Hydraulic control system for transmissions
First Claim
1. 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 valve 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.
1 Assignment
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Accused Products
Abstract
A hydraulic control system for outputting an oil pressure instruction signal to a pressure modulating mechanism, to modulate the oil pressure generated in the hydraulic pump to an oil pressure according to the instruction signal and to feed the modulated oil pressure to a transmission. The hydraulic control system comprises: a rotating speed raising unit for raising the rotating speed of the prime mover while the transmission is not rotated by the prime mover, to increase an output volume of the hydraulic pump; an oil pressure instructor for outputting a plurality of instruction signals of different pressure instruction values to the valve modulating mechanism while the output volume of the hydraulic pump is increased; an oil pressure detector for detecting the oil pressure to be modulated and fed to the transmission, at a plurality of pressure levels; and a learning corrector for learning and correcting the instruction signals on the basis of the outputted pressure instruction value and the detected oil pressure detected.
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Citations
22 Claims
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1. 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:
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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 valve 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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:
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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 valve 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 a plurality of pressure levels; and
learning and correcting said instruction signals on the basis of the pressure instruction value outputted by said detecting oil pressure instructing control and the oil pressure detected by said oil pressure detecting control.
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13. 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:
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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 valve 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 a plurality of pressure levels; and
learning and correcting said instruction signals on the basis of the outputted pressure instruction value and the detected oil pressure.
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14. 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:
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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.
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15. 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 a transmission, comprising:
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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 valve 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.
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16. 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:
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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.
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17. 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:
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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.
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18. 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 a transmission, comprising a controller which executes controls of:
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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 valve 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 a plurality of pressure levels; 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.
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19. 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:
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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.
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20. 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:
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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.
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21. 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 a transmission, comprising steps of:
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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 valve 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 a plurality of pressure levels; 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.
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22. 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:
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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.
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Specification