Clutch master cylinder of automobile
1 Scope
This document specifies the terms and definitions, technical requirements, and test methods of clutch master cylinder of automobile (hereinafter referred to as the "master cylinder").
This document is applicable to the clutch master cylinder of automobile.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
GB 12981 Motor vehicle brake fluids
GB/T 41481 Road vehicles - Cleanliness of components and systems
QC/T 307 Performance requirements and bench test methods of vacuum booster for automobile
QC/T 1125 Automotive clutch terminology and definition
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
maximum stroke
distance that the piston moves from its initial position to its limit position
3.2
initial pressure-building travel
distance that the piston moves from its initial position to the position where the pressure of hydraulic chamber is 0.1MPa
3.3
ideal stroke
distance that the piston moves from its initial position to the position where the channel (such as the center valve or compensating hole) between the storage chamber and the hydraulic chamber of the master cylinder begins to close
3.4
the point of initial assistant force
downward turning point of the characteristic line under different air source pressures in the input-output characteristic curve of a master cylinder with assistance force
3.5
the point of maximal assistant force
upward turning point of the characteristic line under different air source pressures in the input-output characteristic curve of a master cylinder with assistance force
4 Product classification
Master cylinders are classified into three types by structural forms: Classes A, B and C. Class A is hydraulic master cylinder, as shown in Figure 1; Class B is air-assistant master cylinder, as shown in Figure 2; Class C is vacuum-assistant master cylinder, as shown in Figure 3.
Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
6 Test methods
汽车离合器总泵
1 范围
本文件界定了汽车离合器总泵(以下简称“总泵”)的术语和定义，规定了总泵的技术要求和试验方法。
本文件适用于汽车离合器总泵。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引 用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB/T 10125 人造气氛腐蚀试验 盐雾试验
GB 12981 机动车辆制动液
GB/T41481 道路车辆 零部件和系统的清洁度
QC/T307 汽车用真空助力器性能要求及台架试验方法
QC/T1125 汽车离合器系统术语及定义
3 术语和定义
下列术语和定义适用于本文件。
3.1
最大行程 maximum stroke
活塞从初始位置运动到极限位置之间的距离。
3.2
初始建压行程 initial pressure-building travel
活塞从初始位置运动到液压腔产生0.1MPa 压力时位置的距离。
3.3
空行程 ideal stroke
活塞从初始位置至总泵储液腔与液压腔之间通道(如中心阀门或补偿孔)开始关闭位置所移动的距离。
3.4
初始助力点 the point of initial assistant force
带助力总泵的输入-输出特性曲线中，不同气源压力下特性线的下折点。
3.5
最大助力点 the point of maximal assistant force
带助力总泵的输入-输出特性曲线中，不同气源压力下特性线的上折点。
4 产品分类
按总泵结构形式，分为三类： A 类、B 类和C 类。A 类为液压总泵见图1,B 类为气助力总泵见 图 2 ,C 类为真空助力总泵见图3。
