Diesel Fuel Pressure Sensor

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.

Diesel fuel pressure sensor.

Followed by delphi and siemens and then denso the fuel pressure sensor signals the pressure in the fuel rail to the ecu. The fuel rail pressure sensor is responsible for analyzing the pressure of the fuel that is inside the rail of the fuel pump assembly. In european cars the most common make is bosch. 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 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. 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. It is a part of vehicle s fuel system and designed to monitor the fuel pressure that is present at the fuel rail.

It can then send an electronic message to the pcm telling it precisely how much fuel needs to be released into the engine. Naturally if the pressure is not according to the manufacturer s recommendations you will experience little to no response from the car s engine. 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 high pressure fuel is supplied to the fuel injectors 1 through separate high pressure pipes.

The fuel pressure sensor 4 provides a voltage signal to the ecm to indicated fuel rail pressures. The fuel pressure sensor senses the amount of fuel in the fuel rail by reading the internal pressure of the rail. Your common rail diesel engines is fitted with a fuel pressure sensor. The fuel rail pressure sensor provides feedback to the ecm which regulates the rail pressure by varying the volume of fuel delivered by the high pressure pump and or controlling the flow of excess fuel from the rail to the fuel return system.

The pcm is the main computer of a vehicle. The fuel rail sensor commonly referred to as the fuel pressure sensor is an engine management component that is commonly found on diesel and some gasoline injected vehicles.