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What is a common rail？
Common rail is a fuel injection system found in modern diesel engines. Common rail systems provide a level of flexibility which can be exploited for class leading emission control, power and fuel consumption.
1.What is a common rail fuel pump？
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).
2. How does a common rail high pressure fuel pump work?
The pump compresses the fuel and feeds it via a high-pressure pipe to the inlet of the rail, which acts as a shared high-pressure reservoir for all injectors – hence the name ‘common rail. ‘ From there, the fuel is distributed to the individual injectors, which inject it into the cylinder’s combustion chamber.
3. What happens when a diesel pump fails?
Symptoms of a failing fuel pump may include: Jerks or sputters at high speeds. Power loss on acceleration. Power loss while driving up a slope.
4. What are the symptoms of a failing high pressure fuel pump?
Symptoms of a high-pressure fuel pump failure are:
- Delayed start of the engine.
- Hesitation or sputtering in acceleration between 2000 RPM to 4000 RPM.
- High engine temperatures.
- Vehicle stalling due to exertion or temperature.
- Fuel pressure gauge reading low measurements.
- Poor gas mileage.