Intake control system
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsKenichi Sakurai, Masami Wada, Masato Nishigaki
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Abstract
A number of embodiments of V-type internal combustion engines having an induction system which provides variable length sections for serving each combustion chamber, with each section being tuned to provide optimum charging efficiency for a different engine running speed. In addition, a flow-controlling valve is provided in the induction passages adjacent the combustion chamber and is movable between a nonrestricting flow position and a position wherein the flow is redirected to generate turbulence in the combustion chamber. The induction system is designed so as to provide a compact assembly and yet permit efficient induction and combustion under a wide range of engine speed and load conditions.
Claims53
An induction control system for supplying a charge to an engine combustion chamber comprising intake passage means terminating at valve seat means in said combustion chamber, said intake passage means having first and second sections, each tuned to provide optimum charging efficiency at a different engine running condition, throttle valve means in at least one of said sections positioned and configured for controlling the flow volume through said sections without significantly changing the flow direction into said combustion chamber, and flow control valve means in said intake passage means said flow-control valve means being movable between a first position wherein the configuration of said flow-control valve means and the adjacent portion of said section causes the flow entering said combustion chamber to flow into said combustion chamber in a first flow path and a second position where the configuration of said flow-control valve means obstructs a portion of the section to cause the flow to enter said combustion chamber in a second flow path different from said first flow path.
Dependencies are inferred from the claim text.