US 7,406,936 B2 · Accumulator fuel system

Abstract

An accumulator fuel system for an internal combustion engine having a plurality of engine cylinders, includes an accumulator fuel volume (12; 112) for supplying high pressure fuel to one or more of a plurality of injectors (10) of the fuel system, each of which is arranged to supply fuel to an associated one of the engine cylinders. The accumulator fuel volume (12; 112) is integrated within an engine component, where the engine component provides a purpose other than that solely of an accumulator volume for storing high pressure fuel. For example, the accumulator volume (12; 112) is defined in one embodiment within a rocker shaft (32) of the engine and in another embodiment within the engine cylinder head (16).

Claims7

Dependent claims

An accumulator fuel system for an internal combustion engine having a plurality of engine cylinders, the fuel system comprising:

a plurality of injectors, each of which is arranged to supply fuel to an associated one of the engine cylinders,
a rocker shaft upon which a rocker member is pivotally mounted, wherein the rocker member is ranged to control one or more inlet and/or exhaust valves of an associated engine cylinder,
an accumulator fuel volume integrated within the rocker shaft for supplying high pressure fuel to one or more of the plurality of injectors,
wherein the accumulator fuel volume is arranged to supply fuel at a first pressure level to one or more of the plurality of injectors and wherein each injector includes a pumping element for pressurising fuel to a second pressure level higher than the first pressure level.

1 more element

Dependencies are inferred from the claim text.

Accumulator fuel system

Life of this patent

Accumulator fuel system

Life of this patent

Abstract

Claims7