Electronically controlled automatic transmission

Details Electronically controlled automatic transmission Electronically controlled automatic transmission

1988-04-29

1989-03-28

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

74866, 74869, B60K 4106

Patent

active

048153419

ABSTRACT:
An electronic control circuit memorizes shift patterns of a 2-range and an L-range in addition to a shift pattern of a D-range. An operation switch changes a shift pattern of the electronic control circuit to any shift pattern among those of the D-range, 2-range and L-range when a manual shift lever is in a D-range position. A lock mechanism prevents the manual shift lever from entering a 2-range position and an L-range position. A lock mechanism is releasable. A hydraulic circuit is set to a third speed mode when the manual shift lever is in the D-range position, the circuit is set to a second speed mode when it is in the 2-range position, and the circuit is set to a first speed mode when it is in the L-range position, respectively, in case where the shift valves are not working.

REFERENCES:
patent: 3473404 (1969-10-01), Ross
patent: 3987686 (1976-10-01), Paplaski
patent: 4351206 (1982-09-01), Lemieux et al.
patent: 4474075 (1984-10-01), Kobelt

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