US5005553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation system for automotive engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1990-02-27
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Granted: 1991-04-09
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Expires: 2010-02-27
Abstract
Abstract A number of embodiments of internal combustion engine constructions having intake manifold passages that extend from the intake ports back over the top of the engine and above the cylinder head assembly to provide a long intake passage for good low speed running. In all embodiments, an oil separator is formed in the cam cover and the engine is inclined from the vertical so as to permit clearance for the oil separator beneath the intake manifold without increasing the overall height of the engine.
Inventors
- 👤 Takehiro Washizu
- 👤 Tsutomu Nagamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10209; F02M35/10222; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F01M13/04; F01M13/0416; F02B; F02B27/00; F02B27/02; F02B27/0205; F02B27/0215; F02B27/0221; F02B27/0226; F02B27/0247; F02B27/0252; F02B27/0268; F02B27/0273; F02M35/10006; F02M35/10026; F02M35/10045; F02M35/10072; F02M35/10091; F02M35/10111; F02M35/104; F02M35/112; F02M35/16; F02M35/161; F02B75/00; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1816; F02B2275/00; F02B2275/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
An internal combustion engine having a cylinder block with at least one cylinder bore formed therein, a cylinder head assembly affixed to said cylinder block and closing said cylinder bore, a crankcase ventilation oil separator affixed to said cylinder head assembly and protruding at least in part upwardly therefrom, an intake port formed in one side of said cylinder head assembly for supplying a charge to said cylinder bore, and an intake manifold extending from said intake port and across said cylinder head assembly toward the other side thereof and above said crankcase ventilation oil separator, said cylinder block being disposed with its axis inclined to the vertical for increasing the distance between said crankcase ventilation oil separator and said intake manifold without increasing the height of the engine.
Claim 2
Dependent Claim
129 words
An internal combustion engine having a cylinder block with at least one cylinder bore formed therein, a cylinder head assembly affixed to said cylinder block and closing said cylinder bore, a crankcase ventilation oil separator affixed to said cylinder head assembly and protruding at least in part upwardly therefrom, an intake port formed in one side of said cylinder head assembly for supplying a charge to said cylinder bore, and an intake manifold extending from said intake port and across said cylinder head assembly toward the other side thereof and above said crankcase ventilation oil separator, said cylinder block being disposed with its axis inclined to the vertical for increasing the distance between said crankcase ventilation oil separator and said intake manifold without increasing the height of the engine.
Claim 3
Dependent Claim
30 words
An internal combustion engine as set forth in claim 1 wherein the crankcase ventilation oil separator lies on the same side of the cylinder head assembly as the intake port.
Claim 4
Dependent Claim
25 words
An internal combustion engine as set forth in claim 2 wherein the engine is inclined from the vertical toward the one side of the engine.
Claim 5
Dependent Claim
30 words
An internal combustion engine as set forth in claim 1 wherein the crankcase ventilation oil separator is positioned on the other side of the cylinder head from the intake side.
Claim 6
Dependent Claim
29 words
An internal combustion engine as set forth in claim 4 wherein the engine is inclined from the vertical toward the crankcase ventilation oil separator side of the cylinder head.
Claim 7
Dependent Claim
41 words
An internal combustion engine as set forth in claim 1 wherein the cylinder head assembly includes a pair of camshafts covered by a cam cover and wherein the oil separator is affixed to the cam cover over one of the camshafts.
Claim 8
Dependent Claim
30 words
An internal combustion engine as set forth in claim 6 wherein the crankcase ventilation oil separator lies on the same side of the cylinder head assembly as the intake port.
Claim 9
Dependent Claim
25 words
An internal combustion engine as set forth in claim 7 wherein the engine is inclined from the vertical toward the one side of the engine.
Claim 10
Dependent Claim
30 words
An internal combustion engine as set forth in claim 6 wherein the crankcase ventilation oil separator is positioned on the other side of the cylinder head from the intake side.
Claim 11
Dependent Claim
29 words
An internal combustion engine as set forth in claim 9 wherein the engine is inclined from the vertical toward the crankcase ventilation oil separator side of the cylinder head.
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) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |