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US4483183A
Expired / Lapsed
US
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System for measuring crank angle for internal combustion engine
Assignee: Subaru Corp
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Filing: 1982-06-03
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Granted: 1984-11-20
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Expires: 2002-06-03
Abstract
Abstract A system for measuring crank angle of an internal combustion engine by detecting the variation of the pressure in the induction passage of the engine. The system is provided with a pressure sensor responsive to the pressure in the induction passage for generating an output signal, and a pulse generating circuit. The pulse generating circuit operates to produce pulses from the variation of the output signal of the pressure sensor and comprises a circuit for producing a mean value between the maximum value and the minimum value of the output signal.
Inventors
- 👤 Hitoshi Suzuki
- 👤 Tokuro Morozumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/061; G; G01; G01L; G01L23/00; G01L23/24; G01L23/26; G01L23/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A system for measuring crank angle for an internal combustion engine having an induction passage and exhaust passage comprising: a pressure sensor responsive to the pressure in one of said passages for generating an output signal; circuit means for generating pulses by using values periodically occurring in said output signal; said circuit means comprising a circuit for producing a mean value between the maximum value and the minimum value of said output signal, and said circuit means further comprises a comparator for comparing said output signal with said mean value for generating said pulses.
Claim 2
Independent Claim
94 words
A system for measuring crank angle for an internal combustion engine having an induction passage and exhaust passage comprising: a pressure sensor responsive to the pressure in one of said passages for generating an output signal; circuit means for generating pulses by using values periodically occurring in said output signal; said circuit means comprising a circuit for producing a mean value between the maximum value and the minimum value of said output signal, and said circuit means further comprises a comparator for comparing said output signal with said mean value for generating said pulses.
Claim 3
Dependent Claim
25 words
The system for measuring crank angle for an internal combustion engine according to claim 1, wherein said one of said passages is said induction passage.
Claim 4
Independent Claim
77 words
A system for measuring crank angle for an internal combustion engine having an induction passage and exhaust passage comprising: a pressure sensor responsive to the pressure in one of said passages for generating an output signal; circuit means comprises means for comparing said output signal with maximum or minimum values of said output signal for generating pulses by detecting the maximum or minimum values of said output signal, said pulses being adapted for control of the engine.
Claim 5
Independent Claim
77 words
A system for measuring crank angle for an internal combustion engine having an induction passage and exhaust passage comprising: a pressure sensor responsive to the pressure in one of said passages for generating an output signal; circuit means comprises means for comparing said output signal with maximum or minimum values of said output signal for generating pulses by detecting the maximum or minimum values of said output signal, said pulses being adapted for control of the engine.
References Cited (Backward Citations)
US3864963A
Cited
US3977239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |