WO2022032976A1 - 一种适用于at车型的发动机启机驻车制动保持控制方法 - Google Patents

一种适用于at车型的发动机启机驻车制动保持控制方法 Download PDF

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WO2022032976A1
WO2022032976A1 PCT/CN2020/141904 CN2020141904W WO2022032976A1 WO 2022032976 A1 WO2022032976 A1 WO 2022032976A1 CN 2020141904 W CN2020141904 W CN 2020141904W WO 2022032976 A1 WO2022032976 A1 WO 2022032976A1
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state
signal
hsm
function
pressure
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PCT/CN2020/141904
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English (en)
French (fr)
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闫鲁平
徐华林
官浩
隋清海
郝占武
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中国第一汽车股份有限公司
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Publication of WO2022032976A1 publication Critical patent/WO2022032976A1/zh

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    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to an engine start-up parking brake holding control method suitable for an AT vehicle type, and belongs to the technical field of engine start-up parking brake holding.
  • the existing AVH (Automatic Parking Hold) function can only be avoided when the driver manually turns on the AVH function, not every time the engine is started.
  • Patent Document 1 discloses a control device for controlling a vehicle, including a travel control unit capable of executing stop hold control in at least two functions of an automatic brake hold function and a one-pedal function, and the automatic brake hold function is controlled.
  • a travel control unit capable of executing stop hold control in at least two functions of an automatic brake hold function and a one-pedal function, and the automatic brake hold function is controlled.
  • the one-pedal function controls both the driving force and the braking force of the vehicle according to the operation amount of the accelerator pedal.
  • the output control unit capable of displaying the first indicator and the second indicator on the display device of the vehicle, and the running control unit exclusively executes the automatic braking hold function and the one-pedal function, the output control unit performs at least one of the following controls: when the first transition is performed, the display of the second indicator is terminated and the first indicator is displayed; and when the second transition is performed, the first indicator is terminated. Display of an indicator and display of a second indicator.
  • Patent Document 2 discloses an automatic brake hold in the case of low-speed maneuverability, and the transport vehicle has an automatic hold selector such as a push button switch or other Human Machine Interface (HMI).
  • a gear selector in a vehicle includes a forward gear position and a reverse gear position.
  • the brake pedal can be depressed by the driver to actuate the brake actuators when slowing or stopping the vehicle.
  • the control circuit is configured to activate a brake actuator in response to a predetermined condition including an automatic hold selector open and the vehicle brakes to a stop as the brake pedal is depressed, wherein if the gear selector is in reverse position, the brake hold event is prevented from being initiated. If a brake hold event is in progress, shifting the gear selector to reverse will terminate the brake hold event.
  • Low speed maneuvers - such as parking the vehicle - can be performed without the need to manually cancel the automatic hold feature.
  • Patent Document 3 provides a control device for a vehicle that appropriately executes automatic stop of an internal combustion engine in accordance with the permission or prohibition state of the operation of the brake device for braking and holding the vehicle in a stopped state, thereby enabling a good start of the vehicle performance and automatic stop to achieve improved fuel efficiency.
  • the present invention is a control device for a vehicle that automatically stops the internal combustion engine when a predetermined stop condition is satisfied, and automatically restarts the internal combustion engine when a predetermined restart condition is satisfied.
  • the control device has a braking device for braking and maintaining the vehicle (V) in a stopped state.
  • the permission or prohibition of the operation of the braking device is designated by an ABH backup switch operated by the driver of the vehicle. When the operation of the braking device is permitted, the predetermined stop condition for automatically stopping the internal combustion engine is changed to the more severe side.
  • the present invention provides an engine starter suitable for an AT vehicle.
  • the parking brake hold control method adds the HSM function to maintain pressure on the wheels when the engine is started, and release the pressure after a certain period of time, so as not to cause the vehicle to roll over.
  • An engine start-up parking brake holding control method suitable for an AT model comprising the following steps:
  • S1.ESC (Electronic Stability Control, body stability control) unit assembly simultaneously receives CAN signal, hard wire signal and internal sensor signal;
  • the ESC unit assembly judges the validity of the received signal, and judges the HSM (Hold Support for Motor startstop, engine start parking brake hold) working state through the received signals;
  • the HSM function starts: the ESC unit assembly sends the HSM current working state signal to the gateway through the CAN line; calculates and stores the wheel cylinder pressure signal; body controller) to send the brake light signal to turn on the brake light;
  • the CAN signal received by the ESC unit assembly includes:
  • Accelerator pedal signal, engine status signal, engine speed signal, engine torque signal sent by the engine management system is a signal sent by the engine management system.
  • the hard-wired signal received by the ESC unit assembly includes: a wheel speed sensor signal.
  • the internal sensor signals received by the ESC unit assembly include:
  • the HSM working state includes: a standby state, a pressure maintaining state, and a function-off state.
  • the HSM function is not activated
  • the HSM function is activated and the pressure is maintained for a period of time;
  • the HSM working state is switched from the pressure maintaining state to the function closing state, the HSM function is not activated, and the brake pressure begins to be released.
  • the HSM function is activated, and the pressure maintaining time is 2S.
  • transition condition of the HSM working state is:
  • transition conditions from the function off state to the standby state are: ESC estimates that the wheel cylinder pressure release is completed according to the wheel cylinder pressure model;
  • transition conditions from the standby state or the function off state to the pressure holding state are: the gradient is less than 5%, and the driver depresses the brake, and the accelerator opening is less than 2%, and the engine start-stop is activated, and the parking brake is activated. not activated;
  • the conditions for switching from the pressure holding state to the function off state are: the vehicle is driven away; or the pressure holding is overtime; or the parking brake is activated; or the whole vehicle is powered off; or the engine is turned off.
  • the pressure maintaining time-out means that the pressure maintaining time exceeds 2S.
  • the invention maintains the pressure of the wheels when the engine is started, and releases the pressure after a certain period of time, so as not to cause the vehicle to roll over.
  • the vehicle rollover problem can be avoided only when the driver manually turns on the automatic parking hold function.
  • the hold function can recognize the working condition and automatically turn on the function to avoid the vehicle from shaking.
  • FIG. 1 is a schematic block diagram of an engine start-up parking brake holding control method suitable for an AT vehicle type according to the present invention
  • FIG. 2 is a schematic diagram of the transition flow of the engine starting parking brake holding state machine according to the present invention.
  • an engine start-up parking brake hold control method suitable for an AT model includes the following steps:
  • S1.ESC (Electronic Stability Control, body stability control) unit assembly simultaneously receives CAN signal, hard wire signal and internal sensor signal;
  • the CAN signals received by the ESC unit assembly include:
  • Accelerator pedal signal, engine status signal, engine speed signal, engine torque signal sent by the engine management system is a signal sent by the engine management system.
  • the hard-wired signals received by the ESC unit assembly include: wheel speed sensor signals.
  • the internal sensor signals received by the ESC unit assembly include:
  • the ESC unit assembly judges the validity of the received signal, and judges the HSM (Hold Support for Motor startstop, engine start parking brake hold) working state through the received signals;
  • the HSM working states include: a standby state, a pressure maintaining state, and a function-off state.
  • the HSM function starts: the ESC unit assembly sends the HSM current working state signal to the gateway through the CAN line; calculates and stores the wheel cylinder pressure signal; body controller) to send the brake light signal to turn on the brake light;
  • the transition conditions of the HSM working state are:
  • transition conditions from the function off state to the standby state are: ESC estimates that the wheel cylinder pressure release is completed according to the wheel cylinder pressure model;
  • transition conditions from the standby state or the function off state to the pressure holding state are: the gradient is less than 5%, and the driver depresses the brake, and the accelerator opening is less than 2%, and the engine start-stop is activated, and the parking brake is activated. not activated;
  • the conditions for switching from the pressure hold state to the function off state are: the vehicle drives away; or the pressure hold time out (maximum 2s); or the parking brake is activated; or the whole vehicle is powered off; or the engine is turned off.

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

Abstract

一种适用于AT车型的发动机启机驻车制动保持控制方法，ESC单元总成同时接收CAN信号、硬线信号及内部传感器信号；ESC单元总成判断接收到的信号的有效性，并通过接收的各信号判断HSM工作状态；当HSM工作状态转换为压力保持状态时，则HSM功能启动，ESC单元总成通过CAN线向网关发送HSM当前工作状态信号；计算并存储轮缸压力信号；向BCM（车身控制器）发送制动灯信号，点亮制动灯；当HSM工作状态转换为功能关闭状态时，则HSM功能关闭。

Description

一种适用于AT车型的发动机启机驻车制动保持控制方法 技术领域
本发明涉及一种适用于AT车型的发动机启机驻车制动保持控制方法，属于发动机启机驻车制动保持技术领域。
背景技术
对于AT变速箱的传统燃油车，在发动机停机再次启机时，由于启机冲击较大，导致车辆有较大的耸动感。
现有AVH(自动驻车保持)功能只有当驾驶员手动开启AVH功能后该问题才可以规避，不是每次发动机启机都可以避免。
专利文献1公开了一种用于控制车辆的控制装置，具备：行驶控制部，其至少能在自动制动保持功能和单踏板功能两个功能中执行停止保持控制，自动制动保持功能在制动踏板被踩下而车辆停止的情况下，不依赖制动踏板的操作量而保持车辆的停止状态，单踏板功能根据加速踏板的操作量来控制车辆的驱动力和制动力双方，且在停止后不依赖制动踏板的操作量而保持车辆的停止状态；以及输出控制部，其能将第一指示标和第二指示标显示于车辆的显示装置，行驶控制部排他性地执行自动制动保持功能和单踏板功能，输出控制部至少进行如下控制的一方：在进行第一转换的情况下，结束第二指示标的显示并显示第一指示标；以及在进行第二转换的情况下，结束第一指示标的显示并显示第二指示标。
专利文献2公开了一种在低速操纵性的情况下的自动制动保持，运输车辆具有自动保持选择器，比如按钮开关或其它人机界面(HMI)。车辆中的挡位选择器包括前进挡位置和倒车挡位置。制动踏板可以由驾驶员压下以当减慢或停止车辆时驱动制动执行器。控制电路被配置为响应于包括自动保持选择器开启且随着制动踏板被压下车辆制动到停止的预定条件而启动制动执行器的制动保持事件，其中如果挡位选择器处于倒车挡位置，则阻止启动制动保持事件。如果 制动保持事件在进行中，则将挡位选择器转换到倒车挡使制动保持事件终止。低速操纵——比如停放车辆——可以被执行而不需要手动地取消自动保持部件。
专利文献3提供一种车辆的控制装置，其根据将车辆制动并保持在停车状态的制动装置的工作的允许或禁止状态，适当执行内燃机的自动停止，由此能通过车辆的良好的起步性和自动停止实现燃料效率的提高。本发明是车辆的控制装置，其在规定的停止条件成立时使内燃机自动停止，在规定的重新起动条件成立时使内燃机自动重新起动。该控制装置具有用于将车辆(V)制动并保持在停车状态的制动装置。该制动装置的工作的允许或禁止是通过由车辆的驾驶员操作的ABH备用开关来指定的。在允许制动装置的工作时，向更严格的一侧变更使内燃机自动停止的规定的停止条件。
发明内容
为了解决对于AT变速箱的传统燃油车，在发动机停机再次启机时，由于启机冲击较大，导致车辆有较大的耸动感的问题，本发明提供一种适用于AT车型的发动机启机驻车制动保持控制方法，增加HSM功能，在发动机启机时给车轮保压，一定时间后压力释放，这样不会导致车辆耸车。
本发明的目的是通过以下技术实现的：
一种适用于AT车型的发动机启机驻车制动保持控制方法，包括以下步骤：
S1.ESC(Electronic Stability Control，车身稳定控制)单元总成同时接收CAN信号、硬线信号及内部传感器信号；
S2.ESC单元总成判断接收到的信号的有效性，并通过接收的各信号判断HSM(Hold Support for Motor startstop，发动机启机驻车制动保持)工作状态；
S3.当ESC单元总成判断HSM工作状态转换为压力保持状态时，则HSM功能启动：ESC单元总成通过CAN线向网关发送HSM当前工作状态信号；计算并存储轮缸压力信号；向BCM(车身控制器)发送制动灯信号，点亮制动灯；
S4.当ESC单元总成判断HSM工作状态转换为功能关闭状态时，则HSM 功能关闭。
进一步地，所述ESC单元总成接收的CAN信号包括：
变速箱发出的目标挡位信号和倒车挡位信号；
驻车信号；
制动灯开关信号；
发动机管理系统发出的加速踏板信号、发动机状态信号、发动机转速信号、发动机扭矩信号。
进一步地，所述ESC单元总成接收的硬线信号包括：轮速传感器信号。
进一步地，所述ESC单元总成接收的内部传感器信号包括：
主缸压力传感器信号；
纵向加速度信号；
横摆角速度信号。
进一步地，所述HSM工作状态包括：待机状态、压力保持状态、功能关闭状态。
更进一步地，所述HSM工作状态处于待机状态时，HSM功能不激活；
所述HSM工作状态转换到压力保持状态后，HSM功能激活，并保压一段时间；
所述HSM工作状态由压力保持状态转换到功能关闭状态后，HSM功能不激活，且制动压力开始泄压。
更进一步地，所述HSM工作状态转换到压力保持状态后，HSM功能激活，保压时间为2S。
更进一步地，所述HSM工作状态的转换条件为：
1)由功能关闭状态转换到待机状态的转换条件为：ESC根据轮缸压力模型估算轮缸压力释放完成；
2)由待机状态或功能关闭状态转换到压力保持状态的转换条件为：坡度小于5％，且驾驶员踩制动，且油门开度小于2％，且发动机启停激活，且驻车制动不激活；
3)由压力保持状态转换到功能关闭状态的条件为：车辆驶离；或保压超时；或驻车制动激活；或整车下电；或发动机熄火。
更进一步地，所述HSM工作状态由压力保持状态转换到功能关闭状态的条件中，保压超时指保压时间超过2S。
本发明具有以下有益效果：
本发明通过增加发动机启机驻车制动保持功能，在发动机启机时给车轮保压，一定时间后压力释放，这样不会导致车辆耸车。与现有自动驻车保持功能相比，只有当驾驶员手动开启自动驻车保持功能后，车辆耸车问题才可以规避，不是每次发动机启机都可以避免，但发动机启机驻车制动保持功能可以识别该工况，并自动开启该功能，避免车辆耸车。
附图说明
图1为本发明一种适用于AT车型的发动机启机驻车制动保持控制方法原理框图；
图2为本发明所述发动机启机驻车制动保持状态机转换流程示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本发明，而非对本发明的限定。
如图1所示，一种适用于AT车型的发动机启机驻车制动保持控制方法，包括以下步骤：
S1.ESC(Electronic Stability Control，车身稳定控制)单元总成同时接收CAN信号、硬线信号及内部传感器信号；
1)所述ESC单元总成接收的CAN信号包括：
变速箱发出的目标挡位信号和倒车挡位信号；
驻车信号；
制动灯开关信号；
发动机管理系统发出的加速踏板信号、发动机状态信号、发动机转速信号、发动机扭矩信号。
2)所述ESC单元总成接收的硬线信号包括：轮速传感器信号。
3)所述ESC单元总成接收的内部传感器信号包括：
主缸压力传感器信号；
纵向加速度信号；
横摆角速度信号。
S2.ESC单元总成判断接收到的信号的有效性，并通过接收的各信号判断HSM(Hold Support for Motor startstop，发动机启机驻车制动保持)工作状态；
所述HSM工作状态包括：待机状态、压力保持状态、功能关闭状态。
1)所述HSM工作状态处于待机状态时，HSM功能不激活；
2)所述HSM工作状态转换到压力保持状态后，HSM功能激活，并保压2s以内；
3)所述HSM工作状态由压力保持状态转换到功能关闭状态后，HSM功能不激活，且制动压力开始泄压。
S3.当ESC单元总成判断HSM工作状态转换为压力保持状态时，则HSM功能启动：ESC单元总成通过CAN线向网关发送HSM当前工作状态信号；计算并存储轮缸压力信号；向BCM(车身控制器)发送制动灯信号，点亮制动灯；
S4.当ESC单元总成判断HSM工作状态转换为功能关闭状态时，则HSM功能关闭。
如图2所示，所述HSM工作状态的转换条件为：
1)由功能关闭状态转换到待机状态的转换条件为：ESC根据轮缸压力模型估算轮缸压力释放完成；
2)由待机状态或功能关闭状态转换到压力保持状态的转换条件为：坡度小于5％，且驾驶员踩制动，且油门开度小于2％，且发动机启停激活，且驻车制动不激活；
3)由压力保持状态转换到功能关闭状态的条件为：车辆驶离；或保压超时 (最大2s)；或驻车制动激活；或整车下电；或发动机熄火。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (9)

  1. 一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，包括以下步骤：
    S1.ESC单元总成同时接收CAN信号、硬线信号及内部传感器信号；
    S2.ESC单元总成判断接收到的信号的有效性，并通过接收的各信号判断HSM工作状态；
    S3.当ESC单元总成判断HSM工作状态转换为压力保持状态时，则HSM功能启动，ESC单元总成通过CAN线向网关发送HSM当前工作状态信号；计算并存储轮缸压力信号；向BCM发送制动灯信号，点亮制动灯；
    S4.当ESC单元总成判断HSM工作状态转换为功能关闭状态时，则HSM功能关闭。
  2. 如权利要求1所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述ESC单元总成接收的CAN信号包括：变速箱发出的目标挡位信号和倒车挡位信号；驻车信号；制动灯开关信号；发动机管理系统发出的加速踏板信号、发动机状态信号、发动机转速信号、发动机扭矩信号。
  3. 如权利要求1所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述ESC单元总成接收的硬线信号包括轮速传感器信号。
  4. 如权利要求1所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述ESC单元总成接收的内部传感器信号包括：主缸压力传感器信号；纵向加速度信号；横摆角速度信号。
  5. 如权利要求1所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述HSM工作状态包括：待机状态、压力保持状态、功能关闭状态。
  6. 如权利要求5所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述HSM工作状态处于待机状态时，HSM功能不激活；
    所述HSM工作状态转换到压力保持状态后，HSM功能激活，并保压一段时间；
    所述HSM工作状态由压力保持状态转换到功能关闭状态后，HSM功能不 激活，且制动压力开始泄压。
  7. 如权利要求6所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述HSM工作状态转换到压力保持状态后，HSM功能激活，保压时间为2S。
  8. 如权利要求6所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述HSM工作状态的转换条件为：
    1)由功能关闭状态转换到待机状态的转换条件为：ESC根据轮缸压力模型估算轮缸压力释放完成；
    2)由待机状态或功能关闭状态转换到压力保持状态的转换条件为：坡度小于5％，且驾驶员踩制动，且油门开度小于2％，且发动机启停激活，且驻车制动不激活；
    3)由压力保持状态转换到功能关闭状态的条件为：车辆驶离；或保压超时；或驻车制动激活；或整车下电；或发动机熄火。
  9. 如权利要求6所述的一种适用于AT车型的发动机启机驻车制动保持控制方法，其特征在于，所述HSM工作状态由压力保持状态转换到功能关闭状态的条件中，保压超时指保压时间超过2S。
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