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A mounting arrangement and method for installing fuel injectors in a molded composite intake manifold having an integral fuel rail portion in which the injectors are first assembled into bores in the fuel rail portion, and the intake manifold advanced onto a cylinder head surface having bores extend

A mounting arrangement and method for installing fuel injectors in a molded composite intake manifold having an integral fuel rail portion in which the injectors are first assembled into bores in the fuel rail portion, and the intake manifold advanced onto a cylinder head surface having bores extending perpendicularly into the surface so as to allow the tips of the fuel injectors to be seated therein at the same time as the manifold is mounted. Air assist passages are also integrally formed in the intake manifold aligned with passages in the cylinder head.

대표청구항 ▼

An air assist fuel injector mounting arrangement for an internal combustion engine of the type having an engine block having a plurality of engine cylinders mounted therein, a cylinder head mounted to the cylinder block, an intake manifold mounted on the cylinder head and having a plurality of runne

An air assist fuel injector mounting arrangement for an internal combustion engine of the type having an engine block having a plurality of engine cylinders mounted therein, a cylinder head mounted to the cylinder block, an intake manifold mounted on the cylinder head and having a plurality of runners, each adapted to supply air flow to a respective engine cylinder, a plurality of fuel injectors each adapted to direct a spray of fuel into the air flow into each runner; the intake manifold having an integral fuel rail portion for supplying pressurized fuel to the plurality of fuel injectors by means of pocket bores: an air assist supply passage integrally formed in the intake manifold communicating with air passages in the cylinder head connecting with stepped fuel injector bores in the cylinder head; wherein said fuel injectors are each mounted in axially aligned, spaced apart stepped bores formed in the cylinder head and said pocket bores formed in the fuel rail portion respectively; and wherein said intake manifold is formed with a mounting flange abutting said cylinder head surface, and wherein said air supply passage is formed by a surface groove let into said manifold face.