Method for controlling vehicle with transmission

A transmission and vehicle technology, applied in the direction of engine control, components with teeth, transmission control, etc., can solve problems such as control time, discontinuous shift quality, shift shock, etc.

Active Publication Date: 2014-09-17
FORD GLOBAL TECH LLC
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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
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Method used

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  • Method for controlling vehicle with transmission
  • Method for controlling vehicle with transmission
  • Method for controlling vehicle with transmission

Examples

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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 a method for controlling a vehicle with a transmission, and a system and a method controlling a vehicle powertrain having a transmission to improve shift quality to detect the start of a torque phase of the shift based on a measured transmission input shaft torque. A torque sensor provides a signal to a controller that monitors initial rise time of the measured transmission input shaft 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 and a controller configured to initiate torque phase control when the slope of the transmission input shaft torque exceeds a predetermined threshold after initiation of the shift preparatory phase.

Description

technical field [0001] The present disclosure relates to upshift control of a multi-speed automatic transmission based on measured transmission input torque. 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 the internal combustion engine to the vehicle 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 element (referred to as the offgoing clutch (OGC...

Claims

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Application Information

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IPC IPC(8): F16H59/14F16H61/02
CPCF16H61/04Y10T477/641B60W10/02B60W10/11F16H59/16F16H61/0403F16H61/0437F16H61/684F16H2059/147F16H2061/0429F16H2306/40F16H59/141
Inventor 藤井雄二亚历山大·O·克纳·杰弗森布兰德丽·迪恩·里德尔李承勋格雷戈里·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 FORD GLOBAL TECH LLC
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