Transit clutchless shifting of an auxiliary transmission

Details Transit clutchless shifting of an auxiliary transmission Transit clutchless shifting of an auxiliary transmission

1993-04-01

1995-05-02

Kwon, John T.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

74335, F16H 6104

Patent

active

054114500

ABSTRACT:
A system for shifting gears in an auxiliary transmission is provided. The system enables shifting between gears of an auxiliary transmission without stopping the vehicle and without requiring a clutch between drive-line components. The system is activated by the operator while the vehicle is moving and includes safety features that preclude downshifting when the vehicle is traveling above a predetermined speed. The system is fully compatible with automatic main transmissions. An electronic control system monitors the rotational velocities or frequencies of the input and output shafts for clutchless shifting while the vehicle is moving.

REFERENCES:
patent: 3626777 (1971-12-01), Langenbeck
patent: 4527447 (1985-07-01), Richards
patent: 4603596 (1986-08-01), Akashi et al.
patent: 4723727 (1988-02-01), Weber
patent: 4959806 (1990-09-01), Gold
patent: 4991099 (1991-02-01), Markyvech et al.

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