The Experiment Research By The Application Of Conical Nozzle And Double Squish Flow Annular Chamber On Diesel Premixed Charge Compression Ignition Combustion

In this paper we utilizes the Double Squish Flow annular chamber and the Umbralle nozzle on the basis of the original injection sets of the 1135 diesel engine to reduce the emission and the b_e. The experiment indicates that, with the help of the Double Squish Flow annular chamber, improve the equality of the mixed-gas, reinforce the combustion of the latter period reduce the rate of fuel consumption of the diesel and the emission, especially reduce the emission rate of NO_x.Based on the research of conventional diesel combustion and the analysis of diesel HCCI combustion, with the Double Squish Flow annular chamber and the Umbralle nozzle, make the experiment research in a single cylinder diesel system bench on 1135 type single cylinder test engine.To meet the requirement of energy crisis and stringent exhaust emission legislations, more emphasis are laid on how to reduce both fuel consumption and emissions. However, characteristics of conventional DI diesel engine combustion determine the compromise between fuel conversion efficiency improvement and harmful emission control, ad well as the tradeoff between NO_x and PM emissions control. Therefore, DI diesel engine development is extremely difficult due to this reason. To solve this problem, the conventional DI diesel engine combustion must be renovated. As a new kind of combustion, Homogeneous Charge Compression Ignition (HCCI) combustion can decrease NO_x and PM emission simultaneously and maintain high fuel conversion efficiency close to direct injection diesel engine. With these two advantages, HCCI combustion is becoming one of the most promising technologies in IC engine field.