Exhaust device for motorcycle

Details Exhaust device for motorcycle Exhaust device for motorcycle

2007-08-29

2010-12-28

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Divider, collector, valve means, or boundary layer device...

C060S312000

Reexamination Certificate

active

07856814

ABSTRACT:
To provide an exhaust device for a motorcycle for suppressing an exhaust resistance due to the thickness of an exhaust control valve. An exhaust device for a motorcycle is provided for an engine having a plurality of cylinders. A plurality of upstream exhaust pipes are respectively connected to exhaust ports for the cylinders with an exhaust control valve provided in the downstream exhaust pipe. A separator is provided in the exhaust manifold portion for separating the flows of exhaust gas. The exhaust control valve is located on the downstream side of the separator so that a main surface of the exhaust control valve in its fully open condition becomes substantially parallel to a main surface of the separator.

REFERENCES:
patent: 3938330 (1976-02-01), Nakajima et al.
patent: 4785626 (1988-11-01), Shiraishi
patent: 4795420 (1989-01-01), Sakurai et al.
patent: 7171804 (2007-02-01), Terashima
patent: 2002/0050415 (2002-05-01), Kawamoto
patent: 2006/0242952 (2006-11-01), Muramatsu et al.
patent: 2005-83358 (2005-03-01), None

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