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Patent EP0253657A2 successfully refreshed from Google Patents.
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EP0253657A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of controlling continuously variable automotive transmission

Assignee: Honda Motor Co Ltd
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Filing: 1987-07-15
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Granted: —
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Expires: 2007-07-15
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Abstract

Abstract The transmission ratio of an automotive continuously variable transmission is controlled on the basis of the difference between a target rotational speed of the engine which is preset according to an indication of the driver's intention of acceler-a-tion or deleration and a detected rotational speed of the engine. The gain of the rate of change of the transmission ratio is reduced as the detected rotational speed of the engine becomes higher, and the gain of the rate of change of the transmission ratio is increased as the detected rotational speed of the engine becomes lower. Alternatively, the gain of the rate of change of the transmission ratio is of a relatively small value when the detected rotational speed of the engine is equal to or higher than a preset speed, and the gain of the rate of change of the transmission ratio is of a relatively large value when the detected rotational speed of the engine is lower than said preset speed.

Inventors

  • 👤 Takashi Iino
  • 👤 Kazuya Maki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 01:45
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; B; B60; B60W; B60W10/00; B60W10/04; B60W10/10; B60W10/101; B60W10/103; F16H61/42; F16H61/421; F16H61/423; F16H61/465

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 83 words
A method of controlling a continuously variable transmission in an automobile having an engine by controlling the transmission ratio thereof based on the difference between a target rotational speed of the engine which is preset according to an indication of the driver's intention of acceleration or deleration and a detected rotational speed of the engine, said method comprising the step of: reducing the gain of the rate of change of the transmission ratio as the detected rotational speed of the engine becomes higher.
Claim 2
Independent Claim 83 words
A method of controlling a continuously variable transmission in an automobile having an engine by controlling the transmission ratio thereof based on the difference between a target rotational speed of the engine which is preset according to an indication of the driver's intention of acceleration or deleration and a detected rotational speed of the engine, said method comprising the step of: reducing the gain of the rate of change of the transmission ratio as the detected rotational speed of the engine becomes higher.
Claim 3
Dependent Claim 30 words
A method according to claim 1, wherein the gain of the rate of change of the transmission ratio is increased as the detected rotational speed of the engine becomes lower.
Claim 4
Dependent Claim 75 words
A method according to claim 1 or 2, wherein the gain of the rate of change of the transmission ratio is of a relatively small value when the detected rotational speed of the engine is equal to or higher than a preset speed, and the gain of the rate of change of the transmission ratio is of a relatively large value when the detected rotational speed of the engine is lower than said preset speed.

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