Exhaust gas cleaning device for outboard motor

Details Exhaust gas cleaning device for outboard motor Exhaust gas cleaning device for outboard motor

1993-02-26

1994-09-13

Basinger, Sherman

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

60302, F01N 328

Patent

active

053464176

ABSTRACT:
A number of embodiments of outboard motors having catalytic exhaust systems. In each embodiment, an expansion chamber is formed in the drive shaft housing and the exhaust gases are delivered to the expansion chamber from an exhaust pipe that extends at least in part through the expansion chamber and which terminates at its lower end in the lower portion of the expansion chamber. A catalyst bed is positioned at the upper end of the expansion chamber and beneath the engine and through which the exhaust gases must pass for discharge through a further exhaust conduit which extends at least in part through the expansion chamber and which terminates at an underwater exhaust gas discharge. Embodiments are depicted with banks of cylinders having exhaust manifolds that are disposed either adjacent each other, in which case the catalyst bed is comprised of two portions disposed transversely outwardly of the exhaust pipes or wherein the exhaust pipes are spaced from each other and the catalyst bed is comprised of two portions disposed transversely from each other and between the exhaust pipes. An embodiment is also shown having an exhaust pipe with a catalyst bed that surrounds it.

REFERENCES:
patent: 3500805 (1970-03-01), Reisacher
patent: 3692006 (1972-09-01), Miller et al.
patent: 3967446 (1976-07-01), Harralson et al.
patent: 5174112 (1992-12-01), Sougawa et al.

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