Inoac Corporation

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Katsuhiro Tange

Takashi Yamaguchi

Yusuke Hoshikawa

Kyosuke Nonoyama

Naokuni Hayakawa

Haruki Kato

Hiroki Sugimoto

A noise reflector configured to reduce engine sound passing below a side member of a vehicle and leaking laterally from the vehicle. The noise reflector is disposed on a lower side of a lower surface of the side member, has a sound reflective surface tilted from a vertical direction to be directed downward as being gradually laterally distant from an engine, and is configured to reflect downward engine sound received by the sound reflective surface and cause the engine sound thus reflected to interfere with engine sound passing below the side member.

Noise reflector, fender liner, and silencing method

An engine intake air ducthas an intake portionthat extends along a first center line A, and a main duct portionthat extends along a second center line B. The main duct portionhas a merging portion, a discharge opening, and an extending portionthat extends from the merging portiontowards an opposite end to the discharge opening. A reflecting wallis provided at an end face of the extending portion. The intake portionmerges with the main duct portionin such a way that the first center line A is directed towards a downstream end of the main duct portion

Engine intake air duct

A noise attenuator which can reduce time and cost for installation thereof as compared with the conventional configuration and a vehicle air intake duct provided with the noise attenuator are provided. The noise attenuator includes a pair of circular through holes formed through a duct wall, a pair of wave transmitting/receiving membrane which are stretched so as to close the circular through holes, and a seesaw member which connects between central portions of the paired transmitting/receiving membranes. Accordingly, when one of the membranes receives a sound wave of noise thereby to be vibrated at a predetermined frequency, the other membrane follows it and is also vibrated while shifted by a half cycle. As a result, a cancellation wave with a phase opposite to the sound wave received by the one membrane is transmitted from the other membrane, whereupon the noise can be attenuated.

Noise attenuator and vehicle air intake duct provided therewith

Growing community of inventors

Inazawa, Japan

Katsuhiro Tange