Hydraulic control system for transmissions

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 transmissions, comprising a controller which executes control of:

• 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 instructing 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;
• detecting the oil pressure to be modulated and fed to said transmission, at said plurality of pressure levels;
• and
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted by said detect oil pressure instructing control and the oil pressure detected by said oil pressure detecting control.

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 steps of:

• 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;
• 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;
• detecting the oil pressure to be modulated and fed to said transmission, at said plurality of pressure levels;
• and
• learning and correcting said instruction signals on the basis of to outputted pressure instruction value and the detected oil pressure.

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:

• oil pressure instructor for outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism to output an oil pressure at a predetermined pressure level;
• oil pressure detector for detecting the oil pressure to be modulated and fed to said transmission, at a plurality of pressure levels;
• 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;
• and
• rotating speed raiser for raising the rotating speed of said prime mover when an output timing of said oil pressure instructor is detected.

A hydraulic control system for generating an oil pressure from a hydraulic pump by turning a prime mover, as connected to a transmission capable of selecting a non-running shift position transmitting no power and said 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 said transmission in a vehicle comprising:

• rotating speed raiser for raising the rotating speed of said prime mover, while said non-running shift position is selected and/or where the vehicle is stopped, 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 said 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.

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:

• vehicle speed detector for detecting the speed of a vehicle having said transmission mounted thereon;
• oil pressure instructor for outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism, when the vehicle speed detected by said vehicle speed detector is higher than a predetermined reference vehicle speed and is stable, 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;
• 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.

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 a controller which executes controls of:

• outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism to output an oil pressure at a predetermined pressure level;
• detecting the oil pressure to be modulated and fed to said transmission, at a plurality of pressure levels;
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted by said oil pressure instructing control and the oil pressure detected by said oil pressure detecting control;
• and
• raising the rotating speed of said prime mover when an output timing of said oil pressure instructing control is detected.

A hydraulic control system for generating an oil pressure from a hydraulic pump by turning a prime mover, as connected to a transmission capable of select a non-running shift position transmitting no power and said 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 said transmission in a vehicle comprising a controller which executes controls of:

• raising the rotating speed of said prime mover, while said non-running shift position is selected and/or where the vehicle is stopped, to increase an output volume of said hydraulic pump;
• 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;
• detecting the oil pressure to be modulated and fed to said transmission, at said plurality of pressure levels;
• and
• learning and correcting said instruction signals on the basis of the 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 steps of:
• outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism to output an oil pressure at a predetermined pressure level;
• detecting the oil pressure to be modulated and fed to said transmission, at a plurality of pressure levels;
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted at said oil pressure instructing step and the oil pressure detected at said oil pressure detecting step;
• and
• raising the rotating speed of said prime mover when an output timing of said oil pressure instructing step is detected.

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 a controller which executes controls of:

• detecting the speed of a vehicle having said transmission mounted thereon;
• outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism, when the vehicle speed detected by said vehicle speed detecting control is higher than a predetermined reference vehicle speed and is stable, to output oil pressures at a plurality of pressure levels;
• detecting the oil pressure to be modulated and fed to said transmission;
• and
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted by said oil pressure instructing control and the oil pressure detected by said oil pressure detecting control.

A hydraulic control method 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 steps of:

• outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism to output an oil pressure at a predetermined pressure level;
• detecting the oil pressure to be modulated and fed to said transmission, at a plurality of pressure levels;
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted at said oil pressure instructing step and the oil pressure detected at said oil pressure detecting step;
• and
• raising the rotating speed of said prime mover when an output timing of said oil pressure instructing step is detected.

A hydraulic control method for generating an oil pressure from a hydraulic pump by turning a prime mover, as connected to a transmission capable of selecting a non-running shift position transmitting no power and said 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 said transmission in a vehicle comprising steps of:

• raising the rotating speed of said prime mover, while said non-running shift position is selected and/or where the vehicle is stopped, to increase an output volume of said hydraulic pump;
• 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;
• detecting the oil pressure to be modulated and fed to said transmission, at said plurality of pressure levels;
• and
• learning and correcting said instructing signals on the basis of the pressure instruction value outputted at said oil pressure instruction step and the oil pressure detected at said oil pressure detecting step.

A hydraulic control method 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 steps of:

• detecting the speed of a vehicle having said transmission mounted thereon;
• outputting an instruction signal at a predetermined pressure instruction value to said pressure modulating mechanism, when the vehicle speed detected by said vehicle speed detecting step is higher than a predetermined reference vehicle speed and is stable, to output oil pressures at a plurality of pressure levels;
• detecting the oil pressure to be modulated and fed to said transmission;
• and
• learning and correcting said instruction signals on the basis of the pressure instruction value outputted at said oil pressure instructing step and the oil pressure detected at said oil pressure detecting step.