High pressure delivery unit for fuel injection system use for IC engine, has bush-shaped body, valve body unit with surfaces with different geometries forming seal surface on ends facing high pressure chamber

摘要

The delivery unit has a distributor unit with an actuator unit for a control part movable in a valve body unit and subjected to high pressure from a high pressure chamber bounded by a bush-shaped body enclosing a distributor piston and the valve body unit. The bush-shaped body (4) and valve body unit (13) have surfaces (32,36) with different geometries forming a seal surface (38) on their ends (5,48) facing the high pressure chamber (11).