an embodiment of the present application, the method may include but is not limited to steps S101 to S104:

[0059] Step S101, obtaining a driving operation signal; the driving operation signal at least includes a gear operation signal, a brake pedal operation signal, and an accelerator operation signal;

[0060] Step S102, obtaining current slope data;

[0061] Step S103, determining the target driving state based on the current slope data and the driving operation signal;

[0062] Step S104 , judging whether the automatic release condition of the electronic parking brake system is satisfied and determining whether to control the electronic parking brake system to release it according to the target driving state, the current slope data and the driving operation signal.

[0063] In some embodiments, the above-mentioned driving operation signals may also include seat belt operation signals, door locking signals, and window closing signals, etc. Optionally, the gear position of the vehicle and its changes are detected to determine the gear operation signal, the brake pedal depression depth is detected to determine the brake pedal operation signal, and the accelerator depression depth is detected to determine the accelerator operation signal.

[0064] In some embodiments, the target driving state includes at least a vehicle shifting state, a forward uphill state, a backward downhill state, a flat road driving state, a forward downhill state, and a backward uphill state. Step S103 may include, but is not limited to, steps S301 to S306:

[0065] Step S301, when the vehicle gear is switched from any gear to a forward gear or a reverse gear, determining that the target driving state is a vehicle gear-shifting driving state;

[0066] Step S302: When the current slope is positive and greater than a first slope threshold, and the vehicle is in a forward gear, determining that the target driving state is a forward uphill state, wherein a positive current slope indicates that the vehicle is facing an uphill direction;

[0067] Step S303: When the current slope is negative and greater than a first slope threshold, and the vehicle is in reverse gear, determining that the target driving state is a reverse downhill state, wherein the current slope being negative indicates that the vehicle is facing downhill;

[0068] Step S304: when the vehicle gear is in the forward gear or the reverse gear and the current slope is less than the first slope threshold, determining that the target driving state is a flat road driving state;

[0069] Step S305 , when the current slope is negative and the vehicle gear is in the forward gear, determining that the target driving state is the forward downhill state;

[0070] Step S306: When the current slope is positive and the vehicle gear is in reverse gear, it is determined that the target driving state is a reverse uphill state.

[0071] In step S301 of some embodiments, when the vehicle gear is switched from any gear to a forward gear or a reverse gear, for example, from a parking gear, a reverse gear or a neutral gear to a forward gear, or from a forward gear, a parking gear or a neutral gear to a reverse gear, the target driving state is determined to be the vehicle gear shifting driving state.

[0072] In step S302 of some embodiments, referring to FIG2 , assuming that the first slope threshold is a1 (a1 is 2%, and the possible range is 2% to 4%), the vehicle is located on a slope, the slope of the slope is greater than a1, and the front of the vehicle is facing uphill, and the vehicle gear is in the forward gear, it is determined that the target driving state is the forward uphill state.

[0073] In step S303 of some embodiments, referring to FIG3 , the vehicle is located on a slope with a slope greater than a1, the front of the vehicle is facing downhill, and the vehicle is in reverse gear, and the target driving state is determined to be a reverse downhill state.

[0074] In step S304 of some embodiments, referring to FIG. 4 , when it is determined that the slope of the road section where the vehicle is located is less than a1 and the vehicle gear is in the forward gear or the reverse gear, the target driving state is determined to be the flat road driving state.

[0075] In step S305 of some embodiments, referring to FIG. 5 , the vehicle is on a slope with the front of the vehicle facing downhill, and the vehicle gear is in forward gear or neutral, and the target driving state is determined to be a forward downhill state.

[0076] In step S306 of some embodiments, referring to FIG. 6 , the vehicle is located on a slope with the front of the vehicle facing uphill and the vehicle gear is in reverse or neutral, and the target driving state is determined to be a reverse uphill state.

[0077] In some embodiments, step S104 may include but is not limited to steps S401 to S405:

[0078] Step S401: When the target driving state is a vehicle shifting driving state and the current slope is greater than a second slope threshold, controlling the electronic parking brake system not to release;

[0079] Step S402: When the target driving state is a vehicle shifting state and the current slope is less than a first slope threshold, the electronic parking brake system is controlled to release;

[0080] Step S403: When the target driving state is a vehicle shifting state and the current slope is greater than a first slope threshold but less than a second slope threshold, determining a braking force corresponding to the brake pedal operation signal, and determining whether to control the electronic parking brake system to release the brake according to the braking force;

[0081] Step S404: When the target driving state is an uphill forward state or a downhill reverse state, determining the current torque corresponding to the throttle operation signal, and determining whether to control the electronic parking brake system to release based on the current torque and the current slope;

[0082] Step S405 , when the target driving state is a flat road driving state, a forward downhill state or a reverse uphill state, the throttle opening corresponding to the throttle operation signal is determined, and whether to control the electronic parking brake system to release is determined according to the throttle opening.

[0083] In steps S401 to S402 of some embodiments, when the driver switches the gear from any gear to the forward gear or the reverse gear, it is determined whether the vehicle is on a slope, thereby determining whether to control the electronic parking brake system to release.

[0084] Optionally, assuming that the second slope threshold is a2 (a2 is 8%, with a possible range of 8% to 10%), when the vehicle is on a slope and the current slope is greater than a2, it is easy to roll down the slope. Therefore, when it is detected that the driver is performing a gear shifting operation, that is, when the target driving state is the vehicle gear shifting state, the electronic parking brake system is controlled not to be released to avoid rolling down the slope and improve safety; when the vehicle is on a road section with a current slope less than a1, the risk of rolling down the slope is very small. When it is detected that the driver is performing a gear shifting operation, the electronic parking brake system is controlled to perform automatic release.

[0085] In step S403 of some embodiments, when the vehicle is on a slope and the current slope is greater than a1 and less than a2, there is a certain risk of rolling down the slope. The driver needs to step on the brake pedal and maintain a certain braking force to control the electronic parking brake system to perform automatic release during gear shifting. Specifically, when the braking force is greater than the current braking threshold, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release. The current braking threshold is calculated using the following formula:

[0086] Among them, p is the current braking threshold, k is a constant, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, a is the current slope, R is the wheel rolling radius, k b is the braking efficiency factor, and r is the braking radius.

[0087] Assume that the vehicle is on a slope, and the current slope is greater than a1 and less than a2. The driver performs a gear shift operation, that is, when the target driving state is determined to be the vehicle gear shift driving state, the brake pedal operation signal is obtained and the corresponding braking force p is determined. now , when the braking force p now When it is greater than the current braking threshold p, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release.

[0088] In step S404 of some embodiments, when the vehicle gear has been switched to the forward gear or the reverse gear, and the target driving state is the forward uphill state or the reverse downhill state, there is a certain risk of rolling downhill. The electronic parking brake system is controlled not to perform automatic release. If the driver has fastened the seat belt and closed the doors and windows, the EPB can be automatically released by stepping on the accelerator. Specifically, when the current torque is greater than the current torque threshold, the electronic parking brake system is controlled to release. Otherwise, the electronic parking brake system is controlled not to release. The current torque threshold is calculated by the following formula: c=mga;

[0089] Among them, c is the current torque threshold, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, and a is the current slope.

[0090] For example, the current vehicle gear is in forward gear or reverse gear, and the vehicle's electronic parking brake system is not released, that is, the EPB is still in the clamped state. The EPB can be automatically released by stepping on the accelerator. Assuming that the target driving state is the forward uphill state and the current slope is a, when the current torque c is detected now When the torque is greater than the current threshold value c=mga and it is determined that the driver has fastened his seat belt and closed the door, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release.

[0091] In step S405 of some embodiments, when driving on a flat road, the risk of rolling down a slope is very small. When the driver steps on the accelerator and the throttle opening is greater than a given throttle opening threshold, the EPB can be automatically released. Specifically, when the throttle opening is greater than the throttle opening threshold, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release.

[0092] Assume that the throttle opening threshold is b. When the throttle opening is greater than b (b is 1%, and the range is 1% to 10%), the electronic parking brake system is released when the vehicle is driving on a flat road. When the throttle opening is less than or equal to b, the electronic parking brake system is not released when the vehicle is driving on a flat road.

[0093] In some embodiments, the method for automatically releasing an electronic parking brake system provided by the embodiments of the present application may include, but is not limited to, the following specific application examples:

[0094] In Example 1, when the vehicle is traveling on a flat road and the driver switches from the parking gear to the driving gear, the electronic parking brake system automatically releases the brake.

[0095] In Example 2, the vehicle is on a 5% slope (between a1 and a2), with the front of the vehicle facing uphill, i.e., the target driving state is forward uphill. The driver lightly depresses the brake pedal, with the brake pressure at 5 bar (less than p), shifting from parking gear to forward gear. The electronic parking brake system does not automatically release.

[0096] Example 3: The vehicle is on a 5% slope (between a1 and a2), facing uphill. The driver lightly presses the brake pedal, the brake pressure is 5 bar (less than p), and the vehicle switches from park to reverse. The EPB does not automatically release.

[0097] In Example 4, a vehicle is on a 10% (greater than a2) slope, with the front of the vehicle facing uphill. The driver deeply depresses the brake pedal to shift from park to drive. The electronic parking brake system does not automatically release. However, when the driver fastens the seat belt, closes the door, and depresses the accelerator, the electronic parking brake system automatically releases when the current torque exceeds the current torque threshold c.

[0098] In Example 5, a vehicle is on a 5% slope (between a1 and a2), facing uphill. The driver lightly presses the brake pedal to a brake pressure of 5 bar (less than p) while shifting from park to drive. The electronic parking brake system does not automatically release. The driver fastens their seatbelt, closes the door, and presses the accelerator. When the current torque exceeds the current torque threshold c, the electronic parking brake system automatically releases.

[0099] In Example 6, the vehicle is on a 5% slope (between a1 and a2), with the front of the vehicle facing uphill. The driver lightly presses the brake pedal, the brake pressure is 5 bar (less than p), and the vehicle shifts from the parking gear to the reverse gear. The driver fastens the seat belt and closes the door, and the electronic parking brake system automatically releases.

[0100] 7 , which is a schematic diagram of an optional structure of an automatic release control device for an electronic parking brake system provided in an embodiment of the present application, the device may include but is not limited to:

[0101] The first module is used to obtain a driving operation signal; the driving operation signal includes at least a gear operation signal, a brake pedal operation signal and an accelerator operation signal;

[0102] The second module is used to obtain current slope data;

[0103] The third module is used to determine the target driving state based on the current slope data and the driving operation signal;

[0104] The fourth module is used to determine whether the automatic release conditions of the electronic parking brake system are met and determine whether to control the electronic parking brake system to release it based on the target driving state, current slope data and driving operation signals.

[0105] The specific implementation of the automatic release control device for an electronic parking brake system is substantially the same as the specific embodiment of the automatic release control method for an electronic parking brake system described above, and will not be described in detail herein.

[0106] The present application also provides an electronic device comprising a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method for controlling the automatic release of an electronic parking brake system. The electronic device can be any intelligent terminal, such as a tablet computer or an in-vehicle computer.

[0107] Please refer to FIG8 , which illustrates a hardware structure of an electronic device according to another embodiment. The electronic device includes:

[0108] The processor 801 may be implemented as a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application.

[0109] The memory 802 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 802 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program codes are stored in the memory 802 and are called by the processor 801 to execute the automatic release control method of the electronic parking brake system of the embodiments of this application.

[0110] Input / output interface 803, used to implement information input and output;

[0111] Communication interface 804, used to implement communication interaction between this device and other devices, which can be achieved through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WiFi, Bluetooth, etc.);

[0112] Bus 805 , which transmits information between various components of the device (e.g., processor 801 , memory 802 , input / output interface 803 , and communication interface 804 );

[0113] The processor 801 , the memory 802 , the input / output interface 803 and the communication interface 804 are connected to each other in communication within the device via a bus 805 .

[0114] An embodiment of the present application further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned automatic release control method for the electronic parking brake system.

[0115] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0116] The present application also provides a vehicle comprising the aforementioned electric drive assembly for the automatic release control or electronic device of the electronic parking brake system. Specifically, the vehicle can be a private vehicle, such as a sedan, SUV, MPV, or pickup truck. The vehicle can also be a commercial vehicle, such as a van, bus, small truck, or large trailer. The vehicle can be a gasoline vehicle or a new energy vehicle. If the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0117] This application provides a method, device, electronic device, medium, and vehicle for controlling the automatic release of an electronic parking brake system. The method obtains a driving operation signal and current slope data, determines the vehicle's target driving state based on the current slope data and the driving operation signal, and then, based on the target driving state, determines whether the conditions for automatic release of the electronic parking brake system are met and determines whether to control the electronic parking brake system to release the brake. This application can coordinate with the driver's shifting operation, taking into account the possibility of the vehicle rolling down a slope during the release process of the electronic parking brake system, and automatically release the electronic parking brake system, thereby preventing rolling down a slope during the release process and improving driving safety and the driving experience.

[0118] The embodiments described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0119] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0120] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0121] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0122] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. A method for controlling automatic release of an electronic parking brake system, characterized in that: The method comprises the following steps: Acquire a driving operation signal; the driving operation signal includes at least a gear operation signal, a brake pedal operation signal, and an accelerator operation signal; Get current slope data; determining a target driving state according to the current slope data and the driving operation signal; According to the target driving state, the current slope data and the driving operation signal, it is determined whether an automatic release condition of an electronic parking brake system is satisfied and whether the electronic parking brake system is controlled to be released.

2. The automatic release control method of the electronic parking brake system according to claim 1, characterized in that: The step of determining the target driving state based on the current slope data and the driving operation signal specifically includes: When the vehicle gear is switched from any gear to a forward gear or a reverse gear, determining the target driving state as a vehicle gear-shifting driving state; When the current slope is positive and greater than the first slope threshold, and the vehicle gear is in the forward gear, determining that the target driving state is the forward uphill state, wherein the current slope being positive indicates that the vehicle head is facing the uphill direction; When the current slope is negative and greater than the first slope threshold, and the vehicle gear is in reverse gear, determining that the target driving state is a reverse downhill state, wherein the current slope is negative indicating that the front of the vehicle is facing downhill; When the vehicle gear is in the forward gear or the reverse gear and the current slope is less than the first slope threshold, determining that the target driving state is a flat road driving state; When the current slope is negative and the vehicle gear is in the forward gear, determining that the target driving state is the forward downhill state; When the current slope is positive and the vehicle gear is in the reverse gear, the target driving state is determined to be a reverse uphill state.

3. The automatic release control method of the electronic parking brake system according to claim 2, characterized in that: The step of determining whether an automatic release condition of the electronic parking brake system is satisfied and determining whether to control the electronic parking brake system to release the electronic parking brake system according to the target driving state, the current slope data, and the driving operation signal specifically includes: When the target driving state is the vehicle shifting driving state and the current slope is greater than a second slope threshold, controlling the electronic parking brake system not to release; When the target driving state is the vehicle shifting driving state and the current slope is less than the first slope threshold, controlling the electronic parking brake system to release; When the target driving state is the vehicle shifting driving state and the current slope is greater than the first slope threshold but less than the second slope threshold, determining a braking force corresponding to the brake pedal operation signal, and determining whether to control the electronic parking brake system to release the brake according to the braking force; When the target driving state is the forward uphill state or the reverse downhill state, the throttle operation signal is determined. a current torque corresponding to the number, and determining whether to control the electronic parking brake system to release according to the current torque and the current slope; When the target driving state is the flat road driving state, the forward downhill state or the reverse uphill state, the throttle opening corresponding to the throttle operation signal is determined, and whether to control the electronic parking brake system to release is determined according to the throttle opening.

4. The automatic release control method of the electronic parking brake system according to claim 3, characterized in that: The step of determining a throttle opening corresponding to the throttle operation signal when the target driving state is the flat road driving state, the forward downhill state, or the reverse uphill state, and determining whether to control the electronic parking brake system to release the brake according to the throttle opening specifically includes: When the throttle opening is greater than a given throttle opening threshold, the electronic parking brake system is controlled to be released; otherwise, the electronic parking brake system is controlled not to be released.

5. The automatic release control method of the electronic parking brake system according to claim 3, characterized in that: The step of determining a braking force corresponding to the brake pedal operation signal and determining whether to control the electronic parking brake system to release the vehicle based on the braking force when the target driving state is the vehicle shifting driving state and the current slope is greater than the first slope threshold but less than the second slope threshold specifically includes: When the braking force is greater than the current braking threshold, the electronic parking brake system is controlled to release; otherwise, the electronic parking brake system is controlled not to release; The current braking threshold is calculated by the following formula: Among them, p is the current braking threshold, k is a constant, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, a is the current slope, R is the wheel rolling radius, k b is the braking efficiency factor, and r is the braking radius.

6. The automatic release control method of the electronic parking brake system according to claim 3, characterized in that: The step of determining a current torque corresponding to the throttle operation signal when the target driving state is the forward uphill state or the reverse downhill state, and determining whether to control the electronic parking brake system to release the vehicle based on the current torque and the current slope, specifically includes: When the current torque is greater than the current torque threshold, the electronic parking brake system is controlled to be released; otherwise, the electronic parking brake system is controlled not to be released; The current torque threshold is calculated by the following formula: c=mga; Among them, c is the current torque threshold, m is the fully loaded mass of the vehicle, g is the acceleration of gravity, and a is the current slope.

7. An automatic release control device for an electronic parking brake system, characterized in that: The device comprises: The first module is configured to obtain a driving operation signal; the driving operation signal includes at least a gear operation signal, a brake pedal operation signal, and an accelerator operation signal; The second module is used to obtain current slope data; A third module is configured to determine a target driving state based on the current slope data and the driving operation signal; The fourth module is used to determine whether the automatic release condition of the electronic parking brake system is met and determine whether to control the electronic parking brake system to release it according to the target driving state, the current slope data and the driving operation signal.

8. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is used to store a computer program, and the processor is used to implement the automatic release control method of the electronic parking brake system according to any one of claims 1 to 7 when executing the computer program.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the electronic parking brake system automatic release control method according to any one of claims 1 to 7 is implemented.

10. A vehicle, characterized in that: The vehicle includes the electronic parking brake system automatic release control device according to claim 7 or the electronic device according to claim 8.

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