Range control method for lever shifted compound transmissions

Details Range control method for lever shifted compound transmissions Range control method for lever shifted compound transmissions

2005-12-27

2005-12-27

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C701S056000, C701S062000

Reexamination Certificate

active

06979279

ABSTRACT:
A controller-assisted, manually shifted transmission system having a control system and method for controlling automatic range shifts are disclosed. Automatic range shifts are determined by control logic utilizing predetermined logic rules to evaluate transmission system criteria. The control logic determines a set of potential target gear ratios. Engine overspeed tests evaluate the set of potential target gear ratios in combination with the transmission system criteria. The appropriate range shift is determined and executed based on the selected target gear ratio.

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