By referring to the results concerning design improvement on the intake and exhaust manifolds of Model 12V190ZC diesel engine, the influence of structural parameters of manifolds on engine performance is discussed.

• 本文分析了12V190ZC型柴油机进排气道各部位结构参数、位置布置参数对性能的影响; 测量了气阀周围的流场分布;