Patent ID: 6514175
Filing Date: 2003-02-04
Classification: B60W,F16H,Y10T

Abstract:
A hydraulic control system for generating an oil pressure by turning a prime mover connected to a hydraulic pump and for outputting an oil pressure instruction signal to an electrically activated pressure modulating mechanism, to modulate the oil pressure generated in said hydraulic pump to an oil pressure according to the instruction signal and to feed the modulated oil pressure to a transmission, comprising:rotating speed raiser for raising a rotating speed of said prime mover while said transmission is not rotated by said prime mover, to increase an output volume of said hydraulic pump; oil pressure instructor for outputting a plurality of instruction signals of different pressure instruction values to said pressure modulating mechanism while the output volume of said hydraulic pump is increased, to output oil pressures at a plurality of pressure levels; oil pressure detector for detecting the oil pressure to be modulated and fed to said transmission, at a plurality of pressure levels; and learning and correction unit for learning and correcting said instruction signals on the basis of the pressure instruction value outputted by said oil pressure instructor and the oil pressure detected by said oil pressure detector.