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Title:
AIR INTAKE DEVICE FOR ENGINE
Document Type and Number:
WIPO Patent Application WO/2007/029459
Kind Code:
A1
Abstract:
An air intake device for an engine, comprising a bypass (20) connected to an air intake path (2) while bypassing a throttle valve (5) and a bypass valve (V) controlling the opening of the bypass (20). The bypass valve (V) comprises a tubular valve chamber (15) having an inner part opened to the upstream side of the bypass (20) and an inner surface with a metering hole (16) opened to the downstream side of the bypass (20) and a valve element (25) slidably and non-rotatably fitted to the valve chamber (15) and opening/closing the metering hole (16). The inner surface (A) of the valve chamber (15) in which the metering hole (16) is formed and the outer surface (B1) of the valve element (25) covering the metering hole (16) so as to face the inner surface (A) are formed in a same shape so as to be fitted to each other. The other inner surface (A) of the valve chamber (15) and the other outer surface (B2) of the valve element (25) are formed so as to produce a clearance (g) therebetween. As a result, a leaked air can be prevented from flowing into the metering hole by securely fitting the valve element to the inner surface of the valve chamber in which the metering hole is formed while securing the smooth slidable movement of the valve element in the valve chamber in the bypass.

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Inventors:
AKIYAMA HIROSHIGE (JP)
SUGIMOTO TOSHIYUKI (JP)
Application Number:
PCT/JP2006/316092
Publication Date:
March 15, 2007
Filing Date:
August 16, 2006
Export Citation:
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Assignee:
KEIHIN CORP (JP)
AKIYAMA HIROSHIGE (JP)
SUGIMOTO TOSHIYUKI (JP)
International Classes:
F02M69/32
Foreign References:
JP2003074444A2003-03-12
JP2002349396A2002-12-04
JP2003074444A2003-03-12
Other References:
See also references of EP 1939443A4
Attorney, Agent or Firm:
OCHIAI, Takeshi et al. (6-3 Taito 2-chome, Taito-k, Tokyo 16, JP)
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