Porting system for internal combustion engine
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsToshihiko Takata, Yoshiharu Nakayama
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Abstract
An induction system for an internal combustion engine wherein each chamber of the engine is provided with three intake ports and one charge former serves two of those intake ports while another charge former serves the other intake port. The charge formers employ a staged throttle valve arrangement so that the other charge former supplies the idle and low speed requirements and the first mentioned charge former comes into operation only at high speeds and loads. In accordance with another feature, the arrangement is provided for pairs of chambers and the single charge former serves two chambers.
Claims31
In an internal combustion engine having a variable volume chamber comprising first, second and third intake passages each serving said chamber through respective first, second and third intake ports, a first charge former for supplying a fuel/air mixture to said chamber through said first and second intake passages, and a second charge former for supplying a fuel/air mixture to said chamber through said third intake passage.
An induction system for an internal combustion engine comprising first and second variable volume chambers, a first intake passage serving said first chamber through a first intake port, a second intake passage serving said second chamber through a second intake port, a third intake passage serving both of said first and second chambers through respective third and fourth intake ports, and a single charge former for supplying a fuel/air mixture to said first and second chambers through said third intake passage.
Dependencies are inferred from the claim text.