Experimental study on the gas exchange process of different intake valve closing in a 4-stroke diesel engine

A single cylinder diesel engine was modified to operate at different late intake valve closing timings (LIVC), the gas exchange process is studied by experiment. The results shows that with the retard of intake valve closing times (IVC), the losses of gas exchange work are decreased at the same intake air flow conditions, and the pressure drops of intake process are increased, the scavenging processes strengthen, and the residual gas fractions in cylinder are obviously decreased.