Automatic transmission shift control based on transmission input shaft torque signal

A technology of input torque and transmission, which is applied in the direction of engine control, transmission control, combustion engine, etc., can solve the problems of discontinuous shifting in control time, shifting quality, shifting impact, etc., and achieve the effect of reducing shifting shock

Active Publication Date: 2014-09-17
CHANGAN FORD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper coordination of control timing between the OCC and other torque-generative devices results in inconsistent shift quality or perceived shift shock

Method used

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  • Automatic transmission shift control based on transmission input shaft torque signal
  • Automatic transmission shift control based on transmission input shaft torque signal
  • Automatic transmission shift control based on transmission input shaft torque signal

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Embodiment Construction

[0019] As required, specific embodiments of the claimed subject matter are disclosed herein; however, it is to be understood that the disclosed embodiments are merely examples and may be embodied in various and alternative forms. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ embodiments of the claimed subject matter.

[0020] Shifting of multi-speed automatic transmissions occurs simultaneously with the application and / or release of multiple friction elements (such as plate clutches, band brakes, etc.) that change the speed and torque relationship by changing the gear configuration. The friction elements may be hydraulically actuated, mechanically actuated, or actuated by other strategies usi...

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Abstract

The invention relates to automatic transmission shift control based on a transmission input shaft torque signal, and a system and a method for minimizing torque disturbances during a shift event for an automatic transmission control actual transmission input shaft torque using a transmission input shaft signal produced by an input shaft torque sensor. The torque sensor provides a signal to a controller that monitors the measured transmission input torque. The torque sensor may be implemented by a strain gauge, a piezoelectric load cell, or a magneto-elastic torque sensor. The system may include a vehicle powertrain having an engine, a transmission coupled to the engine via a torque converter, an input torque sensor coupled to the input shaft of the transmission and a controller configured to control engine torque to cause the measured transmission input shaft torque to achieve a target transmission input shaft torque during the shift event.

Description

technical field [0001] The present disclosure relates to shift control of a multi-speed automatic transmission based on a transmission input shaft torque signal. Background technique [0002] Multi-speed automatic transmissions in motor vehicle powertrains utilize multiple friction elements to automatically shift gear ratios. Typically, these friction elements can be described as torque building elements, but are more commonly referred to as clutches or brakes. Friction elements establish a power flow path from a torque source, such as an internal combustion engine or traction motor, to the vehicle's traction wheels. During vehicle acceleration, for a given accelerator pedal demand, the overall speed ratio (i.e., the ratio of transmission input shaft speed to transmission output shaft speed) decreases as the speed of the vehicle increases as the transmission upshifts through different ratios. Small. [0003] In the case of a synchronized upshift, the first torque-building...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/14
CPCY02T10/56Y10T477/675B60W10/06Y10T477/641Y10T477/688B60W10/02B60W10/11F16H61/0437F16H61/68F16H63/502F16H2063/508F16H2306/42F16H2063/504
Inventor 亚历山大·奥康纳·吉布森李承勋藤井雄二格雷戈里·迈克尔·皮尔准恩黛安娜·雅娜奇维夫约瑟夫·F·库哈尔斯基尼姆罗德·卡帕斯
Owner CHANGAN FORD AUTOMOBILE CO LTD
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