Study on Slow Pressure Establishment of Oil Pressure Sensor in Cold Engine Starting State
In order to solve the problem of slow oil building pressure in diesel engine under cold starting state,the time of oil entering pressure sensor at room temperature and low temperature was simulated by using Pumplinx fluid dynamics analysis software.At the same time,through testing and analyzing the actual engine oil filling time of the sensor at room temperature and low temperature,it is determined that the oil viscosity and the aperture of the closure hole inside the sensor have important influences on the oil entering the main oil duct and the sensor interior.With the increase of the hole diameter,the impact of the oil pressure pulse on the sensor chip is weakened,and the pressure building time is affected.At low temperature,the oil viscosity is large,resulting in slow oil pressure building.In order to solve the problem of slow oil building pressure,it is recommended to optimize the cold start fault diagnosis strategy based on the high oil viscosity at low temperature without heating measures.
万方数据
维普
