QC/T 311-2026Performance requirements and bench test methods of vacuum booster with brake master cylinder for motor vehicle (English PDF)

QC/T 311-2026 is the English-translated version of 汽车用真空助力器带制动主缸总成性能要求及台架试验方法.

QC/T 311-2026 specifies the performance requirements and bench test methods for the vacuum booster with brake master cylinder assembly of motor vehicles. The assembly combines the vacuum booster, which assists the driver's pedal effort, with the master cylinder that generates hydraulic pressure for the brakes.

The standard is used by brake system manufacturers, automobile makers that specify and buy the assembly, and test laboratories. It is a voluntary standard, as the /T in its code shows. It was approved by the Ministry of Industry and Information Technology, issued on 16 April 2026 and takes effect on 1 November 2026. It replaces QC/T 311-2018 and QC/T 307-2016.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

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