EP0168540A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for controlling continuously variable transmission used in vehicle
Assignee: Toyota Motor Corp
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Filing: 1984-12-21
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Granted: —
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Expires: 2004-12-21
Abstract
Abstract A continuously variable transmission (CVT) for use in a vehicle is controlled such that an actual engine speed Ne is equalized to a desired engine speed No. When a driver's request for a rapid speed change of the vehicle is addressed, a desired engine speed Ns for steady state or the desired engine speed No before the request is detected, is defined as a first value Nc1. While the request continues the desired engine speed Ns for steady state which is determined by current values of vehicle running parameters is defined as a second value Nc2. The product B · (Nc2-Nc1) of a constant B and Nc2 minus Ncl is calculated and defined as a desired engine speed during the request.
Inventors
- 👤 Hiroshi Itoh
- 👤 Mitsuru Takada
- 👤 Hiroshi Sasaoka
- 👤 Takahumi Inagaki
- 👤 Susumu Masutomi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:32
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60W10/10; B60W10/101; B60W30/00; B60W30/18; B60W30/1819; F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66254; B60W2710/00; B60W2710/06; B60W2710/0644
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
An apparatus for controlling a continuously variable transmission used in a vehicle which controls an engine speed Ne or speed ratio e of continuously variable transmission such that the engine speed Ne becomes a desired engine speed No, comprising: a means for calculating a desired engine speed Ns for steady state in relation to the running parameters of the vehicle, a means for detecting the request for abrupt speed change, a means for setting the desired engine speed Ns for steady state before the request for abrupt speed change is detected or the desired engine speed No as a first value Ncl; a means for calculating the desired engine speed Ns for steady state corresponding to the running parameter value of the vehicle at the present time as a second value Nc2; a means for calculating the product B-(Nc2-Ncl) of a constant B and Nc2-Ncl as a correction value ΔNo; and a means for setting Ncl + ΔNO as the desired engine speed No while the request for abrupt speed change is detected.
Claim 2
Independent Claim
173 words
An apparatus for controlling a continuously variable transmission used in a vehicle which controls an engine speed Ne or speed ratio e of continuously variable transmission such that the engine speed Ne becomes a desired engine speed No, comprising: a means for calculating a desired engine speed Ns for steady state in relation to the running parameters of the vehicle, a means for detecting the request for abrupt speed change, a means for setting the desired engine speed Ns for steady state before the request for abrupt speed change is detected or the desired engine speed No as a first value Ncl; a means for calculating the desired engine speed Ns for steady state corresponding to the running parameter value of the vehicle at the present time as a second value Nc2; a means for calculating the product B-(Nc2-Ncl) of a constant B and Nc2-Ncl as a correction value ΔNo; and a means for setting Ncl + ΔNO as the desired engine speed No while the request for abrupt speed change is detected.
Claim 3
Dependent Claim
36 words
An apparatus for controlling a continuously variable transmission as defined in claim 1, wherein the running parameter of the vehicle for calculating the desired engine speed Ns for steady state is an intake throttle position e.
Claim 4
Dependent Claim
41 words
An apparatus for controlling a continuously variable transmission as defined in claim 1, wherein the running parameters of the vehicle for calculating the desired engine speed Ns for steady state are the intake throttle position θ and the vehicle speed V.
Claim 5
Independent Claim
32 words
An apparatus for controlling a continuously variable transmission as defined in any of claims 1 to 3, wherein the request for abrupt speed change is deteected from the intake throttle position e.
Claim 6
Dependent Claim
61 words
An apparatus for controlling a continuously variable transmission as defined in claim 4, wherein the request for abrupt speed change is judged to be addressed when the absolute value |Δθ| of the difference Δθ between the intake throttle position 9 at the present time and the intake throttle position 9 prior to a predetermined time Tc exceeds a predetermined value Xl.
References Cited (Backward Citations)
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