Engine acoustical system
AssigneeYamaha Corporation
InventorTakao Shiga
Life of this patent
Estimating the term…
Abstract
A number of embodiments of acoustical devices for improving either or both the intake and exhaust sounds emanated from an internal combustion engine. This is achieved by employing acoustical devices which are configured so as to discharge the desired sound waves to the atmosphere rather than by attempting to dampen the undesired sound waves generated in the system.
Claims21
An internal combustion engine comprised of an engine body forming at least one combustion chamber, an induction system having an atmospheric communication opening for introducing at least an air charge to said combustion chamber, an exhaust system for discharging exhaust gasses from said combustion chamber through an atmospheric communicating opening, and an acoustical device for amplifying sounds of a predetermined frequency in at least one of said induction and exhaust systems having an opening facing the atmospheric communicating opening of the system.
Dependencies are inferred from the claim text.