Ethanol - Diesel - Gasoline Mixed Fuel In The Diesel Engine Research

The fuel ethanol is reproducible resource. It has an important meaning to explore its application on the diesel engine as substituted fuel for our nation' s energy sources, environmental protection, agriculture and so on.The paper presents a way that on a diesel engine the fuel ethanol is used blended with gasoline as its additive. On the base of analyzing the physical, chemical and mixing proportion characteristics of ethanol-diesel-gasoline blended fuel, combustion characteristic and the effect on diesel engine performance using the blended fuel with different proportional component are studied on a 135 diesel engine. At the same time, the effect on the diesel engine performance and combustion characteristics using the blend fuel are also studied under different diesel engine parameter. The results show that the blended fuel with ethanol and diesel oil dissolving each other completely can be successfully gained when gasoline is used as the additive, and on the condition of not changing the basic structure of original engine, the blended fuel can be used and can get the same level as original engine' s power, and brake specific fuel consumption rate approximately corresponds with the original one' s. When using the conical spray H1 nozzle with the blended fuel, both PM and NO, emission of the engine are obviously reduced, especially the NO, .After using the blend fuel, the period of ignition delay becomes longer, the combustion velocity becomes quicker, the combustion temperature becomes lower, and the period of combustion duration becomes shorter.Furthermore, the performance Comparative experiment is also carried out between a wmodel and a newly designed contract throat combustion chamber which has a raised dais on the center. The test shows that the diesel engine performance can get some improvement when the latter combustion chamber is used.