Induction system for engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsYoshiharu Isaka, Masahiro Ito
Life of this patent
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Abstract
Several embodiments of induction systems for internal combustion engines wherein the effective shape of the intake passage may be changed during engine running conditions to achieve turbulence of the desired type in the combustion chamber and improve volumetric efficiency at low and mid range performance and provide a substantially uninterrupted introduction of charge under high speed running so as to improve the performance throughout the entire engine load and speed ranges. Also, a control valve arrangement is provided in the exhaust system for improving performance under low engine speeds and low engine loads.
Claims55
An intake arrangement for an internal combustion engine having a combustion chamber, an intake passage having an inlet opening for receiving an intake charge and an outlet opening for delivering a charge, a first portion of said intake passage between said inlet opening toward said outlet opening defining a generally straight section and terminating at a second angularly related portion leading to said outlet opening, and means for changing the effective angle of said straight section to said outlet opening and the shape of the transition between said straight section and said second portions without introducing any void areas during the running of said engine for redirecting the charge flow passing through said outlet opening.
An intake arrangement for an internal combustion engine having a combustion chamber, an intake passage having an inlet opening for receiving an intake charge and an outlet opening for delivering a charge, the portion of said intake passage between said inlet opening and said outlet opening defining a generally straight section leading to said outlet opening, and means for changing the effective angle of said straight section to said outlet opening during the running of said engine for redirecting the charge flow passing through said outlet opening, comprising a rotating member rotatable about an axis substantially parallel to the flow axis of the straight section.
An intake arrangement for an internal combustion engine having a cylinder head forming in part a combustion chamber, an intake passage in said cylinder head having an inlet opening for receiving an intake charge and an outlet opening for deliverying a charge to the combustion chamber, the portion of said intake passage between said inlet opening and said outlet opening defining a generally straight section leading to said outlet opening, a recess in a portion of said cylinder head forming said straight section and means for changing the effective angle of said straight section to said outlet opening during the running of said engine for redirecting the charge flow passing through said outlet opening, said means for changing the angle of said straight section comprises a movable wall contained at least in part in said recess and defining the induction passage in all positions of said movable wall.
An intake arrangement for an internal combustion engine having a cylinder head defining in part a combustion chamber, a pair of intake passages each having an inlet opening for receiving an intake charge and an outlet opening for deliverying a charge to the combustion chamber formed in said cylinder head, the portion of said intake passages between said inlet openings and said outlet openings defining generally straight sections leading to said outlet openings, and means for changing the effective angle of said straight sections to said outlet openings during the running of said engine for redirecting the charge flow passing through said outlet openings and to direct the flow toward the center of said combustion chamber.
An intake arrangement for an internal combustion engine having a combustion chamber, an intake passage having an inlet opening for receiving an intake charge and an outlet opening for deliverying a charge, the portion of said intake passage between said inlet opening and said outlet opening defining a generally straight section leading to said outlet opening, means for changing the effective angle of said straight section to said outlet opening during the running of said engine for redirecting the charge flow passing through said outlet opening, and a rectifier plate affixed adjacent said outlet opening and dividing said flow passage into first and second portions, said means for changing the effective angle of said straight section being effective to cooperate with said rectifier plate so as to direct flow only through one of said portions when the means for changing the angle is in one position.
An intake arrangement for an internal combustion engine having a combustion chamber, an intake passage having an inlet opening for receiving an intake charge and an outlet opening for deliverying the charge, wall means defining the portion of the intake passage between said inlet opening and said outlet opening for directing the flow from said inlet opening to said outlet opening, and means for changing the effective shape of said wall means while maintaining continuity of said wall means between said inlet opening and said outlet opening for redirecting the charge flow passing through said outlet opening.
Dependencies are inferred from the claim text.