Torque converter relative rotation control device

Details Torque converter relative rotation control device Torque converter relative rotation control device

1998-11-03

2000-05-23

Wright, Dirk

Interrelated power delivery controls, including engine control

Clutch control

Condition responsive control

701 68, F16H 6114

Patent

active

060660724

ABSTRACT:
A torque transmission efficiency is improved by controlling a relative rotation of an input element and output element of a torque converter. A tightening pressure of a lockup clutch of the torque converter is feedback-controlled based on a deviation between a target relative rotation speed and a real relative rotation speed. The response of the feedback control is suppressed to a low level so that low frequency rotational fluctuations of the engine do not cause rotational fluctuations of the output element. By processing the target relative rotation speed by a filter variable based on vehicle speed and engine load before calculating the deviation, the ability of the real relative rotation speed to track the target relative rotation speed is not impaired.

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