Experimental Research On Lowering Exhaust Emissions Of CA6110ZLA5 Diesel Engine

China will enforce emission control regulations corresponding with Europe II standard in September, 2004. Under the regulations, NOx emission will be no more than 7.0g/ (kW h) , PM 0.15 g/ (kW h) , HC 1.1 g/ (kW h) and CO 4.0 g/ (kW h) . For the moment there are only a few kinds of home-made engines and engines imported meeting this standard in China, so it's urgent to take measures to lower exhaust emission so as to meet stricter and stricter emission criterions.For CA6110ZLA5 Diesel engine, its HC and CO emission have meet the Europe II standard, so our chief task is to lower the NOx and PM emission. The formation of pollutant has a tight relation with combustion process, while the perfection degree of combustion process rests with characters of the injection and combustion system, so how to choose parameters of fuel injection and combustion systems reasonably to optimize the fuel injection law and to properly organize combustion process thus to lower emission is very vital.To begin with, author carried on injection law optimization experiments on a test bed. Through examining how various parameters of fuel injection system influence fuel injection process of D.I. Diesel engine, author found the sound fuel injection law for CA6110ZLA5 Diesel. After analyzing the influence of flow field and formation of mixed gases on creation of pollutant, author designed a new type of combustion chamber.Measures to control emissions of CA6110ZLA5 Diesel engine from the interior purification angle are presented. Through test bed experiments, different fuel injection systems turbochargers and combustion chambers were matched to the machine. Influence of various parameters on emissions was checked, with which a optimization matching scheme was finally drawn. The pollutant emissions are: NOx 6.81 g/ (kW h) PM 0.141 g/ (kW h) HC0.88g/ (kW h), CO 1.01 g/ (kW h) . They all meet the Euro II standard. , while its dynamic capability and economic performance are at the original level. During the development as well as the experimental investigation, whereby to provide the theoretic basis and practical experience for future development of other types of Diesel engine.