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

IPC: F16K11/07 ,  F16K27/04 ,  F16F1/04 ,  F16K31/56

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.

公开(公告)号：US20220084730A1

公开(公告)日：2022-03-17

申请号：US17474441

申请日：2021-09-14

Applicant: DENSO CORPORATION

Inventor： Shinichi KONDOU ,  Kazuhiro SASAO ,  Masato ARAI

IPC: H01F7/08 ,  H01F7/16 ,  F16K31/06

Abstract: A solenoid valve includes a valve portion and a solenoid portion. The valve portion has a sleeve and a valve body. The solenoid portion includes a tubular coil portion, a magnetic yoke having a side surface portion and a bottom portion, a columnar plunger, a shaft, a stator core having a core shaft hole for sliding the plunger in the axial direction, and a base portion having a base shaft hole. In a radial thickness of the sleeve, a thickness of a part corresponding to an end outer peripheral surface is smaller than a thickness of a sliding portion of an inner peripheral surface of the sleeve, which is a portion on which the valve body slides.

公开(公告)号：US20220375671A1

公开(公告)日：2022-11-24

申请号：US17747438

申请日：2022-05-18

Applicant: DENSO CORPORATION

Inventor： Shodai TOMITA ,  Kazuhiro SASAO ,  Masato ARAI

IPC: H01F7/08

Abstract: A solenoid driving a shaft in a direction along a central axis includes a coil that generates magnetic flux and a magnetic container that accommodates the coil. The container has a side surface portion and a bottom portion. A plunger arranged inside the coil and sliding in a direction along the central axis to move the shaft, and a stator core are provided. The stator core has a plunger accommodating portion and a shaft accommodating portion that accommodates the shaft and attracts the plunger. The plunger accommodating portion has a cylindrical core portion that accommodates the plunger inside, and a flange portion that is provided radially outward at an end of the core portion on the bottom portion side and is welded to the bottom portion of the container. A ring core provided on the opposite side of the shaft accommodating portion to the plunger accommodating portion is provided.

公开(公告)号：US20220128166A1

公开(公告)日：2022-04-28

申请号：US17569234

申请日：2022-01-05

Applicant: DENSO CORPORATION

Inventor： Shinichi KONDOU ,  Masato ARAI ,  Kazuhiro SASAO

IPC: F16K31/06 ,  F16K27/04 ,  H01F7/08 ,  H01F7/16

Abstract: A solenoid valve includes a valve portion and a solenoid portion. The valve portion has a sleeve and a valve body inserted into the sleeve. The solenoid portion includes a stator core having a magnetic attraction core, a sliding core, a magnetic flux passage suppressing portion that suppresses the passage of magnetic flux between the sliding core and the magnetic attraction core, a magnetic yoke, a coil portion, a plunger, and a magnetic tubular base portion. The base portion is fastened to a first outer peripheral surface of an end on the solenoid portion side in the axial direction of the sleeve, is arranged outside a radial direction of a second outer peripheral surface of the end on the valve portion side in the axial direction of the magnetic attraction core, and comes into contact with the yoke inside the yoke.

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.