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China Yuchai’s Export Diesels Receive Euro III and Euro IV OBD Certification

China Yuchai International Limited (Yuchai), the leading manufacturer and distributor of diesel engines in China, through its subsidiary Guangxi Yuchai Machinery Company Limited, recently received On-Board-Diagnostics (OBD) emission certificates from the TUV Rheinland Group. Yuchai is China’s first heavy-duty diesel engine manufacturer to receive this certificate.

TUV Rheinland issued certificates for Yuchai’s six series 26 Euro III model engines. After Yuchai’s newly developed Euro IV series (YC6J and YC6L) for export received e-mark certification, the YC6 series also passed TUV Rheinland’s OBD emission certification requirements


This certification signifies that Yuchai’s YC6J series engines is now one of the five major Euro IV engine emission systems widely recognized by the European Union (EU).

Since the 1980s, the United States, Japan and Europe have begun to equip electronic fuel injection (EFI) vehicles with OBD-I. A more advanced OBD-II was introduced in the mid-1990s. In the late 1990s, all imported cars into the North American markets were equipped with OBD in accordance with the new standards.

The European Union made OBD mandatory for all gasoline vehicles since model year 2001 and all diesel vehicles since model year 2004. In China, the OBD system was adopted in all National III (a Euro III emission standard equivalent) light-duty vehicles. After the roll-out of National IV standards, the city of Beijing is now requiring all new medium and heavy-duty vehicles to install the OBD system.


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