METHOD AND DEVICE FOR CONTROL OF AUTOMATIC TRANSMISSION Russian patent published in 1999 - IPC

FIELD: control of change-over of automatic transmission. SUBSTANCE: mechanical gear-box having several selectable gear ratios includes input and output shafts, control unit for generation of input signals and for processing of these signals by the preset logic rules for transmission of command output signals to control drives of system, control drive of gear-box inclusive; it is also provided with device for transmission of command signals to control drives for beginning of engagement of pair of rigid engagement parts related at final gear ratio only when expression (OS•GR_T)+K > IS_E> (OS•GR_T) is valid, where OS is output shaft speed, r/min; GR_T is final gear ratio; K is positive number (r/min) and IS_E - is expected speed of input shaft at moment of rigid engagement of pair of rigid engagement parts related with final gear ratio. Proposed method provides for fully or partially automated control of mechanical transmission of transport facility which will have tendency, both at upshift and downshift, to perform engagement of clutch when input shaft is revolving at speed equal to or slightly exceeding synchronous speed. EFFECT: enhanced efficiency. 3 cl, 4 dwg, 1 tbl