Throttle apparatus

Internal-combustion engines – Engine speed regulator – Specific throttle valve structure

Reexamination Certificate

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Details

C123S339230, C123S585000, C123S590000

Reexamination Certificate

active

06843224

ABSTRACT:
Air induction noise of a throttle apparatus caused by interference between flowing air and an opening for a bypass passage is reduced because a protrusion formed on an interior surface of the throttle apparatus changes aerodynamic features of the throttle apparatus.

REFERENCES:
patent: 4966122 (1990-10-01), Frinzel
patent: 5947082 (1999-09-01), Choi et al.
patent: 5970963 (1999-10-01), Nakase et al.
patent: 6041754 (2000-03-01), Mori et al.
patent: 6196187 (2001-03-01), Zubeck et al.
patent: 6539917 (2003-04-01), Shaw et al.
patent: 02-223662 (1990-09-01), None

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