CHINA Yuchai, through its main operating subsidiary Guangxi Yuchai Machinery Company Limited (GYMCL), as announced that 18 school buses powered by the YCS04160-60 engine have passed emission tests and are now operating in Shenzhen, China.

The YCS04 series of engines is compliant with China’s National VI emission standards for use in light- to medium-duty buses and trucks. The engines have a displacement volume of 4.16 litres and a maximum power output of 180 horsepower with a maximum torque of 650 N-m. The YCS04 engines, launched in January 2018, are also one of 14 new engine models compliant with China’s National VI emission standards.

The National VI standards are expected to be fully implemented by mid-2020 in China. It features more stringent conditions such as the introduction of emission limits for carbon monoxide, total hydrocarbons and nitrogen oxides, and strict evaporative and refuelling emission-control requirements.

The city of Shenzhen is one of the largest municipalities and a Tier One city in Southern China with nearly 13 million residents and represents the pioneer batch of Yuchai’s National VI emission technology introduced in the city.

Mr Hoh Weng Ming, President of China Yuchai, commented, “This order is a major milestone in the development and recognition of our self-developed National VI emission technology.”