There are a several things that can cause failures in common rail injectors and some of those are; Ball seat erosion. Nozzle erosion. Solenoid coil winding shorting.
Why is common rail diesel better?
This more specific fuel mix delivers better efficiency, meaning an increase in power and a decrease in fuel consumption. Common-rail engines are generally quieter with less knocking and vibration. These more sophisticated engines require the best in car care – which is exactly what we provide at Car Service Salisbury.
What is a common rail explain?
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.
What is the purpose of the common rail in an injection system?
The rail serves as a fuel accumulator to maintain a relatively constant pressure at all fueling rates used by the engine. From the rail, the fuel is supplied to the injectors via high pressure pipes. The ECU generates current pulses which energize a solenoid valve in each injector in sequence.
What causes common rail failure? – Related Questions
Why is it called a common rail?
The term “common rail” refers to the fact that all of the fuel injectors are supplied by a common fuel rail which is nothing more than a pressure accumulator where the fuel is stored at high pressure. This accumulator supplies multiple fuel injectors with high-pressure fuel.
Why do common rail injectors fail?
Why do Common Rail injectors fail? Although Common Rail injectors are designed to last, advances in injection technology mean that they are more prone to wear from issues including: Particle contamination: With tolerances a fraction the width of a human hair, even the smallest of particles can cause significant damage.
How long do common rail injectors last?
The life expectancy of a good quality diesel fuel injector is around 150,000 kilometres.
Can common rail be repaired?
The problem is that the repair of Common Rail components can be rather tricky. Factories assemble the components under pollutant-free conditions with tolerances in the neighbourhood of 1µm. Even the tiniest of dirt particles can entail downtime and result in costly damage if a repair job is carried out improperly.
Can common rail injectors be cleaned?
K2 Diesel Dictum is a cheap and effective way that you can remove dirt from Common Rail injectors. The solution dissolves and removes impurities from the entire fuel system, not only from the injectors. It also cleans the high-pressure pump and the entire injection moulding.
What is the component of common rail injection system?
Abstract: The components of a common rail fuel injection system include the rail, a high pressure pump and fuel injectors. Radial, unit and in-line pumps are used in commercial common rail systems.
What is the injection pressure of common rail system?
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.
How does a common rail pressure sensor work?
It is a part of vehicle’s fuel system and designed to monitor the fuel pressure that is present at the fuel rail. The sensor sends this signal to the ECU, which then uses it to make adjustments to the vehicle’s fuel and timing. When the sensor has an issue it can cause problems with the performance of the vehicle.
Why does the fuel rail in the injection system needs to maintain a constant pressure?
This helps to prevent a loss of effective pressure during wide open throttle, and also helps to prevent injectors from having to run extremely low pulse widths to fuel at idle.
What psi should fuel rail pressure be?
Fuel pressure for most vehicles should stay in a 5- to 10-psi range.
What happens when fuel rail pressure is too high?
High fuel pressure will make an engine run rich, while low fuel pressure will make an engine run lean or not at all. Fuel pressure readings that are higher than manufacturers specifications are generally caused by a problem in the return line fuel components.
How do you fix fuel rail system pressure too low?
The most common repairs to resolve a P0087 trouble code are:
- Confirm the code with an OBD-II scanner, and reset the diagnostic code.
- Replace the fuel filter or screen (most common)
- Replace damaged or kinked fuel lines.
- Replace faulty fuel pressure sensor.
- Replace the fuel pump.
What causes low common rail pressure?
Low fuel rail pressure can have a few different causes. It could be a problem with the fuel pump, a blockage in the fuel line, or an issue with the pressure regulator. Distance traveled, duration of time engine is off, and fuel temperature can all affect fuel rail pressure.
How do I know if my fuel rail is clogged?
These Are the Signs That Your Fuel Injectors Are Clogged
- Misfiring Engine. If you notice that your engine is sputtering, especially when you accelerate, it’s possible that your fuel injectors are partially clogged.
- Rough Idling.
- Poor Fuel Economy.
- Sporadic RPM Needle.
- Dead Engine.
