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
汽車離合器總泵
1 范圍
本文件界定了汽車離合器總泵(以下簡稱“總泵”)的術語和定義，規定了總泵的技術要求和試驗方法。
本文件適用于汽車離合器總泵。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引 用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。
GB/T 10125 人造氣氛腐蝕試驗 鹽霧試驗
GB 12981 機動車輛制動液
GB/T41481 道路車輛 零部件和系統的清潔度
QC/T307 汽車用真空助力器性能要求及臺架試驗方法
QC/T1125 汽車離合器系統術語及定義
3 術語和定義
下列術語和定義適用于本文件。
3.1
最大行程 maximum stroke
活塞從初始位置運動到極限位置之間的距離。
3.2
初始建壓行程 initial pressure-building travel
活塞從初始位置運動到液壓腔產生0.1MPa 壓力時位置的距離。
3.3
空行程 ideal stroke
活塞從初始位置至總泵儲液腔與液壓腔之間通道(如中心閥門或補償孔)開始關閉位置所移動的距離。
3.4
初始助力點 the point of initial assistant force
帶助力總泵的輸入-輸出特性曲線中，不同氣源壓力下特性線的下折點。
3.5
最大助力點 the point of maximal assistant force
帶助力總泵的輸入-輸出特性曲線中，不同氣源壓力下特性線的上折點。
4 產品分類
按總泵結構形式，分為三類： A 類、B 類和C 類。A 類為液壓總泵見圖1,B 類為氣助力總泵見 圖 2 ,C 類為真空助力總泵見圖3。
