TRANSMISSION STAGE CHANGE-OVER DEVICE Russian patent published in 1999 - IPC

FIELD: change-over of transmission stages in transport facilities. SUBSTANCE: device includes source of working fluid whose delivery line is connected with valves which ensure selective connection of stage clutch engagement cylinders with pressure source and hydraulic tank by signal of electric stage selector. Device is provided with correcting valve and stage change-over direction sensor which are electrically connected with stage selector and winding of electromagnet which controls correcting valve fitted between pressure source and delivery line; provision is made for additional line connected with delivery line through check valve. EFFECT: avoidance of jerks of transport facilities in change-over of transmission stages at reduced slippage of friction clutches. 8 cl, 12 dwg