US4889094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recognizing the power stroke of a cylinder of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1987-03-06
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Granted: 1989-12-26
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Expires: 2007-03-06
Abstract
Abstract A method for recognition of the power stroke of an internal combustion engine is proposed, in which recognition as to whether a cylinder is currently in the power stroke is possible by means of camparison of a signal that is synchronous with the crankshaft angle and a signal that is modulated by the combustion events of the engine.
Inventors
- 👤 Hans-Ernst Beyer
- 👤 Jorg Bonitz
- 👤 Robert Entenmann
- 👤 Siegmar Forster
- 👤 Rochus Knab
- 👤 Walter Kunzel
- 👤 Wolfgang Kugler
- 👤 Alfred Mahlberg
- 👤 Bernhard Miller
- 👤 Matthias Philipp
- 👤 Siegfried Rohde
- 👤 Stefan Unland
- 👤 Walter Viess
- 👤 Herbert Winter
- 👤 Jurgen Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:02
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/009; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/0675; F02P7/077; F02P7/0775; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02D2041/0092
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A method for the recognition of the power stroke of a cylinder of an internal combustion engine having an odd number of cylinders, comprising the steps of forming, form a single sensor and transducer disk a first signal which depends on a predetermined crankshaft angle; forming a second signal from said same single sensor and transducer disk which corresponds to the basic frequency of the combustion events in the engine; and combining the first and second signals according to a logic function to generate a power stroke recognition signal.
Claim 2
Independent Claim
89 words
A method for the recognition of the power stroke of a cylinder of an internal combustion engine having an odd number of cylinders, comprising the steps of forming, form a single sensor and transducer disk a first signal which depends on a predetermined crankshaft angle; forming a second signal from said same single sensor and transducer disk which corresponds to the basic frequency of the combustion events in the engine; and combining the first and second signals according to a logic function to generate a power stroke recognition signal.
Claim 3
Dependent Claim
23 words
A method as defined in claim 1 wherein said second signal is derived from the rotary speed of the crankshaft of the engine.
Claim 4
Dependent Claim
24 words
A method as defined in claim 2 wherein said second signal is derived from the rotary speed variation of the crankshaft of the engine.
Claim 5
Dependent Claim
25 words
A method as defined in claim 1 wherein said second signal is derived from the pressure variations in the air intake system of the engine.
Claim 6
Dependent Claim
21 words
A method as defined in claim 1 wherein said second signal is derived from the battery voltage variations of the engine.
Claim 7
Dependent Claim
18 words
A method as defined in claim 1 wherein said second signal is derived from the engine temperature variations.
Claim 8
Dependent Claim
69 words
A method as defined in claim 1 wherein said first and second second signals are digital signals, said first signal assuming a predetermined logical state when the work volume of the combustion chamber in a predetermined cylinder increases in size as a result of the piston motion, and said second signal assuming a predetermined logical state whenever a combustion event is taking place in any cylinder of the engine.
Claim 9
Dependent Claim
25 words
A method as defined in claim 7 wherein said second signal is inverted and combined with said first signal according to the logical and function.
Claim 10
Dependent Claim
34 words
A method as defined in claim 1 wherein said basic frequency of the combustion events is determined by the ratio of the number of cylinders of the engine to two cycles of the crankshaft.
References Cited (Backward Citations)
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US4268888A
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US4335599A
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US4429365A
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US4596227A
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US4656993A
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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) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |