High-pressure pump with an on-off valve for feeding fuel to an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsWerner Banzhaf, Peter Grabert, Nicola Cimaglia
Life of this patent
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Abstract
The pump has a body including at least a fuel compression chamber and an actuating chamber enclosing the actuating members of the pump. The on-off valve has a shutter sliding inside a hole in the body to close a fuel feed conduit. The shutter is held in the closed position by a compression spring, which rests directly or indirectly on a shoulder in the hole. In one embodiment, the spring rests on the shoulder via a perforated disk held by a retaining ring, which clicks removably inside an annular groove in the hole. In a further embodiment, the spring rests directly on the shoulder.
Claims10
A high-pressure pump with an on-off valve for feeding fuel to an internal combustion engine, wherein the pump comprises a body including at least a fuel compression chamber and an actuating chamber enclosing actuating members of the pump, and wherein said valve comprises a shutter sliding inside a hole in said body to close a fuel feed conduit;
- said feed conduit being formed in said body, between said hole and said compression chamber;
- said shutter being held in a closed position by a compression spring;
- and wherein, inside said hole, a shoulder is formed in one piece with said body, said spring resting on said shoulder by virtue of means including a disk having an opening permitting fuel flow to said actuating chamber, said disk being inserted removably inside the hole.
Dependencies are inferred from the claim text.