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AssigneeDenso Corporation
InventorsMasaaki KONO, Yusuke KIMURA, Fukuo KITAGAWA, Takahiro TOMEDA, Tadayoshi NAKASE, Shinichi KONDO, Kazuhiro SASAO, Masato ARAI, Motoyoshi ANDO
Estimating the term…
A current control device includes a target setting unit, a storage unit, an oil pressure ratio calculation unit, a specific current detection unit and a correction unit. The target setting unit adds a dither amplitude to a target current so that the current of the solenoid periodically changes at a dither cycle period longer than a PWM cycle period of the solenoid. The storage unit stores a stroke-current relationship between a stroke of the spool and the current of the solenoid. The oil pressure ratio calculation unit calculates an oil pressure ratio which is a value calculated by dividing an amplitude of the output oil pressure by an average value of the output oil pressure. The specific current detection unit detects a specific current based on the oil pressure ratio. The correction unit corrects the stroke-current relationship based on the specific stroke and the specific current.
A current control device for controlling a current of a solenoid of a solenoid valve, in which a spool is moved in an axial direction inside a sleeve in accordance with a current supplied to the solenoid to regulate an output oil pressure, one of an input port and an output port of the sleeve which is opened and closed by the spool is defined to be a specific port, a stroke of the spool at which the spool momentarily closes the specific port is defined to be a specific stroke, and the current of the solenoid corresponding to the specific stroke is defined to be a specific current, the current control device comprising an electronic control unit configured to execute processing of:
A current control device for controlling a current of a solenoid of a solenoid valve, in which a plurality of sliding members are moved in an axial direction in accordance with a current supplied to the solenoid to regulate an output oil pressure, the current control device comprises an electronic control unit configured to execute processing of:
A current control device for controlling a current of a solenoid of a solenoid valve, in which a spool is moved in an axial direction in accordance with a current supplied to the solenoid to regulate an output oil pressure, the current control device comprising an electronic control unit configured to execute processing of:
Dependencies are inferred from the claim text.