Torque converter lockup capacity control device

Details Torque converter lockup capacity control device Torque converter lockup capacity control device

2007-09-04

2007-09-04

Wright, Dirk (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

With fluid drive

Reexamination Certificate

active

11232237

ABSTRACT:
A torque converter lockup capacity control device is configured to conduct coast-time lockup control during coast-running in order to prevent engine stall, shock from occurring in the output shaft of a transmission due to lockup when a driver releases an acceleration pedal and the running condition switches from a drive running condition to a coast-running condition. Torque converter lockup occurs because the engine output torque drops from a time on when the throttle opening degree becomes zero. Thus, during a period from the time on until fuel cut-in at time, the lockup capacity is lowered to a minimum capacity corresponding to a standby pressure and lockup is avoided. The lockup capacity is raised to a larger value from the predetermined time on, and ordinary coast-time lockup control is executed.

REFERENCES:
patent: 5620394 (1997-04-01), Iizuka
patent: 5935043 (1999-08-01), Watanabe et al.
patent: 6663533 (2003-12-01), Toyoda et al.
patent: 6780140 (2004-08-01), Okamoto et al.
patent: 2001-208193 (2001-08-01), None

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