Estimation the effect of exhaust residual gas on effective release energy, NOx emission and the influence of engine parameters on exhaust residual gas fraction of a V-twin engine

摘要

this paper estimates and summarized the parameters which affect the exhaust residual gases fraction and the influence of residual gas fraction on engine effective release energy, NOx emission which weren’t presented yet in the previous articles. It is complicated to determine the residual gas fraction ratio, the effective release energy under the various testing conditions from the experiments. Through combined experimental and simulation methods we eliminated certain above drawbacks. From results of the research, we thoroughly investigated the effects of engine speed, air-fuel ratio, valve overlap, combustion duration, intake port diameter-bore ratio, and bore-stroke ratio on the internal exhaust residual gases fraction.