US4359894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle valve most closed position sensing system
Assignee: Nissan Motor Co Ltd
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Filing: 1981-01-30
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Granted: 1982-11-23
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Expires: 2001-01-30
Abstract
Abstract A throttle-valve most closed position sensing system is disclosed for use with an internal combustion engine. The system includes a throttle position sensor for providing a signal indicative of the degree of opening of the associated throttle-valve. A decision circuit is provided for deciding throttle-valve position as the most closed position when receiving a throttle-valve position indicative signal smaller than or equal to the smallest signal having received from the throttle position sensor.
Inventors
- 👤 Kenji Ikeura
- 👤 Kunifumi Sawamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:30
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/28; F02D2250/00; F02D2250/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A throttle-valve most closed position sensing system for use with an internal combustion engine having an induction passage provided thereinwith a throttle valve, said system comprising: (a) a throttle position sensor for providing a signal proportional to the degree of opening of said throttle valve; and (b) a decision circuit for deciding throttle-valve position as the most closed position when receiving, from said throttle position sensor, a signal smaller than or equal to the smallest signal having received therefrom.
Claim 2
Dependent Claim
79 words
A throttle-valve most closed position sensing system for use with an internal combustion engine having an induction passage provided thereinwith a throttle valve, said system comprising: (a) a throttle position sensor for providing a signal proportional to the degree of opening of said throttle valve; and (b) a decision circuit for deciding throttle-valve position as the most closed position when receiving, from said throttle position sensor, a signal smaller than or equal to the smallest signal having received therefrom.
Claim 3
Dependent Claim
49 words
A system according to claim 1, wherein said decision circuit is adapted to store a received signal value in place of a previously stored value and decide throttle-valve position as the most closed position when the received signal value is smaller than or equal to the previously stored value.
Claim 4
Dependent Claim
41 words
A system according to claim 1, wherein said decision circuit is adapted to decide throttle-valve position as the most closed position also when the received signal value is smaller than or equal to the previously stored value plus a predetermined value.
Claim 5
Dependent Claim
81 words
A throttle-valve most closed position sensing system for use with an internal combustion engine having an induction passage provided therein with a throttle valve, said system comprising; (a) a throttle position sensor for providing a signal inversely proportional to the degree of opening of said throttle valve; and (b) a decision circuit for deciding throttle-valve position as the most closed position when receiving, from said throttle position sensor, a signal larger than or equal to the largest signal having received therefrom.
Claim 6
Dependent Claim
81 words
A throttle-valve most closed position sensing system for use with an internal combustion engine having an induction passage provided therein with a throttle valve, said system comprising; (a) a throttle position sensor for providing a signal inversely proportional to the degree of opening of said throttle valve; and (b) a decision circuit for deciding throttle-valve position as the most closed position when receiving, from said throttle position sensor, a signal larger than or equal to the largest signal having received therefrom.
Claim 7
Dependent Claim
49 words
A system according to claim 4, wherein said decision circuit is adapted to store a received signal value in place of a previously stored value and decide throttle-valve position as the most closed position when the received signal value is larger than or equal to the previously stored value.
Claim 8
Dependent Claim
41 words
A system according to claim 5, wherein said decision circuit is adapted to decide throttle-valve position as the most closed position also when the received signal value is larger than or equal to the previously stored value minus a predetermined value.
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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |