Control to suspend automatic upper ratio shifting

Details Control to suspend automatic upper ratio shifting Control to suspend automatic upper ratio shifting

1998-11-27

1999-11-30

Ta, Khoi Q.

Machine element or mechanism

Gearing

Interchangeably locked

477 79, F16H 5912

Patent

active

059922567

ABSTRACT:
A partially automated mechanical transmission system (92) having a mechanical transmission (10) with a lower group (first-eighth) of manually shifted ratios and an upper group (ninth-tenth) of ratios with automatic shifting between ratios in the upper group and requiring manual shifting between groups. Control logic is provided to sense a driver intention to retain the transmission engaged in a current engaged upper group ratio until the occurrence of an event, such a manual shift into transmission neutral. In one embodiment, the on/off switch (184) from the cruise control control panel (125) is utilized to provide a signal indicative of operator intent to temporarily suspend automatic upper ratio shifting.

REFERENCES:
patent: 4361060 (1982-11-01), Smyth et al.
patent: 4595986 (1986-06-01), Daubenspeck et al.
patent: 4722248 (1988-02-01), Braun
patent: 4850236 (1989-07-01), Braun
patent: 5179867 (1993-01-01), Sakakibara et al.
patent: 5315900 (1994-05-01), Teeter
patent: 5390561 (1995-02-01), Stine
patent: 5435212 (1995-07-01), Menig
patent: 5481077 (1996-01-01), Clegg et al.
patent: 5795264 (1998-08-01), Steeby et al.

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