D family engine

 The D series benchmarks the mature technology of international advanced engines with power range 185-308kw, and has successively cooperated with AVL in Austria and Southwest Research Institute(SWRI) in the United States to improve the strength of the engine boby and upgrade the four-valve arrangement. the D series engine is characterized by high reliability and good fuel economy .the D series is a lately-designed engine with advanced technical criteria among the domestic mature engines. the engine has sold  well for almost 20 years with over one million of units in the markets. its cold start temperature is as low as at -15­°C without an air intake heating aid, and its cold start temperature can drop down to -30­°C with the aid, providing strong environmental adaptability.