Test on Effect of Residual Exhaust Gas Coefficient on Thermal Work Conversion Performance of Internal Combustion Engine Cylinder
In order to study the effect of residual exhaust gas coefficient on the thermal power conversion performance of internal combustion engine cylinder,a naturally aspirated single cylinder machine was used to carry out bench test,and the thermal power conversion effect and emission characteristics of internal combustion engine caused by RGF were analyzed.The results show that the combustion phase increases rapidly and monotonic ally after increasing the residual gas coefficient.The residual exhaust gas in the cylinder can play the role of diluting the fresh mixture,resulting in a decrease in the combustion rate and a rapid increase in the combustion duration.In the process of increasing the residual gas coefficient,it keeps monotonically increasing from the initial ignition time to the 50％combustion point.When the speed increases,the crankshaft angle from ignition to 50％combustion point also increases significantly.After the residual gas coefficient is increased,the thermal efficiency of high pressure circulation indicates a small increase.There is a negative correlation between combustion temperature and residual gas coefficient in the cylinder.Combustion deterioration occurs at 50％of the combustion points.This method has high prediction accuracy,can greatly reduce the cost of sensor,and has high practical application value.
gasoline engineresidual gas coefficientcombustionemission
国家科技期刊平台
NSTL
万方数据
