China Testing & Certification International Group Co., Ltd. (CTC, Stock Code 603060) originated from the testing and certification business of China Building Materials Academy in the 1950s. After 70 years of unremitting efforts and persistent pursuit, the company has formed five business categories: detection and testing, certification and evaluation, testing instruments and intelligent manufacturing, measurement and calibration, scientific research and technical services, committed to providing customers with technical services and comprehensive solutions of detection and testing, certification and evaluation, appraisal, consultation, training, and instruments and equipment in fields of quality, environmental protection, green, safety, health, and energy conservation.

The industry of clutch assemblies for automobiles in China has continuously evolved alongside the iteration of automotive transmission systems. In the 1980s and 1990s, with the initial development of commercial vehicles and economy passenger cars, clutch assemblies entered the stage of mass production. At that time, mechanical clutches with basic structures, such as cast iron pressure plates and asbestos friction discs, were primarily used to meet the basic transmission needs of vehicle starting and shifting. Since the turn of the century, the popularization of passenger cars and the heavy-load development of commercial vehicles have driven the upgrade of clutch assemblies towards hydraulic actuation and diaphragm spring structures. The application of aluminum alloy pressure plates and non-asbestos friction materials has achieved dual improvements in lightweight design and durability. In recent years, the rapid penetration of new energy vehicles (NEVs) has given rise to new products, such as hybrid-specific clutches and electronic clutches for conventional internal combustion engine vehicles. The demands for low rotational inertia, high torque transmission efficiency, and adaptability to electric motor operating conditions have significantly increased, accelerating the industry's transformation towards high efficiency, integration, and environmental friendliness. Currently, China has become a major global production and supply base for clutch assemblies for automobiles, with products covering all types of vehicles, including internal combustion engine vehicles and hybrid vehicles, adapting to the full spectrum from microcars to heavy-duty trucks.
We have established a specialized testing team for transmission systems, offering customized testing services for clutch characteristics, durability, adaptability, and more, based on different powertrain types and vehicle classes, helping products build competitive barriers in transmission efficiency and reliability.
Dry Friction Clutches for Automobiles (Clutch Assembly)
Cover Assembly (Clutch Cover) Functional Characteristics (e.g., diaphragm spring characteristics, release load, lift)
Driven Plate (Clutch Disc) Assembly Functional Characteristics (e.g., axial compression characteristics, torsional damping characteristics)
Clutch Durability and Reliability (e.g., wear resistance, fatigue life, performance retention under thermal cycling)
Dry Friction Clutches for Automobiles (Clutch Assembly): QC/T 25, QC/T 27
Specialized in clutch assembly performance testing for over twenty years, precisely matching the transmission system requirements of different vehicle powertrains.
A long-term strategic partner for numerous major OEMs and transmission system suppliers in core automotive industry clusters, including the Yangtze River Delta, Pearl River Delta, and Chongqing. Provided specialized testing support to renowned brands such as BYD and Shaanxi Heavy Duty Automobile, earning extensive industry recognition through a deep understanding of transmission systems.
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