Electronic clutch-to-clutch transmission control system

Details Electronic clutch-to-clutch transmission control system Electronic clutch-to-clutch transmission control system

2006-06-06

2006-06-06

Marmor, Charles A. (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S154000, C475S125000, C701S067000

Reexamination Certificate

active

07056263

ABSTRACT:
A transmission system includes a first clutch, a second clutch, and a controller. The controller communicates with the first and second clutches and commands a gear shift. The controller calculates a torque phase time for the gear shift and determines a desired torque trajectory within said torque phase time. The controller determines on-coming torque values for the second clutch and off-going torque values for the first clutch to achieve the desired torque trajectory within the torque phase time. The controller calculates an on-coming clutch pressure based on the on-coming torque value, and an off-going clutch pressure based on the off-going torque value. The controller delays actuation of the first and second clutches to compensate for hydraulic delays.

REFERENCES:
patent: 5304102 (1994-04-01), Narita et al.
patent: 5368531 (1994-11-01), Ando et al.
patent: 5779594 (1998-07-01), Minowa et al.
patent: 6243637 (2001-06-01), Minowa et al.
patent: 6334833 (2002-01-01), Ochi et al.
patent: 6503165 (2003-01-01), Kubo et al.
patent: 2001/0016539 (2001-08-01), Yuasa et al.

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