The first series-produced Common Rail System was marketed by Bosch in 1997. The system derives its name from the high-pressure accumulator (Common Rail) which supplies all the cylinders with fuel.
While other diesel injection systems generate the fuel pressure for each injection separately, the Common Rail System separates pressure generation and injection from one another. The fuel is constantly available at the pressure required for injection.
Design and components
The Common Rail System is modular in design. The right combination of high-pressure pump, injectors, rail and electronic control unit results in systems for all types of vehicle from the smallest passenger cars right up to the heaviest luxury limousine.
Our range of high-pressure pumps covers pressures from 1,100 bar to 2,700 bar. As a cost-favorable version, unit pumps (plug-in pumps) can also be used to generate the high pressure. The injector can be supplied with either solenoid-valve or piezo technology.
The high-pressure rail is selected to match the number of engine cylinders and the pressure level required.
- Clean and highly-efficient fuel injection thanks to extremely brief injection gaps and multiple injections
- High engine performance and quiet running with low fuel consumption and emissions
- Matching systems for all types of vehicle thanks to modular design