Intake system
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsManabu Kobayashi, Akira Yamaguchi
Life of this patent
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Abstract
An induction system for a V-type engine that permits a compact engine configuration and the tuning of two different intake passages for each cylinder for different engine speed ranges. The shorter high-speed intake passages are served by the plenum chamber adjacent the cylinder bank while some of the other intake passages are served by the adjacent plenum chamber and others are served by the other plenum chamber. The second intake passages all have the same length and the configuration is such so as to provide substantially equal flow lengths for the intake air and to substantially preclude adjacent firing cylinders drawing air from the same plenum chamber under at least some running conditions,
Claims62
An induction system for an internal combustion engine having a pair of angularly disposed cylinder banks each having at least two cylinders for a total of N cylinders, first and second plenum chambers each juxtaposed to a respective one of said cylinder banks, a first series of first intake passages, each of said first intake passages extending from each of said cylinders to the juxtaposed plenum chamber, a second series of second intake passages of a number less than the number of cylinders, each of said second intake passages extending from a first number n of said cylinders to the juxtaposed plenum chamber, and a third series of third intake passages, each of said third intake passages extending from the remainder (N-n) of said cylinders to the nonjuxtaposed plenum chamber.
An induction system for an internal combustion engine having a plurality of cylinders aligned in a bank, a plenum chamber having an atmospheric air inlet at one end thereof, a plurality of inlet passages extending from said cylinders into said plenum chamber and opening therein at positions spaced along its length, and means forming an internal duct in said plenum chamber extending from said atmospheric air inlet to a point in said plenum chamber substantially at the center of the openings on said inlet passages in said plenum chamber.
An induction system for a V-type engine having a pair of cylinder banks disposed at a V angle to each other, said cylinder banks each having a cam cover associated therewith with the upper surfaces of said cam covers lying at acute angles to a horizontal plane perpendicular to a vertical plane bisecting the V angle between said cylinder banks, a pair of plenum chambers each extending along the upper surface of a respective one of said cam covers and having a lower surface extending substantially parallel to and along substantially the entire width of the upper surface of said cam covers for maintaining a low profile for said engine, and intake passages extending from said cylinders into said plenum chambers for charging said cylinders.
Dependencies are inferred from the claim text.