Patent US3692006A successfully refreshed from Google Patents.
US3692006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-cylinder pulse charging system
Assignee: Outboard Marine Corp
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Filing: 1970-07-13
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Granted: 1972-09-19
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Expires: 1990-07-13
Abstract
Abstract Disclosed herein is a marine propulsion device comprising an engine having at least three cylinders each with an exhaust port, means for establishing a sequential firing order for said cylinders, and exhaust gas discharge means communicating with said exhaust ports for establishing substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust port of the subsequently charged one of said cylinders. The acoustical flow distance is uniform so as to afford with respect to each firing of the engine, arrival of a compressive wave emanating from the opening of the exhaust port of one of the said cylinders at the exhaust port of the cylinder which is next charged at a time prior to closing of the last mentioned exhaust port.
Inventors
- 👤 George E Miller
- 👤 Paul A Kalb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; F02; F02B; F02B27/00; F02B27/04; F02B33/00; F02B61/00; F02B61/04; F02B61/045; F01N13/08; F01N13/10; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1812; F02B2075/1816; F02B75/22; F02M; F02M2700/00; F02M2700/33; F02M2700/331; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
318 words
An outboard motor comprising a two-stroke internal combustion engine having a first cylinder bank including a first cylinder and a second cylinder arranged parallel to and in alignment with said first cylinder and having an axis in a first plane containing the axis of said first cylinder, a second cylinder bank including a third cylinder and a fourth cylinder arranged parallel to and in alignment with said third cylinder and having an axis in a second plane containing the axis of said third cylinder, said second plane being at an angle with respect to said first plane, said cylinders each having an exhaust port, means for firing said first, second, third, and fourth cylinders in a predetermined sequential order, a lower unit including a drive shaft housing supporting said engine at the top of said housing, a part which extends, under normal operating conditions, into the water, a propeller supported by said part, and an exhaust gas pipe extending at least partially within said housing and having an upwardly open end adjacent to the top of said housing, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and communicating with said exhaust gas ports and having a downwardly open outlet communicating with said upwardly open end of said exhaust gas pipe, said exhaust gas passageway system providing substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, said acoustical flow distances having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the then being charged cylinder at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 2
Dependent Claim
318 words
An outboard motor comprising a two-stroke internal combustion engine having a first cylinder bank including a first cylinder and a second cylinder arranged parallel to and in alignment with said first cylinder and having an axis in a first plane containing the axis of said first cylinder, a second cylinder bank including a third cylinder and a fourth cylinder arranged parallel to and in alignment with said third cylinder and having an axis in a second plane containing the axis of said third cylinder, said second plane being at an angle with respect to said first plane, said cylinders each having an exhaust port, means for firing said first, second, third, and fourth cylinders in a predetermined sequential order, a lower unit including a drive shaft housing supporting said engine at the top of said housing, a part which extends, under normal operating conditions, into the water, a propeller supported by said part, and an exhaust gas pipe extending at least partially within said housing and having an upwardly open end adjacent to the top of said housing, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and communicating with said exhaust gas ports and having a downwardly open outlet communicating with said upwardly open end of said exhaust gas pipe, said exhaust gas passageway system providing substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, said acoustical flow distances having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the then being charged cylinder at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 3
Dependent Claim
23 words
An outboard motor in accordance with claim 1 wherein the angle between sAid first plane and said second plane is approximately 90* .
Claim 4
Dependent Claim
27 words
An outboard motor in accordance with claim 1 wherein said exhaust gas ports are open in the area between included angle between said first and second planes.
Claim 5
Dependent Claim
38 words
An outboard motor in accordance with claim 1 wherein said exhaust gas pipe structure includes an area of increased cross section as compared to the cross section of said pipe structure adjacent to said exhaust gas passage system.
Claim 6
Dependent Claim
310 words
An outboard motor comprising an engine having a block including a first cylinder bank having a first cylinder and a second cylinder arranged parallel to and in alignment with said first cylinder and having an axis in a first plane containing the axis of said first cylinder, a second cylinder bank including a third cylinder and a fourth cylinder arranged parallel to and in alignment with said third cylinder and having an axis in a second plane containing the axis of said third cylinder, said second plane being at an angle with respect to said first plane, said engine block also including a face extending generally perpendicularly to a line bisecting the angle between said first and second planes, and cylinders each having an exhaust port, means for firing said first, second, third, and fourth cylinders in a predetermined sequential order, a housing structure supporting said engine and including an outer housing and an exhaust gas pipe extending at least partially within said housing, and an exhaust gas passageway system communicating between each of said exhaust ports and said exhaust gas pipe, said exhaust gas passageway system providing substantially equal acoustical flow distances between each of said exhaust ports and said exhaust gas port of the subsequently fired one of said cylinders, said exhaust gas passageway system including exhaust gas passages in said engine block communicating with said exhaust ports and with said face, said passageway system further including a passage structure connected to said face of said block, having a single exhaust gas outlet communicating with said exhaust gas pipe and located in a surface in a plane at a substantial angle to said face of said block, and internal passageways communicating between said outlet and each of said gas passages such that the acoustical flow path from said outlet to each of said exhaust ports is approximately equal.
Claim 7
Dependent Claim
310 words
An outboard motor comprising an engine having a block including a first cylinder bank having a first cylinder and a second cylinder arranged parallel to and in alignment with said first cylinder and having an axis in a first plane containing the axis of said first cylinder, a second cylinder bank including a third cylinder and a fourth cylinder arranged parallel to and in alignment with said third cylinder and having an axis in a second plane containing the axis of said third cylinder, said second plane being at an angle with respect to said first plane, said engine block also including a face extending generally perpendicularly to a line bisecting the angle between said first and second planes, and cylinders each having an exhaust port, means for firing said first, second, third, and fourth cylinders in a predetermined sequential order, a housing structure supporting said engine and including an outer housing and an exhaust gas pipe extending at least partially within said housing, and an exhaust gas passageway system communicating between each of said exhaust ports and said exhaust gas pipe, said exhaust gas passageway system providing substantially equal acoustical flow distances between each of said exhaust ports and said exhaust gas port of the subsequently fired one of said cylinders, said exhaust gas passageway system including exhaust gas passages in said engine block communicating with said exhaust ports and with said face, said passageway system further including a passage structure connected to said face of said block, having a single exhaust gas outlet communicating with said exhaust gas pipe and located in a surface in a plane at a substantial angle to said face of said block, and internal passageways communicating between said outlet and each of said gas passages such that the acoustical flow path from said outlet to each of said exhaust ports is approximately equal.
Claim 8
Dependent Claim
25 words
An outboard motor in accordance with claim 5 wherein said passage structure is provided with a jacket adapted to contain a flow of cooling water.
Claim 9
Dependent Claim
65 words
An outboard motor in accordance with claim 5 wherein said engine includes a member between and connected to said engine block and said housing structure and said member includes a part connected to said surface of said passage structure and an exhaust gas duct communicating through said part with said outlet of said passage structure and communicating with said exhaust gas pipe of said housing.
Claim 10
Dependent Claim
34 words
An outboard motor in accordance with claim 7 wherein said face of said engine block is at the rear of the outboard motor and said exhaust duct in said member extends downwardly and forwardly.
Claim 11
Dependent Claim
234 words
An outboard motor comprising a two-stroke internal combustion engine having an engine block with more than two cylinders, said cylinders each having an exhaust port, a lower unit including a drive shaft housing supporting said engine block at the top of said housing, a part connected to said drive shaft housing and extending, under normal operating conditions, into the water, a propeller supported by said part, and an exhaust gas pipe extending at least partially within said housing and having one end located adjacent to the top of said housing, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and including an outlet passageway communicating with said one end of said exhaust gas pipe and respective passageways communicating with each of said exhaust ports and with said outlet passageway so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, said acoustical flow distances having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the cylinder then being charged at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 12
Dependent Claim
234 words
An outboard motor comprising a two-stroke internal combustion engine having an engine block with more than two cylinders, said cylinders each having an exhaust port, a lower unit including a drive shaft housing supporting said engine block at the top of said housing, a part connected to said drive shaft housing and extending, under normal operating conditions, into the water, a propeller supported by said part, and an exhaust gas pipe extending at least partially within said housing and having one end located adjacent to the top of said housing, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and including an outlet passageway communicating with said one end of said exhaust gas pipe and respective passageways communicating with each of said exhaust ports and with said outlet passageway so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, said acoustical flow distances having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the cylinder then being charged at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 13
Dependent Claim
22 words
An outboard motor in accordance with claim 9 wherein said engine block includes three cylinders communicating with said exhaust gas passageway system.
Claim 14
Dependent Claim
18 words
An outboard motor in accordance with claim 9 including four cylinders communicating with aid exhaust gas passageway system.
Claim 15
Dependent Claim
27 words
An outboard motor in accordance with claim 9 wherein said one end of said exhaust gas pipe is upwardly open and said outlet passageway is downwardly open.
Claim 16
Dependent Claim
42 words
An outboard motor in accordance with claim 9 wherein said lower unit includes an adaptor member located between said engine block and said drive shaft housing and including an exhaust gas duct communicating between said outlet passageway and said exhaust gas pipe.
Claim 17
Dependent Claim
21 words
An outboard motor in accordance with claim 9 including a water jacket in cooling relation to said exhaust gas passageway system.
Claim 18
Dependent Claim
25 words
An outboard motor in accordance with claim 9 wherein said lower unit includes an underwater exhaust gas discharge outlet communicating with said exhaust gas pipe.
Claim 19
Dependent Claim
50 words
An outboard motor in accordance with claim 9 wherein said drive shaft housing includes an enlarged conduit portion and wherein said exhaust gas pipe discharges into said enlarged conduit portion and wherein the acoustical flow distances from each of said exhaust port to said enlarged conduit portion is substantially equal.
Claim 20
Dependent Claim
269 words
An outboard motor comprising a two-stroke internal combustion engine having an engine block with more than two cylinders, said cylinders each having an exhaust port, and a lower unit including a drive shaft housing supporting said engine block at the top of said housing, a part connected to said drive shaft housing and extending, under normal operating conditions, into the water, a propeller supported by said part, an exhaust gas pipe extending at least partially within said housing and having an upper end located adjacent to the top of said housing and a lower discharge outlet, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and including an outlet passageway communicating with said one end of said exhaust gas pipe and respective passageways communicating with each of said exhaust ports and with said outlet passageway so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, and so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas pipe discharge outlet, said acoustical flow distances between said exhaust gas ports having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the cylinder then being charged at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 21
Dependent Claim
269 words
An outboard motor comprising a two-stroke internal combustion engine having an engine block with more than two cylinders, said cylinders each having an exhaust port, and a lower unit including a drive shaft housing supporting said engine block at the top of said housing, a part connected to said drive shaft housing and extending, under normal operating conditions, into the water, a propeller supported by said part, an exhaust gas pipe extending at least partially within said housing and having an upper end located adjacent to the top of said housing and a lower discharge outlet, and an exhaust gas passageway system located above said one end of said exhaust gas pipe and including an outlet passageway communicating with said one end of said exhaust gas pipe and respective passageways communicating with each of said exhaust ports and with said outlet passageway so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas port of the cylinder being charged at the time of the opening of the exhaust gas port of the immediately previously fired cylinder, and so as to provide substantially equal acoustical flow distances between each of said exhaust gas ports and said exhaust gas pipe discharge outlet, said acoustical flow distances between said exhaust gas ports having a length such that the compressive wave emanating from opening of the exhaust gas port of the immediately previously fired cylinder arrives at the exhaust gas port of the cylinder then being charged at a time prior to closure of said exhaust gas port of the cylinder then being charged.
Claim 22
Independent Claim
152 words
A method of operating a multi-cylinder two-stroke internal combustion engine having more than two cylinders comprising sequentially firing all of the cylinders in a predetermined series, and sequentially causing, with respect to all of the cylinders and for a given engine speed condition, arrival of the compressive wave emanating from the opening of the exhaust port of the previously fired cylinder at the exhaust port of the cylinder then being charged at a uniform time prior to closure of the exhaust port of the cylinder then being charged, aNd also sequentially causing, with respect to all of the cylinders and for a given engine speed condition, generation by the compressive wave emanating from the exhaust port of the previously fired cylinder of a rarefaction wave which arrives at the exhaust port of the previously fired cylinder at a uniform time prior to closure of said exhaust port of the previously fired cylinder.
Claim 23
Independent Claim
152 words
A method of operating a multi-cylinder two-stroke internal combustion engine having more than two cylinders comprising sequentially firing all of the cylinders in a predetermined series, and sequentially causing, with respect to all of the cylinders and for a given engine speed condition, arrival of the compressive wave emanating from the opening of the exhaust port of the previously fired cylinder at the exhaust port of the cylinder then being charged at a uniform time prior to closure of the exhaust port of the cylinder then being charged, aNd also sequentially causing, with respect to all of the cylinders and for a given engine speed condition, generation by the compressive wave emanating from the exhaust port of the previously fired cylinder of a rarefaction wave which arrives at the exhaust port of the previously fired cylinder at a uniform time prior to closure of said exhaust port of the previously fired cylinder.
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |