The latestgeneration of high-pressure petrol pumps from Bosch, which can be used for fuelpressures of more than 200 bar. Tappet and solenoid can clearly be seen. Thetappet can be moved. The key to direct injection is a high-pressure fuel pump.This pump is precision-machined to generate fuel pressure to the rail up to2,500 psi. These high-pressure fuel pumps are typically driven by a camshaftand are able to vary their displacement and output to match the needs of theengine.