【摘要】 柴油机燃烧室表面涂以薄层催化剂后,具有催化和反射一定波长红外波的作用。本文论述其表面对柴油机燃烧是否有影响以及有着什么样的影响。经柴油机整机性能对比试验,对示功图、放热率曲线及排气成分的分析比较表明,具有催化和反射红外波的柴油机燃烧室对燃烧过程起着有利的作用。更多还原

【Abstract】 The combustion chamber surface in a diesel engine is coated with athin layer of catalyst.The catalystic surface can also reflect infraredradiation.The test engine is a single diesel engine with 100mm bore and 120mmstroke.The experimental results were obtained with all parameters,such as compression ratio,output load,compression pressure at TDC,oiland water temperature,all equalized between the normal chamber and coated chamber.The combustion chamber can keep the burning quality well.It notonly accelerates the rate of evaporating the fuel spray,but also shortensthe ignition delay.It is shown by the curves of rate and integral rate ofheat release that the combustion is complete.Thus,the efficiency ofthe diesel engine is raised,the fuel consumption is made a 9% reductionon rich side and a more reduction on lean side.It is pointed out spe-cially that this combustion process can work on lean side very well.The exhaust emissions of this diesel engine,such as smoke,hydrocarbon,pungent odor and NO_x are lowered.But,it is necessary to make effortsto prolong the active life of the coated surface.更多还原