US6358109B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled marine engine exhaust
Assignee: Bombardier Recreational Products Inc
•
Filing: 1999-12-08
•
Granted: 2002-03-19
•
Expires: 2019-12-08
Abstract
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 ).
Inventors
- 👤 Gerald F. Neisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:45
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/004; B; B63; B63H; B63H21/00; B63H21/32; F01N13/009; F01N3/00; F01N3/02; F01N3/04; F01N3/043; F01N3/05; F01P; F01P5/00; F01P5/02; F01P5/08; F01N13/08; F01N2590/00; F01N2590/02; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01P2050/00; F01P2050/02; F01P2050/04; F01P2050/08; F01P2060/00; F01P2060/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 72
Claim 1
Independent Claim
91 words
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.
Claim 2
Dependent Claim
91 words
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.
Claim 3
Dependent Claim
40 words
The exhaust apparatus of claim 1 , further comprising: a water jacket disposed around a second portion of the exhaust conduit forming a water cooling passage there between; and a water pump in fluid communication with the water cooling passage.
Claim 4
Dependent Claim
26 words
The exhaust apparatus of claim 1 , further comprising an opening in the exhaust conduit proximate the discharge end in fluid communication with the cooling passage.
Claim 5
Dependent Claim
32 words
The exhaust apparatus of claim 3 , wherein the opening is formed in the exhaust conduit at a point of reduced exhaust pressure associated with a venturi formed in the exhaust conduit.
Claim 6
Dependent Claim
21 words
The exhaust apparatus of claim 1 , further comprising a water-cooled support attached to the discharge end of the exhaust conduit.
Claim 7
Dependent Claim
25 words
The exhaust apparatus of claim 1 , wherein the discharge end of the exhaust conduit is disposed on a boat transom above a water level.
Claim 8
Dependent Claim
26 words
The exhaust apparatus of claim 1 , wherein the exhaust conduit further comprises a muffler, and wherein the sleeve comprises a portion disposed around the muffler.
Claim 9
Dependent Claim
28 words
The exhaust apparatus of claim 1 , wherein the exhaust conduit further comprises a catalytic converter, and wherein the sleeve comprises a portion disposed around the catalytic converter.
Claim 10
Dependent Claim
19 words
The exhaust apparatus of claim 1 further comprising a check valve connected between a fan and the cooling passage.
Claim 11
Independent Claim
67 words
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.
Claim 12
Independent Claim
67 words
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.
Claim 13
Dependent Claim
34 words
The method of claim 10 further comprising: disposing a water jacket around a second portion of the exhaust conduit to form a water cooling passage therebetween; and moving water through the water cooling passage.
Claim 14
Dependent Claim
31 words
The method of claim 10 further comprising the steps of: forming an opening in the exhaust conduit in fluid communication with the cooling passage; and moving the gas through the opening.
Claim 15
Dependent Claim
43 words
The method of claim 12 , further comprising the steps of: forming a venturi in the exhaust conduit; and wherein the step of forming an opening comprises forming the opening in a low exhaust pressure area of the conduit associated with the venturi.
Claim 16
Dependent Claim
22 words
The method of claim 10 further comprising the step of supporting a discharge end of the exhaust conduit with a water-cooled support.
Claim 17
Dependent Claim
25 words
The method of claim 10 wherein the step of moving gas through the cooling passage comprises drawing air from within a compartment surrounding the engine.
Claim 18
Dependent Claim
25 words
The method of claim 15 , further comprising drawing air from within the compartment for a predetermined period of time prior to starting the engine.
Claim 19
Dependent Claim
24 words
The method of claim 16 , further comprising drawing air from within the compartment for a predetermined period of time after stopping the engine.
Claim 20
Dependent Claim
23 words
The method of claim 10 wherein the step of moving a gas through the cooling passage comprises moving air through the cooling passage.
Claim 21
Independent Claim
60 words
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.
Claim 22
Independent Claim
60 words
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.
Claim 23
Dependent Claim
27 words
The method of claim 19 , further comprising the step of moving gas through the cooling passage for a predetermined period of time before starting the engine.
Claim 24
Dependent Claim
29 words
The method of claim 19 further comprising the step of continuing to move gas through the cooling passage for a predetermined period of time after the engine is stopped.
Claim 25
Dependent Claim
27 words
The method of claim 19 further comprising the step of continuing to move gas through the cooling passage until a temperature measurement has reached a predetermined value.
Claim 26
Dependent Claim
34 words
The method of claim 19 , wherein the step of moving gas through the cooling passage comprises drawing air from within a compartment surrounding the engine and moving the air through the cooling passage.
Claim 27
Dependent Claim
29 words
The method of claim 19 , wherein the step of moving a gas through the cooling passage while the engine is operating comprises moving air through the cooling passage.
Claim 28
Dependent Claim
116 words
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.
Claim 29
Dependent Claim
116 words
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.
Claim 30
Dependent Claim
13 words
The internal combustion engine of claim 25 , wherein the fluid is air.
Claim 31
Dependent Claim
39 words
The internal combustion engine of claim 25 , wherein the fluid convector comprises: a venturi formed in the exhaust conduit; and an opening formed in the exhaust conduit at a point of reduced exhaust pressure associated with the venturi.
Claim 32
Dependent Claim
12 words
The internal combustion engine of claim 25 wherein the fluid is water.
Claim 33
Dependent Claim
22 words
The internal combustion engine of claim 25 wherein the fluid convector is a means for moving water through the heat transfer passage.
Claim 34
Dependent Claim
73 words
The internal combustion engine of claim 25 wherein the heat transfer passage includes a first portion and a second portion, the first portion having air as a first heat transfer fluid and the second portion having water as a second heat transfer fluid, and further wherein there is a first fluid convector for conveying air through the first portion and there is a second fluid convector for conveying water through the second portion.
Claim 35
Dependent Claim
81 words
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.
Claim 36
Dependent Claim
81 words
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.
Claim 37
Dependent Claim
53 words
The marine propulsion device of claim 31 wherein the means for moving a cooling gas comprises at least one of: a fan driven by an electric motor; a fan driven by the internal combustion engine; a turbocharger powered by exhaust from the internal combustion engine; and a venturi formed in the exhaust conduit.
Claim 38
Dependent Claim
69 words
The marine propulsion device of claim 31 further comprising: a water jacket formed around a second portion of the exhaust conduit forming a water cooling passage there between; a means for moving water through the water cooling passage; a flange connection between the sleeve and the water jacket; and a fluid connection formed through a flange connection between the means for moving a cooling gas and the cooling passage.
Claim 39
Dependent Claim
21 words
The marine propulsion device of claim 31 further comprising a water-cooled support attached to a discharge end of the exhaust conduit.
Claim 40
Dependent Claim
41 words
The marine propulsion device of claim 31 wherein the means for passing cooling gas includes at least one of: a timer connected to the means for passing cooling gas; and a temperature sensor connected to the means for passing cooling gas.
Claim 41
Dependent Claim
25 words
The marine propulsion device of claim 31 wherein a discharge end of the exhaust conduit is disposed on a boat transom above a water level.
Claim 42
Dependent Claim
58 words
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.
Claim 43
Dependent Claim
58 words
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.
Claim 44
Dependent Claim
51 words
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.
Claim 45
Dependent Claim
51 words
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.
Claim 46
Dependent Claim
65 words
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.
Claim 47
Dependent Claim
65 words
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.
Claim 48
Dependent Claim
24 words
The marine propulsion device of claim 39 , wherein the means for moving a cooling gas comprises a fan driven by an electric motor.
Claim 49
Dependent Claim
25 words
The marine propulsion device of claim 39 , wherein the means for moving a cooling gas comprises a fan driver by the internal combustion engine.
Claim 50
Dependent Claim
79 words
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.
Claim 51
Dependent Claim
79 words
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.
Claim 52
Dependent Claim
43 words
The marine propulsion device of claim 42 , wherein the means for moving a cooling gas comprises: a venturi formed in the exhaust conduit; and an opening formed in the exhaust conduit at a point of reduced exhaust pressure associated with the venturi.
Claim 53
Dependent Claim
64 words
The marine propulsion device of claim 42 wherein the exhaust conduit comprises an inlet end attached to the internal combustion engine and a discharge end; wherein the cooling passage comprises an inlet end connected to the means for moving a cooling gas and an outlet end; and wherein the cooling passage outlet end comprises an opening in the exhaust conduit proximate the discharge end.
Claim 54
Dependent Claim
40 words
The marine propulsion device of claim 42 further comprising: a flange connection between the sleeve and the water jacket; and a fluid connection formed through a flange connection between the means for moving a cooling gas and the cooling passage.
Claim 55
Dependent Claim
62 words
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.
Claim 56
Dependent Claim
62 words
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.
Claim 57
Dependent Claim
33 words
The marine propulsion device of claim 46 wherein the internal combustion engine is positioned within a compartment, and wherein the means for moving a cooling gas comprises an inlet disposed within the compartment.
Claim 58
Dependent Claim
26 words
The marine propulsion device of claim 46 wherein the exhaust conduit further comprises a muffler, and wherein the sleeve comprises a portion disposed round the muffler.
Claim 59
Dependent Claim
28 words
The marine propulsion device of claim 46 wherein the exhaust conduit further comprises a catalytic converter, and wherein the sleeve comprises a portion disposed around the catalytic converter.
Claim 60
Dependent Claim
19 words
The marine propulsion device of claim 46 wherein the means for moving a cooling gas comprises a passive device.
Claim 61
Dependent Claim
23 words
The marine propulsion device of claim 46 wherein the means for moving a cooling gas comprises a passive device and an active device.
Claim 62
Dependent Claim
25 words
The marine propulsion device of claim 46 wherein a discharge end of the exhaust conduit is disposed on a boat transom above a water level.
Claim 63
Dependent Claim
73 words
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.
Claim 64
Dependent Claim
73 words
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.
Claim 65
Independent Claim
51 words
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.
Claim 66
Independent Claim
51 words
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.
Claim 67
Dependent Claim
38 words
The method of claim 54 further comprising the steps of: disposing a water jacket around a second portion of the exhaust conduit to form a water cooling passage there between; and moving water through the water cooling passage.
Claim 68
Dependent Claim
31 words
The method of claim 54 further comprising the steps of: forming an opening in the exhaust conduit in fluid communication with the cooling passage; and moving the gas through the opening.
Claim 69
Dependent Claim
42 words
The method of claim 54 further comprising the steps of: forming a venturi in the exhaust conduit; and wherein the step of forming an opening comprises forming the opening in a low exhaust pressure area of the conduit associated with the venturi.
Claim 70
Dependent Claim
22 words
The method of claim 54 further comprising the step of supporting a discharge end of the exhaust conduit with a water-cooled support.
Claim 71
Dependent Claim
59 words
The method of claim 54 further 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 by drawing air from within a compartment surrounding the engine for at least a predetermined period of time prior to starting the engine.
Claim 72
Dependent Claim
26 words
The method of claim 59 further comprising the step of drawing air from within the compartment for a predetermined period of time after stopping the engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-03-18 | 2005-09-17 | 2006-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-18 | 2009-09-17 | 2010-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-03-18 | 2013-09-17 | 2014-03-19 | $7700.00 | Window Closed / Lapsed |