US5148784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure of internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1991-04-18
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Granted: 1992-09-22
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Expires: 2011-04-18
Abstract
Abstract An internal combustion engine comprises a cylinder block including a front wall, and a chain cover attached to the front wall. Coolant passage walls defining a coolant passage are integrated with the front wall of the cylinder block and the chain cover, respectively. Heat insulating means are arranged to prevent a contact of lubricating oil and blow-by gas with the coolant passage walls.
Inventors
- 👤 Toyoki Hiraoka
- 👤 Syuji Kurosaka
- 👤 Nobuhisa Jingu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:04
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0002; F02F7/0012; F01; F01M; F01M11/00; F01P; F01P5/00; F01P5/10; F02F7/0065; F02F7/0073; F01M11/02; F01M13/00; F01P11/00; F01P11/04; F01P2070/00; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B77/00; F02B77/11
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
An internal combustion engine having a lubricating oil and a blow-by gas passing through a chain chamber, comprising: a cylinder block having a front wall; a chain cover, attached to said front wall of said cylinder block, for defining the chain chamber; means for defining a coolant passage, said defining means being integrated with said front wall of said cylinder block and said chain cover, said defining means extending through the chain chamber; and means for thermally isolating said defining means from the lubricating oil and the blow-by gas.
Claim 2
Dependent Claim
89 words
An internal combustion engine having a lubricating oil and a blow-by gas passing through a chain chamber, comprising: a cylinder block having a front wall; a chain cover, attached to said front wall of said cylinder block, for defining the chain chamber; means for defining a coolant passage, said defining means being integrated with said front wall of said cylinder block and said chain cover, said defining means extending through the chain chamber; and means for thermally isolating said defining means from the lubricating oil and the blow-by gas.
Claim 3
Dependent Claim
75 words
An internal combustion engine as claimed in claim 1, wherein said thermally isolating means includes: a first partition wall integrated with said front wall of said cylinder block, said first partition wall surrounding said defining means; a second partition wall integrated with said chain cover, said second partition wall surrounding said defining means, said second partition wall abutting upon said first partition wall; and an oil seal arranged between said first and second partition walls.
Claim 4
Dependent Claim
23 words
An internal combustion engine as claimed in claim 1, wherein said thermally isolating means includes a heat insulator placed on said defining means.
Claim 5
Dependent Claim
17 words
An internal combustion engine as claimed in claim 3, wherein said heat insulator includes an urethane foam.
Claim 6
Dependent Claim
177 words
An internal combustion engine including a cylinder block having a front wall, a chain chamber, and a crank chamber; a cylinder head disposed on the cylinder block and having a cam chamber and a front wall; a cam cover, attached to the cylinder head, for defining the cam chamber; a chain cover, attached to the cylinder block and the cylinder head on the front walls thereof, for defining the chain chamber; and an oil pan, mounted to the cylinder block, for defining the crank chamber; the engine having a lubricating oil which is returned to the oil pan from the cam chamber via the chain chamber and a blow-by gas which is blown into the crank chamber and introduced in the cam chamber via the chain chamber, the engine comprising: means for defining a coolant passage, said defining means being integrated with the front wall of the cylinder block and the chain cover, said defining means extending through the chain chamber; and means for thermally isolating said defining means from the lubricating oil and the blow-by gas.
Claim 7
Dependent Claim
177 words
An internal combustion engine including a cylinder block having a front wall, a chain chamber, and a crank chamber; a cylinder head disposed on the cylinder block and having a cam chamber and a front wall; a cam cover, attached to the cylinder head, for defining the cam chamber; a chain cover, attached to the cylinder block and the cylinder head on the front walls thereof, for defining the chain chamber; and an oil pan, mounted to the cylinder block, for defining the crank chamber; the engine having a lubricating oil which is returned to the oil pan from the cam chamber via the chain chamber and a blow-by gas which is blown into the crank chamber and introduced in the cam chamber via the chain chamber, the engine comprising: means for defining a coolant passage, said defining means being integrated with the front wall of the cylinder block and the chain cover, said defining means extending through the chain chamber; and means for thermally isolating said defining means from the lubricating oil and the blow-by gas.
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) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |