US4517945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine vibration transmission structure
Assignee: Nissan Motor Co Ltd
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Filing: 1982-12-23
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Granted: 1985-05-21
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Expires: 2002-12-23
Abstract
Abstract A structure for use in an internal combustion engine including a cooling passage between an engine block outer wall and cylinder walls each defining therein a cylinder. The engine block outer wall has a thickened portion with connection arms extending to the respective cylinder walls to provide a rigid connection between the cylinder wall and the position at which a knock sensor is attached. The rigid connection is effective to transmit vibrations due to internal combustion in the cylinders to the knock sensor with minimized attenuation and minimized distortion.
Inventors
- 👤 Kazuhiro Ishigami
- 👤 Shoji Furuhashi
- 👤 Haruo Yuzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:11
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/22; G01L23/221
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A structure for use in an internal combustion engine, said engine including an engine block having an engine block outer wall and a plurality of cylinder walls each defining therein a cylinder, a cooling passage defined by said engine block outer wall and said cylinder walls, and a transducer attached to an outer surface of said engine block wall for sensing vibratory forces due to internal combustion in each cylinder, said structure comprising a thickened portion of said engine block outer wall with connection arms extending to said respective cylinder walls to provide a rigid connection between said cylinder walls and a position at which said transducer is attached on said outer surface of said engine block outer wall.
Claim 2
Dependent Claim
119 words
A structure for use in an internal combustion engine, said engine including an engine block having an engine block outer wall and a plurality of cylinder walls each defining therein a cylinder, a cooling passage defined by said engine block outer wall and said cylinder walls, and a transducer attached to an outer surface of said engine block wall for sensing vibratory forces due to internal combustion in each cylinder, said structure comprising a thickened portion of said engine block outer wall with connection arms extending to said respective cylinder walls to provide a rigid connection between said cylinder walls and a position at which said transducer is attached on said outer surface of said engine block outer wall.
Claim 3
Dependent Claim
22 words
The structure of claim 1, wherein said thickened portion has a thickness more that of double than said engine block outer wall.
Claim 4
Dependent Claim
22 words
The structure of claim 2, wherein said connection arms have a transverse sectional area substantially equal to that of said thickened portion.
Claim 5
Dependent Claim
22 words
The structure of claim 1, wherein said connection arms have a transverse sectional area substantially equal to that of said thickened portion.
Claim 6
Dependent Claim
17 words
The structure of claim 1, wherein said thickened portion extends linearly to connect the outermost connection arms.
Claim 7
Dependent Claim
22 words
The structure of claim 4, wherein said thickened portion has a thickness more that of double than said engine block outer wall.
Claim 8
Dependent Claim
35 words
The structure of claim 4, wherein said thickened portion has a thickness more that of double than said engine block outer wall and a transverse sectional area substantially equal to that of said connection arms.
Claim 9
Dependent Claim
28 words
The structure of claim 4, wherein said thickened portion has a branch extending to said position at which said transducer is attached on said engine block outer wall.
Claim 10
Dependent Claim
22 words
The structure of claim 5, wherein said thickened portion has a thickness more that of double than said engine block outer wall.
Claim 11
Dependent Claim
35 words
The structure of claim 5, wherein said thickened portion has a thickness more that of double than said engine block outer wall and a transverse sectional area substantially equal to that of said connection arms.
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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |