US5042326A
Expired / Lapsed
US
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System for controlling continuously variable transmission
Assignee: Nissan Motor Co Ltd
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Filing: 1990-04-17
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Granted: 1991-08-27
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Expires: 2010-04-17
Abstract
Abstract A system for controlling a continuously variable transmission. A target value of an input revolution speed or a reduction ratio is modified in response to a current engine torque. A shift actuator is controlled such that a deviation between current and modified target values reduces to zero.
Inventors
- 👤 Toshifumi Hibi
- 👤 Masaki Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/664; F16H61/6648
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
A system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the system comprising: means for determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; means for detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; means for detecting a torque which the continuously variable transmission is subject to and generating a torque indicative signal indicative of said torque detected; means for modifying said target value of said predetermined variable in response to said torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and means for controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 2
Independent Claim
180 words
A system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the system comprising: means for determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; means for detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; means for detecting a torque which the continuously variable transmission is subject to and generating a torque indicative signal indicative of said torque detected; means for modifying said target value of said predetermined variable in response to said torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and means for controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 3
Independent Claim
173 words
A method of controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the method comprising the steps of: determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; detecting a torque which the continuously variable transmission is subject to and generating a torque indicative signal indicative of said torque detected; modifying said target value of said predetermined variable in response to said torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 4
Independent Claim
173 words
A method of controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the method comprising the steps of: determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; detecting a torque which the continuously variable transmission is subject to and generating a torque indicative signal indicative of said torque detected; modifying said target value of said predetermined variable in response to said torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 5
Dependent Claim
197 words
In an automotive vehicle having an engine, and a continuously variable transmission which is subject to an engine torque of the engine, a system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the system comprising: means for determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; means for detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; means for detecting the engine torque and generating an engine torque indicative signal indicative of the engine torque detected; means for modifying said target value of said predetermined variable in response to said engine torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; means for controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 6
Dependent Claim
197 words
In an automotive vehicle having an engine, and a continuously variable transmission which is subject to an engine torque of the engine, a system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at, the system comprising: means for determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; means for detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; means for detecting the engine torque and generating an engine torque indicative signal indicative of the engine torque detected; means for modifying said target value of said predetermined variable in response to said engine torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; means for controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 7
Dependent Claim
185 words
In an automotive vehicle having an engine, and a continuously variable transmission which is subject to an engine torque of the engine, a system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at: determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; detecting the engine torque and generating an engine torque indicative signal indicative of the engine torque detected; modifying said target value of said predetermined variable in response to said engine torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
Claim 8
Dependent Claim
185 words
In an automotive vehicle having an engine, and a continuously variable transmission which is subject to an engine torque of the engine, a system for controlling a continuously variable transmission such that the continuously variable transmission is adjusted to a reduction ratio that is determined in response to a position which a shift actuator is positioned at: determining a target value of a predetermined variable related to a reduction ratio which the continuously variable transmission should be adjusted to and generating a target value indicative signal indicative of said target value determined; detecting a current value of said predetermined variable and generating a current value indicative signal indicative of said current value detected; detecting the engine torque and generating an engine torque indicative signal indicative of the engine torque detected; modifying said target value of said predetermined variable in response to said engine torque indicative signal and generating a modified target value indicative signal indicative of said target value modified; and controlling the shift actuator such that a deviation between said current value indicative signal and said modified target value indicative signal reduces to zero.
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |