Researches on Combustion Quality for a Single Cylinder Diesel Engine

The present paper presents researches on combustion quality for a Diesel single cylinder engine. The tests ware made on an AVL single cylinder test bed for gasoline and diesel engines. In this case, it was used an AVL 510 cc Single Cylinder Engine Type 5402. The quality of the combustion for this engine was analyzed and compared with the theoretical principles. During the test was noticed that the main engines parameters are variable for 100 engine cycles. The variation occurs in function of the air temperature, air/fuel mixture formation, cooling system variation, combustion start moment and several engine design parameters. In order to increase the combustion quality, some measures can be applied: using different injection strategies; varying the advance angle of the spark related to TDC; varying the quantity of fuel injected per engine cycle; optimization of combustion chambers.