초록 ▼

A number of embodiments of induction systems for watercraft that employ, in addition to the plenum chamber of the air inlet device for the induction system, a further plenum chamber of a predetermined volume that communicates with the induction system plenum chamber for providing silencing and/or tu

A number of embodiments of induction systems for watercraft that employ, in addition to the plenum chamber of the air inlet device for the induction system, a further plenum chamber of a predetermined volume that communicates with the induction system plenum chamber for providing silencing and/or tuning effects to improve induction efficiency and silencing. In addition there are disclosed compact intake devices that incorporate plenum chambers for this purpose.

대표청구항 ▼

[ What is claimed is:] [1.]1. A watercraft comprised of a hull defining an engine compartment, an internal combustion engine having at least one combustion chamber supported within said engine compartment, a propulsion device supported by said hull and driven by said engine for propelling said hull,

[ What is claimed is:] [1.]1. A watercraft comprised of a hull defining an engine compartment, an internal combustion engine having at least one combustion chamber supported within said engine compartment, a propulsion device supported by said hull and driven by said engine for propelling said hull, said engine comprising an induction system comprising means defining a plenum chamber of a first predetermined volume, an atmospheric air intake to said plenum chamber having an inlet opening for drawing air from within said engine compartment, and an outlet opening communicating with said plenum chamber for delivering the drawn air directly to said plenum chamber, a second chamber having a predetermined volume, and communicating means for communicating said second chamber with said plenum chamber.