Ignition Characteristics of Diesel Engine Under Low-Temperature Start Condition
The compression pressure and temperature during low-temperature start was analyzed on a V-type 8-cylinder turbocharged diesel engine,and then the ignition characteristics of diesel spray was studied in a constant-volume spray combustion test device with background temperature and density based on the low-temperature start condition of the engine.The relationship between ignition delay period and ignition position under different back-ground temperature and density conditions was studied.It is found that the ignition delay of diesel free spray in-creases and the ignition stability decreases with the decrease of background temperature.When the background tem-perature is below 430 ℃,the success rate of diesel jet ignition is very low,leading to misfire.The research result is of great significance for improving the stability of low-temperature start and improving fuel consumption and emissions for the diesel engine.
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维普
