US5623895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
V-type, multi-cylinder, two-cycle engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1995-02-06
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Granted: 1997-04-29
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Expires: 2015-02-06
Abstract
Abstract An improved scavenging control system for a multi-cylinder, V-type, two-cycle crankcase compression internal combustion engine. In each embodiment, a scavenging manifold extends along one side of the crankcase chamber and communicates with the individual sealed sections therein through respective scavenging control passages. A plurality of butterfly-type throttle valves controls the communication between the crankcase chamber and the scavenging manifold and these valves are all affixed on a common valve shaft. In one embodiment, the scavenge control system is disposed in the valley between the cylinder banks and in the other illustrated embodiment, the scavenging system is disposed on one side of the crankcase and outside of the valley between the cylinder banks.
Inventors
- 👤 Tatsuyuki Masuda
- 👤 Seiichi Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:04
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/26; F02B25/28; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02D; F02D9/00; F02D9/02; F02D2009/0201; F02D2009/0291
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
102 words
A scavenge control system for a V-type crankcase compression internal combustion engine having a pair of angularly related cylinder banks each containing a plurality of cylinder bores, a crankcase chamber from which said cylinder banks radiate and having a plurality of sealed chamber sections each associated with a respective cylinder bore, a single scavenging manifold extending along one side of said crankcase chamber, a plurality of scavenging control passages each extending from a respective one of said crankcase chamber sections into said scavenging manifold, and valve means for controlling the communication of each of said crankcase chamber sections with said scavenging manifold.
Claim 2
Dependent Claim
102 words
A scavenge control system for a V-type crankcase compression internal combustion engine having a pair of angularly related cylinder banks each containing a plurality of cylinder bores, a crankcase chamber from which said cylinder banks radiate and having a plurality of sealed chamber sections each associated with a respective cylinder bore, a single scavenging manifold extending along one side of said crankcase chamber, a plurality of scavenging control passages each extending from a respective one of said crankcase chamber sections into said scavenging manifold, and valve means for controlling the communication of each of said crankcase chamber sections with said scavenging manifold.
Claim 3
Dependent Claim
35 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 1, wherein the cylinder banks are disposed at a V-angle to each other and define a valley therebetween.
Claim 4
Dependent Claim
30 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 2, wherein the scavenging manifold extends in the valley between the cylinder banks.
Claim 5
Dependent Claim
34 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 3, wherein the scavenging manifold is formed in part by the facing surfaces of the cylinder banks.
Claim 6
Dependent Claim
30 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 4, wherein the scavenging control passages extend in part into the scavenging manifold.
Claim 7
Dependent Claim
38 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 5, wherein the valve means are positioned in the portion of the scavenging control passages that extend into the scavenging manifold.
Claim 8
Dependent Claim
44 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 6, further including a pair of exhaust manifolds extending into the valley from the respective cylinder banks for receiving the exhaust gases from the cylinder bores therein.
Claim 9
Dependent Claim
29 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 7, wherein the scavenging manifold is further formed by the exhaust manifold.
Claim 10
Dependent Claim
44 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 3, further including a pair of exhaust manifolds extending into the valley from the respective cylinder banks for receiving the exhaust gases from the cylinder bores therein.
Claim 11
Dependent Claim
29 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 9, wherein the scavenging manifold is further formed by the exhaust manifold.
Claim 12
Dependent Claim
34 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 2, wherein the scavenging manifold extends along an area outside of the valley between the cylinder banks.
Claim 13
Dependent Claim
35 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 11, wherein the scavenging manifold extends along one side of the crankcase chamber adjacent a respective cylinder bank.
Claim 14
Dependent Claim
28 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 1, wherein the valve means comprise a plurality of butterfly-type valves.
Claim 15
Dependent Claim
30 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 13, wherein there is provided one butterfly-type valve in each scavenging control passage.
Claim 16
Dependent Claim
32 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 14, wherein all of the butterfly-type scavenge control valves are supported on a common shaft.
Claim 17
Dependent Claim
35 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 15, wherein the cylinder banks are disposed at a V-angle to each other and define a valley therebetween.
Claim 18
Dependent Claim
30 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 16, wherein the scavenging manifold extends in the valley between the cylinder banks.
Claim 19
Dependent Claim
34 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 17, wherein the scavenging manifold is formed in part by the facing surfaces of the cylinder banks.
Claim 20
Dependent Claim
30 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 18, wherein the scavenging control passages extend in part into the scavenging manifold.
Claim 21
Dependent Claim
38 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 19, wherein the valve means are positioned in the portion of the scavenging control passages that extend into the scavenging manifold.
Claim 22
Dependent Claim
44 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 20, further including a pair of exhaust manifolds extending into the valley from the respective cylinder banks for receiving the exhaust gases from the cylinder bores therein.
Claim 23
Dependent Claim
29 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 21, wherein the scavenging manifold is further formed by the exhaust manifold.
Claim 24
Dependent Claim
44 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 18, further including a pair of exhaust manifolds extending into the valley from the respective cylinder banks for receiving the exhaust gases from the cylinder bores therein.
Claim 25
Dependent Claim
29 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 23, wherein the scavenging manifold is further formed by the exhaust manifold.
Claim 26
Dependent Claim
34 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 16, wherein the scavenging manifold extends along an area outside of the valley between the cylinder banks.
Claim 27
Dependent Claim
35 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 25, wherein the scavenging manifold extends along one side of the crankcase chamber adjacent a respective cylinder bank.
Claim 28
Dependent Claim
60 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 1, further including a piston slidably supported in each of the cylinder bores, a single crankshaft rotatably journaled within the crankcase chamber, and a plurality of connecting rods, each connecting a respective one of said pistons to said crankshaft for driving said crankshaft.
Claim 29
Dependent Claim
49 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 27, wherein the engine comprises a direct fuel injected engine including a plurality of fuel injectors, each injecting fuel into a respective combustion chamber formed by a respective cylinder bore and piston.
Claim 30
Dependent Claim
26 words
A scavenge control system for a V-type crankcase compression internal combustion engine as set forth in claim 28, wherein the engine operates on a diesel principle.
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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) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |