CN108860100B - 用于制动***的致动单元 - Google Patents

用于制动***的致动单元 Download PDF

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CN108860100B
CN108860100B CN201810461017.5A CN201810461017A CN108860100B CN 108860100 B CN108860100 B CN 108860100B CN 201810461017 A CN201810461017 A CN 201810461017A CN 108860100 B CN108860100 B CN 108860100B
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position sensor
electronic memory
hydraulic
brake system
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H·费格尔
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HL Mando Corp
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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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/06—Disposition of 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
    • 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
    • B60T13/10—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 fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake 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
    • 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
    • B60T13/10—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 fluid assistance, drive, or release
    • B60T13/12—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 fluid assistance, drive, or release the fluid being liquid
    • 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
    • B60T13/10—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 fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake 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
    • 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
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • 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
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/10—ABS control 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/30—ESP control system
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/82—Brake-by-Wire, EHB
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/38—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including valve means of the relay or driver controlled type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/301—Sensors for position or displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Elements And Transmission Devices (AREA)

Abstract

本发明提供一种用于制动***的致动单元。用于制动***的该致动单元包括：直接或者间接连接至制动踏板的活塞；电子控制单元；液压单元；电子存储器单元，该电子存储器单元机械地连接至所述液压单元；以及位置传感器，该位置传感器构造成检测连接至所述制动踏板的所述活塞的移动，其中，所述位置传感器的信号被校正，并且用于校正所述信号的数据存储在所述电子存储器单元中。

Description

用于制动***的致动单元
技术领域
本发明涉及用于制动***的致动单元。
背景技术
通常，车辆中安装有用于制动的制动***，并且近来已经提出了这样一种***，该***电子地控制制动液压朝安装在车轮中的轮缸传递以获得更强大并且稳定的制动力。
作为电子制动***的实施例有防抱死制动***(ABS)、制动牵引力控制***(BTCS)、电子稳定控制(ESC)***等。
此类电子制动***是这样的***，在该***中，当驾驶员下压踏板时，电子控制单元(ECU)检测此下压操作并且通过操作液压发生器产生液压以进行制动动作。
即，当驾驶员下压制动踏板时，踏板位移传感器检测制动踏板的位移以操作液压发生器，并因此进行制动动作。
同时，电动液压制动器(一类液压制动器)是这样的制动***，在该制动***中，当驾驶员下压踏板时，控制器检测下压操作并将液压供应至主缸以向各个车轮的轮缸(未示出)传递制动液压，并因而产生制动力。
虽然构造并使用这样的电动液压制动器使得控制简单，但是需要这样的先进电动液压制动器，其中保证车辆的安全，提高燃料效率，并且制动过程中用户所需的踏板感受合意。
因此，根据以上需求研发电动液压制动器的研究已经取得了进展，在该电动液压制动器中，电动液压制动器的构造简单，即使发生故障时也可以容易地产生制动力，并且也容易控制。
发明内容
本发明涉及提供这样一种用于制动***的致动单元，该致动单元能够通过减少气缸的内部压力的不需要的检测而减少计算负荷的量，能够提高压力控制性能，并且能够提供与传统机械制动***相同的制动感觉。
根据本发明的一方面，提供一种用于制动***的致动单元，该致动单元包括电子控制单元、液压单元以及直接或者间接连接至制动踏板的活塞，并且所述致动单元包括：电子存储器单元，该电子存储器单元机械地连接至所述液压单元；以及位置传感器，该位置传感器构造成检测连接至所述制动踏板的所述活塞或者另一零件的移动，其中，所述位置传感器的信号被校正，并且用于校正所述信号的数据存储在所述电子存储器单元中。
所述电子存储器单元可以整合有压力传感器。
可以利用参考位置传感器产生所述校正数据，并且所述校正数据可以存储在所述电子控制单元以及所述电子存储器单元中。
在更换所述电子控制单元的情况下，代用电子控制单元可以从所述电子存储器单元读取所述校正数据。
所述位置传感器可以检测磁场中的变化；并且编码器可以包括构造成随所述活塞移动而移动的永磁体。
所述位置传感器可以检测三维磁场并且消除外部扰动磁场对所述编码器的移动轴线的影响。
所述位置传感器与所述电子存储器单元可以经由弹簧连接至所述电子控制单元。
所述位置传感器可以由胶固定。
附图说明
对于本领域中的普通技术人员而言，通过参照附图详细描述本发明的示例性实施方式，本发明的以上以及其他目的、特征以及优势将变得更显而易见，在附图中：
图1是示出根据本发明的一个实施方式的用于制动***的致动单元的示意图；以及
图2是在示出根据本发明的一个实施方式的用于制动***的致动单元的位置传感器的信号被校正前后的信号的图表。
具体实施方式
下文中，将参照附图详细描述本领域技术人员容易实施的实施方式。然而，可以以许多不同形式实施本发明的实施方式，并因此本发明的实施方式不限于本文中描述的实施方式。图中省略了与描述无关的部分以便清楚说明本发明的实施方式。在整个说明书中相同附图标记表示相似部件。
在本说明书中，应理解，诸如“包括”、“具有”以及“包含”之类的术语意图表明说明书中公开的特征、数量、步骤、动作、部件、零件或者其组合的存在，但是不意图排除可能存在或者增添一个或者更多个其他特征、数量、步骤、动作、部件、零件或者其组合。
图1是示出根据本发明的一个实施方式的用于制动***的致动单元的示意图，并且图2是在示出根据本发明的一个实施方式的用于制动***的致动单元的位置传感器的信号被校正前后的信号的图表。
参照图1，根据本发明的一个实施方式的用于制动***的致动单元1包括活塞10、液压单元20、电子控制单元(ECU)30、电子存储器单元32以及位置传感器34。
在根据本发明的一个实施方式的用于制动***的致动单元1中，当驾驶员下压踏板时，ECU30可以检测下压操作并且将制动液压传递至各个车轮的轮缸(未示出)以产生制动力。
参照图1，在本发明的一个实施方式中，活塞10可以形成为借助制动踏板(未示出)的下压力可滑动地前后移动。这里，可在室(未示出)中安装弹簧(未示出)，使得当移除下压力时，活塞10返回至其初始位置。
此外，在本发明的一个实施方式中，输入杆12可以连接至活塞10的一个端部。这里，在本发明的一个实施方式中，输入杆12可以连接至踏板，使得输入杆12可以根据驾驶员的操作前后移动。
参照图1，能够测量制动踏板的位移的编码器14可以安装在活塞10的另一端部。这里，在本发明的一个实施方式中，编码器14可以包含构造成随活塞10移动而移动的永磁体16。
同时，在本发明的一个实施方式中，液压单元20可以产生与由驾驶员施加的下压力成比例的液压。这里，ECU 30可以调节液压单元20的液压。
参照图1，根据本发明的一个实施方式的用于制动***的致动单元1可以当驾驶员下压踏板时将关于踏板压力的信息传递至ECU 30。
在本发明的一个实施方式中，当驾驶员下压踏板时，ECU 30可以借助诸如由被驾驶员下压的制动踏板产生并被位置传感器34测量的压力之类的信息检测驾驶员所需的制动量。
这里，ECU 30可以操作用于产生制动液压的液压单元20。同时，在本发明的一个实施方式中，马达(未示出)可以连接至ECU 30，并且这里，马达可以是无刷交流(BLAC)马达，该无刷交流马达是三相交流马达。
参照图1，在本发明的一个实施方式中，ECU 30可以控制位于液压单元20的一侧并且构造成利用电信号阻塞或者允许流体流动的阀体(未示出)，以进行防抱死制动***(ABS)、电子稳定控制(ESC)等的功能。
此外，在本发明的一个实施方式中，ECU 30可以包括电子存储器单元32、位置传感器34以及代用ECU 38。这里，位置传感器34可以检测磁场中的三维变化并且可以连接至ECU30。
参照图2，在本发明的一个实施方式中，位置传感器34可以具有未被校正的信号d1。这里，位置传感器34可以由胶固定。此外，位置传感器34可以消除外部扰动磁场对编码器14的移动轴线的的影响。
同时，在本发明的一个实施方式中，电子存储器单元32可以机械地连接至液压单元20。这里，电子存储器单元32可以整合有压力传感器。这里，在本发明的一个实施方式中，位置传感器34与电子存储器单元32可以经由弹簧(未示出)连接至ECU 30。
参照图1，可以利用参考位置传感器34产生校正数据d2。产生的校正数据d2可以存储在ECU 30以及电子存储器单元32中。
同时，在本发明的一个实施方式中，在更换电子控制单元ECU 30的情况下，代用ECU 38可以从电子存储器单元32读取校正数据。
这里，根据本发明的一个实施方式的用于制动***的致动单元1可以利用校正数据d2校正由位置传感器34检测的信号d1，以将校正的信号d3传递至ECU 30。
因此，在本发明的一个实施方式中，用于制动***的致动单元1可以基于踏板压力向踏板提供下压力，并且利用校正数据校正由位置传感器检测的信号以减少驾驶过程中驾驶员的差异感。
此外，因为根据本发明的一个实施方式的用于制动***的致动单元1通过校正位置传感器34的信号而校正活塞的位置，所以可以提高控制性能以及稳定性。
如以上描述的，因为根据本发明的一个实施方式的用于制动***的致动单元校正位置传感器的信号以校正活塞的位置，所以能够提高控制性能以及稳定性。
同时，因为根据本发明的一个实施方式的用于制动***的致动单元基于驾驶员的踏板压力向踏板提供下压力并且利用校正数据校正由位置传感器产生的信号，所以能够减少驾驶过程中用户的差异感。
虽然已经描述了本发明的实施方式，但是本发明的实质不限于本说明书中公开的实施方式，理解本发明的实质的那些人员可以通过部件的添加、变型、删除、增补等容易提出在相同实质内的其他实施方式，并且这些其他实施方式也将落入本发明的实质内。
相关申请的交叉援引
本申请要求2017年5月16日递交的申请号为10-2017-0060352的韩国专利申请的优先权以及权益，通过援引将该申请的全部公开内容结合于此。

Claims (8)

1.一种用于制动***的致动单元，该致动单元包括电子控制单元、液压单元以及直接或者间接连接至制动踏板的活塞，所述致动单元包括：
电子存储器单元，该电子存储器单元机械地连接并固定至所述液压单元；以及
位置传感器，该位置传感器构造成检测连接至所述制动踏板的所述活塞的移动，
其中，所述位置传感器的信号被校正，并且用于校正所述信号的数据存储在所述电子存储器单元中，并且
其中，所述液压单元构造成响应于所述制动踏板的移动产生液压。
2.根据权利要求1所述的致动单元，其中，所述电子存储器单元整合有压力传感器。
3.根据权利要求1所述的致动单元，其中，利用参考位置传感器产生校正数据，并且所述校正数据存储在所述电子控制单元以及所述电子存储器单元中。
4.根据权利要求1所述的致动单元，其中，在更换所述电子控制单元的情况下，代用电子控制单元从所述电子存储器单元读取校正数据。
5.根据权利要求4所述的致动单元，其中，
所述位置传感器检测磁场中的变化；并且
编码器包括构造成随所述活塞移动而移动的永磁体。
6.根据权利要求5所述的致动单元，其中，所述位置传感器检测三维磁场并且消除外部扰动磁场对所述编码器的移动轴线的影响。
7.根据权利要求1所述的致动单元，其中，所述位置传感器与所述电子存储器单元经由弹簧连接至所述电子控制单元。
8.根据权利要求5所述的致动单元，其中，所述位置传感器由胶固定。
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