Downshift logic for semi-automatic mechanical transmission with

Details Downshift logic for semi-automatic mechanical transmission with Downshift logic for semi-automatic mechanical transmission with

1995-08-07

1997-04-15

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

477 79, 477 86, B60K 4124

Patent

active

056203918

ABSTRACT:
A control system and method for a vehicular semi-automatic mechanical transmission system (10) having a clutch operator (30) and an overriding manual clutch control (3) for controlling engagement and disengagement of the master clutch (14) is provided. The control is effective to sense manual clutch disengagement during a downshift and to cease further attempts to cause synchronization by engine fuel manipulation (ES=IS=OS * GR.sub.T) until a change in conditions is sensed.

REFERENCES:
patent: 4527447 (1985-07-01), Richards
patent: 4648290 (1987-03-01), Dunkley et al.
patent: 4714144 (1987-12-01), Speranza
patent: 4930081 (1990-05-01), Dunkley et al.
patent: 5441462 (1995-08-01), Chan
patent: 5441464 (1995-08-01), Markyvech
patent: 5489247 (1996-02-01), Markyvech et al.
patent: 5507372 (1996-04-01), Boardman et al.

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