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JPH0611031A Expired / Lapsed JP ⏱️ 0.0 years remaining

Shift control method for automatic transmission for vehicle

Assignee: Mitsubishi Motors Corp
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Filing: 1993-04-09
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Granted: —
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Expires: 2013-04-09
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 高速側変速段を確立させていた高速段用クラ ッチの係合を解除しながら、低速側変速段を確立させる 低速段用クラッチを係合させて、タービン回転速度Nt を低速段同期回転速度Ntjに向けて増加させる、車両用 自動変速機のダウンシフトにおいて、エンジンのパワー オン、オフ状態の区別なく同一の変速制御方法により変 速制御を行う。 【構成】 高速段用クラッチの目標タービン回転速度変 化率(Nir)’及び低速段用クラッチの目標タービン回 転速度変化率(Nia)’を設定し、また、タービン回転 速度変化率(Nt)’を検出し、検出した変化率(N t)’が変化率(Nir)’に一致するように高速段用ク ラッチの伝達トルクをフィードバック制御する一方、変 化率(Nt)’が変化率(Nia)’に一致するように低 速段用クラッチの伝達トルクをフィードバック制御し て、ダウンシフトを行う。 (57) [Abstract] [Purpose] While releasing the engagement of the high speed clutch that had established the high speed gear stage, engage the low speed gear clutch that establishes the low speed gear stage to engage the turbine rotation speed. Nt In the downshift of the automatic transmission for a vehicle, which increases the speed toward the low-speed synchronous rotation speed Ntj, the shift control is performed by the same shift control method regardless of whether the engine is on or off. [Configuration] A target turbine rotation speed change rate (Nir) 'of a high speed clutch and a target turbine rotation speed change rate (Nia)' of a low speed clutch are set, and a turbine rotation speed change rate (Nt) 'is set. The rate of change detected (N The transmission torque of the high speed stage clutch is feedback-controlled so that t) 'matches the rate of change (Nir)', while the low speed stage clutch is controlled so that rate of change (Nt) 'matches the rate of change (Nia)'. Feedback control is performed on the transmission torque of to downshift.

Inventors

  • 👤 Kenjiro Fujita
  • 👤 憲次郎 藤田
  • 👤 Katsutoshi Usuki
  • 👤 克俊 臼杵
  • 👤 Katsuhiro Hatta
  • 👤 克弘 八田

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-09 03:34
CPC Classifications
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