Induction control system for multi-valve engine

An internal combustion engine induction system for delivering an intake charge to the combustion chamber of the internal combustion engine, said induction system comprising a cylinder head forming at least in part said combustion chamber. an intake passage extending from an atmospheric air inlet to an inlet port formed in said cylinder head and communicating with the combustion chamber, said intake passage having a first generally straight section formed solely by said cylinder head and terminating adjacent said intake port and defining a central flow axis, an intake manifold forming a second section offset from said first section and defining a flow axis generally parallel to the flow axis of said first section and a curved section a throttle valve positioned in the juncture of said second section and said curved section in said intake manifold for controlling the flow therethrough, a control valve body interposed between said intake manifold and said cylinder head for joining the downstream end of said intake manifold curved section with the upstream end of said cylinder head first section, said control valve body defining a flow passage that is substantially straight and defines a flow axis coextensive with the flow axis of said first section, a flow control valve in said control valve body for redirecting the flow therethrough, and a fuel injector mounted in said curved section of said intake manifold and having a flow axis extending generally coincident with the flow axis of said first section and said control valve body flow passage and spraying fuel thereinto.

An internal combustion engine induction system for delivering an intake charge to the combustion chamber of the internal combustion engine, said induction system comprising an intake passage extending from an atmospheric air inlet to a plurality of sections each extending from a common section served by said atmospheric air inlet and each terminating at a respective one of three intake ports opening into the combustion chamber said intake ports comprising a center intake port disposed between the remaining side intake ports, said center intake port lying at least in part on a first plane containing the axis of the cylinder bore and being spaced from a second plane also containing the axis of the cylinder bore and perpendicular to the first plane and which second plane intersects the pair of side intake ports, said intake passage sections each having a first generally straight section terminating adjacent said intake port and defining a central flow axis, said common section defining a second section offset from said first sections and defining a flow axis generally parallel to the flow axes of said first sections and a curved section joining the downstream end of said second section with the upstream end of each of said first sections, a control valve in one of said intake passage sections and movable between an open position wherein unrestricted flow can occur in said one intake passage section and a closed wherein the flow through said one intake passage section is substantially restricted, and a fuel injector mounted in said curved section and having a flow axis extending generally coincident with the flow axis of said first sections.