CONTROL MECHANISM OF HST VEHICLE

摘要

PROBLEM TO BE SOLVED: To prevent engine stopping by improving control precision of engine speed in a control mechanism of a hydrostatic transmission(HST) vehicle. SOLUTION: This control mechanism of an HST vehicle is furnished with a command transmitting circuit 11 to respectively transmit a throttle opening command signal SOr and a standard swash plate angle command signal XPrO in accordance with a driving condition, a no-load engine speed computing circuit 12 to compute no-load engine speed in accordance with the throttle opening command signal SOr, an engine load assumption circuit 13 to compute an assumed value TPE of load torque working on an engine 5 in accordance with deflection of the no-load engine speed NEM and actual engine speed NE and a swash plate angle command correction circuit 14 to correct the swash plate angle command signal XPr in accordance with the load torque assumed value TPE.