Fuel injector for internal combustion engine with high-pressure piston pump and valves has pump working area linked on intake to low-pressure source and on compression to high-pressure reservoir

摘要

A valve unit forms a valve module (4) covering a pump casing (3) on its head side and mounted on a flange against the pump casing. The valve module with seats for valve members like a return-stroke piston and an inhibiting piston acts as a support for a flange-mounted reservoir module (5) with a high-pressure reservoir. The reservoir module has a low-pressure channel leading to a source of low pressure and is attached on the valve module opposite the pump casing.