Air cooled marine engine exhaust
AssigneeBombardier Motor Corporation of America
InventorGerald F. Neisen
Life of this patent
Estimating the term…
Abstract
A marine propulsion device (12) including a sleeve (32) formed around an exhaust conduit (26) to form an air cooling passage (34) there between. Cooling air (38) is moved through the cooling passage (34) by an active fan (42) and/or a passive venturi (56). Cooling air (38) is drawn from within an engine compartment (24) for a predetermined time before and after the engine (16) is operated. A water-cooled discharge support (70) is located above the waterline (28), thereby preventing the intermixing of exhaust gasses (36) with the environmental water (27).
Claims60
An exhaust apparatus for a marine engine having an exhaust port, the exhaust apparatus comprising:
- an exhaust conduit having an inlet end connected to the exhaust port and having a discharge end;
- a first sleeve disposed around a portion of the exhaust conduit forming a first cooling passage there between;
- a gas moving apparatus in fluid communication with the first cooling passage;
- a second sleeve disposed around another portion of the exhaust conduit forming a second cooling passage;
- and
- a water circulation system in fluid communication with the second cooling passage.
A method of cooling the exhaust conduit of a marine engine, the method comprising the steps of:
- disposing a sleeve around a first portion of the exhaust conduit to form a cooling passage therebetween;
- moving a gas through the cooling passage;
- and
- wherein the step of moving gas through the cooling passage comprises moving gas through the cooling passage until a temperature measurement reaches a predetermined value.
A method of operating a marine engine, the engine having an exhaust conduit at least partially enclosed by a sleeve forming a cooling passage there between, the method comprising the steps of:
- starting the engine;
- moving gas through the cooling passage while the engine is operating;
- and
- continuing to move gas through the cooling passage after the engine is stopped.
An internal combustion engine having an exhaust port, the engine comprising:
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around at least a portion of the exhaust conduit and forming a heat transfer passage there between;
- a fluid convector which circulates one of air and water through the heat transfer passage, said fluid convector operable to circulate a fluid other than water through at least a portion of the heat transfer passage said fluid convector including a turbocharger powered by exhaust from the internal combustion engine;
- and
- wherein the engine is used for marine propulsion through a body of water having a waterline and wherein the exhaust conduit conveys exhaust above the waterline.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- a means for moving a cooling gas through the cooling passage;
- and
- a means for passing cooling gas through the cooling passage during at least one of:
- prior to startup of the internal combustion engine;
- and
- after shutdown of the internal combustion engine.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- a turbocharger powered by exhaust from the internal combustion engine and connected to move cooling gas through the cooling passage.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- and
- a check valve connected to move cooling gas through the cooling passage.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- a means for moving a cooling gas through the cooling passage;
- and
- an indicator operable to display a warning when a flow of cooling gas is interrupted.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- a means for moving a cooling gas through the cooling passage;
- a water jacket formed around a second portion of the exhaust conduit forming a water cooling passage there between;
- and
- a means for moving water through the water cooling passage.
A marine propulsion device comprising:
- an internal combustion engine having an exhaust port;
- an exhaust conduit connected to the exhaust port;
- a sleeve disposed around a first portion of the exhaust conduit forming a cooling passage there between;
- a means for moving a cooling gas through the cooling passage;
- and
- a water-cooled support attached to a discharge end of the exhaust conduit.
An exhaust apparatus for a marine engine having an exhaust port, the exhaust apparatus comprising:
- an exhaust conduit having an inlet end connected to the exhaust port and having a discharge;
- a sleeve disposed around a portion of the exhaust conduit forming a first cooling passage there between;
- a gas moving apparatus in fluid communication with the cooling passage;
- and
- a check valve connected between the gas moving apparatus and the cooling passage.
A method of cooling the exhaust conduit of a marine engine, the method comprising the steps of:
- disposing a sleeve around a first portion of the exhaust conduit to form a cooling passage there between;
- and
- moving a gas through the cooling passage until a temperature measurement reaches a predetermined value.
Dependencies are inferred from the claim text.