US4805442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knocking sensor for internal combustion engine
Assignee: Yamaha Marine Co Ltd
•
Filing: 1988-05-17
•
Granted: 1989-02-21
•
Expires: 2008-05-17
Abstract
Abstract A device for controlling the ignition of an internal combustion engine to eliminate knocking and including a knocking sensor and method for detecting knocking. The knocking sensor is positioned in proximity to one cylinder of the engine and a reference signal is generated when another of the cylinders fires. This reference signal is compared with the output of the knocking sensor to determine a knocking condition.
Inventors
- 👤 Shigeo Okumura
- 👤 Koshiro Inaba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:15
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/22; G01L23/221
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A knocking sensor for an engine having at least two cylinders spaced so that the engine construction effects vibration damping therebetween that fire alternatively, a knocking sensor mounted in proximity to one of said cylinders and spaced from the other of said cylinders, means for effecting and recording a reference signal commencing immediately after the other of said cylinder fires, and means for comparing the signal from said knocking sensor with said reference signal commencing immediately after the one cylinder fires to determine a knocking condition in the one cylinder.
Claim 2
Dependent Claim
90 words
A knocking sensor for an engine having at least two cylinders spaced so that the engine construction effects vibration damping therebetween that fire alternatively, a knocking sensor mounted in proximity to one of said cylinders and spaced from the other of said cylinders, means for effecting and recording a reference signal commencing immediately after the other of said cylinder fires, and means for comparing the signal from said knocking sensor with said reference signal commencing immediately after the one cylinder fires to determine a knocking condition in the one cylinder.
Claim 3
Dependent Claim
41 words
A knocking sensor as set forth in claim 1 wherein the engine has separate cylinder banks and the one cylinder is formed in one of the cylinder banks and the other cylinder is formed in the other of the cylinder banks.
Claim 4
Dependent Claim
26 words
A knocking sensor as set forth in claim 1 further including a position sensor for initiating the reference signal when the other of the cylinders fires.
Claim 5
Dependent Claim
23 words
A knocking sensor as set forth in claim 3 further including means for holding the reference signal until the other cylinder again fires.
Claim 6
Dependent Claim
41 words
A knocking sensor as set forth in claim 4 wherein the engine has separate cylinder banks and the one cylinder is formed in one of the cylinder banks and the other cylinder is formed in the other of the cylinder banks.
Claim 7
Dependent Claim
20 words
A knocking sensor as set forth in claim 5 wherein there are multiple cylinders in each of the cylinder banks.
Claim 8
Independent Claim
83 words
A method for sensing the knocking of an engine having two spaced cylinders that fire alternatively and including a knocking sensor mounted in proximity to one of the cylinders and spaced from another of the cylinders comprising the steps of effecting and recording a reference signal immediately after the other of the cylinders fires and comparing the signal from the knocking sensor immediately after the one of the cylinder fires with the reference signal to determine a knocking condition in the one cylinder.
Claim 9
Independent Claim
83 words
A method for sensing the knocking of an engine having two spaced cylinders that fire alternatively and including a knocking sensor mounted in proximity to one of the cylinders and spaced from another of the cylinders comprising the steps of effecting and recording a reference signal immediately after the other of the cylinders fires and comparing the signal from the knocking sensor immediately after the one of the cylinder fires with the reference signal to determine a knocking condition in the one cylinder.
Claim 10
Dependent Claim
17 words
A method as set forth in claim 7 wherein the cylinders are formed in separate cylinder banks.
Claim 11
Dependent Claim
22 words
A method as set forth in claim 7 further including holding the reference signal until the other of the cylinders again fires.
Claim 12
Dependent Claim
17 words
A method as set forth in claim 9 wherein the cylinders are formed in separate cylinder banks.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |