US5143028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged V type two cycle engine
Assignee: Yamaha Marine Co Ltd
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Filing: 1990-12-06
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Granted: 1992-09-01
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Expires: 2010-12-06
Abstract
Abstract Several embodiments of V type supercharged two cycle internal combustion engines, in all embodiments the supercharger supplies air to a scavenge manifold that extends at least partially around the cylinder bores and which serves the cylinder bores through a plurality of scavenge passages, each of which is disposed to direct the intake charge away from the exhaust ports. In some embodiments, the supercharger is positioned out of the valley of the V and in one embodiment, the supercharger is positioned in the valley of the V.
Inventors
- 👤 Masanori Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:40
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/32; F02B33/34; F02B33/36; F02B33/38; F02B25/00; F02B25/26; F02B25/28; F02B33/44; F02B37/00; F02B37/02; F02B75/00; F02B75/02; F02B75/16; F02B75/18; F02B75/20; F02B75/22; F02B1/00; F02B1/02; F02B1/04; F02B2075/022; F02B2075/025; F02B2075/1804; F02B2075/1812; F02B2075/1824; F02B61/00; F02B61/04; F02B61/045; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A two cycle internal combustion engine having a pair of angularly related cylinder banks, defining a valley between said banks, each containing at least one cylinder bore, a pair of scavenge manifolds each at least partially encircling a cylinder bore of a respective bank, at least one scavenge passage extending from said scavenge manifold to the respective cylinder bore and opened and closed by a piston reciprocating therein, a crankcase containing a crankshaft rotatable about an axis, said cylinder banks extending on one side of a plane containing said crankshaft axis, and a supercharger for delivering a pressured charge to said scavenge manifolds positioned externally of said crankcase on the other side of said plane.
Claim 2
Dependent Claim
115 words
A two cycle internal combustion engine having a pair of angularly related cylinder banks, defining a valley between said banks, each containing at least one cylinder bore, a pair of scavenge manifolds each at least partially encircling a cylinder bore of a respective bank, at least one scavenge passage extending from said scavenge manifold to the respective cylinder bore and opened and closed by a piston reciprocating therein, a crankcase containing a crankshaft rotatable about an axis, said cylinder banks extending on one side of a plane containing said crankshaft axis, and a supercharger for delivering a pressured charge to said scavenge manifolds positioned externally of said crankcase on the other side of said plane.
Claim 3
Dependent Claim
23 words
A two cycle internal combustion engine as set forth in claim 1 wherein a single supercharger is provided for both banks of cylinders.
Claim 4
Dependent Claim
30 words
A two cycle internal combustion engine as set forth in claim 2 wherein the supercharger is positioned adjacent at the bottom of the crankcase in opposed position to the valley.
Claim 5
Dependent Claim
23 words
A two cycle internal combustion engine as set forth in claim 1 wherein there is provided a supercharger for each bank of cylinders.
Claim 6
Dependent Claim
30 words
A two cycle internal combustion engine as set forth in claim 4 wherein each supercharger is positioned to one side of the crankcase and adjacent the cylinder bank served thereby.
Claim 7
Dependent Claim
61 words
A two cycle internal combustion engine as set forth in claim 1 wherein there are a plurality of scavenge passages each extending from the scavenge manifold to a respective scavenge port serving the respective cylinder bank, all of said scavenge passages and scavenge ports being disposed to direct the intake charge away from an exhaust port formed in each cylinder bore.
Claim 8
Dependent Claim
38 words
A two cycle internal combustion engine as set forth in claim 6 wherein each cylinder bank has multiple cylinder bores each having its own scavenge manifold and scavenge ports with the scavenge manifolds of adjacent cylinders being common.
Claim 9
Dependent Claim
24 words
A two cycle internal combustion engine as set forth in claim 7 wherein the scavenge manifolds of adjacent cylinder bores have a common portion.
Claim 10
Dependent Claim
61 words
A two cycle internal combustion engine as set forth in claim 8 wherein there are a plurality of scavenge passages each extending from the scavenge manifold to a respective scavenge port serving the respective cylinder bank, all of said scavenge passages and scavenge ports being disposed to direct the intake charge away from an exhaust port formed in each cylinder bore.
Claim 11
Dependent Claim
23 words
A two cycle internal combustion engine as set forth in claim 9 wherein a single supercharger is provided for each bank of cylinders.
Claim 12
Dependent Claim
30 words
A two cycle internal combustion engine as set forth in claim 10 wherein the supercharger is positioned adjacent at the bottom of the crankcase in opposed position to the valley.
Claim 13
Dependent Claim
22 words
A two cycle internal combustion engine as set forth in claim 9 wherein is provided a supercharger for each bank of cylinders.
Claim 14
Dependent Claim
30 words
A two cycle internal combustion engine as set forth in claim 12 wherein each supercharger is positioned to one side of the crankcase and adjacent the cylinder bank served thereby.
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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) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |