Automatic transmission control method and system having...

Details Automatic transmission control method and system having... Automatic transmission control method and system having...

2008-07-22

2008-07-22

Le, David D. (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

With clutch control

C477S069000, C477S070000, C477S079000, C477S080000, C477S125000, C477S156000, C477S162000, C477S906000, C701S062000, C701S063000, C701S076000

Reexamination Certificate

active

07402123

ABSTRACT:
In an automatic transmission control system and method, an electronic control unit is programmed to output a command to establish another gear stage different from the gear stage at the time of occurrence of fault-induced disengagement by combination of engagements of the friction elements other than the friction elements to be engaged at the time of occurrence of fault-induced disengagement, and simultaneously output a plurality of commands to establish a plurality of gear stages corresponding to combination of engagements of the friction elements to be engaged and disengaged, respectively, at the gear stage at the time of occurrence of fault-induced disengagement, when the gear stage at the time of occurrence of the fault-induced disengagement is a predetermined gear stage and the friction element undergoing the fault-induced disengagement is not determined.

REFERENCES:
patent: 5790969 (1998-08-01), McKee
patent: 6357289 (2002-03-01), Futawatari
patent: 6634991 (2003-10-01), Itou et al.
patent: 7255019 (2007-08-01), Wheeler et al.
patent: 2006/0030446 (2006-02-01), Nozaki et al.
patent: 2003-269602 (2003-09-01), None

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