초록 ▼

A number of embodiments of induction systems for outboard motors wherein the induction system can be tuned to provide good performance under high low speed by utilizing two plenum chambers and a control for controlling the effective length of the intake passage serving the combustion chamber. Both i

A number of embodiments of induction systems for outboard motors wherein the induction system can be tuned to provide good performance under high low speed by utilizing two plenum chambers and a control for controlling the effective length of the intake passage serving the combustion chamber. Both inline and V-type embodiments are disclosed.

대표청구항 ▼

[ I claim:] [1.] An outboard motor comprised of a powerhead consisting of an internal combustion engine and a surrounding protective cowling, a drive shaft housing and lower unit depending from said powerhead and containing a propulsion unit driven by said engine for propelling an associated watercr

[ I claim:] [1.] An outboard motor comprised of a powerhead consisting of an internal combustion engine and a surrounding protective cowling, a drive shaft housing and lower unit depending from said powerhead and containing a propulsion unit driven by said engine for propelling an associated watercraft, an induction system for supplying at least an air charge to at least one combustion chamber of said engine, said induction system comprising first and second plenum chamber devices disposed at different distances from said combustion chamber, induction passage means communicating said plenum chamber devices with said combustion chamber, and a control valve for controlling the communication of at least one of said plenum chamber devices with said combustion chamber.