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Common Rail System

The term "common rail" refers to a certain type of direct fuel injection system on diesel engines. The pressure generation and fuel injection components are separate from one another, with pressure being generated continuously by an independent pump that can be fitted anywhere on the engine. This pressure is stored in a distribution rail known as the common rail. Feed lines connect the injectors for all cylinders to this rail in parallel. All cylinder injectors therefore have an uninterrupted supply of fuel at a constant pressure on tap. The injection quantity and timing are regulated at the individual injectors by means of solenoid valves.