Marine engine exhaust system with diverter valve and alternate e

Details Marine engine exhaust system with diverter valve and alternate e Marine engine exhaust system with diverter valve and alternate e

1989-03-13

1990-04-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Pulsed, timed, tuned or resonating exhaust

440 89, F02B 2702

Patent

active

049149113

ABSTRACT:
An internal combustion engine is provided with an exhaust discharge system providing merging exhaust paths for discharging exhaust from individual cylinders into an exhaust cavity. A diverter valve is provided for selectively preventing merger of the exhaust from the individual cylinders prior to discharge, and an exhaust passage receives such diverted exhaust for discharge into the exhaust cavity. The diverter valve operates to divert exhaust at low speed operation, which provides satisfactory low speed exhaust tuning. The diverter valve is closed at high speed operation to allow the exhaust from the individual cylinders to merge prior to discharge, which provides satisfactory high speed exhaust tuning. The invention provides satisfactory exhaust tuning at both high speed and low speed operation, which heretofore had not been possible, to increase overall engine performance and power.

REFERENCES:
patent: 3788284 (1974-01-01), Gardner
patent: 3796546 (1974-03-01), Poullot
patent: 3813880 (1974-06-01), Reid et al.
patent: 3908366 (1975-09-01), Masaki
patent: 3943710 (1976-03-01), Lange
patent: 4287716 (1981-09-01), Schuster
patent: 4484442 (1984-11-01), Hale
patent: 4668199 (1987-05-01), Freund et al.
patent: 4766854 (1988-08-01), Riese
patent: 4773215 (1988-09-01), Winberg et al.

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