Shock control arrangement in hydraulic control system of automat

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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Details

74868, B60K 4110

Patent

active

042743079

ABSTRACT:
In an automatic power transmission having a transmission mechanism including fluid operated frictional units to be actuated to select automatic forward drive and reverse drive gear conditions and make a shift between the first, second and third gear ratios in the automatic forward drive range, a shock control arrangement is provided in the hydraulic control system for the transmission mechanism, comprising a pressure accumulator unit which takes up the fluid pressure to be applied to any of the frictional units during selection of the automatic forward drive range or reverse drive gear position or during upshifting between the aforesaid gear ratios in the automatic forward drive range, and a pressure reducing valve for eliminating or reducing the fluid pressure in one of the frictional units when a fluid pressure is being supplied to another frictional unit during upshifting between the second and third gear ratios in the automatic forward drive range.

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