Electronic shift control for automatic transmissions

Details Electronic shift control for automatic transmissions Electronic shift control for automatic transmissions

1991-01-25

1992-06-02

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74866, 74878, B60K 4122

Patent

active

051177102

ABSTRACT:
A shift control device of an automatic transmission causes the transmission to be forcedly shifted to a parking range or a neutral range when the shift ranges indicated by a shift instruction signal produced by a range selector and a current shift range signal produced by a detector are not coincident with each other. After such a forced shift, the shift control device tries to shift the transmission once again as formerly instructed by the range selector, and it is detected once again whether the shift ranges indicated by the current shift range signal and the shift instruction signal coincide with each other.

REFERENCES:
patent: 4583171 (1986-04-01), Hara et al.
patent: 4635508 (1987-01-01), Tatsumi
patent: 4771853 (1988-09-01), Nishikawa
patent: 4849899 (1989-07-01), Cote et al.
patent: 4922769 (1990-05-01), Tury

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