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US 6,178,951 B2Granted
Direct injection fuel pump for engine with controlled ignition and injection system comprising same
AssigneeSagem SA
InventorsJean Doreau, Michel Poirier, J{acute over (e)}r{circumflex over (o)}me Piaton
Life of this patent
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Abstract
An injection pump comprises several modules in a housing. Each module has a chamber supplying an injection circuit, separated by a deformable diaphragm from a compartment defined by a bore of the housing and by a reciprocating piston. The chamber is connected to a fuel supply and is connected to the injection circuit by a non-return valve. The pressures of the liquid in each compartment are adjusted independently. All pistons are driven by a same cam.
Claims6
A fuel injection pump comprising:
- a housing,
- a plurality of modules in said housing each having at least one chamber for supplying a fuel injection circuit, each of said chambers being separated by a deformable diaphragm from a compartment defined by a respective bore in the housing and by a piston reciprocably mounted in said bore,
- a common member for driving all of said pistons,
- non-return means for connecting each of said chambers to a fuel supply,
- non-return valve means for connecting each of said chambers to the injection circuit,and means for independently adjusting a liquid pressure in each of said compartments.
2 more elements
Dependencies are inferred from the claim text.