Method and system for limiting the jolt during gear shifts in a

Details Method and system for limiting the jolt during gear shifts in a Method and system for limiting the jolt during gear shifts in a

1978-12-04

1981-04-21

Love, John J.

Machine element or mechanism

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

Preselected indexed position

180 70R, 192103C, B60K 4104

Patent

active

042625572

ABSTRACT:
Since the maximum jolt amplitude during gear shifts in an automatic transmission occurs when a frictional clutch band is first holding fully and since a mathematical relationship can be established between this maximum amplitude and the amplitude of the jolt while the band is slipping, the maximum permissible jolt amplitude during slippage (R.sub.O) is calculated as a function of the input and output speed of the transmission at the start of the gear shift and the predetermined maximum permissible over-all jolt amplitude (R.sub.max). The actual jolt amplitude is determined continuously, compared to R.sub.O, and the friction band is activated to maintain the actual jolt equal to R.sub.O, while the band is slipping.

REFERENCES:
patent: 3710647 (1973-01-01), Dach et al.
patent: 3752284 (1973-08-01), Brittain et al.
patent: 3759344 (1973-09-01), Blee et al.
patent: 3942393 (1976-03-01), Forster et al.

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