CN104340194B - 电控式制动系统的泵单元 - Google Patents

电控式制动系统的泵单元 Download PDF

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CN104340194B
CN104340194B CN201410344687.0A CN201410344687A CN104340194B CN 104340194 B CN104340194 B CN 104340194B CN 201410344687 A CN201410344687 A CN 201410344687A CN 104340194 B CN104340194 B CN 104340194B
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piston pump
pump
piston
pressure
brake system
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CN104340194A (zh
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柳栋耀
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HL Mando Corp
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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
    • 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
    • B60T13/14—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 using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/145—Master cylinder integrated or hydraulically coupled with booster
    • B60T13/146—Part of the system directly actuated by booster pressure
    • 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
    • B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
    • B60T10/04—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrostatic brake
    • 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
    • B60T13/14—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 using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/143—Master cylinder mechanically coupled with booster
    • 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
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • 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
    • 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
    • B60T8/4031—Pump units characterised by their construction or mounting
    • 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
    • B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0413—Cams
    • F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulating Braking Force (AREA)
  • Reciprocating Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

本发明公开一种电控式制动系统的泵单元。根据本发明的一实施例，可提供一种设置于在调制器模块形成的腔体内的电控式制动系统的泵单元，其包括：一个马达，具有旋转轴；支座，中心设置于所述旋转轴，且具备以所述中心为基准向两侧隔开一定间隔配置成一排的连接轴；加压部件，设置于所述各连接轴；以及第1活塞泵及第2活塞泵，具备通过所述支座的旋转而与加压部件的外周面接触并往复移动的活塞，且彼此配置成一排。

Description

电控式制动系统的泵单元
技术领域
本发明涉及一种电控式制动系统的泵单元，更详细而言，涉及一种能够通过改进使活塞泵工作的结构来减少活塞泵工作时所产生的振动及噪音的电控式制动系统的泵单元。
背景技术
通常，电控式制动系统用于通过有效防止车辆打滑现象而获得强大且稳定的制动力，作为这种电控式制动系统，已经开发出了防止制动时车轮滑行的防抱死制动系统(ABS：Anti-Lock Brake System)，防止车辆突然启动或突然加速时驱动轮打滑的制动牵引力控制系统(BTCS：Brake Traction Control System)，将防抱死制动系统与制动牵引力控制系统相组合以控制制动液压而稳定地维持车辆行驶状态的车辆动态控制系统(VDC：Vehicle Dynamic Control System)等。
这种电控式制动系统包括用于控制传递到在车轮上安装的液压制动器侧的制动液压的多个电磁阀，用于临时储存从液压制动器排放的油的低压蓄油器，用于强制泵送低压蓄油器的油的马达及活塞泵，以及用于控制电磁阀和马达的驱动的ECU，这些构成要件紧凑地内置于铝制调制器模块内。
因此，所述电控式制动系统中，低压蓄油器的油通过活塞泵的工作而被加压并泵送，该加压的油传递到液压制动器或主缸组件侧，同时进行车轮的电控。此时，通过马达驱动的活塞泵通常使用以一个马达上结合两个活塞泵的双泵(dual pump)类型，公开专利公报第10-2009-0043124号公开了用于这种电控式制动系统的活塞泵。参照所公开的公开文献，作为活塞泵，设置以马达的旋转轴为基准具有180度的相位差的一对活塞泵，在马达的旋转轴设置偏心部件，一对活塞泵的活塞随着偏心部件的偏心旋转而往复移动，从而吸入并吐出活塞泵内的油。
另一方面，使用如下结构：马达的旋转轴由偏心轴构成，设置于偏心轴的偏心部件用作同心轴承。
如上所述，当通过一个马达工作的活塞泵的活塞往复移动时，例如存在活塞从下止点向上止点移动时在活塞所移动的直线方向上产生反作用力而产生振动及噪音的问题。即，一对活塞泵交替地通过活塞在马达的旋转轴方向上产生反作用力，因此会产生振动及噪音。在此，下止点是指活塞沿马达的旋转轴方向移动而油流入到活塞泵内的吸入工序状态，是活塞的移动受限制的最低位置，上止点是指活塞沿远离马达的旋转轴的方向移动而吐出活塞泵内的油的吐出工序状态，是活塞的移动受限制的最高位置。
另外，存在如下问题：通过马达产生的旋转力因偏心部件或偏心轴而偏心旋转，随之，在结构特性上重量平衡(weight balance)失衡，偏心旋转时产生振动及噪音。
专利文献1：KR公开专利公报第10-2009-0043124号(株式会社万都)
发明内容
(一)本发明要解决的技术问题
本发明是为了解决如上问题而提出的，其目的在于提供一种电控式制动系统的泵单元，其将至少一对活塞泵设置成一排，通过将使活塞泵进行泵送的加压部件与活塞对置配置而抵消由活塞产生的反作用力，从而能够减少振动及噪音。
本发明的另一目的在于提供一种电控式制动系统的泵单元，其防止使活塞泵的活塞进行泵送的加压部件的重量中心从马达的旋转轴中心偏心，由此不仅能够确保重量平衡，而且还能够防止产生由以往的偏心旋转引起的振动及噪音。
(二)技术方案
为了实现上述目的，根据本发明的一实施例，可提供一种电控式制动系统的泵单元，设置于在调制器模块形成的腔体(bore)内，其包括：一个马达，具有旋转轴；支座，中心设置于所述旋转轴，且具备以所述中心为基准向两侧隔开一定间隔配置成一排的连接轴；加压部件，设置于所述各连接轴；及第1活塞泵及第2活塞泵，具备通过所述支座的旋转而与加压部件的外周面接触并往复移动的活塞，且彼此配置成一排。
另外，所述加压部件可由可旋转地设置于所述连接轴的轴承或滚柱构成。
另外，还可以具备第3活塞泵及第4活塞泵，该第3活塞泵及第4活塞泵具备通过所述支座的旋转而与加压部件的外周面接触并往复移动的活塞，且与所述第1活塞泵及第2活塞泵隔开一定间隔彼此配置成一排。
另外，所述第1活塞泵及第2活塞泵和所述第3活塞泵及第4活塞泵可配置成以所述支座为中心彼此成90度的角度，所述第1活塞泵及第2活塞泵和所述第3活塞泵及第4活塞泵随着所述支座的旋转而依次发挥泵送作用。
另外，与所述加压部件接触的各活塞的边缘可构成为具有圆角形状
(三)有益效果
根据本发明，本发明的电控式制动系统的泵单元中，将通过一个马达工作的一对活塞泵设置成一排，通过将对该一对活塞泵进行加压的加压部件与各活塞泵对置配置而抵消由活塞产生的反作用力，从而具有能够减少振动及噪音的效果。
另外，防止由马达的旋转产生的旋转力偏心旋转，并防止对活塞泵进行加压的加压部件从马达的旋转轴的中心偏心，由此具有不仅能够确保重量平衡，而且还能够防止产生由以往的偏心旋转引起的振动及噪音。
附图说明
根据以下附图，对本发明进行具体说明，但这些附图仅仅示出本发明的优选实施例，因此不应将本发明的技术思想限定解释为这些附图。
图1是本发明的优选的一实施例的电控式制动系统的液压系统图。
图2是表示图1中设置的泵单元的配置结构的示意图。
图3及图4分别是表示本发明的优选的一实施例的电控式制动系统的泵单元进行动作的状态的图。
附图标记说明
100：泵单元 110：马达
112：旋转轴 120：支座
123：连接轴 130：加压部件
140、150、160、170：活塞泵
143、153、163、173：活塞
具体实施方式
以下，将参照附图详述本发明的优选实施例。
图1是本发明的电控式制动系统的液压系统图。
如图1所示，适用本发明的电控式制动系统具备：制动踏板10，接收驾驶员的操作力；制动助力器11，根据该制动踏板10的踏板力，利用真空压与大气压之间的压力差使踏板力倍增；主缸20，通过该制动助力器11产生压力；第1液压回路40A，将该主缸20的第1端口21和两个车轮制动器(或车轮缸)30连接来控制油压传递；及第2液压回路40B，将主缸20的第2端口22和剩下的两个车轮制动器30连接来控制油压传递。
第1液压回路40A及第2液压回路40B分别包括：电磁阀41、42，用于控制向各两个车轮制动器30侧传递的制动液压；低压蓄油器43，临时储存减压制动工作时从车轮制动器30侧排放的油；泵单元100，具备用于泵送增压/维持制动工作时储存在低压蓄油器43中的油的一个马达110和多个活塞泵140、150、160、170；节流孔46，用于从通过泵单元100的泵送动作吐出的高压油压降低压力脉动；辅助流路48a，在牵引力控制系统模式时引导主缸20的油吸入到泵单元100的入口。这些第1液压回路40A及第2液压回路40B的构成要件紧凑地内置于调制器模块(未图示)中。
多个电磁阀41、42与车轮制动器30的上游侧及下游侧连接，其分为：配置于各车轮制动器30的上游侧，平时维持开放状态的常开式电磁阀41；及配置于各车轮制动器30的下游侧，平时维持关闭状态的常闭式电磁阀42。这些电磁阀41、42的开闭动作通过配置于各车轮侧的车轮速度传感器检测车辆速度的电控单元(ECU；未图示)来控制，常闭式电磁阀42随着减压制动而被开放，从车轮制动器30侧排放的油临时储存在低压蓄油器43中。
并且，基于本发明的泵单元100通过马达110的驱动而被驱动，从而吸入储存在低压蓄油器43中的油并向节流孔46侧吐出，由此将液压传递到车轮制动器30侧或主缸20侧。
另一方面，在将主缸20和活塞泵140、150、160、170的出口连接的主流路47a上设置用于控制牵引力的常开式电磁阀47(以下称为TC阀)。该TC阀47平时维持开放状态，在通过制动踏板10进行一般制动时，将在主缸20中形成的制动油压通过主流路47传递到车轮制动器30侧。
另外，辅助流路48a从主流路47a分支，引导主缸20的油吸入到活塞泵44的入口侧，此处设有使油仅流向活塞泵44的入口的换向阀48。电动换向阀48设置于辅助流路48a的中途，平时关闭，在牵引力控制系统模式时开放，进行工作。
并且，在制动助力器11上设置检测制动助力器11的真空压及大气压的压力传感器50，在前轮左右侧车轮FL、FR和后轮左右侧车轮RL、RR上设置检测所施加的实际制动压力的车轮压力传感器51。该压力传感器50、51电连接于电控单元而被控制。
下面，参照图2，对本发明的一实施例的泵单元的结构进行说明。
参照图2，泵单元100具备：一个马达，具有旋转轴112；支座120，设置于马达110的旋转轴112；加压部件130，设置于所述支座120；及多个活塞泵140、150、160、170，为了通过所述加压部件130进行泵送工作而以马达110为中心沿半径方向配置。
马达110以使旋转轴112位于调制器模块(未图示)内的方式设置于调制器模块的外侧，产生用于驱动活塞泵140、150、160、170的旋转力。在该马达110的旋转轴112上设置支座120的中心，以使支座120具有与旋转轴112相同的中心轴。
支座120具备以中心为基准向两侧隔开一定间隔配置成一排的连接轴123。在该连接轴123上分别设置加压部件130。
加压部件130与后述的活塞泵140、150、160、170接触，并可旋转地设置于连接轴123，以便在对活塞泵140、150、160、170的活塞143、153、163、173进行加压时使摩擦力最小化。而且，加压部件130可由轴承或滚柱构成。这种加压部件130以支座120的中心为基准隔开一定间隔配置于两侧，通过支座120的中心设置于旋转轴112，重量中心不会偏向一侧，重量平衡变得均匀。即，能够解决由以往的偏心旋转引起的振动及噪音的问题。
多个活塞泵140、150、160、170沿着半径方向隔开一定间隔配置于支座120的外周面。例如，如图2所示，第1活塞泵140和第2活塞泵150分别配置于支座120的左侧及右侧且彼此成一排，第3活塞泵160和第4活塞泵170分别配置于支座120的上侧及下侧，且彼此成一排。即，第1～第4活塞泵140、150、160、170以90度的间隔配置于支座120的外周面周围。从而，随着支座120的旋转，第1活塞泵140及第2活塞泵150和所述第3活塞泵160及第4活塞泵170通过加压部件130依次发挥泵送作用。
另一方面，第1～第4活塞泵140、150、160、170的内部结构均相同，因此以第1活塞泵140为基准进行说明。
第1活塞泵140构成为包括：活塞143，在内部形成有吸入流路(未图示)；进口阀141，根据该活塞143的位置来开闭吸入流路(未图示)的出口侧；及出口阀145，与进口阀141相反地动作。而且，如上构成的活塞泵140、150、160、170连接于形成在调制器模块上的吸入端口(未图示)和吐出端口(未图示)，从吸入端口吸入油并进行压缩之后向吐出端口吐出。
下面，参照图2至图4对具有如上结构的泵单元的动作进行说明。
参照图2，支座120随着马达110的驱动而旋转，设置于支座120的加压部件130与第1活塞泵140及第2活塞泵150配置成一排。即，随着支座120的旋转，加压部件130对第1活塞泵140及第2活塞泵150的活塞143、153进行加压而进行吐出工序。由此，从活塞143、153产生的反作用力通过配置成一直线的加压部件130传递到支座120的中心，由此抵消两侧的反作用力。
另外，如图3所示，若支座120旋转而使加压部件130远离第1活塞泵140及第2活塞泵150，则活塞143、153返回到原位置并进行吸入工序，如图4所示，随着支座120的进一步的旋转，加压部件130对与第1活塞泵140及第2活塞泵150具有90度的相位差的第3活塞泵160及第4活塞泵170进行加压时，加压部件130与第3活塞泵160及第4活塞泵170的活塞163、173接触，从而对活塞163、173进行加压。即，与第1活塞泵140及第2活塞泵150同样地，由第3活塞泵160及第4活塞泵170的活塞163、173产生的反作用力相互抵消，可以减少振动及噪音。
如上所述，当支座120旋转而加压部件130进行旋转并对各活塞143、153、163、173加压时，加压部件130在支座120的连接轴123上旋转并对活塞143、153、163、173进行加压。即，随着加压部件130旋转并对活塞143、153、163、173进行加压，使得与活塞143、153、163、173的摩擦力最小化并进行加压。
另一方面，优选各活塞143、153、163、173的末端边缘具有圆角形状，以便在与加压部件130触碰时将冲击及摩擦最小化。
如此，支座120旋转，加压部件130使第1活塞泵140及第2活塞泵150和所述第3活塞泵160及第4活塞泵170依次发挥泵送作用，从彼此配置成一排的第1活塞泵140及第2活塞泵150和所述第3活塞泵160及第4活塞泵170的活塞143、153、163、173产生的反作用力相互抵消，从而能够减少振动及噪音。
关于上述的泵单元100的结构，图示说明了具备在与马达110结合的支座120上排列成一排的一对加压部件130，且配置彼此具有90度相位差的4个活塞泵140、150、160、170来进行泵送，但并不限定于此，只要是加压部件130和至少一对活塞泵排列成一排，则可选择性增减加压部件130及活塞泵的数量。
如上所述，虽然根据有限的实施例和附图对本发明进行了说明，但本发明并不限定于此，本发明所属技术领域的普通技术人员可以在本发明的技术思想及所记载的权利要求书的等价范围内进行各种修改及变形。

Claims (5)

1.一种电控式制动系统的泵单元，设置于在调制器模块形成的腔体内，其特征在于，包括：
一个马达，具有旋转轴；
支座，中心设置于所述旋转轴，且具备以所述中心为基准向两侧隔开一定间隔配置成一排的连接轴；
加压部件，设置于各所述连接轴；以及
第1活塞泵及第2活塞泵，具备通过所述支座的旋转而与加压部件的外周面接触并往复移动的活塞，且彼此配置成一排。
2.根据权利要求1所述的电控式制动系统的泵单元，其特征在于，所述加压部件为可旋转地设置于所述连接轴的轴承或滚柱。
3.根据权利要求1所述的电控式制动系统的泵单元，其特征在于，所述电控式制动系统的泵单元还具备第3活塞泵及第4活塞泵，所述第3活塞泵及第4活塞泵具备通过所述支座的旋转而与加压部件的外周面接触并往复移动的活塞，且与所述第1活塞泵及第2活塞泵隔开一定间隔彼此配置成一排。
4.根据权利要求3所述的电控式制动系统的泵单元，其特征在于，所述第1活塞泵及第2活塞泵和所述第3活塞泵及第4活塞泵配置成以所述支座为中心彼此成90度的角度，所述第1活塞泵及第2活塞泵和所述第3活塞泵及第4活塞泵随着所述支座的旋转而依次发挥泵送作用。
5.根据权利要求3所述的电控式制动系统的泵单元，其特征在于，与所述加压部件接触的各活塞的边缘构成为具有圆角形状。
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