Common rail fuel injection system for controlling fuel injection into multi-cylinder diesel engine, has electronic control unit controls pressure of fuel within common rail based on voltage signal output by fuel pressure sensor

摘要

The common rail fuel injection system has a fuel pressure sensor (16) with a sensor element, to output a voltage signal as a function of a pressure of the fuel stored within a common rail (12). An electronic control unit controls the pressure of the fuel within the common rail based on the voltage signal. A voltage sampling circuit samples the drive voltage applied to the sensor element. A voltage error monitor monitors whether the drive voltage as sampled by the voltage sampling circuit, is in error or not.