Composite molded butterfly valve for an internal combustion engine

A valve assembly for selectively controlling air flow to a cylinder of an internal combustion engine comprising a molded composite housing having an upper sealing surface, a lower sealing surface, a plurality of combustion air through passages extending from said upper to said lower sealing surface and an axially extending valve bore defining an axis through said housing, said axis extending through said passages and said bore defining valve shaft bearing surfaces in said housing walls, said valve assembly further comprising a molded composite valve member having an axial valve shaft disposed in said valve bore and integral valve plates, disposed in predetermined through bores, said valve member molded in said valve housing and rotatable in said valve bore to open and close said valve plates for regulation of air flow through said predetermined through bores.

A combustion air intake system for an internal combustion engine having an intake manifold operable to supply intake air to said engine through pairs of differing length intake runners, said intake system further comprising a valve assembly, disposed between said intake runners and said engine, including a molded composite housing having an upper sealing surface, a lower sealing surface, a plurality of combustion air through passages, extending from said upper to said lower sealing surface, and an axially extending valve bore defining an axis through said housing, said axis extending through said passages and said bore defining valve shaft bearing surfaces in said housing walls, said valve assembly further comprising a molded composite valve member having an axial valve shaft, disposed in said valve bore, and integral valve plates, disposed in predetermined through bores, said valve member molded in said valve housing and rotatable in said valve bore to open and close said valve plates for regulation of air flow through said predetermined through bores.

A combustion air intake system for an internal combustion engine having an intake manifold operable to supply intake air to said engine through a plurality of pairs of differing length intake runners, said intake system further comprising a valve assembly, disposed between said intake runners and said engine, including a molded composite housing having an upper sealing surface, a lower sealing surface, a plurality of pairs of combustion air through passages, extending from said upper to said lower sealing surface, said pairs of through passages in flow communication with associate pairs of intake manifold through passages, and an axially extending valve bore defining an axis through said housing, said axis extending through said passages defining valve shaft bearing surfaces in said housing walls, said valve assembly further comprising a molded composite valve member having an axial valve shaft, disposed in said valve bore, and integral valve plates, disposed in predetermined through bores, said valve member molded in said valve housing and rotatable in said valve bore to open and close said valve plates for regulation of air flow through said predetermined through bores.