Patent ID: 8322486
Filing Date: 2012-12-04
Classification: F02M

Abstract:
1. An intake sound generation apparatus for an internal combustion engine, the internal combustion engine including an intake system including an intake passage, the intake sound generation apparatus comprising: an introduction duct connected to the intake passage and introducing intake pulsation in the intake system thereinto; a vibration member including a diaphragm portion which is vibrated by the intake pulsation, and a bellows portion configured to promote vibration of the diaphragm portion, the vibration member being so disposed as to cover one end of the introduction duct, and a resonance duct having one end connected to the introduction duct through the vibration member and the other end opened to an outside of the intake sound generation apparatus, the resonance duct acting to increase and emit a sound pressure of intake sound produced by vibration of the vibration member, wherein a central axis of the introduction duct and a central axis of the resonance duct are located offset in directions opposite to each other, and both the central axis of the introduction duct and the central axis of the resonance duct are located offset to a central axis of the vibration member.