Common Rail Specialists
A Common Rail engine is designed to supply constant fuel pressure to electronically controlled injectors though a shared fuel rail. This means the fuel supply is not dependent on the engine revs.
A common rail system is built around four basic components:
- A high pressure pump with pressure regulator and inlet metering value.
- A rail which contains a pressurised reserve of fuel.
- Injectors which inject precise amounts of fuel into the combustion chamber as required.
- A Diesel Control Unit – the ‘brain’ of the system, which precisely controls injector flow and timing as well as rail pressure while continuously monitoring the operating conditions of the engine.
Common Rail testing
A fundamental change
Common Rail systems are already fitted to many Ford, Renault, Kia and Hyundai vehicles and many new applications are planned for the near future.
Delphi has been involved in the development of Common Rail technology from the beginning. Some of the first systems were pioneered by Lucas Diesel Systems and Delphi has inherited this expertise.
Common Rail marks a fundamental change in diesel technology and is happening now.
More and more vehicles are being introduced with Common Rail systems. It is calculated that 70% of new diesel vehicles will incorporate Common Rail injection systems and 5 million such systems will already be on the road.