192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1992-10-23
1994-01-11
Lorence, Richard M.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
192 362, 192 363, 74335, 74336R, B60K 4128, B60K 4122, F16H 6102
Patent
active
052772900
ABSTRACT:
A system for controlling the selection of the operative ratio of a vehicle powershift transmission driven from an engine via a main clutch. The system includes a clutch status sensor for sensing engaged and disengaged conditions of the main clutch. A selector is provided for selecting the operative ratio of the transmission. Also, a control circuit is provided which includes a ratio-change modulating function which, when the main clutch is engaged and a change to a non-adjacent ratio is selected, invokes a serial routine which ensures that each intermediate ratio between the current ratio and the selected ratio is engaged for a moment to ensure a smooth substantially jerk-free progression between the current ratio and the selected ratio. When the main clutch is disengaged and a change to a non-adjacent ratio is selected, the control circuit invokes a direct routine which permits changes from a current ratio to a non-adjacent selected ratio without engagement of any intermediate ratio.
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patent: 5054591 (1991-10-01), Braun
Lorence Richard M.
Massey Ferguson S.A.
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