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US 6,644,024 B1Granted
Exhaust system for a marine engine
AssigneeBrunswick Corporation
InventorsLoren T. Powers, James M. Horak
Life of this patent
Estimating the term…
Abstract
An exhaust system for a marine engine provides individual exhaust gas conduits that are maintained separately from water conduits until the individual exhaust gas conduits can be combined within a common exhaust gas conduit. This combination of exhaust gas streams allows the amplitude of negative pressure pulses to be damped, by combination with each other, prior to the mixing of cooling water with the exhaust gas streams. Later, the combined exhaust gas stream can be mixed with a combined water stream.
Claims20
An exhaust system for a marine engine, comprising:
- a water cavity disposed in thermal communication with a heat producing component of said marine engine;
- a first exhaust gas producing component of said engine;
- a second exhaust gas producing component of said engine;
- a first exhaust gas conduit connected in fluid communication with said first exhaust gas producing component of said marine engine;
- a second exhaust gas conduit connected in fluid communication with said second exhaust gas producing component of said marine engine;
- a first water conduit connected in fluid communication with said water cavity;
- a second water conduit connected in fluid communication with said water cavity;
- a first junction point at which said first and second exhaust gas conduits are connected in fluid communication with each other to form a third exhaust gas conduit;
- and
- a second junction point at which said third exhaust gas conduit is connected in fluid communication with a water conduit from the group consisting of said first water conduit, second water conduit, and said first water conduit combined with said second water conduit said first junction point being upstream from said second junction point with respect to the direction of flow of exhaust gas through said first and second exhaust gas conduits and with respect to the direction of flow of water through said first and second water conduits.
7 more elements
A method for controlling the flow of exhaust in an exhaust system of a marine engine, comprising the steps of:
- conducting a first stream of exhaust gas from a first exhaust gas producing component of said marine engine to a first junction point;
- conducting a second stream of exhaust gas from a second exhaust gas producing component of said marine engine to said first junction point;
- mixing said first and second streams of exhaust gas together at said first junction point to form a combined stream of exhaust gas;
- conducting a first stream of water from a water cavity of said marine engine to a second junction point, said first stream of water being disposed in thermal communication with said first stream of exhaust gas;
- conducting a second stream of water from said water cavity of said marine engine to said second junction point, said second stream of water being disposed in thermal communication with said second stream of exhaust gas;
- and
- mixing said combined stream of exhaust gas, at said second junction point, with a stream of water selected from the group consisting of said first stream of water, said second stream of water, and a combination of said first and second streams of water, said first junction point being upstream from said second junction point with respect to the direction of flow of exhaust gas through said first and second exhaust gas conduits and with respect to the direction of flow of water through said first and second water conduits.
4 more elements
An exhaust system for a marine engine, comprising:
- means for conducting a first stream of exhaust gas from a first exhaust gas producing component of said marine engine to a first junction point;
- means for conducting a second stream of exhaust gas from a second exhaust gas producing component of said marine engine to said first junction point;
- means for mixing said first and second streams of exhaust gas together at said first junction point to form a combined stream of exhaust gas;
- means for conducting a first stream of water from a water cavity of said marine engine to a second junction point, said first stream of water being disposed in thermal communication with said first stream of exhaust gas;
- means for conducting a second stream of water from said water cavity of said marine engine to said second junction point, said second stream of water being disposed in thermal communication with said second stream of exhaust gas;
- and
- means for mixing said combined stream of exhaust gas, at said second junction point, with a stream of water selected from the group consisting of said first stream of water, said second stream of water, and a combination of said first and second streams of water, said first junction point being upstream from said second junction point with respect to the direction of flow of exhaust gas through said first and second exhaust gas conduits and with respect to the direction of flow of water through said first and second water conduits.
4 more elements
Dependencies are inferred from the claim text.