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QC/T 1011-2023Clutch master cylinders for automobiles (English PDF)

汽车离合器总泵

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

April 21, 2023

Implementation date

November 1, 2023

Scope

QC/T 1011-2023 is the English-translated version of 汽车离合器总泵.

QC/T 1011-2023 is the Chinese standard "Clutch master cylinders for automobiles". Its scope clause reads: 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. Its clauses include terms and definitions; product classification.

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Document preview — QC/T 1011-2023

National Standard of the People's Republic of China

Replacing: QC/T 1011-2015

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Contents
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification
5 Technical requirements
6 Test methods

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.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

Similar standards

QC/T 1190-2023|QC/T 1010-2023|GB/T 5764-2023

Editions of QC/T 1011

Edition	Title	Revision	Status
QC/T 1011-2023	Clutch master cylinders for automobiles	current edition	Current
QC/T 1011-2015	Clutch master cylinders for automobiles	previous edition	Superseded

This page sells the current edition, QC/T 1011-2023. Earlier editions are listed for reference only.

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