Commercial vehicle electronic parking brake control method and apparatus

Abstract

The present disclosure relates to a commercial vehicle electronic parking brake control method and device. The method comprises: upon receiving an electronic parking enable request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal; upon receiving an electronic parking release request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal. The present disclosure has a simple structure, all throttle pedal signals, brake pedal signals, etc. are configurations possessed by existing cars, without the need for additional increase, simple structure, easy to implement.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of vehicle braking, in particular, to a commercial vehicle electronic parking brake control method and device. BACKGROUND

[0002] Cars will travel on different road surfaces, and there will often be sloping road surfaces in urban roads or mountainous areas. The parking brake system is to make the parked car stable on various road conditions (including on the ramp). Currently, the parking type of the car has mechanical hand brake and electronic parking brake, which is widely used in various cars.

[0003] The existing commercial vehicle is generally low-cost vehicle using mechanical hand brake parking, and the mechanical hand brake parking must be manually pulled. If forgotten, it may lead to the phenomenon of hill rolling. When the vehicle starts, it also needs to be manually released, otherwise it will cause the problem of brake drag, resulting in friction burning, abnormal wear.

[0004] Therefore, one or more methods are needed to solve the above problems.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] The purpose of the present disclosure is to provide a commercial vehicle electronic parking brake control method and device, thereby at least partially overcoming one or more problems caused by the limitations and defects of the related art.

[0007] According to one aspect of the present disclosure, a commercial vehicle electronic parking brake control method is provided, comprising:

[0008] Upon receiving an electronic parking enable request signal, detecting vehicle speed, vehicle switch information, and vehicle gear information to determine the vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal;

[0009] Upon receiving an electronic parking release request signal, detecting vehicle speed, vehicle switch information, and vehicle gear information to determine the vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal.

[0010] In an exemplary embodiment of the present disclosure, the method further comprises:

[0011] Detecting vehicle speed, vehicle switch information, vehicle gear information to determine vehicle state, the vehicle state includes static state, off state, starting state, running state.

[0012] In an exemplary embodiment of the present disclosure, when the vehicle state is a static state in the method:

[0013] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated;

[0014] Based on the electronic parking enable control signal, the parking brake is controlled to perform clamping action;

[0015] Detect the parking force of the parking brake, when the parking force is greater than the preset parking force, stop the clamping action of the parking brake, complete the electronic parking enable control of the vehicle.

[0016] In an exemplary embodiment of the present disclosure, when the vehicle state is a static state in the method:

[0017] Based on the electronic parking release request signal, an electronic parking release control signal is generated;

[0018] Based on the electronic parking enable control signal, the parking brake is controlled to perform clamping action;

[0019] Detect the parking force of the parking brake, when the parking force is greater than the preset parking force, stop the clamping action of the parking brake, complete the electronic parking enable control of the vehicle.

[0020] In an exemplary embodiment of the present disclosure, when the vehicle state is an off state in the method:

[0021] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated;

[0022] Determine the electronic parking release request signal, if the electronic parking release request signal is greater than 2 seconds, stop executing the electronic parking enable control signal, otherwise based on the electronic parking enable control signal, the parking brake is controlled to perform clamping action;

[0023] Detect the parking force of the parking brake, when the parking force is greater than the preset parking force, stop the clamping action of the parking brake, complete the electronic parking enable control of the vehicle.

[0024] In an exemplary embodiment of the present disclosure, when the vehicle state is a starting state in the method:

[0025] Based on the electronic parking release request signal, an electronic parking release control signal is generated;

[0026] Based on the electronic parking enable control signal, the acceleration pedal displacement, the motor actual torque, and the motor speed are detected, and when the acceleration pedal displacement is greater than a preset displacement, the motor actual torque is greater than a preset torque, and the motor speed is greater than a preset speed, the parking brake is controlled to perform a loosening action;

[0027] The stroke of the parking brake is detected, and when the stroke of the parking brake is greater than a preset distance, the loosening action of the parking brake is stopped, and the electronic parking release control of the vehicle is completed.

[0028] In an exemplary embodiment of the present disclosure, when the vehicle state is a driving state in the method:

[0029] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated;

[0030] When the vehicle speed is greater than 3 km / h, the parking brake is controlled to perform a clamping action based on the electronic parking enable control signal;

[0031] The parking force of the parking brake is detected, and when the parking force is greater than a preset parking force, the clamping action of the parking brake is stopped, and the electronic parking enable control of the vehicle is completed.

[0032] When the electronic parking enable request signal is revoked, an electronic parking release control signal is generated, and the electronic parking release control of the vehicle is completed based on the electronic parking release control signal.

[0033] In an exemplary embodiment of the present disclosure, when the vehicle state is a driving state in the method:

[0034] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated;

[0035] When the vehicle speed is less than 3 km / h, the parking brake is controlled to perform a clamping action based on the electronic parking enable control signal;

[0036] Based on a preset rule, the control of the parking brake to perform a clamping action is adjusted to realize a vehicle anti-lock function.

[0037] When the electronic parking enable request signal is revoked, an electronic parking release control signal is generated, and the electronic parking release control of the vehicle is completed based on the electronic parking release control signal.

[0038] In an exemplary embodiment of the present disclosure, the method further comprises:

[0039] In the electronic parking release state of the vehicle, when the electronic parking release request signal is received again within 5 seconds after the electronic parking release request signal is continuously received for more than 15 seconds, an electronic parking release control signal is generated, and the parking brake is controlled to perform a release action based on the electronic parking enable control signal until the parking brake is released to a fully released state.

[0040] In the electronic parking release state of the vehicle, when the electronic parking release request signal is received again within 5 seconds after the electronic parking release request signal is continuously received for more than 15 seconds, an electronic parking release control signal is generated, and the parking brake is controlled to perform a release action based on the electronic parking enable control signal until the parking brake is released to a fully released state.

[0041] In an exemplary embodiment of the present disclosure, the method further comprises:

[0042] When the parking brake is in the fully released state, upon receiving an exit vehicle diagnosis request signal, an electronic parking enable control signal and an electronic parking release control signal are generated, and the parking brake is controlled to perform a preset clamping and releasing action.

[0043] When the parking brake is in the fully released state, upon receiving an electronic parking enable request signal, an electronic parking enable control signal and an electronic parking release control signal are generated, and the parking brake is controlled to perform a preset clamping and releasing action.

[0044] In one aspect of the present disclosure, a commercial vehicle electronic parking brake control device is provided, comprising:

[0045] An electronic parking enable module is configured to, upon receiving an electronic parking enable request signal, detect vehicle speed, vehicle switch information, and vehicle gear information to determine the state of the vehicle, generate an electronic parking enable control signal based on the state of the vehicle, and complete electronic parking enable control of the vehicle based on the electronic parking enable control signal.

[0046] An electronic parking release module is configured to, upon receiving an electronic parking release request signal, detect vehicle speed, vehicle switch information, and vehicle gear information to determine the state of the vehicle, generate an electronic parking release control signal based on the state of the vehicle, and complete electronic parking release control of the vehicle based on the electronic parking release control signal.

[0047] The commercial vehicle electronic parking brake control method in one of the example embodiments of the present disclosure, wherein the method comprises: when an electronic parking enable request signal is received, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal; when an electronic parking release request signal is received, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal. The present disclosure realizes electronic parking function and different logic strategies formulated for different functions for commercial vehicles; simple structure, low cost, improves the safety of the whole vehicle and the safety of the driver operating the vehicle.

[0048] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0049] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0050] Figure 1 A flow chart of a commercial vehicle electronic parking brake control method according to an example embodiment of the present disclosure is shown;

[0051] Figure 2 An electronic parking structure block diagram of a commercial vehicle electronic parking brake control method according to an example embodiment of the present disclosure is shown;

[0052] Figure 3 An electronic parking structure schematic diagram of a commercial vehicle electronic parking brake control method according to an example embodiment of the present disclosure is shown;

[0053] Figure 4 A schematic block diagram of a commercial vehicle electronic parking brake control device according to an example embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0054] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted for the sake of brevity.

[0055] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the techniques described can be practiced without one or more of the specific details, or with other methods, components, materials, apparatus, steps, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the disclosure.

[0056] The block diagrams in the drawings show only the functionality of the features and can not imply a particular order of execution. In some cases, the functions of features can be combined separately, divided into separate components, performed by many components, or omitted entirely. In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the techniques described can be practiced without one or more of the specific details, or with other methods, components, materials, apparatus, steps, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the disclosure.

[0057] In the present example embodiment, a commercial vehicle electronic parking brake control method is first provided; with reference to Figure 1 The commercial vehicle electronic parking brake control method can include the following steps:

[0058] Step S110, upon receiving an electronic parking enable request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal;

[0059] Step S120, upon receiving an electronic parking release request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine the vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal.

[0060] The commercial vehicle electronic parking brake control method in one of the example embodiments of the present disclosure, wherein the method comprises: when receiving an electronic parking enable request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal; when receiving an electronic parking release request signal, detecting vehicle speed, vehicle switch information, vehicle gear information to determine vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal. The present disclosure realizes electronic parking function and different logic strategies for different functions for commercial vehicles; simple structure, low cost, improves the safety of the whole vehicle and the safety of the driver operating the vehicle.

[0061] In the following, a commercial vehicle electronic parking brake control method in the example embodiment will be further described.

[0062] In the example embodiment, as shown in Figure 2 The principle block diagram of the electronic parking brake system EPB, when the car is on the slope, the EPB assembly realizes different functions through different working conditions by collecting throttle pedal signal, brake pedal signal, EPB switch signal, wheel speed signal, etc. And display the corresponding light signal on the instrument.

[0063] In the example embodiment, as shown in Figure 3As shown, it is a schematic diagram of the principle structure of an electronic parking brake system EPB. The EPB controller replaces the traditional hand brake, connects the parking pull wire and the parking brake, pulls up or releases the parking switch, and provides a signal to the EPB controller for corresponding instructions and actions, thereby realizing parking brake and parking release. The EPB controller is a stepper motor as the power element of the pull wire EPB. The motor output shaft is connected with a gear set. The motor torque is connected with the screw nut mechanism after being reduced and increased in torque by the gear set. The screw nut mechanism converts the rotary motion of the motor into linear displacement motion. When the motor rotates forward, the screw nut mechanism moves to the left, driving the pull buckle and the pull wire to stretch into the EPB, realizing tensioning and completing parking. When the motor stops rotating, the screw nut mechanism is in a self-locking state, maintaining the parking state. When the motor reverses, the screw nut mechanism drives the pull buckle to move to the right, releasing the parking actuator and completing the release. The tension sensor is connected with the screw nut. The tension sensor is subjected to the reaction force of the screw nut mechanism, so it can measure the tension on the pull wire. When the tensioning action is performed, the controller will take the tension as the control target and complete the tensioning action when the target tension is reached. When the motor reverses a certain distance, the controller will complete the actuator wear compensation learning once for each tensioning action. A stroke sensor is arranged at the first and last ends of the screw guide barrel to prevent damage to the mechanism caused by excessive tightening and excessive release of the EPB and to increase fault redundancy.

[0064] In step S110, when an electronic parking enable request signal is received, the vehicle speed, vehicle switch information, and vehicle gear information are detected to determine the vehicle state. Based on the vehicle state, an electronic parking enable control signal is generated, and based on the electronic parking enable control signal, electronic parking enable control of the vehicle is completed.

[0065] In step S120, when an electronic parking release request signal is received, the vehicle speed, vehicle switch information, and vehicle gear information are detected to determine the vehicle state. Based on the vehicle state, an electronic parking release control signal is generated, and based on the electronic parking release control signal, electronic parking release control of the vehicle is completed.

[0066] In the embodiment of the present example, the method further comprises:

[0067] The vehicle speed, vehicle switch information, and vehicle gear information are detected to determine the vehicle state, and the vehicle state includes a stationary state, an engine off state, a starting state, and a driving state.

[0068] In the embodiment of the present example, when the vehicle state is a stationary state in the method:

[0069] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated.

[0070] controlling the parking brake to perform a clamping action based on the electronic parking enable control signal;

[0071] detecting a parking force of the parking brake, and stopping the clamping action of the parking brake when the parking force is greater than a preset parking force, to complete the electronic parking enable control of the vehicle.

[0072] In the embodiment of the present example, each wheel speed signal is provided by an ABS (anti-lock braking system) controller, the VCU is a vehicle controller, the TCU is a motor controller, and a gear signal can be provided. In a parking release state, when the vehicle speed is lower than 3 km / h and a request from an EPB switch is received, the actuator is controlled to perform a clamping action until the parking force reaches a predetermined target parking force, and then the clamping action is stopped, and the parking clamping time is less than or equal to 1.3 s.

[0073] In the embodiment of the present example, when the vehicle state is a stationary state in the method:

[0074] generating an electronic parking release control signal based on an electronic parking release request signal;

[0075] controlling the parking brake to perform a releasing action based on the electronic parking release control signal;

[0076] detecting a stroke of the parking brake, and stopping the releasing action of the parking brake when the stroke of the parking brake is greater than a preset distance, to complete the electronic parking release control of the vehicle.

[0077] In the embodiment of the present example, in a parking state, when a Release request from an EPB switch is received, the actuator is controlled to perform a releasing action until the release reaches a set distance, and then the releasing action is stopped, and the parking release execution time is less than or equal to 1.3 s.

[0078] In the embodiment of the present example, when the vehicle state is an engine-off state in the method:

[0079] generating an electronic parking enable control signal based on an electronic parking enable request signal;

[0080] judging an electronic parking release request signal, and if the electronic parking release request signal is greater than 2 seconds, stopping the execution of the electronic parking enable control signal, otherwise controlling the parking brake to perform a clamping action based on the electronic parking enable control signal;

[0081] detecting a parking force of the parking brake, and stopping the clamping action of the parking brake when the parking force is greater than a preset parking force, to complete the electronic parking enable control of the vehicle.

[0082] In the embodiment of the present example, in the parking release state, when the vehicle speed is lower than 3 km / h, the hard-wired connection IGN angle voltage is less than or equal to 6.5V is received, the actuator is controlled to perform the parking action until the parking force reaches the predetermined target parking force, and then the parking action is stopped, and the parking clamping time is less than or equal to 1.3s, and if the EPB switch signal Release state is received simultaneously for more than or equal to 2s, the clamping action is not performed.

[0083] In the embodiment of the present example, in the method, when the vehicle state is the starting state:

[0084] Based on the electronic parking release request signal, an electronic parking release control signal is generated;

[0085] Based on the electronic parking enable control signal, the displacement of the accelerator pedal, the actual torque of the motor, and the rotation speed of the motor are detected, and when the displacement of the accelerator pedal is greater than a preset displacement, the actual torque of the motor is greater than a preset torque, and the rotation speed of the motor is greater than a preset rotation speed, the parking brake is controlled to perform the release action;

[0086] The stroke of the parking brake is detected, and when the stroke of the parking brake is greater than a preset distance, the release action of the parking brake is stopped, and the electronic parking release control of the vehicle is completed.

[0087] In the embodiment of the present example, in the parking state, when the displacement of the accelerator pedal, the actual torque of the motor, and the rotation speed of the motor all exceed the predetermined values, the actuator is controlled to perform the release action until the release distance reaches the set distance, and then the release action is stopped, and the parking solution execution time is less than or equal to 1.3s.

[0088] In the embodiment of the present example, in the method, when the vehicle state is the driving state:

[0089] Based on the electronic parking enable request signal, an electronic parking enable control signal is generated;

[0090] When the vehicle speed is greater than 3 km / h, the parking brake is controlled to perform the clamping action based on the electronic parking enable control signal;

[0091] The parking force of the parking brake is detected, and when the parking force is greater than a preset parking force, the clamping action of the parking brake is stopped, and the electronic parking enable control of the vehicle is completed.

[0092] When the electronic parking enable request signal is revoked, an electronic parking release control signal is generated, and the electronic parking release control of the vehicle is completed based on the electronic parking release control signal.

[0093] In the embodiment of the present example, in the method, when the vehicle state is the driving state:

[0094] generating an electronic parking enable control signal based on the electronic parking enable request signal;

[0095] controlling the parking brake to perform a clamping action based on the electronic parking enable control signal when the vehicle speed is less than 3 km / h;

[0096] adjusting the control of the parking brake to perform the clamping action to achieve an anti-lock braking function based on a preset rule;

[0097] generating an electronic parking release control signal when the electronic parking enable request signal is revoked, and completing the electronic parking release control of the vehicle based on the electronic parking release control signal.

[0098] In the embodiment of the present example, in the vehicle running state, when the Apply switch button of the EPB switch receives a parking request under the condition that the speed is higher than 3 km / h, the controller controls the actuator to perform a clamping action until the request of the EPB switch is revoked or the wheel speed of the vehicle is less than 3 km / h, and the clamping force is automatically adjusted during the clamping process to prevent the rear wheels from being locked, and the average deceleration of the high adhesion road surface is greater than 0.2g.

[0099] In the embodiment of the present example, the method further comprises:

[0100] In the electronic parking release state of the vehicle, when a vehicle diagnosis request signal is received, an electronic parking release control signal is generated, and the parking brake is controlled to perform a loosening action until the parking brake is released to a fully released state based on the electronic parking enable control signal;

[0101] In the electronic parking release state of the vehicle, when the electronic parking release request signal is received again within 5 seconds after the electronic parking release request signal is continuously received for more than 15 seconds, an electronic parking release control signal is generated, and the parking brake is controlled to perform a loosening action until the parking brake is released to a fully released state based on the electronic parking enable control signal.

[0102] In the embodiment of the present example, the method further comprises:

[0103] When the parking brake is in the fully released state, an electronic parking enable control signal and an electronic parking release control signal are generated when a vehicle diagnosis request signal is received, and the parking brake is controlled to perform a preset clamping and loosening action;

[0104] When the parking brake is in the fully released state, an electronic parking enable control signal and an electronic parking release control signal are generated when an electronic parking enable request signal is received, and the parking brake is controlled to perform a preset clamping and loosening action.

[0105] In the embodiment of the present example, in the parking release state, when a diagnostic request EnterMaintenanceMode is accepted, or the EPB switch remains in the Release state for 10-15s, and the EPB switch is in the Release state again within the next 5s, the controller performs release until the parking mechanism is released to the end position. In the fully released state, when a diagnostic request ExitMaintenanceMode is accepted, or the EPB switch is in the Apply state, the controller performs a normal clamping and loosening action once, and finally maintains the parking release state.

[0106] In the embodiment of the present example, the structure of the application is simple, all throttle pedal signals, brake pedal signals, etc. are configurations possessed by existing cars, without the need for additional increase, simple structure, easy to implement; high practicality, low cost, reliable structure, solves the problems caused by slope starting assistance, forgetting to park or forgetting to release the parking brake; by implementing different functions to develop corresponding strategies, the function logic is clear, and can be applied to different vehicle models.

[0107] It should be noted that although the steps of the method in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in this specific order, or that all of the steps shown must be performed to achieve the desired result. In addition or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be divided into multiple steps, etc.

[0108] In addition, in the embodiment of the present example, a commercial vehicle electronic parking brake control device is also provided. Referring to Figure 4 As shown in the figure, the commercial vehicle electronic parking brake control device 400 can include an electronic parking enable module 410 and an electronic parking release module 420. Wherein:

[0109] The electronic parking enable module 410 is configured to, when receiving an electronic parking enable request signal, detect vehicle speed, vehicle switch information, and vehicle gear information to determine the vehicle state, generate an electronic parking enable control signal based on the vehicle state, and complete electronic parking enable control of the vehicle based on the electronic parking enable control signal;

[0110] The electronic parking release module 420 is configured to, when receiving an electronic parking release request signal, detect vehicle speed, vehicle switch information, and vehicle gear information to determine the vehicle state, generate an electronic parking release control signal based on the vehicle state, and complete electronic parking release control of the vehicle based on the electronic parking release control signal.

[0111] The specific details of each of the above-described modules of the electronic parking brake control device of the commercial vehicle have been described in detail in the corresponding method of controlling the electronic parking brake of the commercial vehicle, and thus will not be described again here.

[0112] It should be noted that, although several modules or units of the electronic parking brake control device 400 of the commercial vehicle are mentioned in the above detailed description, such a division is not mandatory. Indeed, according to embodiments of the present disclosure, the features and functionalities of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functionalities of one module or unit described above can be further divided into embodied by a plurality of modules or units.

[0113] Furthermore, the above-described figures are merely schematic illustrations of the processes included in the method according to exemplary embodiments of the present application, and are not intended for limiting purposes. It is readily understood that the processes shown in the above-described figures do not indicate or limit the chronological order of these processes. In addition, it is readily understood that these processes can be executed, for example, synchronously or asynchronously in a plurality of modules.

[0114] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon considering the specification and practice of the present disclosure. The present application is intended to cover any variations, uses, or adaptations of the present disclosure following, in general, the principles of the present disclosure and including such departures from the present disclosure that come within known or customary practice in the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0115] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is indicated by the appended claims.

Claims

1. A commercial vehicle electronic parking brake control method, characterized by, The method comprises: Upon receiving an electronic parking enable request signal, detecting vehicle speed, vehicle switch information and vehicle gear information to determine the vehicle state, generating an electronic parking enable control signal based on the vehicle state, and completing electronic parking enable control of the vehicle based on the electronic parking enable control signal; Upon receiving an electronic parking release request signal, detecting vehicle speed, vehicle switch information and vehicle gear information to determine the vehicle state, generating an electronic parking release control signal based on the vehicle state, and completing electronic parking release control of the vehicle based on the electronic parking release control signal; When the vehicle state is a running state: Based on the electronic parking enable request signal, an electronic parking enable control signal is generated; When the vehicle speed is greater than 3 km / h, the parking brake is controlled to perform a clamping action based on the electronic parking enable control signal; The parking force of the parking brake is detected, and when the parking force is greater than a preset parking force, the clamping action of the parking brake is stopped, and the electronic parking enable control of the vehicle is completed; When the electronic parking enable request signal is revoked, an electronic parking release control signal is generated, and electronic parking release control of the vehicle is completed based on the electronic parking release control signal; When the vehicle state is a running state: Based on the electronic parking enable request signal, an electronic parking enable control signal is generated; When the vehicle speed is less than 3 km / h, the parking brake is controlled to perform a clamping action based on the electronic parking enable control signal; The control of the parking brake to perform a clamping action is adjusted based on a preset rule to realize a vehicle anti-lock function; When the electronic parking enable request signal is revoked, an electronic parking release control signal is generated, and electronic parking release control of the vehicle is completed based on the electronic parking release control signal.

2. The commercial vehicle electronic park brake control method of claim 1, wherein, The method further comprises: Detecting vehicle speed, vehicle switch information, and vehicle gear information to determine the vehicle state, the vehicle state including a stationary state, an engine-off state, a starting state, and a running state.

3. The commercial vehicle electronic park brake control method of claim 2, wherein, In the method, when the vehicle state is a stationary state: Based on the electronic parking enable request signal, an electronic parking enable control signal is generated; The parking brake is controlled to perform a clamping action based on the electronic parking enable control signal; The parking force of the parking brake is detected, and when the parking force is greater than a preset parking force, the clamping action of the parking brake is stopped, and the electronic parking enable control of the vehicle is completed.

4. The commercial vehicle electronic park brake control method of claim 2, wherein, In the method, when the vehicle state is a stationary state: Based on the electronic parking release request signal, an electronic parking release control signal is generated; The parking brake is controlled to perform a release action based on the electronic parking enable control signal; The stroke of the parking brake is detected, and when the stroke of the parking brake is greater than a preset distance, the release action of the parking brake is stopped, and the electronic parking release control of the vehicle is completed.

5. The commercial vehicle electronic park brake control method of claim 2, wherein, In the method, when the vehicle state is an engine-off state: Based on the electronic parking enable request signal, an electronic parking enable control signal is generated; judging an electronic parking release request signal, if the electronic parking release request signal is greater than 2 seconds, stopping the electronic parking enable control signal, otherwise, controlling the parking brake to perform a clamping action based on the electronic parking enable control signal; detecting a parking force of the parking brake, when the parking force is greater than a preset parking force, stopping the clamping action of the parking brake, and completing the electronic parking enable control of the vehicle.

6. The commercial vehicle electronic park brake control method of claim 2, wherein, In the method, when the vehicle state is a starting state: generating an electronic parking release control signal based on an electronic parking release request signal; detecting an accelerator pedal displacement, an actual motor torque, and a motor speed based on the electronic parking enable control signal, when the accelerator pedal displacement is greater than a preset displacement, the actual motor torque is greater than a preset torque, and the motor speed is greater than a preset speed, controlling the parking brake to perform a release action; detecting a stroke of the parking brake, when the stroke of the parking brake is greater than a preset distance, stopping the release action of the parking brake, and completing the electronic parking release control of the vehicle.

7. The commercial vehicle electronic park brake control method of claim 1, wherein, The method further comprises: in a vehicle electronic parking release state, when a vehicle diagnosis request signal is received, generating an electronic parking release control signal, and controlling the parking brake to perform a release action based on the electronic parking enable control signal until the parking brake is released to a fully released state; in a vehicle electronic parking release state, when the electronic parking release request signal is received again within 5 seconds after the electronic parking release request signal is continuously received for more than 15 seconds, generating an electronic parking release control signal, and controlling the parking brake to perform a release action based on the electronic parking enable control signal until the parking brake is released to a fully released state.

8. The commercial vehicle electronic park brake control method of claim 7 wherein, The method further comprises: when the parking brake is in a fully released state, and a vehicle diagnosis request signal is received, generating an electronic parking enable control signal and an electronic parking release control signal, and controlling the parking brake to perform a preset clamping and release action; when the parking brake is in a fully released state, and an electronic parking enable request signal is received, generating an electronic parking enable control signal and an electronic parking release control signal, and controlling the parking brake to perform a preset clamping and release action.

9. A commercial vehicle electronic parking brake control device using the control method according to any one of claims 1 to 8, characterized by The device comprises: an electronic parking enable module, configured to, when an electronic parking enable request signal is received, detect a vehicle speed, vehicle switch information, and vehicle gear information to determine a vehicle state, generate an electronic parking enable control signal based on the vehicle state, and complete the electronic parking enable control of the vehicle based on the electronic parking enable control signal; an electronic parking release module, configured to, when an electronic parking release request signal is received, detect a vehicle speed, vehicle switch information, and vehicle gear information to determine a vehicle state, generate an electronic parking release control signal based on the vehicle state, and complete the electronic parking release control of the vehicle based on the electronic parking release control signal.

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