Exhaust system tuned for performance with shared wall

Details Exhaust system tuned for performance with shared wall Exhaust system tuned for performance with shared wall

1998-03-16

2000-10-24

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

Pulsed, timed, tuned or resonating exhaust

60313, 60314, 60322, 60324, 181228, F01N 700

Patent

active

061348856

ABSTRACT:
An exhaust pipe for an internal combustion engine has non-circular passages that extend from the engine exhaust port to the atmosphere. The performance of the engine is not impaired by the non-circular passages compared with prior pipes having circular passages of the same cross sectional areas at corresponding locations along the pipes. The non-circular cross section enables two or more passages to be located inside a single outer wall. Plates inside the outer wall divide the outer wall interior into the separate passages. Adjacent passages thus share a wall. The exhaust pipe includes headers that conduct exhaust gasses directly from the engine to the associated passages. In a modification of the invention, an exhaust pipe is tuned for performance at two different engine operating speeds by tuning a passage on one side of a shared wall differently than another passage on the other side of a shared wall.

REFERENCES:
patent: 3453824 (1969-07-01), Biesecker
patent: 3786791 (1974-01-01), Richardson
patent: 4912930 (1990-04-01), Ueda
patent: 5044159 (1991-09-01), Landfahrer et al.
patent: 5216883 (1993-06-01), Flugger
Gordon P. Blair, The Basic Design of Two-Stroke Engines, 1990, pp. 67, 277, 278.
Gordon P. Blair, Design and Simulation of Two-Stroke Engines, 1996, pp. 125, 372.

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