Unit injector system: optimal pressure in each cylinder

The unit injector system is an electronically controlled system developed by Bosch for diesel direct injection. It is suitable for cars and light commercial vehicles with up to 5 l engine capacity and 312 hp engine power, the first installation in series production cars was 1998.

Technical characteristics

The special feature of the unit injector system is that an individual pump is assigned to each cylinder. The pump and nozzle are therefore combined in a compact assembly which is installed directly in the cylinder head. The unit injector system enables high injection pressures up to 2,200 bar.

Advantages

• High performance for powerful engines
• High engine power balanced against low consumption and environmentally friendly emissions
• High degree of efficiency due to compact design
• Low noise level due to direct assembly in the engine block
• Injection pressures up to 2,200 bar for the ideal combination of air-fuel mixture