Tuned exhaust manifold

Details Tuned exhaust manifold Tuned exhaust manifold

1986-06-13

1987-09-01

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Pulsed, timed, tuned or resonating exhaust

29157R, 29428, 29463, 60323, F02B 2702, F01N 710

Patent

active

046899529

ABSTRACT:
A tuned exhaust manifold is provided for attachment to an engine having a plurality of exhaust ports. The manifold includes an inner and outer shell joined together to form an exhaust chamber and an inwardly-opening flange-receiving space at a split line defined by the union of the inner and outer shells. Captive tuning baffles are dropped in place and positioned in the exhaust chamber to isolate individual engine exhaust ports for engine performance tuning. Each baffle includes a flange trapped in the space between the inner and outer shells to retain the baffle in a predetermined position within the exhaust chamber. The baffles are arranged in a predetermined pattern within the exhaust manifold to define separate passgeways extending from exhaust inlet openings formed in the inner shell toward one or more exhaust openings of the manifold. Tuning is accomplished by configuring and placing the baffles to control the flow of exhaust from each engine exhaust port through the exhaust manifold. A method of assembling the captive tuning baffles between the inner and outer shells is also provided.

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