Machine element or mechanism – Gearing – Interchangeably locked
Patent
1988-07-18
1990-07-03
Herrmann, Allan D.
Machine element or mechanism
Gearing
Interchangeably locked
74473R, 192109A, F16H 6132, F16H 6134
Patent
active
049380885
ABSTRACT:
It has been proposed to employ a constant mesh gearbox of the kind having pairs of gears on parallel shafts in constant mesh with each other, together with a clutch, in an automatic vehicle transmission. A microprocessor controls actuators for the clutch and throttle and hydraulic actuators for moving the selector rod of the gearbox, in order to give automatic operation of the gearbox.
In accordance with the invention, a constant mesh gearbox of the kind referred is provided with actuating means for moving the selector shaft and, in at least one direction of travel of the selector rod, the actuating means acts via resilient means which is arranged to store the energy of the actuating means when the actuating means is operated but the selector rod is not free to move, the rod being moved by the energized resilient means when the selector rod becomes free. More rapid shifting, and when the gearbox forms part of an automatic transmission, a shorter period of interruption of power, is possible, and reversal of torque during a gearshift can also be avoided.
REFERENCES:
patent: 2157592 (1939-05-01), Casler
patent: 2346820 (1944-04-01), Casler et al.
patent: 2634622 (1953-04-01), Cripe
patent: 2655042 (1953-10-01), Almond
patent: 4428248 (1984-01-01), Broucksou et al.
patent: 4449416 (1984-05-01), Huitema
patent: 4498350 (1985-02-01), Ross
patent: 4690008 (1987-09-01), Klatt
SAE Paper 840055, "Microcomputer Mechanical Clutch and Transmission Control", Watanabe et al, pp. 1-10, prior 7-18-88.
Langley Paul A.
Strange Victor E.
Austin Rover Group Limited
Herrmann Allan D.
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