Control apparatus for hydraulically operated vehicular transmiss

Details Control apparatus for hydraulically operated vehicular transmiss Control apparatus for hydraulically operated vehicular transmiss

1997-09-23

1999-09-28

Marmor, Charles A

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477906, 701 62, F16H 6112

Patent

active

059578106

ABSTRACT:
There are prevented shocks that will occur when a switchover speed changing is made to transfer from one speed changing, in the midst of that speed changing, to another speed changing when the input and output speed ratio "Gratio", which serves a control parameter, is not accurately detected. For that purpose, there is used a flag FGFAIL for setting "1" when the input and output speed ratio "Gratio", at the time of non-speed changing, does not lie within a predetermined range based on the gear ratio of the speed stage that is being established at that time. A switchover speed changing in which switching to another speed changing is made during a speed changing is prohibited when FGFAIL=1.

REFERENCES:
patent: 4635508 (1987-01-01), Tatsumi
patent: 4698764 (1987-10-01), Inagaki et al.
patent: 4849899 (1989-07-01), Cote et al.
patent: 4955257 (1990-09-01), Terayama et al.
patent: 5050458 (1991-09-01), Yukovich et al.
patent: 5157607 (1992-10-01), Stainton et al.
patent: 5613921 (1997-03-01), Sugiyama et al.

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