Control of a displacement machine of a hydrostatic-mechanical to

Details Control of a displacement machine of a hydrostatic-mechanical to Control of a displacement machine of a hydrostatic-mechanical to

1992-03-26

1993-05-04

Herrmann, Allan D.

Machine element or mechanism

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

Preselected indexed position

747301, 74393, 475 72, 60444, F16H 4704

Patent

active

052077365

ABSTRACT:
A process for controlling a hydrostatic adjustment gear (HG) of a hydrostatic-mechanical, continuous, split-output torque shift transmission, where a displacement volume (V.sub.new) is controlled following the engagement of a clutch (K2, K3) of a new gear, taking into consideration a leakage volume (DV.sub.old) in respect to a theoretical displacement volume (V.sub.th), after which the clutch (K2, K3) of the respective previously operating gear, which is still turning, is disengaged, where each new displacement volume (V.sub.new) is determined from the prior leakage volume (DV.sub.old) in accordance with different hydraulic pressure conditions in the adjustment gear (HG) prior to and following the shifting operation, where the setting of the new displacement volume (V.sub.new), which is determined in accordance with the hydraulic pressure conditions from the prior leakage volume (DV.sub.old), takes place in respect to the theoretical displacement volume (V.sub.th) in accordance with a new leakage volume (DV.sub.new). During upshifting and downshifting a differing ratio of the leakage volumes is taken into consideration, which occurs during the shifting process because of falling or rising of the hydraulic pressure. Therefore the disengagement of the clutch (K2, K3) of the prior gear takes place without torque loading during upshifting as well as downshifting.

REFERENCES:
patent: 3204486 (1965-09-01), De Lalio
patent: 3212358 (1965-10-01), De Lalio
patent: 4309917 (1982-01-01), Leet
patent: 4776233 (1988-10-01), Kita et al.
patent: 5052986 (1991-10-01), Jarchow et al.
patent: 5129867 (1992-07-01), Fredriksen et al.
Technische Akademie Esslingen Weiterbildungszentrum, Montag, 3, und Dienstag Dec. 4, 1990; Veranstaltungsort Ostfildren (Nellingen) Akademiegebaude, In den Anlagen 5; Lehrgang Nr. 13309/62.175 "Stufenlose Getriebe in Fahrzeugen".

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