首页> 外国专利> Pneumatic servo-motor for automobile braking assistance has unidirectional clutch which can block an actuating rod with respect to a moving piston so that the rod transmits a reaction force to the piston independently of other moving parts

Pneumatic servo-motor for automobile braking assistance has unidirectional clutch which can block an actuating rod with respect to a moving piston so that the rod transmits a reaction force to the piston independently of other moving parts

机译：用于汽车制动辅助的气动伺服马达具有单向离合器，该单向离合器可以将致动杆相对于运动的活塞锁定，从而使该杆独立于其他运动部件将反作用力传递给活塞

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摘要

The servo-motor has a unidirectional clutch (58) which, when an input force is applied at a set speed, occupies an active position in which it blocks an actuating rod (28), with respect to a moving piston (22), in a front extreme axial position. In this extreme position the rod transmits a reaction force to the piston independently of a reaction disk (32), of a plunger position (48) and of the position of a control rod (38). Servo-motor has a rigid envelope with movable transversal shutter forming a sealed front chamber acted on by a first engine depression pressure (P1) varying between engine depression and atmospheric pressure (Pa). The servo-motor has a mobile piston (22), fixed to the shutter, which acts on a rear end of the actuating rod (28) of a brake master cylinder. Cylinder is mounted so as to slide with respect to piston against a first reset spring (24) fitted in the front chamber. The servo-motor has a control rod (38) which selectively moves in the piston as a function of the axial input force applied towards the front against a reset force exerted on the rod by a second reset spring (40). The rod also moves to an intermediate actuating position or an extreme actuating position produced when an input force is applied at a high set speed level. Servo-motor has a plunger (46) arranged at the front of the control rod in the piston and a three way valve (50) which includes an annular seat (48) to the rear of the plunger and which varies the second pressure (P2) in the rear chamber (18), by putting into communication the front chamber and the rear chamber when the control rod is in the rest position or progressively putting the rear chamber in communication with atmospheric pressure when the control rod is actuated. In the extreme actuating position of the control rod a front end of the plunger forming a sensor (52) acts on a reaction disk (32) fixed to the rear of the actuating rod so as to transmit to the plunger and to the control rod the reaction force of the actuating rod (28).

机译：伺服电动机具有单向离合器（58），当以设定速度施加输入力时，该伺服电动机占据一个主动位置，在该主动位置中，它相对于运动的活塞（22）阻塞致动杆（28）。前极轴向位置。在该极限位置，杆独立于反作用盘（32），柱塞位置（48）和控制杆（38）的位置将反作用力传递到活塞。伺服电机具有刚性外壳，外壳带有可移动的横向百叶窗，该横向百叶窗形成了密封的前室，该前室受到在发动机低压和大气压力（Pa）之间变化的第一发动机低压（P1）作用。伺服电动机具有固定在闸板上的活动活塞（22），该活动活塞作用在制动主缸的致动杆（28）的后端。气缸安装成可相对于活塞在安装在前腔中的第一复位弹簧（24）上滑动。伺服马达具有控制杆（38），该控制杆根据第二复位弹簧（40）施加在杆上的复位力，朝着前方施加的轴向输入力选择性地在活塞中移动。当以高设定速度水平施加输入力时，杆还移动到中间致动位置或极端致动位置。伺服电动机具有一个布置在活塞中控制杆前部的柱塞（46）和一个三通阀（50），该三通阀包括一个位于柱塞后部的环形座（48），并改变第二压力（P2 ）在后腔室（18）中，通过在控制杆处于静止位置时使前腔室与后腔室连通，或在致动控制杆时使后腔室与大气压力逐渐连通。在控制杆的极限操作位置，形成传感器（52）的柱塞的前端作用在固定在操作杆后部的反作用盘（32）上，从而传递到柱塞和控制杆。操纵杆（28）的反作用力。

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公开/公告号FR2809066A1

专利类型
公开/公告日2001-11-23

原文格式PDF
申请/专利权人 BOSCH SISTEMAS DE FRENADO S.L.;
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申请/专利号FR20000006600
发明设计人 SIMON BACARDIT JUAN;
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申请日2000-05-22
分类号B60T13/569;
国家 FR
入库时间 2022-08-22 00:24:29

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