CN111089167A - Control method, device, controller and system for vehicle P-gear parking and vehicle - Google Patents

Control method, device, controller and system for vehicle P-gear parking and vehicle Download PDF

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Publication number
CN111089167A
CN111089167A CN201811235397.7A CN201811235397A CN111089167A CN 111089167 A CN111089167 A CN 111089167A CN 201811235397 A CN201811235397 A CN 201811235397A CN 111089167 A CN111089167 A CN 111089167A
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China
Prior art keywords
vehicle
gear
parking
detected
state
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CN201811235397.7A
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Chinese (zh)
Inventor
黄亮
陈友辉
江泽文
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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Priority to CN201811235397.7A priority Critical patent/CN111089167A/en
Publication of CN111089167A publication Critical patent/CN111089167A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/34—Locking or disabling mechanisms
    • F16H63/3416—Parking lock mechanisms or brakes in the transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/60—Inputs being a function of ambient conditions
    • F16H59/66—Road conditions, e.g. slope, slippery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/60—Inputs being a function of ambient conditions
    • F16H59/66—Road conditions, e.g. slope, slippery
    • F16H2059/663—Road slope

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention discloses a control method, a device, a controller, a system and a vehicle for vehicle P-gear parking, wherein the control method for the vehicle P-gear parking comprises the following steps: after a P gear locking instruction is received, detecting whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value; when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be larger than a preset gradient threshold value, whether an electronic parking brake system of the vehicle is in a parking state is detected; when the electronic parking brake system is detected to be in a parking state, detecting whether a brake is in a stepping-on state; and when the brake is detected not to be in a treading state, controlling the vehicle to execute P gear lock stopping according to the P gear lock-up instruction. The invention can avoid the P gear lock from being locked because the vehicle is parked on the slope in the P gear.

Description

Control method, device, controller and system for vehicle P-gear parking and vehicle
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method, a control device, a control controller, a control system and a vehicle for P-gear parking of the vehicle.
Background
The P gear is the most common gear in an automatic transmission type, 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 of a front wheel of a vehicle through the gear when the vehicle is at a standstill on a slope is achieved. The 'P' in the gear P is derived from the first letter in the English vocabulary park, so that in the gear of the automatic transmission automobile, the gear P is the identifier of the parking gear, and the gear P is the gear evolved on the basis of the gear N. When the driver operates the vehicle into the P range, the vehicle's gearbox is placed in neutral mode and the vehicle's P lock is locked. Specifically, the structure of the P-gear lock is a pawl arranged in the gearbox, and the pawl is used for buckling a gear on an output shaft of the gearbox to form mechanical locking, so that an axle of a front wheel of a vehicle connected with the output shaft is clamped, the front wheel of the vehicle cannot rotate, and the effect of fixing the vehicle in a static state or jogging the vehicle is achieved. Wherein, the process that the driver operates the P gear is as follows: when the vehicle is on a slope and needs to be kept static, a driver firstly steps on the brake, a brake system of the vehicle can brake the front wheel and the rear wheel or only brake the front wheel, so that the vehicle basically stops, then the P-gear switch is pressed, the vehicle can control the P-gear lock to be locked, the front wheel of the vehicle cannot rotate, so that the vehicle stops, and the driver can release the brake at the moment.
The inventor finds that the following technical problems exist in the prior art in the process of implementing the invention: when a vehicle is parked on a slope through P gear, after a driver releases the brake, the P gear lock can independently bear all the downhill force of the vehicle on the slope, so that the locking mechanism of the P gear lock is difficult to pull out and block after the locking mechanism buckles an output shaft of a gearbox.
Disclosure of Invention
The embodiment of the invention provides a control method, a device, a controller, a system and a vehicle for parking a vehicle in a P gear, which can effectively solve the technical problem that a P gear lock is blocked when the vehicle on a ramp parks in the P gear in the prior art.
An embodiment of the invention provides a control method for P-gear parking of a vehicle, which comprises the following steps:
after a P gear locking instruction is received, detecting whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value;
when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be larger than a preset gradient threshold value, whether an electronic parking brake system of the vehicle is in a parking state is detected;
when the electronic parking brake system is detected to be in a parking state, detecting whether a brake is in a stepping-on state;
and when the brake is detected not to be in a treading state, controlling the vehicle to execute P gear lock stopping according to the P gear lock-up instruction.
As an improvement of the above, the control method further includes:
and when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be smaller than a preset gradient threshold value, controlling the vehicle to execute P gear lock stopping operation according to the P gear lock-up instruction.
As an improvement of the above, the control method further includes:
and when the electronic parking brake system is detected not to be in a parking state, controlling the vehicle to send an electronic parking request prompt to a driver.
As an improvement of the above, the control method further includes:
when the brake is detected to be in the treading state, the display device of the vehicle is controlled to display the locking information of the P gear until the brake is detected not to be in the treading state.
As an improvement of the above solution, the step of controlling the vehicle to execute the P-range lock stop operation according to the P-range lock instruction when the brake is detected not to be in the pressed state includes:
when the brake is detected not to be in a stepping-on state, detecting whether the automatic parking system is in a hydraulic braking state or not;
when the automatic parking system is detected to be in the hydraulic braking state, controlling a display device of the vehicle to display information that the P gear is being locked until the automatic parking system is detected not to be in the hydraulic braking state;
and when the automatic parking system is not in a hydraulic braking state, controlling the vehicle to execute P gear locking action according to the P gear locking instruction.
As an improvement of the above, the control method further includes:
detecting the working state of the electronic parking brake system after receiving a P gear lock unlocking instruction;
when the electronic parking brake system is detected to start to enter a release state or the electronic parking brake system is detected to be in a parking state, detecting whether the gradient of a road surface where a vehicle is located at present is larger than a preset gradient threshold value;
when the gradient is detected to be larger than a preset gradient threshold value, detecting whether a brake is in a treading state;
and when the brake is detected to be in a treading state, controlling the vehicle to execute a P-gear unlocking action according to the P-gear unlocking instruction.
Another embodiment of the present invention correspondingly provides a control device for a P-range parking of a vehicle, including:
the first detection module is used for detecting whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value or not after a P gear locking instruction is received;
the second detection module is used for detecting whether an electronic parking brake system of the vehicle is in a parking state or not when the current speed is detected to be smaller than a preset speed threshold and the gradient is detected to be larger than a preset gradient threshold;
the third detection module is used for detecting whether the brake is in a stepping-on state or not when the electronic parking brake system is detected to be in the parking state;
and the first execution module is used for controlling the vehicle to execute the P-gear locking stopping action according to the P-gear locking instruction when the brake is detected not to be in a treading state.
Another embodiment of the present invention provides a controller for parking a vehicle in a P-range, which includes 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 method for controlling the parking of the vehicle in the P-range according to the embodiment of the present invention when executing the computer program.
Another embodiment of the present invention provides a control system for parking a vehicle in a P-range, including: the parking brake system comprises a controller, an electronic parking brake system, a P-gear switch, a P-gear lock device and a brake system; wherein,
the electronic parking brake system is connected with the controller and is used for sending the detected parking state information to the controller;
the P gear switch is connected with the controller and is used for sending a P gear locking instruction to the controller when the P gear switch is closed or opened;
the P gear locking device is connected with the controller and is used for executing a P gear locking action and a P gear unlocking action under the control of the controller;
the brake system is connected with the controller and is used for sending the detected brake state information to 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 for the P-gear parking of the vehicle according to the embodiment of the invention.
Another embodiment of the invention provides a vehicle, which comprises the control system for parking in the P gear of the vehicle according to the embodiment of the invention.
Compared with the prior art, the control method, the control device, the control system and the vehicle for parking in the P gear of the vehicle provided by the embodiment of the invention have the advantages that after the P gear locking instruction is received, whether the current speed of the vehicle is smaller than a preset speed threshold value or not and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value or not are detected; when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be larger than a preset gradient threshold value, whether an electronic parking brake system of the vehicle is in a parking state is detected; when the electronic parking brake system is detected to be in a parking state, detecting whether a brake is in a stepping-on state; and when the brake is detected not to be in a treading state, controlling the vehicle to execute P gear lock stopping according to the P gear lock-up instruction. From the above analysis, in the embodiment of the invention, when the driver steps on the brake to basically stop the vehicle on the slope and presses the P-gear lock switch, firstly, whether the vehicle is stopped on a slope and whether the P gear lock of the vehicle is locked by the slope where the vehicle is located are detected by detecting the speed of the vehicle and the gradient of the road surface where the vehicle is located, then, the parking state of the electronic parking brake system is detected to ensure that the electronic parking brake system locks the rear wheel of the vehicle before the P-gear lock locks the front wheel of the vehicle, then the brake state of the vehicle is detected to ensure that the downhill force of the vehicle is completely born by the electronic parking brake system, and finally the P-gear lock is locked, therefore, the P-gear lock is ensured not to bear excessive downhill force of the vehicle on a slope after being locked, and the P-gear lock is prevented from being locked due to P-gear parking of the vehicle on the slope.
Drawings
FIG. 1 is a flowchart illustrating a control method for parking a vehicle in P gear according to an embodiment of the invention;
FIG. 2 is a flowchart illustrating another control method for parking a vehicle in P gear according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a control device for P-gear parking of a vehicle according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of another control device for P-gear parking of a vehicle according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control system for parking a vehicle in P gear 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 method for controlling a vehicle to park in a P-gear according to an embodiment of the present invention is shown, where the method for controlling a vehicle to park in a P-gear is executed by a vehicle during a process in which a driver operates the vehicle to park in a P-gear on a slope, and the method for controlling the vehicle to park in a P-gear may be implemented by software and/or hardware, and the vehicle may be a fuel-powered vehicle, an electric vehicle, a hybrid electric vehicle, or the like.
When a driver operates a vehicle to perform P-gear parking on a slope, in order to avoid the P-gear lock from being stuck due to the downhill force of the vehicle alone, the driver should operate according to the following operation method provided by the embodiment of the invention:
(1) when a vehicle needs to park in a P gear on a slope, firstly, a driver steps on a brake, a front wheel and a rear wheel of the vehicle are simultaneously braked by a brake system (of course, the brake system can also only brake the front wheel), so that the vehicle basically stops, and after the vehicle stops braking, the driver keeps the brake in a stepping-on state; (2) then, a driver pulls up an electronic Parking Brake switch of an electronic Parking Brake system (EPB) so that the electronic Parking Brake system brakes a rear wheel of the vehicle, and the Brake system brakes a front wheel and a rear wheel of the vehicle at the moment, so that the Brake system can bear most of the downhill force of the vehicle, and the electronic Parking Brake system can bear part of the downhill force of the vehicle; (3) then the driver releases the brake, so that the front wheel of the vehicle is no longer braked by the brake system, the electronic parking brake system enables the vehicle to continue to stop by braking the rear wheel, at the moment, the downhill force of the whole vehicle is borne by the electronic parking brake system, and the front wheel part of the vehicle is no longer borne by the downhill force of the vehicle, so that the front wheel of the vehicle keeps static and no longer has the tendency of rolling down the slope, and thus the axle of the front wheel of the vehicle and the output shaft of the gearbox connected with the front wheel axle are both kept static and no longer have the tendency of rotating; (4) after the driver releases the brake, the driver operates the vehicle to enter the P gear (the operation mode can be that the driver presses a P gear switch or pushes a push rod to enter the P gear, and the like), at the moment, because the output shaft of the gearbox does not have the tendency of rotating any more, when the vehicle enters the P gear, the P gear lock of the vehicle is locked on the output shaft, and the P gear lock cannot be locked with the output shaft. In a simplified manner, the general process of the above-mentioned operating method for operating the vehicle to park in P gear on a slope by the driver is as follows: the electronic parking brake switch is pulled up according to the brake release from the brake release after the vehicle is stopped from the brake depression and deceleration switch, and the P-gear switch is pressed.
The operating method for the driver to operate the vehicle to park in the P gear on the slope has the following substantial principle of avoiding the P gear lock from being stuck due to the fact that the P gear lock alone bears the downhill force of the vehicle: when the P gear parking is carried out, an electronic parking braking system of the vehicle is utilized to assist the parking of the vehicle, and the brake is released after the electronic parking braking system executes the parking, so that the electronic parking braking system bears the downhill force of the whole vehicle, the downhill force of the vehicle can not be borne after the P gear is locked, and the P gear lock is prevented from being locked when the P gear parking is carried out on a ramp.
It should be noted that the electronic parking brake system is not necessarily used to assist the parking of the vehicle, so that the P-range lock can be prevented from being locked when the vehicle is parked in the P-range on a slope. For example, when the driver operates the vehicle to park in P gear on a slope, the following two modes are used:
(1) the P-stop lock bears the full downhill force of the vehicle: the electronic parking brake switch is pulled up by pressing a P-gear switch (brake release) from brake release after the vehicle is stopped from running brake deceleration.
Specifically, after the vehicle is braked and stopped on a slope, the P-gear switch is pressed down first, so that after a driver releases the brake, all downhill force of the vehicle is transferred to the front wheel part and is completely borne by the P-gear lock, and at the moment, the rear wheel does not have a rolling trend any more, so that even if the electronic parking brake switch is pulled up to brake the rear wheel by the electronic parking brake system, the electronic parking brake system does not share the downhill force of the vehicle.
(2) The P-stop lock bears half of the downhill force of the vehicle: vehicle running, brake reduction, brake loosening after parking, pulling an electronic parking brake switch, and pressing a P-gear switch to release the brake.
Specifically, after the vehicle is braked and stopped on a slope, the electronic parking brake system brakes a rear wheel by pulling the electronic parking brake switch first, and then the P-gear switch is pressed to brake a front wheel by the P-gear lock.
In order to ensure that the vehicle is not parked in the P gear after a driver performs a correct P gear parking operation when the vehicle is parked in the P gear on a slope, the embodiment of the invention provides the control method for parking in the P gear of the vehicle. Specifically, as shown in fig. 1, the control method for the P-range parking of the vehicle includes steps S10 to S13:
s10, after the P gear locking instruction is received, whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of the road surface where the vehicle is located is larger than a preset gradient threshold value or not is detected.
Specifically, when the vehicle is traveling on a slope (which may be an uphill slope or a downhill slope), if the driver needs to park the vehicle on the slope through the P gear, the driver will first step on the brake, so that the vehicle is substantially stopped.
When the vehicle is basically stopped, a driver can enable the vehicle to start to enter a P gear by pressing a P gear lock switch or pushing a push rod to the P gear, at the moment, the P gear lock switch can send a P gear locking instruction to a related controller of the vehicle, and after the controller receives the P gear locking instruction, the controller detects whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located is larger than a preset gradient threshold value so as to detect whether the vehicle is stably stopped on a slope and whether the slope where the vehicle is located can enable the P gear lock of the vehicle to be blocked when the P gear of the vehicle is parked at the P gear of the vehicle.
And S11, when the current speed is detected to be less than a preset speed threshold value and the gradient is detected to be greater than a preset gradient threshold value, detecting whether the electronic parking brake system of the vehicle is in a parking state.
In this embodiment, after the vehicle is braked and stopped and before the P-range lock is locked, the electronic parking brake system needs to be in a parking state in advance. Therefore, when the current speed is detected to be less than the preset speed threshold value and the gradient is detected to be greater than the preset gradient threshold value (indicating that the vehicle is already stopped on the slope and the slope where the vehicle is located can cause the P-gear lock of the vehicle to be locked when the P-gear of the vehicle is parked), whether the electronic parking brake system of the vehicle is in a parking state or not is detected.
And S12, detecting whether the brake is in a treading state or not when the electronic parking brake system is detected to be in the parking state.
When the electronic parking brake system is detected to be in the parking state, the electronic parking brake system is indicated to brake the rear wheel of the vehicle, and meanwhile, the driver can release the brake, and whether the brake is in the stepping-on state or not is detected.
And S13, when the brake is detected not to be in a treading state, controlling the vehicle to execute the P gear lock stopping action according to the P gear lock-up instruction.
When the brake is detected not to be in a stepping-on state, the electronic parking brake system is indicated to bear all downhill force of the vehicle on a slope, and at the moment, the vehicle can be controlled to execute P-gear lock stopping action according to the P-gear lock-up instruction, so that the P-gear lock is locked, and the P-gear parking operation of the vehicle is completed.
In the embodiment of the invention, when a driver steps on a brake to basically stop a vehicle on a slope and presses a P-gear lock switch, whether the vehicle is stably stopped on the slope and whether the slope where the vehicle is located can cause the P-gear lock of the vehicle to be locked is detected by detecting the speed of the vehicle and the gradient of the road surface where the vehicle is located, then the electronic parking brake system is detected to ensure that the electronic parking brake system locks the rear wheel of the vehicle before the P-gear lock locks the front wheel of the vehicle, then the electronic parking brake system is detected to ensure that the downhill force of the vehicle is completely borne by the electronic parking brake system, and finally the P-gear lock is started, so that the P-gear lock is ensured not to bear excessive downhill force of the vehicle on the slope after being locked, and the P-gear lock is prevented from being locked due to P-gear parking of the vehicle on the slope.
In the embodiment of the present invention, optionally, the control method further includes step S11':
and S11', when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be smaller than a preset gradient threshold value, controlling the vehicle to execute P gear lock stopping action according to the P gear lock-up instruction.
Specifically, after step S10, when it is detected that the current speed is less than the preset speed threshold and the gradient is less than the preset gradient threshold, it indicates that the vehicle has stopped on the road and that the gradient of the road (e.g., a flat road) on which the vehicle is located is not sufficient for the P-lock of the vehicle to be locked when the vehicle is in the P-gear parking state, so that the vehicle may be controlled to perform the P-lock locking action directly according to the P-lock instruction.
In the embodiment of the present invention, preferably, the control method further includes step S12':
and S12', when the electronic parking brake system is not in the parking state, controlling the vehicle to send an electronic parking request prompt to a driver.
Specifically, after step S11, when it is detected that the electronic parking brake system is not in the parking state, it indicates that the electronic parking brake system has not braked the rear wheel of the vehicle, and at this time, even if the driver operates the vehicle to enter the P range and sends the P range lock instruction to the controller, after receiving the P range lock instruction, the controller does not control the vehicle to perform the P range lock stop operation according to the P range lock instruction, but controls the vehicle to send an electronic parking request prompt to the driver, so that the driver pulls up the electronic parking brake switch to enable the electronic parking brake system to enter the parking state, thereby avoiding the P range lock from being locked due to the absence of the electronic parking brake system for assisting parking when the vehicle performs the P range parking on a slope.
In the embodiment of the present invention, preferably, the control method further includes step S13':
and S13', when the brake is detected to be in the treading state, controlling the display device of the vehicle to display the locking information of the P gear until the brake is detected not to be in the treading state.
In detail, after step S12, when it is detected that the brake is in the pressed state, it indicates that the P range lock cannot be locked, so as to facilitate the driver to know the current P range parking state of the vehicle, so as to allow the driver to better perform the P range parking, and at this time, a display device (such as a display screen or an indicator lamp) of the vehicle is controlled to display the P range locking information until it is detected that the brake is not in the pressed state, so that the driver can release the brake after seeing the P range locking information. The P-range locking information may be a "P-range" displayed on a display screen, or may be light emitted from an indicator light, and is not particularly limited herein.
Because many current vehicles have an automatic parking function (Auto Hold), when the vehicles are temporarily parked (such as a traffic light for stopping temporarily on an ascending and descending slope or stopping and the like) and need to be restarted after a short period of time, the vehicle can start the function, so that the automatic parking system automatically adopts a four-wheel hydraulic braking mode to automatically brake the vehicles, the hand brake or the electronic parking brake is not required to be pulled, the operation is simplified by avoiding using the hand brake or the electronic parking brake system, and the automatic stop type is not required to be switched from D to N, D to P. When a vehicle is parked on a slope in a P gear mode, the automatic parking system of the vehicle is always in a working state, specifically, after an electronic parking brake switch is pulled up and the brake is released, and before the P gear lock is locked, the automatic parking system is in a hydraulic braking state. In order to avoid such a situation, in the embodiment of the present invention, the following improvements are provided: specifically, the step S12 includes steps S120 to S122:
and S120, detecting whether the automatic parking system is in a hydraulic braking state or not when the brake is detected not to be in a stepping-on state.
And S121, when the automatic parking system is detected to be in the hydraulic braking state, controlling a display device of the vehicle to display the locking information of the P gear until the automatic parking system is detected not to be in the hydraulic braking state.
When the automatic parking system is detected to be in the hydraulic braking state, the P gear lock cannot be locked at the moment, so that a driver can know the current P gear parking state of the vehicle conveniently, the driver can better park in the P gear, and the display device (such as a display screen or an indicator lamp) of the vehicle is controlled to display the locking information of the P gear until the automatic parking system is detected not to be in the hydraulic braking state, so that the driver can quit the automatic parking function after seeing the locking information of the P gear. The P-range locking information may be a "P-range" displayed on a display screen, or may be light emitted from an indicator light, and is not particularly limited herein.
And S122, when the automatic parking system is not in the hydraulic braking state, controlling the vehicle to execute the P gear lock stopping action according to the P gear lock-up instruction.
In the improved embodiment, the P-gear lock is locked by detecting the hydraulic braking state of the automatic parking system of the vehicle and locking the P-gear lock when the automatic parking system is not detected to be in the hydraulic braking state, so that the P-gear lock is locked.
The control method for the P-gear parking of the vehicle and the operation method for the driver to operate the vehicle to perform the P-gear parking are mainly used for the case that the vehicle performs the P-gear parking on a slope. When the vehicle exits from the P-gear parking state on a slope, if the driver does not operate properly, the P-gear lock is possibly locked, so that the vehicle cannot exit from the P gear.
In order to avoid the situation, the embodiment of the invention further provides an operation method for the driver to operate the vehicle to exit from the P-gear parking, which comprises the following steps: when the vehicle needs to exit from the P-gear parking state on a slope and before the P-gear lock is unlocked, the driver firstly presses the brake and keeps the brake in the pressed state, then the driver operates the vehicle to enable the electronic parking brake system to start exiting from the parking state, and in the process that the electronic parking brake system exits from the parking state (including the two situations of exiting or exiting after finishing), or after the driver presses the brake and before the electronic parking brake system exits from the parking state, the driver can operate the vehicle to unlock the P-gear lock. The P-gear lock is unlocked before the electronic parking brake system exits parking, so that the P-gear lock cannot bear the downhill force of a vehicle (borne by the electronic parking brake system and the brake system) when unlocked, and the unlocking can be smoothly carried out; or the P-gear lock is unlocked in the process that the electronic parking brake system is released from parking, and the vehicle is braked by the brake system, so that the P-gear lock can not bear the downhill force of the vehicle (borne by the brake system alone or borne by the electronic parking brake system and the brake system together) when being unlocked, and the unlocking can be smoothly carried out.
In order to ensure that the vehicle is unlocked in the P range after the driver performs the correct P range exit parking operation, so as to avoid the P range lock from being locked when the vehicle exits the P range parking, referring to fig. 2, the control method according to the embodiment of the present invention further includes steps S14 to S17:
and S14, detecting the working state of the electronic parking brake system after receiving the P gear lock unlocking instruction.
The P-gear lock unlocking instruction can be sent to the controller by the vehicle according to the unlocking operation of the driver. The unlocking operation includes: the P range is pushed to another shift range (for example, N range), or the driver presses the P range switch, or even the driver operates the vehicle to release the electronic parking brake system from the parking state, and the like, which is not particularly limited herein.
And S15, when the electronic parking brake system is detected to start to enter the release state or the electronic parking brake system is detected to be in the parking state, detecting whether the gradient of the road surface where the vehicle is located is larger than a preset gradient threshold value.
And S16, when the gradient is detected to be larger than a preset gradient threshold value, detecting whether the brake is in a stepping-on state.
When the detected gradient is larger than a preset gradient threshold value, the P gear lock of the vehicle can be locked by indicating the gradient of the road surface where the vehicle is located at present, and whether the brake is in a treading state or not is detected.
Optionally, when it is detected that the gradient is smaller than a preset gradient threshold, the vehicle may be controlled to unlock the P-range lock directly according to the P-range unlock command or not to respond to the P-range unlock command.
And S17, when the brake is detected to be in a treading state, controlling the vehicle to execute a P gear unlocking action according to the P gear unlocking instruction.
Specifically, when the brake is detected to be in a stepping-on state, it is indicated that the downhill force of the vehicle is borne by the brake system (if the electronic parking brake system does not exit from parking at this time, the electronic parking brake system also bears the downhill force of the vehicle), and at this time, the vehicle may be controlled to execute the P-gear unlocking action according to the P-gear unlocking instruction, so that the P-gear lock is smoothly unlocked.
After the P-gear lock is unlocked, the vehicle may control a display device (e.g., a display screen or an indicator lamp) of the vehicle to display N-gear information, which indicates to the driver that the vehicle has been unlocked in the P-gear and the vehicle is currently in the neutral gear, where the N-gear information may be an "N-gear" displayed on the display screen or a light emitting color of the indicator lamp, and is not limited herein.
In the embodiment of the invention, the unlocking action of the P-gear lock is ensured to be executed under the following conditions by detecting the working state of the electronic parking brake system and detecting the braking state of the brake system: the vehicle is in a braking state, and the electronic parking braking system is in a parking state or a releasing state as much as possible, so that the P-gear lock can be smoothly unlocked when the vehicle exits from the P-gear parking state.
Referring to fig. 3, another embodiment of the present invention correspondingly provides a control device for parking a vehicle in P gear, including:
the first detection module 10 is configured to detect whether a current speed of the vehicle is less than a preset speed threshold and whether a gradient of a road surface where the vehicle is currently located is greater than a preset gradient threshold after receiving a P-gear locking instruction;
the second detection module 11 is configured to detect whether an electronic parking brake system of the vehicle is in a parking state when it is detected that the current speed is less than a preset speed threshold and the gradient is greater than a preset gradient threshold;
the third detection module 12 is configured to detect whether a brake is in a stepping-on state when it is detected that the electronic parking brake system is in a parking state;
and the first execution module 13 is configured to control the vehicle to execute a P-gear lock stop operation according to the P-gear lock instruction when it is detected that the brake is not in a stepping-on state.
As an improvement of the above aspect, the control device further includes:
and the response module is used for controlling the vehicle to execute the P gear lock stopping action according to the P gear lock-up instruction when the current speed is detected to be less than a preset speed threshold and the gradient is detected to be less than a preset gradient threshold.
As an improvement of the above aspect, the control device further includes:
the first control module is used for controlling the vehicle to send an electronic parking request prompt to a driver when the electronic parking brake system is detected not to be in a parking state.
As an improvement of the above aspect, the control device further includes:
and the second control module is used for controlling a display device of the vehicle to display the information that the P gear is locked when the brake is detected to be in the treading state until the brake is detected not to be in the treading state.
As a modification of the above scheme, the first execution module 13 includes:
the detection unit is used for detecting whether the automatic parking system is in a hydraulic braking state or not when the brake is detected not to be in a stepping-down state;
the control unit is used for controlling a display device of the vehicle to display the information that the P gear is locked when the automatic parking system is detected to be in the hydraulic braking state until the automatic parking system is detected not to be in the hydraulic braking state;
and the execution unit is used for controlling the vehicle to execute the P gear lock stopping action according to the P gear lock-up instruction when detecting that the automatic parking system is not in a hydraulic braking state.
As a modification of the above, referring to fig. 4, the control device further includes:
the fourth detection module 14 detects the working state of the electronic parking brake system after receiving the P-gear lock unlocking instruction;
the fifth detection module 15 is configured to detect whether a gradient of a road surface where the vehicle is currently located is greater than a preset gradient threshold value when it is detected that the electronic parking brake system starts to enter a release state or it is detected that the electronic parking brake system is in a parking state;
the sixth detection module 16 is configured to detect whether the brake is in a stepping-on state when it is detected that the gradient is greater than a preset gradient threshold;
and the second execution module 17 is configured to control the vehicle to execute a P-gear unlocking action according to the P-gear unlocking instruction when the brake is detected to be in a treading state.
In the embodiment of the invention, when a driver steps on a brake to basically stop a vehicle on a slope and presses a P-gear lock switch, whether the vehicle is stably stopped on the slope and whether the slope where the vehicle is located can cause the P-gear lock of the vehicle to be locked is detected by detecting the speed of the vehicle and the gradient of the road surface where the vehicle is located, then the electronic parking brake system is detected to ensure that the electronic parking brake system locks the rear wheel of the vehicle before the P-gear lock locks the front wheel of the vehicle, then the electronic parking brake system is detected to ensure that the downhill force of the vehicle is completely borne by the electronic parking brake system, and finally the P-gear lock is locked, so that the P-gear lock is ensured not to bear excessive downhill force of the vehicle on the slope after being locked, and the P-gear lock is prevented from being locked because the vehicle is parked on the slope in the P-gear.
Referring to fig. 5, another embodiment of the present invention provides a control system for parking a vehicle in P-range, including: the parking brake system comprises a controller 1, an electronic parking brake system 4, a P-gear switch 2, a P-gear locking device 3 and a brake system 5; the electronic parking brake system 4 is connected with the controller 1 and is used for sending detected parking state information to the controller 1; the P-gear switch 2 is connected with the controller 1 and used for sending a P-gear locking instruction to the controller 1 when the P-gear switch is closed or opened; the P-gear locking device 3 is connected with the controller 1 and is used for executing a P-gear locking action and a P-gear unlocking action under the control of the controller 1; the brake system 5 is connected with the controller 1 and is used for sending the detected brake state information to 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 100 executes the computer program, the controller implements the method for controlling the P-range parking of the vehicle 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.
Specifically, the electronic parking brake system 4 includes an electronic parking brake switch 42, an electronic parking controller 41 and an electronic parking brake device 43; the electronic parking brake switch 42 and the electronic parking brake device 43 are both connected with the electronic parking controller 41; the electronic parking controller 41 is configured to control the electronic parking brake device 43 to perform a vehicle braking action according to a switching signal of the electronic parking brake switch 42, and is further configured to send detected electronic parking state information to the controller 1.
Optionally, the control system for parking in P gear of the vehicle further comprises the above-mentioned automatic parking system 6, and the automatic parking system 6 is connected with the controller 1 and is configured to send the detected hydraulic braking state information to the controller 1.
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 P-range parking of the vehicle.
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 programs and/or modules, and the processor may implement various functions of the control apparatus for P-range parking of the vehicle by operating or executing the computer programs and/or modules 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.
The integrated module/unit of the control device for vehicle P-gear parking may be stored in a computer readable storage medium if it is implemented in the form of a 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, etc. 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 (10)

1. A control method for P-gear parking of a vehicle is characterized by comprising the following steps:
after a P gear locking instruction is received, detecting whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value;
when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be larger than a preset gradient threshold value, whether an electronic parking brake system of the vehicle is in a parking state is detected;
when the electronic parking brake system is detected to be in a parking state, detecting whether a brake is in a stepping-on state;
and when the brake is detected not to be in a treading state, controlling the vehicle to execute P gear lock stopping according to the P gear lock-up instruction.
2. The control method for parking a vehicle in P range according to claim 1, further comprising:
and when the current speed is detected to be smaller than a preset speed threshold value and the gradient is detected to be smaller than a preset gradient threshold value, controlling the vehicle to execute P gear lock stopping operation according to the P gear lock-up instruction.
3. The control method for parking a vehicle in P range according to claim 1, further comprising:
and when the electronic parking brake system is detected not to be in a parking state, controlling the vehicle to send an electronic parking request prompt to a driver.
4. The control method for parking a vehicle in P range according to claim 1, further comprising:
when the brake is detected to be in the treading state, the display device of the vehicle is controlled to display the locking information of the P gear until the brake is detected not to be in the treading state.
5. The method for controlling the P-range parking of the vehicle according to claim 1, wherein the step of controlling the vehicle to execute the P-range lock stop according to the P-range lock instruction when the brake is detected not to be in a depressed state comprises the steps of:
when the brake is detected not to be in a stepping-on state, detecting whether the automatic parking system is in a hydraulic braking state or not;
when the automatic parking system is detected to be in the hydraulic braking state, controlling a display device of the vehicle to display information that the P gear is being locked until the automatic parking system is detected not to be in the hydraulic braking state;
and when the automatic parking system is not in a hydraulic braking state, controlling the vehicle to execute P gear locking action according to the P gear locking instruction.
6. The control method for parking a vehicle in P range according to claim 1, further comprising:
detecting the working state of the electronic parking brake system after receiving a P gear lock unlocking instruction;
when the electronic parking brake system is detected to start to enter a release state or the electronic parking brake system is detected to be in a parking state, detecting whether the gradient of a road surface where a vehicle is located at present is larger than a preset gradient threshold value;
when the gradient is detected to be larger than a preset gradient threshold value, detecting whether a brake is in a treading state;
and when the brake is detected to be in a treading state, controlling the vehicle to execute a P-gear unlocking action according to the P-gear unlocking instruction.
7. A control device for P-gear parking of a vehicle is characterized by comprising:
the first detection module is used for detecting whether the current speed of the vehicle is smaller than a preset speed threshold value and whether the gradient of a road surface where the vehicle is located at present is larger than a preset gradient threshold value or not after a P gear locking instruction is received;
the second detection module is used for detecting whether an electronic parking brake system of the vehicle is in a parking state or not when the current speed is detected to be smaller than a preset speed threshold and the gradient is detected to be larger than a preset gradient threshold;
the third detection module is used for detecting whether the brake is in a stepping-on state or not when the electronic parking brake system is detected to be in the parking state;
and the first execution module is used for controlling the vehicle to execute the P-gear locking stopping action according to the P-gear locking instruction when the brake is detected not to be in a treading state.
8. A controller for P-range parking of a vehicle, comprising 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 P-range parking of a vehicle according to any one of claims 1 to 6 when executing the computer program.
9. A control system for P-gear parking of a vehicle is characterized by comprising: the parking brake system comprises a controller, an electronic parking brake system, a P-gear switch, a P-gear lock device and a brake system; wherein,
the electronic parking brake system is connected with the controller and is used for sending the detected parking state information to the controller;
the P gear switch is connected with the controller and is used for sending a P gear locking instruction to the controller when the P gear switch is closed or opened;
the P gear locking device is connected with the controller and is used for executing a P gear locking action and a P gear unlocking action under the control of the controller;
the brake system is connected with the controller and is used for sending the detected brake state information to 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, wherein the processor implements the control method for P-range parking of the vehicle according to any one of claims 1 to 6 when executing the computer program.
10. A vehicle comprising the control system for P-range parking of a vehicle according to claim 9.
CN201811235397.7A 2018-10-23 2018-10-23 Control method, device, controller and system for vehicle P-gear parking and vehicle Pending CN111089167A (en)

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Application publication date: 20200501