US3858562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple input port internal combustion engine
Assignee: Brunswick Corp
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Filing: 1972-11-17
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Granted: 1975-01-07
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Expires: 1992-11-17
Abstract
Abstract A two-cycle internal combustion engine wherein the cylinders have a plurality of input or transfer ports through one side of the cylinder wall and a plurality of exhaust ports through the diametrically opposite side wall. Each piston includes a baffle plate extending upwardly from the piston crown, generally curved outwardly from the input ports and located between the inlet ports and an imaginary transverse vertical plane bisecting the piston. The wall directs the fuel-air charges entering through the transfer ports toward each other to define a combined stream which rises to the top of the cylinder as the combusted gases move out through the exhaust ports on the opposite side. Auxiliary inlet channels in the interior of the cylinder wall communicate with apertures in the piston side wall so that a portion of the fuel-air mixture passes therethrough from the crankcase to the combustion chamber without going through the transfer ports.
Inventors
- 👤 Richard A Lanpheer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:05
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/14; F02B25/18; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
In a two-cycle engine generally of the cross-scavenged type having a piston reciprocally mounted within a cylinder, main charge inlet ports and an exhaust port positioned on opposite sides of an imaginary plane vertically bisEcting the cylinder, and baffle means extending upwardly of the face of the piston concave to said charge inlet ports and positioned entirely to the inlet side of said reference plane to deflect the inlet gas flow from said charge inlet ports, an improvement comprising auxiliary inlet port means located on the exhaust port side of said baffle means but entirely on the inlet side of said imaginary reference plane each of said auxiliary inlet port means communicating with the crank case of the engine, and being configured to discharge upwardly and radially inwardly of said cylinder so as to introduce additional fuel-air charge behind said baffle means and to the inlet side of said imaginary plane.
Claim 2
Dependent Claim
151 words
In a two-cycle engine generally of the cross-scavenged type having a piston reciprocally mounted within a cylinder, main charge inlet ports and an exhaust port positioned on opposite sides of an imaginary plane vertically bisEcting the cylinder, and baffle means extending upwardly of the face of the piston concave to said charge inlet ports and positioned entirely to the inlet side of said reference plane to deflect the inlet gas flow from said charge inlet ports, an improvement comprising auxiliary inlet port means located on the exhaust port side of said baffle means but entirely on the inlet side of said imaginary reference plane each of said auxiliary inlet port means communicating with the crank case of the engine, and being configured to discharge upwardly and radially inwardly of said cylinder so as to introduce additional fuel-air charge behind said baffle means and to the inlet side of said imaginary plane.
Claim 3
Dependent Claim
38 words
The device of claim 1, wherein said auxiliary inlet port means includes a first and a second port located circumferentially to the opposite sides of said charging ports and substantially between said baffle means and said reference plane.
Claim 4
Dependent Claim
23 words
The device of claim 1, wherein a plurality of said auxiliary ports are provided on each side of said main inlet port means.
Claim 5
Dependent Claim
29 words
The device of claim 1, in which said auxiliary port means comprise a recess in the cylinder wall and a through opening in the side wall of the piston.
Claim 6
Dependent Claim
70 words
The device of claim 4, wherein the top of said auxiliary port is spaced downwardly from the top of said charging ports and wherein said auxiliary port extends downwardly below the bottom edge of said main charging ports so as to maintain communication between the opening in said piston and said auxiliary port as the top of the piston moves downwardly below the top edge of said main charging port.
Claim 7
Dependent Claim
63 words
The device of claim 1, wherein said charging ports encompass approximately a 120* span of the cylinder wall, and said auxiliary inlet port means are located to the opposite sides of said charging port means and within 30* of the outer edge of said charging ports to maintain the input port area within the 180* sector on the cylinder encompassing the charging ports.
Claim 8
Dependent Claim
29 words
The device of claim 6, wherein said auxiliary input port means are finger ports having an upper head end located beneath the top edge of the main charging ports.
Claim 9
Dependent Claim
94 words
The device of claim 1, in which said auxiliary port means include a pair of finger ports defined by axial recesses in the cylinder wall to the opposite sides of said directing means and a pair of corresponding through openings in the side wall of the piston, said finger ports being spaced downwardly from the top edge opening of the main charging ports and extending substantially below the bottom edge of the charging ports to maintain communication with the opening in said piston as said piston moves downwardly fully opening the main charging ports.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |