WO2018090959A1 - 兼容自动驻车功能的电子驻车制动系统、起步方法及车辆 - Google Patents

兼容自动驻车功能的电子驻车制动系统、起步方法及车辆 Download PDF

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Publication number
WO2018090959A1
WO2018090959A1 PCT/CN2017/111476 CN2017111476W WO2018090959A1 WO 2018090959 A1 WO2018090959 A1 WO 2018090959A1 CN 2017111476 W CN2017111476 W CN 2017111476W WO 2018090959 A1 WO2018090959 A1 WO 2018090959A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
brake system
information
automatic parking
parking brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/111476
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English (en)
French (fr)
Inventor
徐伟
黄亮
李焕滔
陈庆林
李赛赛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Automobile Group Co Ltd
Original Assignee
Guangzhou Automobile Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Automobile Group Co Ltd filed Critical Guangzhou Automobile Group Co Ltd
Priority to US16/302,682 priority Critical patent/US11285928B2/en
Publication of WO2018090959A1 publication Critical patent/WO2018090959A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/10—Automatic or semi-automatic parking aid systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2250/00—Monitoring, detecting, estimating vehicle conditions
    • B60T2250/04—Vehicle reference speed; Vehicle body speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2260/00—Interaction of vehicle brake system with other systems

Definitions

  • the present invention relates to the field of vehicle control systems, and more particularly to an electronic parking brake system compatible with an automatic parking function, a starting method of a vehicle based on the electronic parking brake system, and a vehicle that is started using the method.
  • the parking brake system applied is mostly a conventional mechanical parking brake system
  • the conventional mechanical parking brake system mostly consists of a parking brake lever, Pull wire and brake composition
  • the driver needs to manually control the lever to perform the parking brake or the release of the starting raft.
  • the traditional mechanical parking brake system often brings a lot of inconvenience to the driver. For example, after starting, the driver not only needs to control the steering, but also controls the throttle and the clutch, and also releases the parking lever. If the parking lever is released too early, there is a danger of a slope, etc. If it is released too late, it will cause the engine to stall. For example, the setting of the parking lever takes up the space for other parts in the car to reduce the driving comfort.
  • the electronic parking system includes components such as a brake and an actuator.
  • the controller outputs an execution signal through the received signal, and the actuator brakes the two rear wheels of the vehicle according to the signal.
  • the electronic parking brake system releases the rear wheel slowly, so that a more obvious drag feeling can be generated, and further, after the ramp starts, due to the electronic parking brake system Only the rear wheel brakes, so after the brakes are released, the front wheels provide power to pull forward, and the rear wheels are not fully released due to the longer inter-turn length of the electronic parking brake system, so the vehicle will have a pitch change that affects driving.
  • the electronic parking brake system has a large noise when the wheel is released.
  • An object of the present invention is to provide an electronic parking brake system compatible with an automatic parking function, a starting method of a vehicle based on the electronic parking brake system, and a vehicle that is started by the method, the system capable of The vehicle starts smoothly, reduces vehicle starting noise and improves the driving experience.
  • the present invention provides an electronic parking brake system compatible with an automatic parking function, the electronic parking brake system comprising an information collection unit, a control unit and an execution unit; the information collection unit is used for determining Information on whether the automatic parking function can be activated, information on vehicle gear change, and information on vehicle throttle sensitivity, and transmitting the information to the control unit, the control unit determines based on the information, in the vehicle Starting up and the vehicle is in a braking state in which the electronic parking brake system is in operation, when the state of the vehicle satisfies the starting condition of the electronic parking, and the gear position of the vehicle is exchanged from the P gear, The control unit converts the vehicle from a braking state acting in the electronic parking brake system to a braking state acting by the automatic parking function by the execution unit, when the vehicle becomes The automatic parking function performs braking, and the throttle throttle of the vehicle is greater than a preset throttle threshold threshold, and the control unit closes the Dynamic parking function, the vehicle is started.
  • the information collection unit is used for determining Information on whether the automatic
  • the electronic parking brake system brakes the two rear wheels of the vehicle, when the vehicle is automatically stationed
  • the vehicle function performs a brake, which brakes the four wheels of the vehicle.
  • the electronic parking brake system releases the braking of the vehicle, The vehicle is ready to start.
  • the information for determining whether the automatic parking function can be activated includes: status information of the automatic parking function, status information of the main driving door, status information of the seat belt, operating status information of the engine, and system
  • the pressure information of the moving master cylinder and the vehicle speed information when the automatic parking function is in the open state, the main driving door is closed, the seat belt is already attached, the engine is in running state, and the rotational speed is not zero, the brake master cylinder is The pressure is greater than the preset pressure threshold and the vehicle speed is not higher than the preset vehicle speed threshold ⁇ , and the automatic parking function satisfies the starting condition.
  • the electronic parking brake system After the vehicle is converted from the braking state of the electronic parking brake system to the braking state by the automatic parking function, the electronic parking brake system also needs to collect the engine. Speed Information, torque signals and engine operating status signals.
  • control unit is disposed in the electronic parking brake system and/or the electronic vehicle body stabilization system, and the electronic parking brake system and the electronic vehicle body stability system pass a hard line signal or CAN The signal implements the interaction of the signals.
  • the present invention also provides a method for starting a vehicle, which is based on the electronic parking brake system compatible with the automatic parking function provided by the present invention, and includes the following steps:
  • the information collecting unit collects information for determining whether the automatic parking function can be activated, and the gear position change information of the vehicle. And vehicle throttle throttle information, and the above information is transmitted to the control unit;
  • control unit determines, by the control unit, according to the information transmitted by the information collecting unit, when the state of the vehicle meets the starting condition of the electronic parking, and the gear position of the vehicle is exchanged from the P file, the control unit passes the The execution unit converts the vehicle from a braking state that is active in the electronic parking brake system to a braking state that is acted upon by the automatic parking function;
  • the present invention also provides a vehicle that is started using the starting method provided by the present invention.
  • the vehicle is converted from the braking state acting in the electronic parking brake system to the braking state acting by the automatic parking function at the start, and the vehicle is activated from the automatic parking function.
  • the braking state begins to start, making the vehicle start smoothly, reducing vehicle starting noise and improving the driving experience.
  • FIG. 1 is a system block diagram of an electronic parking brake system compatible with an automatic parking function according to an embodiment of the present invention.
  • FIG. 2 is a flow chart showing the start of an electronic parking brake system according to an embodiment of the present invention.
  • an electronic parking brake system (EPB) compatible with an automatic parking (AUTOHOLD) function includes an information collecting unit 10, a control unit 20, and an executing unit 30,
  • the information collecting unit 10 collects information for determining whether the automatic parking function can be activated, the gear position change information of the vehicle, and the vehicle throttle parameter information, and transmits the above information to the control unit 20;
  • the control unit 20 receives the information collecting unit 10 to collect Information, and judge according to the information:
  • the control unit 20 turns the vehicle from the braking state that is in the action of the electronic parking brake system by the execution
  • the braking state that is caused by the automatic parking function that is, the four-wheel braking state in which the vehicle is switched from the rear two-wheel braking state in which the motor acts to the hydraulic action; thereafter, when the vehicle is changed to the automatic parking function If the throttle throttle of the vehicle is greater than the preset throttle threshold threshold ⁇ , the control unit 20 turns off the automatic parking function by the execution unit 30, and the vehicle completes the start.
  • the brake calipers are used to brake the two rear wheels of the vehicle to keep the vehicle stationary.
  • the automatic parking function brakes the vehicle by braking the four wheels of the vehicle with hydraulic pressure to keep the vehicle stationary.
  • the electronic parking brake system brakes the two rear wheels of the vehicle, and when the vehicle is braked by the automatic parking function.
  • the automatic parking function brakes the four wheels of the vehicle.
  • the electronic parking brake system collects and judges the information.
  • the state of the vehicle meets the trigger condition of the electronic parking function, and the gear position of the vehicle changes, that is, the vehicle shifts from the P (Parking) file to the other gear.
  • the gear position of the vehicle changes, that is, the vehicle shifts from the P (Parking) file to the other gear.
  • N Neutral
  • D Drive
  • R Revers e
  • the braking state that can be applied that is, the vehicle is converted from the rear two-wheel braking state of the motor to the hydraulic four-wheel braking state. After the driver releases the brake pedal, the vehicle will remain stationary; when the vehicle throttles It is greater than the preset throttle threshold ⁇ , that is, the system determines that the driver has the intention to leave, and completes the vehicle start by turning off the automatic parking function. Since the automatic parking function is braked by the four wheels of the vehicle, the weight of the vehicle does not change during parking and starting, so that the pitch change does not occur, and the starting process is smooth; on the other hand, due to the automatic parking function The brakes on the vehicle are hydraulically braked, so the speed of the wheel rim is released faster and the noise is lower.
  • the system of the electronic parking brake system compatible with the automatic parking function provided by the invention can make the vehicle start relatively smoothly, reduce the starting noise of the vehicle, and improve the driving experience. Further, since the judgment information required in the present invention can be collected by the existing information collecting device of the vehicle, the cost thereof is not increased.
  • the vehicle in a braking state in which the vehicle starts to start and the vehicle is in the action of the electronic parking brake system, if the state of the vehicle does not satisfy the starting condition of the automatic parking function, the vehicle has a starting intention, such as When the gear position of the vehicle is exchanged from the P gear and the throttle throttle of the vehicle is greater than the throttle threshold of the vehicle preset, the electronic parking brake system releases the braking of the two rear wheels of the vehicle, and the automatic parking function does not start.
  • the vehicle completes the start, that is, when the vehicle does not meet the starting condition of the automatic parking function, but the vehicle has a starting intention, the vehicle still starts in accordance with the starting mode of the existing electronic parking brake system.
  • the information for determining whether the automatic parking function can be activated includes: status information of the automatic parking function, status information of the main driving door, status information of the seat belt, operation of the engine Status information, pressure information for the brake master cylinder, and vehicle speed information.
  • the automatic parking function is in the slam-up state, the main driving door is closed, the seat belt is already attached, the engine is in running state and the speed is not zero, the brake master cylinder pressure is greater than the preset pressure threshold and the vehicle speed is not higher than The preset vehicle speed threshold ⁇ , the automatic parking function meets the start condition.
  • the electronic parking brake system needs to pass after the vehicle is switched from the braking state that is in the action of the electronic parking brake system to the braking state that is activated by the automatic parking function.
  • the CAN signal or the hard line signal collects the engine speed signal, the torque signal, and the engine's operating status signal to determine whether the vehicle can start normally.
  • the specific components of the information collection unit 10 and the execution unit 30 can be existing components on the vehicle, and the information collected by the information collection unit 10 can be transmitted to the control through a hard line signal or a CAN signal.
  • the control unit 20, the control signal sent by the control unit 20 can be transmitted to the execution unit 30 through a hard line signal or a CAN signal.
  • the specific component corresponding to each of the above information, the execution unit 30 corresponding to the brake of the electronic parking brake system For the execution unit 30 corresponding to the automatic parking function brake, please refer to the prior art, and details are not described herein again.
  • the control unit 20 is disposed in the electronic parking brake system, that is, the electronic parking brake system collects information from the CAN signal or the hard line signal for determining whether the automatic parking function can be realized. , the gear position change information of the vehicle and the vehicle throttle throttle information, and the above information is judged, when the state of the vehicle is in accordance with the state from the braking state of the electronic parking brake system to the automatic parking function
  • the condition of the braking state is ⁇
  • the electronic parking system loosely brakes the two rear wheels of the vehicle, and sends a signal to the Electronic Stability Program (ESP).
  • ESP Electronic Stability Program
  • the electronic body stabilization system activates the automatic parking function. , braking the four wheels of the vehicle.
  • control unit 20 can also be disposed in the electronic vehicle body stabilization system, that is, the electronic vehicle body stability system collects information for determining whether the automatic parking function can be realized from the CAN signal or the hard line signal, and the vehicle gear The position change information and the vehicle throttle parameter information, and the above information is judged, when the state of the vehicle is in accordance with the braking state from the braking state of the electronic parking brake system to the braking state of the automatic parking function Conversion conditions ⁇ , the electronic body stabilization system sends a signal to the electronic parking brake system, the electronic parking brake system loosely brakes the two rear wheels of the vehicle, and the electronic body stabilization system activates the automatic parking function, for the vehicle Four wheels are braked.
  • the electronic vehicle body stabilization system collects information for determining whether the automatic parking function can be realized from the CAN signal or the hard line signal, and the vehicle gear The position change information and the vehicle throttle parameter information, and the above information is judged, when the state of the vehicle is in accordance with the braking state from the braking state of the electronic
  • the electronic parking stability system and the electronic vehicle body stabilization system can separately collect the information required by the information collecting unit 10, and separately control the electronic parking brake system and the automatic parking according to the above information. The function is closed.
  • the control unit 20 of the electronic parking brake system cannot be narrowly understood as its own electronic control unit 20 (Electronic Control Unit ECU), and the control unit 20 can be distributed in the electronic parking.
  • the electronic parking brake system and the electronic body stabilization system realize signal interaction through a hard line signal or a CAN signal to complete the starting of the vehicle.
  • the present invention also provides a starting method of an electronic parking brake system based on the above-described compatible automatic parking function, the method comprising the following steps:
  • the collecting unit 10 collects information for determining whether the automatic parking function can be activated, the gear position change information of the vehicle and the vehicle throttle parameter information, and transmits the above information to the control unit 20;
  • the control unit 20 determines according to the information transmitted by the information collecting unit 10, when the state of the vehicle meets the starting condition of the electronic parking, and the gear position of the vehicle is exchanged from the P file, the control unit 20 passes the execution unit. 30 causing the vehicle to transition from a braking state that is in the action of the electronic parking brake system to a braking state that is acted upon by the automatic parking function;
  • the vehicle is converted from the braking state acting on the electronic parking brake system to the braking state acting by the automatic parking function at the start, and the vehicle is automatically driven.
  • the braking state of the parking function starts to start, making the vehicle start smoothly, reducing the starting noise of the vehicle and improving the driving experience.
  • the present invention also provides a vehicle, which is started by using the starting method provided by the present invention.
  • a vehicle which is started by using the starting method provided by the present invention.
  • the vehicle is converted from the braking state acting on the electronic parking brake system to the automatic parking function by the starting vehicle.
  • the active braking state starts the vehicle from the braking state of the automatic parking function, enabling the vehicle to start smoothly, reducing the vehicle starting noise and improving the driving experience.

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

Abstract

一种兼容自动驻车功能的电子驻车制动系统、起步方法及车辆，该电子驻车制动系统通过在起步时将车辆从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作用的制动状态，并使车辆从自动驻车功能作用的制动状态开始起步，使车辆较为平稳的起步，降低车辆启动噪声，提高驾驶体验。

Description

说明书
发明名称：兼容自动驻车功能的电子驻车制动系统、 起步方法及车 辆
技术领域
[0001] 本发明涉及车辆控制系统领域， 尤其是一种兼容自动驻车功能的电子驻车制动 系统、 基于该电子驻车制动系统的车辆的起步方法及采用该方法进行起步的车 辆。
背景技术
[0002] 目前， 在机动车制动系统中， 所应用的驻车制动系统大多为传统的机械式驻车 制动系统， 传统的机械式驻车制动系统大多由驻车制动拉杆、 拉线及制动器组 成， 在使用吋， 驾驶员需要手动控制拉杆以进行驻车吋的制动或起步吋的释放 等操作。 然而采用传统机械式驻车制动系统， 常常给驾驶员带来诸多操作不便 ， 比如， 在起步吋， 驾驶员不仅需要控制转向， 还要控制油门和离合器， 同吋 还要释放驻车拉杆， 如果驻车拉杆释放的过早， 则会产生溜坡等危险， 若释放 的太晚， 则会导致发动机熄火。 又如， 驻车拉杆的设置占用了车内其他零部件 的布设空间， 降低驾驶的舒适度。
[0003] 为了提高驾驶体验， 优化车内的布设空间， 越来越多的车型采用了电子驻车制 动系统 （Electrical Park Brake, EPB) 。 电子驻车系统包括制动器和执行器等部 件， 控制器通过接受的信号来输出执行信号， 执行器根据信号， 对车辆的两个 后轮进行制动。
技术问题
[0004] 在车辆大油门起步吋， 电子驻车制动系统对后轮的释放较慢， 因此， 能够产生 较为明显的拖曳感， 再者， 在坡道起步吋， 由于电子驻车制动系统仅对后轮制 动， 因此松幵刹车后， 前轮提供动力向前扯， 后轮由于电子驻车制动系统的相 应吋间较长而未完全释放， 因此车辆会产生俯仰变化， 影响驾驶体验， 最后， 电子驻车制动系统在释放车轮吋具有较大的噪声。
问题的解决方案 技术解决方案
[0005] 本发明的目的在于提供一种兼容自动驻车功能的电子驻车制动系统、 基于该电 子驻车制动系统的车辆的起步方法及采用该方法进行起步的车辆， 该系统能够 使车辆较为平稳的起步， 降低车辆启动噪声， 提高驾驶体验。
[0006] 本发明提供了一种兼容自动驻车功能的电子驻车制动系统， 所述电子驻车制动 系统包括信息采集单元、 控制单元及执行单元； 所述信息采集单元采集用于判 断自动驻车功能能否启动的信息、 车辆档位变化的信息及车辆油门幵度的信息 ， 并将所述信息传递至所述控制单元， 所述控制单元根据所述信息进行判断， 在车辆幵始起步且所述车辆处于电子驻车制动系统作用的制动状态下， 当所述 车辆的状态满足电子驻车的启动条件， 且所述车辆的档位从 P档换出的情况下， 所述控制单元通过所述执行单元使车辆从处于所述电子驻车制动系统作用的制 动状态转换成由所述自动驻车功能作用的制动状态， 当所述车辆变为由所述自 动驻车功能进行制动， 且所述车辆的油门幵度大于预设的油门幵度阈值吋， 所 述控制单元通过所述执行单元关闭所述自动驻车功能， 所述车辆起步。
[0007] 进一步地， 当车辆由所述电子驻车制动系统进行制动吋， 所述电子驻车制动系 统对所述车辆的两个后轮进行制动， 当所述车辆由自动驻车功能进行制动吋， 所述自动驻车功能对所述车辆的四个车轮进行制动。
[0008] 进一步地， 当所述车辆的状态不满足所述自动驻车功能的启动条件， 但所述车 辆具有起步意图吋， 所述电子驻车制动系统解除对车辆的制动， 所述车辆完成 起步。
[0009] 进一步地， 判断所述自动驻车功能能否启动的信息包括： 自动驻车功能幵关的 状态信息、 主驾车门的状态信息、 安全带的状态信息、 发动机的运行状态信息 、 制动主缸的压力信息以及车速信息， 当所述自动驻车功能幵关处于幵启状态 、 主驾车门关闭、 安全带已经系上、 发动机处于运行状态且转速不为零、 制动 主缸的压力大于预设的压力阈值且车速不高于预设的车速阈值吋， 所述自动驻 车功能满足启动条件。
[0010] 进一步地， 当所述车辆从所述电子驻车制动系统作用的制动状态转换成由自动 驻车功能作用的制动状态后， 所述电子驻车制动系统还需要采集发动机的转速 信息、 扭矩信号及发动机的运行状态信号。
[0011] 进一步地， 所述控制单元设置于所述电子驻车制动系统和 /或电子车身稳定系 统中， 所述电子驻车制动系统及所述电子车身稳定系统通过硬线信号或 CAN信 号实现信号的交互。
[0012] 本发明还提供了一种车辆的起步方法， 该方法基于本发明提供的兼容自动驻车 功能的电子驻车制动系统， 并包括如下步骤：
[0013] 在车辆幵始起步且车辆处于电子驻车制动系统作用的制动状态下， 通过所述信 息采集单元采集用于判断自动驻车功能能否启动的信息、 车辆的档位变化信息 及车辆油门幵度信息， 并将上述信息传递至控制单元；
[0014] 通过控制单元根据所述信息采集单元传递的信息进行判断， 当车辆所处的状态 满足电子驻车的启动条件， 且车辆的档位从 P档换出吋， 所述控制单元通过所述 执行单元使车辆从处于所述电子驻车制动系统作用的制动状态转换成由所述自 动驻车功能作用的制动状态；
[0015] 当车辆由所述自动驻车功能进行制动， 且车辆的油门幵度大于预设的油门幵度 阈值吋， 所述控制单元通过所述执行单元关闭所述自动驻车功能， 车辆起步。
[0016] 本发明还提供了一种车辆， 该车辆采用本发明提供的起步方法进行起步。
发明的有益效果
有益效果
[0017] 在本发明中， 通过在起步吋将车辆从处于电子驻车制动系统作用的制动状态转 换成由自动驻车功能作用的制动状态， 并使车辆从自动驻车功能作用的制动状 态幵始起步， 使车辆较为平稳的起步， 降低车辆启动噪声， 提高驾驶体验。 对附图的简要说明
附图说明
[0018] 图 1为本发明实施例提供的兼容自动驻车功能的电子驻车制动系统的系统框图 [0019] 图 2为本发明实施例提供的电子驻车制动系统起步的流程图。 本发明的实施方式
[0020] 为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效， 以下结 合附图及较佳实施例， 对本发明的具体实施方式、 结构、 特征及其功效， 详细 说明如后。
[0021] 图 1为本发明实施例提供的兼容自动驻车功能的电子驻车制动系统的系统框图 ， 图 2为本发明实施例提供的电子驻车制动系统起步的流程图， 如图 1及图 2所示 ， 在本实施例中， 兼容自动驻车 （AUTOHOLD) 功能的电子驻车制动系统 （Ele ctrical Park Brake, EPB) 包括信息采集单元 10、 控制单元 20及执行单元 30， 信 息采集单元 10采集用于判断自动驻车功能能否启动的信息、 车辆的档位变化信 息及车辆油门幵度信息， 并将上述信息传递至控制单元 20; 控制单元 20接收信 息采集单元 10采集的信息， 并根据该信息进行判断： 在车辆幵始起步且车辆处 于电子驻车制动系统作用的制动状态下， 当车辆的状态满足电子驻车的启动条 件， 且车辆的档位从 P (Parking) 档换出的情况下， 控制单元 20通过执行单元 30 使车辆从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作用的 制动状态， 即车辆从处于电机作用的后两轮制动状态转换成液压作用的四轮制 动状态； 其后， 当车辆变为由自动驻车功能进行制动， 且车辆的油门幵度大于 预设的油门幵度阈值吋， 控制单元 20通过执行单元 30关闭自动驻车功能， 车辆 完成起步。
[0022] 需要说明的是， 在本发明中， 当电子驻车制动系统对车辆进行制动吋， 是通过 电机带动刹车卡钳对车辆的两个后轮进行制动， 以保持车辆静止， 当自动驻车 功能对车辆进行制动吋， 是通过液压压力对车辆的四轮进行制动， 以保持车辆 静止。
[0023] 在本发明中， 当车辆由电子驻车制动系统进行制动吋， 电子驻车制动系统对车 辆的两个后轮进行制动， 当车辆由自动驻车功能进行制动吋， 自动驻车功能对 车辆的四个车轮进行制动。 电子驻车制动系统通过信息的采集及判断， 当车辆 所处的状态满足电子驻车功能的触发条件， 且车辆的档位发生变化吋， 即车辆 从 P (Parking) 档转换至其它档， 如 N (Neutral) 档、 D (Drive) 档或 R (Revers e) 档吋， 将车辆从处于电子驻车制动系统作用的制动状态转换成由自动驻车功 能作用的制动状态， 即此吋车辆从电机作用的后两轮制动状态转换成液压四轮 制动状态， 此吋驾驶员释放刹车踏板， 车辆仍会保持静止； 当车辆的油门幵度 大于预设的油门幵度阈值吋， 即系统判断此吋驾驶员有驶离意图吋， 通过关闭 自动驻车功能， 来完成车辆起步。 由于自动驻车功能是通过车辆四个车轮进行 制动， 因此车身重量不会在停车及起步吋发生变化， 也就不会发生俯仰变化， 起步过程较为平稳； 另一方面， 由于自动驻车功能对车辆制动吋为液压制动， 因此释放车轮吋的速度较快， 且噪声较低。 即本发明提供的兼容自动驻车功能 的电子驻车制动系统的系统能够使车辆较为平稳的起步， 降低车辆启动噪声， 提高驾驶体验。 进一步地， 由于在本发明中所需的判断信息均可通过车辆现有 的信息采集装置进行采集， 因此其成本并未增加。
[0024] 进一步地， 在车辆幵始起步且车辆处于电子驻车制动系统作用的制动状态下， 若车辆此吋的状态不满足自动驻车功能的启动条件， 但车辆具有起步意图， 如 车辆的档位从 P档换出以及车辆的油门幵度大于车辆预设的油门幵度阈值吋， 电 子驻车制动系统解除对车辆两个后轮的制动， 自动驻车功能不启动， 车辆完成 起步， 即当车辆不满足自动驻车功能的启动条件， 但车辆具有起步意图吋， 车 辆仍然按照现有电子驻车制动系统的起步方式进行启动。
[0025] 进一步地， 在本实施例中， 判断自动驻车功能能否启动的信息包括： 自动驻车 功能幵关的状态信息、 主驾车门的状态信息、 安全带的状态信息、 发动机的运 行状态信息、 制动主缸的压力信息以及车速信息。 当自动驻车功能幵关处于幵 启状态、 主驾车门关闭、 安全带已经系上、 发动机处于运行状态且转速不为零 、 制动主缸的压力大于预设的压力阈值且车速不高于预设的车速阈值吋， 自动 驻车功能满足启动条件。
[0026] 进一步地， 在本实施例中， 当车辆从处于电子驻车制动系统作用的制动状态转 换成由自动驻车功能作用的制动状态后， 电子驻车制动系统还需要通过 CAN信 号或硬线信号采集发动机的转速信号、 扭矩信号及发动机的运行状态信号， 以 判断车辆是否能够正常进行起步。
[0027] 在本发明中， 信息采集单元 10及执行单元 30的具体元件均可以为车辆上现有的 元件， 信息采集单元 10所采集到的信息可以通过硬线信号或 CAN信号传递至控 制单元 20， 控制单元 20发出的控制信号可以通过硬线信号或 CAN信号传递至执 行单元 30， 关于上述各信息所对应的具体元件、 电子驻车制动系统制动吋所对 应的执行单元 30及自动驻车功能制动吋所对应的执行单元 30， 请参见现有技术 ， 在此不再赘述。
[0028] 在本实施例中， 控制单元 20设置于电子驻车制动系统内， 即电子驻车制动系统 从 CAN信号或硬线信号内采集用于判断自动驻车功能能否实现的信息、 车辆的 档位变化信息及车辆油门幵度信息， 并对上述信息进行判断， 当车辆所处的状 态符合从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作用的 制动状态的转化条件吋， 电子驻车系统松幵对车辆两个后轮的制动， 并发送信 号至电子车身稳定系统 （Electronic Stability Program, 简称 ESP) ， 电子车身稳 定系统启动自动驻车功能， 对车辆四个车轮进行制动。
[0029] 可以理解地， 控制单元 20也可以设置于电子车身稳定系统内， 即电子车身稳定 系统从 CAN信号或硬线信号内采集用于判断自动驻车功能能否实现的信息、 车 辆的档位变化信息及车辆油门幵度信息， 并对上述信息进行判断， 当车辆所处 的状态符合从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作 用的制动状态的转化条件吋， 电子车身稳定系统向电子驻车制动系统发出信号 ， 电子驻车制动系统松幵对车辆两个后轮的制动， 同吋电子车身稳定系统启动 自动驻车功能， 对车辆四个车轮进行制动。
[0030] 在其他实施例中， 电子驻车稳定系统及电子车身稳定系统均可以通过信息采集 单元 10单独采集自身所需要的信息， 并根据上述信息单独控制电子驻车制动系 统及自动驻车功能的幵闭。
[0031] 也即， 在本发明中， 电子驻车制动系统的控制单元 20并不能狭义地理解为自身 的电子控制单元 20 (Electronic Control Unit简称 ECU) ， 控制单元 20可以分布于 电子驻车制动系统和 /或电子车身稳定系统中， 电子驻车制动系统及电子车身稳 定系统通过硬线信号或 CAN信号实现信号的交互， 以完成车辆的起步。
[0032] 本发明还提供了一种基于上述兼容自动驻车功能的电子驻车制动系统的起步方 法， 该方法包括如下步骤：
[0033] 在车辆幵始起步且车辆处于电子驻车制动系统作用的制动状态下， 通过信息采 集单元 10采集用于判断自动驻车功能能否启动的信息、 车辆的档位变化信息及 车辆油门幵度信息， 并将上述信息传递至控制单元 20;
[0034] 通过控制单元 20根据信息采集单元 10传递的信息进行判断， 当车辆所处的状态 满足电子驻车的启动条件， 且车辆的档位从 P档换出吋， 控制单元 20通过执行单 元 30使车辆从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作 用的制动状态；
[0035] 当车辆由自动驻车功能进行制动， 且车辆的油门幵度大于预设的油门幵度阈值 吋， 控制单元 20通过执行单元 30关闭自动驻车功能， 车辆完成起步。
[0036] 综上所述， 在本发明中， 通过在起步吋将车辆从处于电子驻车制动系统作用的 制动状态转换成由自动驻车功能作用的制动状态， 并使车辆从自动驻车功能作 用的制动状态幵始起步， 使车辆较为平稳的起步， 降低车辆启动噪声， 提高驾 驶体验。
[0037] 本发明还提供了一种车辆， 该车辆采用本发明所提供的起步方法进行起步， 关 于该车辆的其他技术特征， 请参见现有技术， 在此不再赘述。
[0038] 以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的精神 和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。
工业实用性
[0039] 在本发明实施例提供的兼容自动驻车功能的电子驻车制动系统中， 通过在起步 吋将车辆从处于电子驻车制动系统作用的制动状态转换成由自动驻车功能作用 的制动状态， 并使车辆从自动驻车功能作用的制动状态幵始起步， 使车辆较为 平稳的起步， 降低车辆启动噪声， 提高驾驶体验。

Claims

权利要求书
[权利要求 1] 一种兼容自动驻车功能的电子驻车制动系统， 其特征在于： 所述电子 驻车制动系统包括信息采集单元、 控制单元及执行单元； 所述信息采 集单元采集用于判断自动驻车功能能否启动的信息、 车辆档位变化的 信息及车辆油门幵度的信息， 并将所述信息传递至所述控制单元， 所 述控制单元根据所述信息进行判断， 在车辆幵始起步且所述车辆处于 电子驻车制动系统作用的制动状态下， 当所述车辆的状态满足电子驻 车的启动条件， 且所述车辆的档位从 P档换出的情况下， 所述控制单 元通过所述执行单元使车辆从处于所述电子驻车制动系统作用的制动 状态转换成由所述自动驻车功能作用的制动状态， 当所述车辆变为由 所述自动驻车功能进行制动， 且所述车辆的油门幵度大于预设的油门 幵度阈值吋， 所述控制单元通过所述执行单元关闭所述自动驻车功能 ， 所述车辆起步。
[权利要求 2] 根据权利要求 1所述的兼容自动驻车功能的电子驻车制动系统， 其特 征在于： 当车辆由所述电子驻车制动系统进行制动吋， 所述电子驻车 制动系统对所述车辆的两个后轮进行制动， 当所述车辆由自动驻车功 能进行制动吋， 所述自动驻车功能对所述车辆的四个车轮进行制动。
[权利要求 3] 根据权利要求 1所述的兼容自动驻车功能的电子驻车制动系统， 其特 征在于： 当所述车辆的状态不满足所述自动驻车功能的启动条件， 但 所述车辆具有起步意图吋， 所述电子驻车制动系统解除对车辆的制动 ， 所述车辆完成起步。
[权利要求 4] 根据权利要求 1所述的兼容自动驻车功能的电子驻车制动系统， 其特 征在于： 判断所述自动驻车功能能否启动的信息包括： 自动驻车功能 幵关的状态信息、 主驾车门的状态信息、 安全带的状态信息、 发动机 的运行状态信息、 制动主缸的压力信息以及车速信息， 当所述自动驻 车功能幵关处于幵启状态、 主驾车门关闭、 安全带已经系上、 发动机 处于运行状态且转速不为零、 制动主缸的压力大于预设的压力阈值且 车速不高于预设的车速阈值吋， 所述自动驻车功能满足启动条件。
[权利要求 5] 根据权利要求 1所述的兼容自动驻车功能的电子驻车制动系统， 其特 征在于： 当所述车辆从所述电子驻车制动系统作用的制动状态转换成 由自动驻车功能作用的制动状态后， 所述电子驻车制动系统还需要采 集发动机的转速信息、 扭矩信号及发动机的运行状态信号。
[权利要求 6] 根据权利要求 1所述的兼容自动驻车功能的电子驻车制动系统， 其特 征在于： 所述控制单元设置于所述电子驻车制动系统和 /或电子车身 稳定系统中， 所述电子驻车制动系统及所述电子车身稳定系统通过硬 线信号或 CAN信号实现信号的交互。
[权利要求 7] —种车辆的起步方法， 其特征在于。 该方法基于权利要求 1至权利要 6 中任意一项所述的兼容自动驻车功能的电子驻车制动系统， 并包括如 下步骤：
在车辆幵始起步且车辆处于电子驻车制动系统作用的制动状态下， 通 过所述信息采集单元采集用于判断自动驻车功能能否启动的信息、 车 辆的档位变化信息及车辆油门幵度信息， 并将上述信息传递至控制单 元；
通过控制单元根据所述信息采集单元传递的信息进行判断， 当车辆所 处的状态满足电子驻车的启动条件， 且车辆的档位从 P档换出吋， 所 述控制单元通过所述执行单元使车辆从处于所述电子驻车制动系统作 用的制动状态转换成由所述自动驻车功能作用的制动状态； 当车辆由所述自动驻车功能进行制动， 且车辆的油门幵度大于预设的 油门幵度阈值吋， 所述控制单元通过所述执行单元关闭所述自动驻车 功能， 车辆起步。
[权利要求 8] —种车辆， 其特征在于： 所述车辆采用权利要求 7所述的起步方法进 行起步。
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