Research and Solution of Signal Drift Fault of Fuel Tank Pressure Sensor of a Vehicle Type
Fuel tank pressure sensor is an important component of fuel system,which provides pressure signal for engine control unit.Its signal drift will affect the authenticity of leakage diagnosis and even false alarm of engine failure light.Based on the analysis of the failure mechanism,parts themselves and the surrounding environment,the paper determined that the root cause was the static electricity around the pressure sensor of the fuel tank caused the change of electrostatic bond force,resulting in the change of stress in the bonding area and the transmission to the sensitive area of the MEMS chip,and the output signal drift occurred when the sensor was beyond the factory calibration range.By improving the surrounding electrostatic accumulation,the pressure drift fault is effectively solved.
signal driftstatic electricityinstallation position
万方数据
维普
