Standards

QC/T 1223-2025 Special requirements for the heavy commercial vehicle and combination vehicles fitted with lift axle

This document specifies the special technical requirements and test methods for heavy commercial vehicles and vehicle trains equipped with lifting bridges.
This document is applicable to Class N3 vehicles, Class O4 semi-trailers, and the vehicle trains composed of them, which are equipped with lifting bridges.

Publish Date: 2025-05-09

QC/T 1224-2025 Method for judging spring effect of commercial vehicle equipped with air suspension

This document specifies the technical requirements for determining the vibration reduction effect of air suspension systems on commercial vehicles, as well as the test methods for the natural frequency and damping ratio of the entire vehicle.
This document applies to vehicles of classes M2, M3, N2, N3, and O3 equipped with air suspension systems on the rear axle. Other vehicles may refer to this document for implementation.

Publish Date: 2025-05-09

QC/T 476-2025 Requirement and test method for rain proof performance of bus

This document specifies the performance requirements, test conditions, and test methods for the rainproof sealing performance of passenger cars.
This document applies to Class M2 and Class M3 passenger cars. Other vehicles should refer to it for implementation.

Publish Date: 2025-05-09

QC/T 1230-2025 Wheel side drive axle of electric bus

This document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage for wheel-edge drive axles used in electric buses.
This document applies to wheel-edge drive axles used in M3-class electric buses. Other vehicles can refer to it for implementation.

Publish Date: 2025-05-09

QC/T 1228-2025 Test method for automotive organic light emitting diode(OLED) light sources

This standard specifies the performance parameters of organic light-emitting diode (OLED) lighting sources for automobiles (hereinafter referred to as "OLED lighting sources") in terms of optical characteristics, electrical characteristics, and automotive durability characteristics, as well as the standard test conditions and standard test methods for these performance parameters.
This standard applies to OLED lighting sources used in automotive interior and exterior lighting fixtures.

Publish Date: 2025-05-09

QC/T 29018-2025 Metallographic examination for automobile carbonitriding gears

This document specifies the metallographic structure, the effective hardening layer depth, and the testing methods for the surface and core hardness of steel automotive gears subjected to carbon-nitrogen co-infiltration treatment.
This document is applicable to the quality inspection of automotive gears with an effective hardening layer depth of more than 0.3 mm after completing all heat treatment processes.

Publish Date: 2025-05-09

QC/T 983-2025 Measuring method of cleanliness of automobile transmission assembly

This document specifies the method for detecting the cleanliness of automotive transmission assemblies.
This document is applicable to the cleanliness detection of M-class and N-class automotive transmission assemblies and electric drive assemblies (including lubricating oil and components).

Publish Date: 2025-05-09

QC/T 471-2025 Automotive diesel engine

Publish Date: 2025-05-09

QC/T 289-2025 Oil pump of automobile engine

This document specifies the terminology and definitions, symbols, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of automotive engine oil pumps.
This document is applicable to mechanical oil pumps (referred to as "oil pumps") used in automotive engines.

Publish Date: 2025-05-09

QC/T 544-2025 Camshaft of automobile engine

This document specifies the classification and structural types, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of automotive engine camshafts.
This document applies to integral camshafts and mechanical interference-fit combined camshafts (hereinafter referred to as "camshafts") used in automotive engines.

Publish Date: 2025-05-09

QC/T 631-2025 Exhaust muffler assembly of automotive

This document specifies the terms and definitions, technical requirements, test methods, inspection rules, and markings, packaging, transportation, and storage of automotive exhaust mufflers (hereinafter referred to as "mufflers").
This document is applicable to exhaust muffler assemblies for M-class and N-class motor vehicles.

Publish Date: 2025-05-09

QC/T 798-2025 Multi‑layers plastic tubing for automotive fuel system

This document specifies the marking, dimensional specifications, technical requirements, inspection rules, packaging, transportation, and storage requirements for multi-layer plastic fuel pipes used in automobiles (hereinafter referred to as "multi-layer pipes"), and describes the testing methods.
This document is applicable to the production, inspection, sale, and use of multi-layer plastic fuel pipes with a usage temperature range of -40 °C to +135 °C, a working medium of gasoline or gasoline vapor, and a maximum working pressure not exceeding 0.7 MPa.
This document is applicable to straight-wall pipes. For corrugated pipes, refer to the relevant testing methods according to the specific usage environment.

Publish Date: 2025-05-09