Marine exhaust with dual cooling
AssigneeBombardier Motor Corporation of America
InventorsGerald F. Bland, James V. Bellantonio, Gerald F. Neisen
Life of this patent
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Abstract
A watercraft (10) having two sources of (22, 32) of cooling water (28, 34) for injection cooling of hot exhaust gas (30) being conveyed through an exhaust pipe (16) upstream of muffler (54). The first water source (22) may be an active apparatus such as the engine cooling apparatus (22). The second source of water (32) may be a passive apparatus such as a Pitot tube (38) formed in the stern drive (20) of the watercraft (10). By providing two independent sources of cooling water, the probability of exhaust component failures is significantly reduced.
Claims41
A watercraft comprising:
- a hull;
- an engine disposed within the hull;
- an exhaust pipe attached to an exhaust manifold of the engine;
- a muffler attached to the exhaust pipe;
- an engine cooling apparatus;
- a first fluid connection between the engine cooling apparatus and the exhaust pipe for directing a first flow of water into the exhaust pipe upstream of the muffler;
- an auxiliary water supply;
- a second fluid connection between the auxiliary water supply and the exhaust pipe for directing a second flow of water into the exhaust pipe upstream of the muffler, wherein the second flow is passively driven and independent of the first flow.
An exhaust apparatus for a watercraft, the exhaust apparatus comprising:
- an exhaust pipe connected to an engine exhaust manifold for conveying exhaust gas away from an engine;
- a muffler attached to the exhaust pipe;
- a first supply of water connected to the exhaust pipe for providing a first flow of water into the exhaust pipe upstream of the muffler from an active apparatus;
- and
- a second supply of water connected to the exhaust pipe for providing a second flow of water into the exhaust pipe upstream of the muffler from a passive apparatus not associated with the active apparatus.
A cooling apparatus for an exhaust apparatus of a watercraft, the exhaust apparatus having an exhaust pipe connected on an upstream side to an exhaust manifold of an engine of the watercraft and connected on a downstream side to a muffler, the cooling apparatus comprising:
- a first supply of water having an outlet connected to the exhaust pipe proximate the upstream side and driven by an active apparatus;
- and
- a second supply of water having an outlet connected to the exhaust pipe proximate the upstream side, and driven by a passive apparatus, independent of the active apparatus.
A cooling apparatus for a watercraft, the cooling apparatus comprising:
- a first means for directing water through an engine of the watercraft and into an exhaust pipe;
- and
- a second means, independent of the first means, for directing water from an exterior of the watercraft directly into the exhaust pipe upstream of a muffler.
A method of cooling an exhaust apparatus of a watercraft, the watercraft having an engine cooling apparatus, the method comprising the steps of:
- directing a first flow of water from the engine cooling apparatus into the exhaust apparatus upstream of a muffler;
- and
- directing a second flow of water from a water source other than the engine cooling apparatus into the exhaust apparatus upstream of the muffler.
A method of cooling an exhaust pipe and muffler of a watercraft, the watercraft having an engine cooling apparatus, the method comprising the steps of:
- directing a first flow of water from the engine cooling apparatus into the exhaust pipe upstream of the muffler;
- and
- providing a passive apparatus operable to provide a second flow of water when the watercraft is moving through a body of water;
- and
- connecting the passive apparatus to the exhaust pipe upstream of the muffler.
A kit for an exhaust apparatus of a watercraft, the watercraft having an engine cooling apparatus, the kit comprising:
- an insert adapted to be installed in the exhaust apparatus of the watercraft, the insert comprising a first opening adapted for connection to an active engine cooling apparatus and a second opening for connection to a second supply of water;
- and
- passive means for supplying the second supply of water when the watercraft is moving through a body of water, connected to the second opening of the insert.
A watercraft comprising:
- a hull;
- an engine disposed within the hull;
- an exhaust pipe attached to an exhaust manifold of the engine;
- an engine cooling apparatus including a first fluid connection between the engine cooling apparatus and the exhaust pipe for directing a first flow of water into the exhaust pipe, the first flow of water driven by an active apparatus;
- and
- a second fluid connection between a supply of water exterior to the hull and the exhaust pipe for directing a second flow of water into the exhaust pipe, the second flow of water driven by a passive apparatus and is independent of the first flow of water.
Dependencies are inferred from the claim text.