CN111469830B - Electronic parking control method, device, controller, system and vehicle - Google Patents
Electronic parking control method, device, controller, system and vehicle Download PDFInfo
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- CN111469830B CN111469830B CN201910068160.2A CN201910068160A CN111469830B CN 111469830 B CN111469830 B CN 111469830B CN 201910068160 A CN201910068160 A CN 201910068160A CN 111469830 B CN111469830 B CN 111469830B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
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Abstract
The invention discloses a control method, a control device, a controller, a control system and a vehicle for electronic parking, wherein the control method for electronic parking comprises the following steps: when the current state of the electronic parking brake system is detected to be a parking state and the gear information is non-P gear information, the electronic parking brake system executes a releasing action; when the current state of the electronic parking brake system is detected to be a release state and the vehicle is in a vehicle static state, the gear information is detected to be P gear information, or the user intention information is detected to be parking intention information, and the electronic parking brake system executes parking action. The problem that misoperation is easy to occur when a P gear signal is used for activating electronic parking at present and electronic parking cannot be well controlled is solved, and the electronic parking control method can avoid misoperation while conforming to the operation habit of a user.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method, a control device, a control system and a vehicle for electronic parking.
Background
The P gear is the most common gear in an automatic transmission vehicle, and is generally arranged at the forefront position of a gear operating platform and in front of the R gear, so that the purpose of locking an axle through the gear when the vehicle is at a standstill on a ramp is achieved. The 'P' in the gear P is derived from the first letter in English vocabulary park, so that the gear P is the identifier of the parking gear in the gear of the automatic transmission automobile. The P gear is a gear evolved on the basis of the N gear, and besides the transmission is placed in a neutral gear mode to work, a pawl is arranged in the transmission case to buckle a gear on an output shaft to form a mechanical lock, so that a driving wheel shaft is clamped to play a role in fixing a static or jogging vehicle. Although the frequency of the gear P is extremely high in the automatic transmission type, the gear P does not belong to three main standard gears of an automatic transmission car. The reason is that some vehicle types adopt an N-gear additional auxiliary brake device mode to park, but the basic working principle of the vehicle type is almost the same as that of a P-gear. The difference between gear P and gear N is that gear P has a parking lock mechanism and gear N does not, but they both have the property of neutral. However, many users have a habit of operating the P-shift, and canceling the P-shift does not conform to the habit of operating the users, which affects the operation experience of the users.
However, maintaining P range is also problematic. Specifically, the P range is actually Park, and electronic Parking (Electrical Park Brake) is a technology for realizing Parking Brake by an electronic control method. Therefore, when the P range is reserved, the operation is complex for the user, the P range and the electronic parking are actually the meaning of Park, the user needs to operate twice and input two kinds of operation, but only one execution result is obtained, and the operation is easy to confuse for the user. This is contrary to the original intention of initially reserving P-range to meet user operating habits.
In order to meet the operation habit of a user, a control method for activating electronic parking through a P-gear signal is already available, but the electronic parking activated through the P-gear signal is easy to be executed mistakenly, and the electronic parking cannot be reliably realized. Specifically, there may be a case where the related art cannot judge that the user has operated erroneously, or that the P range signal cannot accurately reflect the user's intention, resulting in that an operation that the user does not intend to be performed is performed. In the face of such a situation, the electronic parking control method can avoid the misoperation while conforming to the operation habit of the user.
Disclosure of Invention
The embodiment of the invention provides a control method, a control device, a controller, a control system and a vehicle for electronic parking, which can effectively solve the technical problem that the electronic parking is easy to be executed mistakenly in order to meet the operation habit of a user in the prior art.
An embodiment of the present invention provides a method for controlling electronic parking, including:
when the current state of the electronic parking brake system is detected to be a parking state and the gear information is non-P gear information, the electronic parking brake system executes a releasing action;
when the current state of the electronic parking brake system is detected to be a release state and the vehicle is in a vehicle static state, the gear information is detected to be P gear information, or the user intention information is detected to be parking intention information, and the electronic parking brake system executes parking action.
Compared with the prior art, the electronic parking control method provided by the invention has the advantages that the traditional P gear lock is cancelled, only one actuator is arranged in the parking part, namely, the electronic parking is realized, the manufacturing cost is reduced, and meanwhile, the fact that a user cannot really engage the P gear is caused. In addition, the electronic parking actuator is controlled by the P-gear switch without an electronic parking switch, so that the operation of a user is simplified, the understanding difficulty is reduced, and the electronic parking conforming to the operation habit of the user is realized. Meanwhile, the invention not only judges the action which should be executed by the electronic parking brake system through the gear information, but also judges cooperatively through the vehicle state information, wherein the vehicle state information is a general name of all information representing the vehicle state, and specifically comprises gear information, user intention information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information, but is not limited to the above information. Meanwhile, user intention information is introduced, user operation intention is further judged by detecting the user intention information, and the action of electronic parking is controlled by referring to the introduced user intention information, so that the possibility of misoperation is reduced, the problems that misoperation is easily caused when a P-gear signal is used for activating electronic parking at present and the electronic parking cannot be well controlled are solved, and the electronic parking control method which accords with the operation habit of a user and can avoid the misoperation is provided.
As an improvement of the above scheme, the non-P-range information is R-range information or D-range information.
In a preferred embodiment of the present invention, when the detected non-P-range information does not include N-range information, the P-range lock is not set in the present invention, and if the user operates the P-range to change to the N-range, no operation is performed, and only a shift operation is performed, so that the vehicle may slip. In order to reduce the possibility of slope slipping, the electronic parking brake system does not execute the releasing action in the N gear, and only executes the releasing action in the R gear or the D gear, and at the moment, a driver can sense the movement of the vehicle, so that subsequent operation is carried out, and the possibility of misoperation is reduced.
As an improvement of the above solution, when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P-shift information, the electronic parking brake system executes a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, user intention information is detected, and when the gear information is detected to be R gear information or D gear information and the user intention information is detected to be driving intention information, the electronic parking brake system executes releasing action.
In a preferred embodiment of the present invention, the electronic parking brake system is required to perform the release operation only when the user intention information is detected as the driving intention information, instead of detecting the R range information or the D range information as the condition for performing the release operation by the electronic parking brake system. The driving intention information is detected when the user steps on the accelerator in the embodiment, and in the embodiment, the step-on of the accelerator by the user is used as a condition for the electronic parking brake system to execute a release action, so that misoperation of the user can be further avoided, and the parking safety is ensured. Specifically, although the driver can sense the movement of the vehicle when the release action is performed in the R-range or the D-range, and thus perform subsequent operations, the possibility of incorrect operations is reduced, but the possibility of incorrect operations by the user is not excluded, and vehicle rolling can also occur if the user does not perform operations after the release action is performed in the R-range or the D-range. In contrast, in a preferred embodiment of the present invention, the step-on of the accelerator by the user is used as a condition for executing the release action of the electronic parking brake system, and the execution action of the electronic parking brake system is controlled through clear user intention information, so that the possibility of misoperation is avoided, and the parking safety of the user is ensured.
As an improvement of the above solution, when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P-shift information, the electronic parking brake system executes a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information are detected, whether the brake pressure under the current parking ramp is enough or not is judged according to the parking ramp information and the brake pressure information, and when the power supply of the vehicle is detected to be the power-on state, the vehicle brake is the stepping-on state and the brake pressure under the current parking ramp is enough, the electronic parking brake system executes a releasing action.
In a preferred embodiment of the present invention, a plurality of information, such as vehicle power information, vehicle braking information, parking ramp information, and brake pressure information, is detected to cooperatively determine whether the electronic parking brake system performs a release operation. Specifically, although it is possible to avoid erroneous operation and ensure safety by determining whether or not the electronic parking brake system performs the release operation based on the user intention information, it is necessary for the user to perform an operation that can indicate an intention, which may complicate the user operation and may not conform to the user's operation habit. In contrast, in the present embodiment, a safety and convenience determination method is provided, where when it is detected that a vehicle power supply is in a power-on state, a vehicle brake is in a stepping-on state, and when a brake pressure of a current parking slope is sufficient, an electronic parking brake system executes a release action, where the electronic parking brake system executes the release action and releases the electronic parking brake system and converts the electronic parking brake system into an R gear or a D gear. In practical use, the gear P is in gear D, the vehicle is bound to leave, the gear is in gear power ON, and the judgment is to prevent misjudgment and avoid vehicle slipping. Ramp information is also considered in the embodiment, when the brake pressure under the current parking ramp is enough, the electronic parking brake system executes the release action, and on the premise of ensuring safety, the simplified user operation is realized, and the operation habit of the user is fitted.
As an improvement of the above, the control method further includes:
when detecting the trigger of a P-gear switch, detecting the current state and the vehicle speed of the electronic parking brake system;
when the current state of the electronic parking brake system is a release state and the vehicle speed is not greater than the dynamic brake threshold value, the electronic parking brake system executes a parking action;
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than a dynamic brake threshold value, detecting whether a P-gear switch keeps a trigger state;
when detecting that the P-gear switch does not keep a trigger state, sending a prompt that the dynamic braking condition is not met, and not executing a parking action;
when the P-gear switch is detected to be kept in a trigger state, the electronic parking brake system executes a deceleration action, and when the electronic parking brake system executes the deceleration action and detects that the P-gear switch is in a trigger state, the electronic parking brake system quits the deceleration action and executes a release action.
In a preferred aspect of the present invention, the electronic parking brake system is controlled to perform different operations according to the P-stop switch and the vehicle speed while the vehicle is in motion. Whether the electronic parking brake system executes the parking action or not can be judged through gear information or user intention information when the vehicle is in a static state, but in practical use, the electronic parking brake system does not always wait for the vehicle to be in the static state for parking, and direct parking when the vehicle moves is also an operation habit of many users. In this regard, the electronic parking brake system performs different operations according to a P-range switch, which is essentially a user operation request, may be an actual switch, and may be a specific position of a shift lever, and a vehicle speed control. In the embodiment, when a vehicle is in a moving state, whether a user has an operation request is judged through a P-gear switch, when the vehicle speed is small (not greater than a dynamic braking threshold value), the current user request is judged to be an effective user request, the user has a parking intention, and an electronic parking braking system executes a parking action; this is because, when the vehicle speed is low, it is possible to estimate that there is currently an intention to park, and at this time, there is a low possibility that the user has made an operation request as an erroneous operation, and therefore, the parking operation is executed considering that the operation is valid at this time. When the vehicle speed is large (larger than a dynamic braking threshold value), further judging the operation intention of a user by detecting whether the P-gear switch keeps a trigger state, and if the P-gear switch does not keep the trigger state, sending a prompt that the dynamic braking condition is not met and not executing a parking action; this is because, when the vehicle speed is high, the operation request sent by the user may be a wrong operation, for example, the P-stop switch is pressed carelessly during driving, and in order to determine whether the operation is a wrong operation, a further determination is needed, that is, whether the P-stop switch is kept in a trigger state is detected, if the user is a wrong operation, the P-stop switch is pressed carelessly, the operation should be stopped soon, so that when it is detected that the P-stop switch is not kept in the trigger state, the wrong operation is determined, the parking operation is not performed, and the driving is not affected; however, it is also possible that the user really needs to park, and after the P-range switch is pressed, the user mistakenly regards that the parking is executed, and the user is about to leave the vehicle, which may cause a vehicle slipping risk. When the vehicle speed is large (larger than a dynamic braking threshold value), if the P-gear switch is detected to be kept in a trigger state, the electronic parking braking system executes a deceleration action, and when the electronic parking braking system executes the deceleration action and detects that the P-gear switch is finished in the trigger state, the electronic parking braking system quits the deceleration action and executes a release action; the reason is that the user continuously presses the P-range switch to indicate that the user has a clear parking intention, the electronic parking brake system performs a deceleration action at the moment, when the vehicle speed is reduced to be not more than the dynamic brake threshold value due to continuous deceleration, the parking action is performed to realize the user intention, and if the user does not press the P-range switch any more in the deceleration process to indicate that the user gives up the parking intention, the electronic parking brake system quits the deceleration action to perform a release action. In the embodiment, whether the P-gear switch is triggered or not, whether the trigger state is continuous or not, whether the vehicle speed is greater than the threshold value or not and other information are used for cooperatively judging the operation which should be executed by the electronic parking brake system, the occurrence of misoperation is avoided to a great extent, and the problem that the misoperation is easily caused when the electronic parking is activated by using the P-gear signal at present is solved.
As an improvement of the above solution, when the current state of the electronic parking brake system is a released state and the vehicle speed is greater than a dynamic braking threshold, detecting whether the P-range switch remains in a triggered state includes:
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than the dynamic brake threshold, judging whether the vehicle speed is not greater than an automatic deceleration threshold;
when the vehicle speed is detected to be not greater than the automatic deceleration threshold value, the electronic parking brake system executes deceleration action;
and when the vehicle speed is detected to be greater than the automatic deceleration threshold value, detecting whether the P-gear switch keeps a trigger state.
In a preferred embodiment of the present invention, when the trigger of the P-range switch is detected and the vehicle speed is greater than the dynamic braking threshold, it is determined whether the vehicle speed is not greater than the automatic deceleration threshold. When the vehicle speed is greater than a dynamic braking threshold value, the operation intention of a user is judged through the state of a P-gear switch, the user is judged to have a definite parking intention only when the user keeps the P-gear switch triggered, the electronic parking braking system executes a deceleration action, the user can express the operation intention only by triggering the P-gear switch for a long time, the electronic parking braking system does not execute the parking action or recover to a release action possibly because the P-gear switch is not triggered for a long time, and the user who is used to realize parking by pressing the P-gear switch has the problems that the use habit is not met and misoperation is easy to occur. In contrast, in this embodiment, when the P-range switch is triggered and the vehicle speed is greater than the dynamic braking threshold, it is further determined whether the vehicle speed is not greater than the automatic deceleration threshold. If the vehicle speed is not greater than the automatic deceleration threshold value, the electronic parking braking system executes deceleration action, the vehicle speed is not very high at the moment, the electronic parking braking system decelerates automatically, and the electronic parking braking system does not need to press a P-gear switch for a long time to enter the deceleration action; when the vehicle speed is greater than the automatic deceleration threshold value, whether the P-gear switch keeps a trigger state is further detected, and the intention of a user is judged through the continuous state of the P-gear switch. In this embodiment, the user's usage habits are taken into account by further comparing whether the vehicle speed is not greater than the automatic deceleration threshold, and the impact caused by the misoperation is further reduced.
Another embodiment of the present invention correspondingly provides a control device for electronic parking, including:
the driving detection module is used for executing release action by the electronic parking brake system when detecting that the current state of the electronic parking brake system is a parking state and the gear information is non-P gear information;
and the parking detection module is used for detecting that the gear information is P gear information or detecting that the user intention information is parking intention information when detecting that the current state of the electronic parking brake system is a release state and the vehicle is in a vehicle static state, and executing parking action by the electronic parking brake system.
Another embodiment of the present invention provides a controller for electronic parking, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the control method for electronic parking according to the above-mentioned embodiment of the present invention when executing the computer program.
Another embodiment of the present invention provides a control system for electronic parking, including: the system comprises a controller, an electronic parking brake system, a P-gear switch and a vehicle state detection system; wherein the content of the first and second substances,
the vehicle state detection system is connected with the controller and is used for sending the detected vehicle state information to the controller;
the P-gear switch is connected with the controller and is used for sending the detected state information of the P-gear switch to the controller;
the electronic parking brake system is connected with the controller and is used for executing the action command sent by the controller;
the controller comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the controller realizes the control method of electronic parking according to the embodiment of the invention.
Another embodiment of the present invention provides a vehicle including the electronic parking control system according to the above embodiment of the present invention.
Compared with the prior art, the electronic parking control method, the electronic parking control device, the electronic parking control system and the vehicle provided by the embodiment of the invention have the advantages that the traditional P gear lock is cancelled, only one actuator is used for electronic parking in a parking part, the manufacturing cost is reduced, and meanwhile, a user cannot really engage in the P gear, but the P gear is reserved, the electronic parking is controlled through the gear information to execute the parking, so that the user can experience the engagement of the P gear, and the reservation of the operation habit of the user is realized. In addition, the electronic parking actuator is controlled by the P-gear switch without an electronic parking switch, so that the operation of a user is simplified, the understanding difficulty is reduced, and the electronic parking conforming to the operation habit of the user is realized. Meanwhile, the invention not only judges the action which should be executed by the electronic parking brake system through the gear information, but also judges cooperatively through the vehicle state information, wherein the vehicle state information is a general name of all information representing the vehicle state, and specifically comprises gear information, user intention information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information, but is not limited to the above information. Meanwhile, user intention information is introduced, user operation intention is further judged by detecting the user intention information, and the action of electronic parking is controlled by referring to the introduced user intention information, so that the possibility of misoperation is reduced, the problems that misoperation is easily caused when a P-gear signal is used for activating electronic parking at present and the electronic parking cannot be well controlled are solved, and the electronic parking control method which accords with the operation habit of a user and can avoid the misoperation is provided. Whether the electronic parking brake system executes the parking action or not can be judged through gear information or user intention information when the vehicle is in a static state, but in practical use, the electronic parking brake system does not always wait for the vehicle to be in the static state for parking, and direct parking when the vehicle moves is also an operation habit of many users. In this regard, the electronic parking brake system performs different operations according to a P-range switch, which is essentially a user operation request, may be an actual switch, and may be a specific position of a shift lever, and a vehicle speed control. In the embodiment, when a vehicle is in a moving state, whether a user has an operation request is judged through a P-gear switch, when the vehicle speed is small (not greater than a dynamic braking threshold value), the current user request is judged to be an effective user request, the user has a parking intention, and an electronic parking braking system executes a parking action; this is because, when the vehicle speed is low, it is possible to estimate that there is currently an intention to park, and at this time, there is a low possibility that the user has made an operation request as an erroneous operation, and therefore, the parking operation is executed considering that the operation is valid at this time. When the vehicle speed is large (larger than a dynamic braking threshold value), further judging the operation intention of a user by detecting whether the P-gear switch keeps a trigger state, and if the P-gear switch does not keep the trigger state, sending a prompt that the dynamic braking condition is not met and not executing a parking action; this is because, when the vehicle speed is high, the operation request sent by the user may be a wrong operation, for example, the P-stop switch is pressed carelessly during driving, and in order to determine whether the operation is a wrong operation, a further determination is needed, that is, whether the P-stop switch is kept in a trigger state is detected, if the user is a wrong operation, the P-stop switch is pressed carelessly, the operation should be stopped soon, so that when it is detected that the P-stop switch is not kept in the trigger state, the wrong operation is determined, the parking operation is not performed, and the driving is not affected; however, it is also possible that the user really needs to park, and after the P-range switch is pressed, the user mistakenly regards that the parking is executed, and the user is about to leave the vehicle, which may cause a vehicle slipping risk. When the vehicle speed is large (larger than a dynamic braking threshold value), if the P-gear switch is detected to be kept in a trigger state, the electronic parking braking system executes a deceleration action, and when the electronic parking braking system executes the deceleration action and detects that the P-gear switch is finished in the trigger state, the electronic parking braking system quits the deceleration action and executes a release action; the reason is that the user continuously presses the P-range switch to indicate that the user has a clear parking intention, the electronic parking brake system performs a deceleration action at the moment, when the vehicle speed is reduced to be not more than the dynamic brake threshold value due to continuous deceleration, the parking action is performed to realize the user intention, and if the user does not press the P-range switch any more in the deceleration process to indicate that the user gives up the parking intention, the electronic parking brake system quits the deceleration action to perform a release action. In the embodiment, whether the P-gear switch is triggered or not, whether the trigger state is continuous or not, whether the vehicle speed is greater than the threshold value or not and other information are used for cooperatively judging the operation which should be executed by the electronic parking brake system, the occurrence of misoperation is avoided to a great extent, and the problem that the misoperation is easily caused when the electronic parking is activated by using the P-gear signal at present is solved.
Drawings
FIG. 1 is a schematic flow chart of a control method for electronic parking according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another electronic park control method according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating another electronic park control apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control system for electronic parking according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Referring to fig. 1, a flowchart of a control method for electronic parking according to an embodiment of the present invention is shown,
an embodiment of the present invention provides a method for controlling electronic parking, including:
when the current state of the electronic parking brake system is detected to be a parking state and the gear information is non-P gear information, the electronic parking brake system executes a releasing action;
when the current state of the electronic parking brake system is detected to be a release state and the vehicle is in a vehicle static state, the gear information is detected to be P gear information, or the user intention information is detected to be parking intention information, and the electronic parking brake system executes parking action.
Compared with the prior art, the electronic parking control method provided by the invention has the advantages that the traditional P gear lock is cancelled, only one actuator is arranged in the parking part, namely, the electronic parking is realized, the manufacturing cost is reduced, and meanwhile, the fact that a user cannot really engage the P gear is caused. In addition, the electronic parking actuator is controlled by the P-gear switch without an electronic parking switch, so that the operation of a user is simplified, the understanding difficulty is reduced, and the electronic parking conforming to the operation habit of the user is realized. Meanwhile, the invention not only judges the action which should be executed by the electronic parking brake system through the gear information, but also judges cooperatively through the vehicle state information, wherein the vehicle state information is a general name of all information representing the vehicle state, and specifically comprises gear information, user intention information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information, but is not limited to the above information. Meanwhile, user intention information is introduced, user operation intention is further judged by detecting the user intention information, and the action of electronic parking is controlled by referring to the introduced user intention information, so that the possibility of misoperation is reduced, the problems that misoperation is easily caused when a P-gear signal is used for activating electronic parking at present and the electronic parking cannot be well controlled are solved, and the electronic parking control method which accords with the operation habit of a user and can avoid the misoperation is provided.
In this embodiment, the gear information is information representing a current gear state, the P-gear information is that a current vehicle gear is a P gear, the non-P-gear information is that the current vehicle gear is in a non-P gear, and specifically includes R gear information, D gear information, and N gear information, and the R gear information, the D gear information, and the N gear information respectively represent that the current vehicle gear is an R gear, a D gear, and an N gear. The user intention information comprises driving intention information and parking intention information, the driving intention information is detection information capable of representing that a user has driving intention, such as information that the user steps on an accelerator, and the parking intention information is detection information capable of representing that the user has parking intention, such as information that the user is detected to shut down, power off or open a vehicle door. In the embodiment, when the electronic parking is in a released state and the vehicle is in a static state, the gear information and the user intention information are detected, and the parking intention of the user is embodied by any one of the two information, so that the parking action is executed, the use habit of the user is met, and the possibility of misoperation is reduced. Specifically, when the electronic parking is in a released state and the vehicle is stationary, the gear information may be in a D gear or an R gear, but the user mistakenly regards that the vehicle is parked because the vehicle is stationary, so that there is a risk of sliding the vehicle when the door is opened, and the user does not perform the gear operation, which causes the electronic parking to not perform the parking action.
As an improvement of the above scheme, the non-P-range information is R-range information or D-range information.
In a preferred embodiment of the present invention, when the detected non-P-range information does not include N-range information, the P-range lock is not set in the present invention, and if the user operates the P-range to change to the N-range, no operation is performed, and only a shift operation is performed, so that the vehicle may slip. In order to reduce the possibility of slope slipping, the electronic parking brake system does not execute the releasing action in the N gear, and only executes the releasing action in the R gear or the D gear, and at the moment, a driver can sense the movement of the vehicle, so that subsequent operation is carried out, and the possibility of misoperation is reduced.
As an improvement of the above solution, when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P-shift information, the electronic parking brake system executes a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, user intention information is detected, and when the gear information is detected to be R gear information or D gear information and the user intention information is detected to be driving intention information, the electronic parking brake system executes releasing action.
In a preferred embodiment of the present invention, the electronic parking brake system does not require that the release operation is performed when the user intention information is detected as the driving intention information, without using the detected R range information or D range information as a condition for the electronic parking brake system to perform the release operation. The driving intention information is detected when the user steps on the accelerator in the embodiment, and in the embodiment, the step-on of the accelerator by the user is used as a condition for the electronic parking brake system to execute a release action, so that misoperation of the user can be further avoided, and the parking safety is ensured. Specifically, although the driver can sense the movement of the vehicle when the release action is performed in the R-range or the D-range, and thus perform subsequent operations, the possibility of incorrect operations is reduced, but the possibility of incorrect operations by the user is not excluded, and vehicle rolling can also occur if the user performs the operations after the release action is performed in the R-range or the D-range. In contrast, in a preferred embodiment of the present invention, the step-on of the accelerator by the user is used as a condition for executing the release action of the electronic parking brake system, and the execution action of the electronic parking brake system is controlled through clear user intention information, so that the possibility of misoperation is avoided, and the parking safety of the user is ensured.
As an improvement of the above solution, when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P-shift information, the electronic parking brake system executes a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information are detected, whether the brake pressure under the current parking ramp is enough or not is judged according to the parking ramp information and the brake pressure information, and when the power supply of the vehicle is detected to be the power-on state, the vehicle brake is the stepping-on state and the brake pressure under the current parking ramp is enough, the electronic parking brake system executes a releasing action.
In a preferred aspect of the present invention, the vehicle power information is information indicating whether a vehicle power is turned on; the vehicle brake information is information representing whether a driver steps on the brake; the parking ramp information is information representing the gradient condition of the road where the current vehicle is located; the brake pressure information is information representing whether the current pressure meets the braking requirement. Whether the electronic parking brake system executes the releasing action is cooperatively judged by detecting various information such as vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information. Specifically, although it is possible to avoid erroneous operation and ensure safety by determining whether or not the electronic parking brake system performs the release operation based on the user intention information, it is necessary for the user to perform an operation that can indicate an intention, which may complicate the user operation and may not conform to the user's operation habit. In contrast, in the present embodiment, a safety and convenience determination method is provided, where when it is detected that a vehicle power supply is in a power-on state, a vehicle brake is in a stepping-on state, and when a brake pressure of a current parking slope is sufficient, an electronic parking brake system executes a release action, where the electronic parking brake system executes the release action and releases the electronic parking brake system and converts the electronic parking brake system into an R gear or a D gear. In practical use, the gear P is in gear D, the vehicle is bound to leave, the gear is in gear power ON, and the judgment is to prevent misjudgment and avoid vehicle slipping. Ramp information is also considered in the embodiment, when the brake pressure under the current parking ramp is enough, the electronic parking brake system executes the release action, and on the premise of ensuring safety, the simplified user operation is realized, and the operation habit of the user is fitted.
As an improvement of the above, the control method further includes:
when detecting the trigger of a P-gear switch, detecting the current state and the vehicle speed of the electronic parking brake system;
when the current state of the electronic parking brake system is a release state and the vehicle speed is not greater than the dynamic brake threshold value, the electronic parking brake system executes a parking action;
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than a dynamic brake threshold value, detecting whether a P-gear switch keeps a trigger state;
when detecting that the P-gear switch does not keep a trigger state, sending a prompt that the dynamic braking condition is not met, and not executing a parking action;
when the P-gear switch is detected to be kept in a trigger state, the electronic parking brake system executes a deceleration action, and when the electronic parking brake system executes the deceleration action and detects that the P-gear switch is in a trigger state, the electronic parking brake system quits the deceleration action and executes a release action.
Referring to fig. 2, in a preferred embodiment of the present invention, the electronic parking brake system is controlled to perform different operations according to the P-stop switch and the vehicle speed while the vehicle is in motion. Whether the electronic parking brake system executes the parking action or not can be judged through gear information or user intention information when the vehicle is in a static state, but in practical use, the electronic parking brake system does not always wait for the vehicle to be in the static state for parking, and direct parking when the vehicle moves is also an operation habit of many users. In this regard, the electronic parking brake system performs different operations according to a P-range switch, which is essentially a user operation request, may be an actual switch, and may be a specific position of a shift lever, and a vehicle speed control. In this embodiment, a dynamic braking threshold is introduced, where the dynamic braking threshold is a speed threshold capable of executing a braking operation, a speed not greater than the threshold is a low speed, a possibility that a user has a parking intention is high, the user operation may be directly executed, and the user intention needs to be further determined at a speed greater than the threshold, so as to avoid that an operation that is not expected by the user is executed by electronic parking, and that an erroneous execution occurs. Specifically, when the vehicle is in a moving state, whether a user has an operation request is judged through a P-gear switch, when the vehicle speed is small (not greater than a dynamic braking threshold value), the current user request is judged to be an effective user request, the user has a parking intention, and the electronic parking braking system executes a parking action; this is because, when the vehicle speed is low, it is possible to estimate that there is currently an intention to park, and at this time, there is a low possibility that the user has made an operation request as an erroneous operation, and therefore, the parking operation is executed considering that the operation is valid at this time. When the vehicle speed is large (larger than a dynamic braking threshold value), further judging the operation intention of a user by detecting whether the P-gear switch keeps a trigger state, and if the P-gear switch does not keep the trigger state, sending a prompt that the dynamic braking condition is not met and not executing a parking action; this is because, when the vehicle speed is high, the operation request sent by the user may be a wrong operation, for example, the P-stop switch is pressed carelessly during driving, and in order to determine whether the operation is a wrong operation, a further determination is needed, that is, whether the P-stop switch is kept in a trigger state is detected, if the user is a wrong operation, the P-stop switch is pressed carelessly, the operation should be stopped soon, so that when it is detected that the P-stop switch is not kept in the trigger state, the wrong operation is determined, the parking operation is not performed, and the driving is not affected; however, it is also possible that the user really needs to park, and after the P-range switch is pressed, the user mistakenly regards that the parking is executed, and the user is about to leave the vehicle, which may cause a vehicle slipping risk. When the vehicle speed is large (larger than a dynamic braking threshold value), if the P-gear switch is detected to be kept in a trigger state, the electronic parking braking system executes a deceleration action, and when the electronic parking braking system executes the deceleration action and detects that the P-gear switch is detected to finish the trigger state, the electronic parking braking system quits the deceleration action and executes a release action; the reason is that the user continuously presses the P-range switch to indicate that the user has a clear parking intention, the electronic parking brake system performs a deceleration action at the moment, when the vehicle speed is reduced to be not more than the dynamic brake threshold value due to continuous deceleration, the parking action is performed to realize the user intention, and if the user does not press the P-range switch any more in the deceleration process to indicate that the user gives up the parking intention, the electronic parking brake system quits the deceleration action to perform a release action. In the embodiment, whether the P-gear switch is triggered or not, whether the trigger state is continuous or not, whether the vehicle speed is greater than the threshold value or not and other information are used for cooperatively judging the operation which should be executed by the electronic parking brake system, the occurrence of misoperation is avoided to a great extent, and the problem that the misoperation is easily caused when the electronic parking is activated by using the P-gear signal at present is solved.
As an improvement of the above solution, when the current state of the electronic parking brake system is a released state and the vehicle speed is greater than a dynamic braking threshold, detecting whether the P-range switch remains in a triggered state includes:
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than the dynamic brake threshold, judging whether the vehicle speed is not greater than an automatic deceleration threshold;
when the vehicle speed is detected to be not greater than the automatic deceleration threshold value, the electronic parking brake system executes deceleration action;
and when the vehicle speed is detected to be greater than the automatic deceleration threshold value, detecting whether the P-gear switch keeps a trigger state.
Referring to fig. 3, in a preferred embodiment of the present invention, when the P-range switch is triggered and the vehicle speed is greater than the dynamic braking threshold, it is determined whether the vehicle speed is not greater than the automatic deceleration threshold. When the vehicle speed is greater than a dynamic braking threshold value, the operation intention of a user is judged through the state of a P-gear switch, the user is judged to have a definite parking intention only when the user keeps the P-gear switch triggered, the electronic parking braking system executes a deceleration action, the user can express the operation intention only by triggering the P-gear switch for a long time, the electronic parking braking system does not execute the parking action or recover to a release action possibly because the P-gear switch is not triggered for a long time, and the user who is used to realize parking by pressing the P-gear switch has the problems that the use habit is not met and misoperation is easy to occur. In this regard, in the present embodiment, an automatic deceleration threshold is introduced, which is a speed threshold at which automatic deceleration can be performed, a speed not greater than the threshold is a lower speed at which a user may have an intention to park, and a speed interval between a dynamic braking threshold and the automatic deceleration threshold is a lower speed at which a user may press a P-stop switch, and the interval has a better comfort in performing parking, and even if electronic parking is performed by mistake, an impact on the user is smaller, for which automatic deceleration and dynamic braking operation can be performed in the speed interval, and in the case where deceleration is lower, comfort in use by the user can be increased, an impact due to misoperation can be reduced, and in the case where the speed is greater than the threshold, the user intention needs to be further determined, the electronic parking is prevented from executing operation which is not expected by a user, and error execution is avoided. Specifically, upon detecting that the P-stop switch is triggered and the vehicle speed is greater than the dynamic braking threshold, it is further determined whether the vehicle speed is not greater than the auto-deceleration threshold. If the vehicle speed is not greater than the automatic deceleration threshold value, the electronic parking braking system executes deceleration action, the vehicle speed is not very high at the moment, the electronic parking braking system decelerates automatically, and the electronic parking braking system does not need to press a P-gear switch for a long time to enter the deceleration action; when the vehicle speed is greater than the automatic deceleration threshold value, whether the P-gear switch keeps a trigger state is further detected, and the intention of a user is judged through the continuous state of the P-gear switch. In this embodiment, the user's usage habits are taken into account by further comparing whether the vehicle speed is not greater than the automatic deceleration threshold, and the impact caused by the misoperation is further reduced.
Another embodiment of the present invention correspondingly provides a control device for electronic parking, including:
the driving detection module is used for executing release action by the electronic parking brake system when detecting that the current state of the electronic parking brake system is a parking state and the gear information is non-P gear information;
and the parking detection module is used for detecting that the gear information is P gear information or detecting that the user intention information is parking intention information when detecting that the current state of the electronic parking brake system is a release state and the vehicle is in a vehicle static state, and executing parking action by the electronic parking brake system.
In the embodiment of the invention, the traditional P gear lock is cancelled, only one actuator is arranged on the parking part, namely, the electronic parking is carried out, the manufacturing cost is reduced, and meanwhile, the fact that a user cannot really engage the P gear is caused. In addition, the electronic parking actuator is controlled by the P-gear switch without an electronic parking switch, so that the operation of a user is simplified, the understanding difficulty is reduced, and the electronic parking conforming to the operation habit of the user is realized. Meanwhile, the invention not only judges the action which should be executed by the electronic parking brake system through the gear information, but also judges cooperatively through the vehicle state information, wherein the vehicle state information is a general name of all information representing the vehicle state, and specifically comprises gear information, user intention information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information, but is not limited to the above information. Meanwhile, user intention information is introduced, user operation intention is further judged by detecting the user intention information, and the action of electronic parking is controlled by referring to the introduced user intention information, so that the possibility of misoperation is reduced, the problems that misoperation is easily caused when a P-gear signal is used for activating electronic parking at present and the electronic parking cannot be well controlled are solved, and the electronic parking control method which accords with the operation habit of a user and can avoid the misoperation is provided.
In this embodiment, not only the motion that the electronic parking brake system should perform is determined through the gear information, but also the vehicle state information is determined cooperatively, where the vehicle state information is a generic term of all information representing the vehicle state, and specifically includes gear information, user intention information, vehicle power information, vehicle brake information, parking ramp information, and brake pressure information, but is not limited to the above information. The gear information is information representing the current gear state, the P gear information is that the current vehicle gear is the P gear, the non-P gear information is that the current vehicle gear is in the non-P gear, and the non-P gear information specifically comprises R gear information, D gear information and N gear information, wherein the R gear information, the D gear information and the N gear information respectively represent that the current vehicle gear is the R gear, the D gear and the N gear. The user intention information comprises driving intention information and parking intention information, the driving intention information is detection information capable of representing that a user has driving intention, such as information that the user steps on an accelerator, and the parking intention information is detection information capable of representing that the user has parking intention, such as information that the user is detected to shut down, power off or open a vehicle door. In the embodiment, when the electronic parking is in a released state and the vehicle is in a static state, the gear information and the user intention information are detected, and the parking intention of the user is embodied by any one of the two information, so that the parking action is executed, the use habit of the user is met, and the possibility of misoperation is reduced. Specifically, when the electronic parking is in a released state and the vehicle is stationary, the gear information may be in a D gear or an R gear, but the user mistakenly regards that the vehicle is parked because the vehicle is stationary, so that there is a risk of sliding the vehicle when the door is opened, and the user does not perform the gear operation, which causes the electronic parking to not perform the parking action.
Another embodiment of the present invention provides a controller for electronic parking, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the control method for electronic parking according to the above-mentioned embodiment of the present invention when executing the computer program.
Referring to fig. 4, another electronic parking control system of the present invention includes: the system comprises a controller 1, an electronic parking brake system 2, a P-gear switch 3 and a vehicle state detection system 4; the vehicle state detection system 4 is connected with the controller 1 and is used for sending detected vehicle state information to the controller 1; the P-gear switch 3 is connected with the controller 1 and used for sending the detected P-gear switch state information to the controller 1; the electronic parking brake system 2 is connected with the controller 1 and is used for executing an action command sent by the controller 1; the controller 1 includes a processor 100, a memory 101, and a computer program stored in the memory 101 and configured to be executed by the processor 100, and when the processor executes the computer program, the controller implements the control method of electronic parking according to the embodiment of the present invention. Alternatively, the processor 100 implements the functions of the modules/units in the above device embodiments when executing the computer program. In the present embodiment, the vehicle state information is a general term of all information characterizing the vehicle state, and specifically includes gear position information, user intention information, vehicle power supply information, vehicle brake information, parking ramp information, and brake pressure information, but is not limited to the above information.
Specifically, the electronic parking brake system 2 comprises an electronic parking controller 21 and an electronic parking brake device 22; the electronic parking brake device 22 is connected with the electronic parking controller 21; the electronic parking controller 21 controls the electronic parking brake device 22 to perform a vehicle braking action.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the control device for electronic parking.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be used to store the computer program and/or the module, and the processor may implement various functions of the control device for electronic parking by operating or executing the computer program and/or the module stored in the memory and calling up data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein, the integrated module/unit of the electronic parking control device can be stored in a computer readable storage medium if it is realized in the form of software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. A control method of electronic parking, characterized by comprising:
when the current state of the electronic parking brake system is detected to be a parking state and the gear information is non-P gear information, the electronic parking brake system executes a releasing action;
when the current state of the electronic parking brake system is detected to be a release state and the vehicle is in a vehicle static state, detecting that gear information is P gear information or detecting that user intention information is parking intention information, and executing parking action by the electronic parking brake system;
the method further comprises the following steps:
when detecting the trigger of a P-gear switch, detecting the current state and the vehicle speed of the electronic parking brake system;
when the current state of the electronic parking brake system is a release state and the vehicle speed is not greater than the dynamic brake threshold value, the electronic parking brake system executes a parking action;
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than a dynamic brake threshold value, detecting whether a P-gear switch keeps a trigger state; when detecting that the P-gear switch does not keep a trigger state, sending a prompt that the dynamic braking condition is not met, and not executing a parking action; when the P-gear switch is detected to be kept in a trigger state, the electronic parking brake system executes a deceleration action, and when the electronic parking brake system executes the deceleration action and detects that the P-gear switch is detected to finish the trigger state, the electronic parking brake system quits the deceleration action and executes a release action.
2. The method according to claim 1, wherein the non-P range information is R range information or D range information.
3. The method for controlling electronic parking according to claim 2, wherein when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P shift information, the electronic parking brake system performs a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, user intention information is detected, and when the gear information is detected to be R gear information or D gear information and the user intention information is detected to be driving intention information, the electronic parking brake system executes releasing action.
4. The method for controlling electronic parking according to claim 2, wherein when it is detected that the current state of the electronic parking brake system is the parking state and the shift information is the non-P shift information, the electronic parking brake system performs a release action, including:
when the current state of the electronic parking brake system is detected to be the parking state and the gear information is non-P gear information, vehicle power supply information, vehicle brake information, parking ramp information and brake pressure information are detected, whether the brake pressure under the current parking ramp is enough or not is judged according to the parking ramp information and the brake pressure information, and when the power supply of the vehicle is detected to be the power-on state, the vehicle brake is the stepping-on state and the brake pressure under the current parking ramp is enough, the electronic parking brake system executes a releasing action.
5. The method for controlling electronic parking according to claim 1, wherein when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than a dynamic brake threshold value, detecting whether the P-range switch keeps a trigger state comprises:
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than the dynamic brake threshold, judging whether the vehicle speed is not greater than an automatic deceleration threshold;
when the vehicle speed is detected to be not greater than the automatic deceleration threshold value, the electronic parking brake system executes deceleration action;
and when the vehicle speed is detected to be greater than the automatic deceleration threshold value, detecting whether the P-gear switch keeps a trigger state.
6. A control device for electronic parking, characterized by comprising:
the driving detection module is used for executing release action by the electronic parking brake system when detecting that the current state of the electronic parking brake system is a parking state and the gear information is non-P gear information;
the parking detection module is used for detecting that the gear information is P gear information or detecting that the user intention information is parking intention information when detecting that the current state of the electronic parking brake system is a release state and the vehicle is in a vehicle static state, and executing parking action by the electronic parking brake system;
the switch trigger detection module is used for detecting the current state and the vehicle speed of the electronic parking brake system when detecting the trigger of the P-gear switch;
when the current state of the electronic parking brake system is a release state and the vehicle speed is not greater than the dynamic brake threshold value, the electronic parking brake system executes a parking action;
when the current state of the electronic parking brake system is a release state and the vehicle speed is greater than a dynamic brake threshold value, detecting whether a P-gear switch keeps a trigger state; when detecting that the P-gear switch does not keep a trigger state, sending a prompt that the dynamic braking condition is not met, and not executing a parking action; when the P-gear switch is detected to be kept in a trigger state, the electronic parking brake system executes a deceleration action, and when the electronic parking brake system executes the deceleration action and detects that the P-gear switch is detected to finish the trigger state, the electronic parking brake system quits the deceleration action and executes a release action.
7. A controller for electronic parking, characterized by comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the control method for electronic parking according to any one of claims 1 to 5 when executing the computer program.
8. A control system for electronic parking, comprising: the system comprises a controller, an electronic parking brake system, a P-gear switch and a vehicle state detection system; wherein the content of the first and second substances,
the vehicle state detection system is connected with the controller and is used for sending the detected vehicle state information to the controller;
the P-gear switch is connected with the controller and is used for sending the detected state information of the P-gear switch to the controller;
the electronic parking brake system is connected with the controller and is used for executing the action command sent by the controller;
the controller comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the control method of electronic parking according to any one of claims 1 to 5 when executing the computer program.
9. A vehicle characterized by comprising the control system for electronic parking according to claim 8.
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| CN112963522B (en) * | 2021-02-02 | 2022-04-29 | 东风汽车集团股份有限公司 | Electronic shifter access P-gear protection control method, system and storage medium |
| CN112937544A (en) * | 2021-04-06 | 2021-06-11 | 行程远赢(无锡)汽车科技有限公司 | Electronic parking braking method |
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