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公开(公告)号:US20200089261A1
公开(公告)日:2020-03-19
申请号:US16573074
申请日:2019-09-17
Applicant: DENSO CORPORATION
Inventor: Masaaki KONO , Yusuke KIMURA , Fukuo KITAGAWA , Takahiro TOMEDA , Tadayoshi NAKASE , Shinichi KONDO , Kazuhiro SASAO , Masato ARAI , Motoyoshi ANDO
IPC: G05D16/20 , F16K31/06 , G05B19/042
Abstract: 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.
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公开(公告)号:US20240230776A9
公开(公告)日:2024-07-11
申请号:US18400509
申请日:2023-12-29
Applicant: DENSO CORPORATION
Inventor: Fukuo KITAGAWA , Motomasa IIZUKA , Hisayoshi OTA , Masaaki KITAGAWA
IPC: G01R31/389 , H01M10/0587 , H01M10/48 , H01M50/569
CPC classification number: G01R31/389 , H01M10/0587 , H01M10/48 , H01M50/569
Abstract: A battery measurement system includes: a battery including terminals and a housing case, and a battery measurement device. The battery measurement device includes: a signal control unit provided on a first electrical path connecting positive and negative electrode external terminals and configured to receive or apply an AC signal, a response signal input unit provided on a second electrical path connecting positive and negative electrodes of an electrode body and configured to receive a response signal to the AC signal, and a calculation unit configured to calculate complex impedance information based on the response signal. The second electrical path is wired from the response signal input unit toward the inside of the housing case so that a magnetic flux passage area surrounded by the electrode body and the second electrical path is smaller in magnitude than an area surrounded by the electrode body, the terminals and the housing case.
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公开(公告)号:US20200088309A1
公开(公告)日:2020-03-19
申请号:US16569965
申请日:2019-09-13
Applicant: DENSO CORPORATION
Inventor: Masaaki KONO , Takahiro TOMEDA , Fukuo KITAGAWA , Yusuke KIMURA , Tadayoshi NAKASE , Shinichi KONDO , Kazuhiro SASAO , Masato ARAI , Motoyoshi ANDO
Abstract: A spool valve unit includes a sleeve member having a high-pressure port and a low-pressure port, a spool member movably accommodated in the sleeve member in an axial direction, and a spring member for biasing the spool member in a first axial direction. The spool valve unit produces an intermediate fluid pressure to be outputted to an outside of the spool valve unit, when electromagnetic force is applied to the spool member so that the spool member is moved at a high speed between the high-pressure port and the low-pressure port. The spring member is composed of a non-linear spring, a biasing force of which is non-linearly changed with respect to a displacement of the spool member.
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公开(公告)号:US20240133966A1
公开(公告)日:2024-04-25
申请号:US18400509
申请日:2023-12-29
Applicant: DENSO CORPORATION
Inventor: Fukuo KITAGAWA , Motomasa IIZUKA , Hisayoshi OTA , Masaaki KITAGAWA
IPC: G01R31/389 , H01M10/0587 , H01M10/48 , H01M50/569
CPC classification number: G01R31/389 , H01M10/0587 , H01M10/48 , H01M50/569
Abstract: A battery measurement system includes: a battery including terminals and a housing case, and a battery measurement device. The battery measurement device includes: a signal control unit provided on a first electrical path connecting positive and negative electrode external terminals and configured to receive or apply an AC signal, a response signal input unit provided on a second electrical path connecting positive and negative electrodes of an electrode body and configured to receive a response signal to the AC signal, and a calculation unit configured to calculate complex impedance information based on the response signal. The second electrical path is wired from the response signal input unit toward the inside of the housing case so that a magnetic flux passage area surrounded by the electrode body and the second electrical path is smaller in magnitude than an area surrounded by the electrode body, the terminals and the housing case.
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