CONTROLLER OF VEHICLE WITH HYDROSTATIC CONTINUOUSLY VARIABLE TRANSMISSION

摘要

[PROBLEMS] To prevent work efficiency from falling by judging the timing for suppressing overrun of a hydraulic motor, or the like, accurately. [MEANS FOR SOLVING PROBLEMS] Based on a detected traveling direction of a vehicle and pressures (Pa, Pb) of a hydraulic pump (1) detected on the side of respective ports (1a, 1b), pressure difference ?P between the pressure Pa of the hydraulic pump (1) on the delivery port (1a) side and the pressure Pb of the hydraulic pump (1) on the suction port (1b) side is calculated. At least any one of an engine (4) and the hydraulic pump (1) is controlled depending on the pressure difference ?P thus calculated such that overrun of at least any one of the engine (4), the hydraulic pump (1) and a hydraulic motor (2) is suppressed.