Diesel Fuel Pressure Sensor

Your common rail diesel engines is fitted with a fuel pressure sensor.

Diesel fuel pressure sensor.

The pump maintains the rail pressure by continuously delivering fuel to the common rail. This pressure is monitored by a pressure sensor and the difference between the nominal rail pressure value and the measured one is the input signal for the controller. The major culprits are likely to be the fuel injectors high pressure pump fuel filter fuel pressure sensor or regulator glowplugs or crankshaft sensor. The fuel pressure sensor 4 provides a voltage signal to the ecm to indicated fuel rail pressures.

The fuel rail pressure sensor in the common rail 6 7l diesel measures the pressure of the fuel supplied to the fuel injectors. The fuel pump receives the fuel from the fuel tank and throws it into the fuel rail which transfers the liquid into the cylinders using the knowledge of the fuel pressure sensors. The high pressure fuel is supplied to the fuel injectors 1 through separate high pressure pipes. The fuel pressure sensor senses the amount of fuel in the fuel rail by reading the internal pressure of the rail.

Naturally if the pressure is not according to the manufacturer s recommendations you will experience little to no response from the car s engine. Most of the potential problems in a modern common rail diesel system engine can be explained by a drop in fuel pressure or engine compression insufficient fuel supply or fuel contamination. The pcm is the main computer of a vehicle. In european cars the most common make is bosch.

This pressure signal is used by the pcm to adjust the fuel injector pulse width and duration while metering fuel to each cylinder during the combustion cycle. The fuel rail pressure sensor is responsible for analyzing the pressure of the fuel that is inside the rail of the fuel pump assembly. The fuel injectors supply fuel directly to the combustion chambers of the engine. This sensor is an electronic device which calculates the fuel pressure and then sends this information to the pcm powertrain control module.

Followed by delphi and siemens and then denso the fuel pressure sensor signals the pressure in the fuel rail to the ecu. It can then send an electronic message to the pcm telling it precisely how much fuel needs to be released into the engine.