What is a high-pressure common rail fuel system?
Common rail direct fuel injection is a direct fuel injection system built around a high-pressure (over 2,000 bar or 200 MPa or 29,000 psi) fuel rail feeding solenoid valves, as opposed to a low-pressure fuel pump feeding unit injectors (or pump nozzles). Common rail injection is widely used in diesel engines.
Does a high-pressure fuel pump use more fuel?
A bad pressure regulator or failing fuel pressure sensor may allow the pump to run at a higher psi than the factory setting. If fuel pressure runs consistently high, the injectors will pump slightly more fuel through than they should.
What should common rail fuel pressure be?
Common rail direct fuel injection is a direct fuel injection system for petrol and diesel engines. On diesel engines, it features a high-pressure (2,000 BAR – 29,000 PSI) fuel rail feeding individual solenoid valves, as opposed to a low-pressure fuel pump feeding unit injectors or pump nozzles.
When was common rail fuel injection system introduced?
Development work on common rail fuel injection systems by MTU from 1990 benefited the German designer’s Series 4000 high speed model (see Chapter 30) which was introduced in 1996 as the first production engine in its class to feature such a system (Figure 8.19).
What are the symptoms of a bad fuel rail pressure sensor?
Here is a more detailed list of the 5 most common symptoms of a bad fuel pressure sensor. As already mentioned, the fuel rail supplies the cylinders with the same fuel. The mechanism that ensures that the fuel rail is efficient is the fuel rail pressure sensor.
Where is HPFP located in a fuel pump?
As already mentioned before, LPFP provides stabilized 5000 hPa pressure, which is controlled by fuel low-speed rail sensor, which is located not far from HPFP. HPFP is directed by a solenoid, which is directed with PWM (by DME) and is located in the pump.