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

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Scope

This Document specifies the technical requirements for judging the vibration reduction effect
of commercial vehicles equipped with air suspension, as well as the vehicle test methods for
natural frequency and damping ratio.
This Document applies to M2, M3, N2, N3, O3, and O4 category vehicles equipped with rear axle
air suspension; other vehicles shall refer to this Document for guidance.

Basic Data

Standard ID	QC/T 1224-2025 (QC/T1224-2025)
Description (Translated English)	Method for judging spring effect of commercial vehicle equipped with air suspension
Sector / Industry	Automobile and Vehicle Industry Standard (Recommended)
Classification of Chinese Standard	T04
Classification of International Standard	43.020
Word Count Estimation	14,151
Date of Issue	2025-05-09
Date of Implementation	2025-11-01
Issuing agency(ies)	Ministry of Industry and Information Technology of the People's Republic of China