Power plants – Internal combustion engine with treatment or handling of... – Pulsed – timed – tuned or resonating exhaust
Patent
1996-10-02
1998-03-24
McMahon, Marguerite
Power plants
Internal combustion engine with treatment or handling of...
Pulsed, timed, tuned or resonating exhaust
F02B 2702
Patent
active
057299749
ABSTRACT:
An exhaust system for a "V"-type engine having front and rear banks of cylinders each containing two cylinders is disclosed. The exhaust system includes a pair of cylinder heads and exhaust pipes connected thereto. Each cylinder head has two exhaust ports corresponding to the two cylinders of that bank. The exhaust ports in the front cylinder head face forwardly and lie in planes which intersect one another along a line offset to the right of a centerline of the cylinder head. Similarly, the exhaust ports in the rear cylinder head face rearwardly and lie in planes which intersect one another along a line offset to the left of a centerline of the head. Each offset is preferably equal to half of the distance between planes containing the front and rear camshaft timing chains. An exhaust pipe extends outwardly from each exhaust port in the front cylinder head, bending inwardly and downwardly and extending to the rear of the motorcycle. An exhaust pipe extends from each exhaust port in the rear cylinder head, these pipes directed to the rear of the motorcycle beyond the front exhaust pipes.
REFERENCES:
patent: Re31724 (1984-11-01), Isaka
patent: 3453824 (1969-07-01), Biesecker
patent: 4522282 (1985-06-01), Yamamoto
patent: 4763052 (1988-08-01), Shinozake et al.
patent: 4831823 (1989-05-01), Ueda
patent: 4903483 (1990-02-01), Atsuumi et al.
patent: 4939898 (1990-07-01), Ichimura et al.
McMahon Marguerite
Yamaha Hatsudoki Kabushiki Kaisha
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