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.

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：US20150380143A1

公开(公告)日：2015-12-31

申请号：US14740600

申请日：2015-06-16

Applicant: DENSO CORPORATION

Inventor： Katsuhiro SAIKI ,  Akinori HIRANO ,  Shinichi KONDO

IPC: H01F7/16 ,  F16K31/06 ,  H01F7/129

CPC classification number: H01F7/1607 ,  F16K27/029 ,  F16K27/048 ,  F16K31/0613 ,  F16K31/0668 ,  F16K31/0675 ,  F16K31/0693 ,  H01F7/081 ,  H01F7/129 ,  H01F2007/086

Abstract: A linear solenoid has a coil assembly, a plunger, a stator core, and an elastic member. The coil assembly has a coil provided by a conducting wire. The plunger is disposed inside of the coil assembly and is movable in an axial direction. The stator core has a guiding portion guiding the plunger to move in the axial direction, an attracting portion attracting the plunger by generating a magnetic attractive force when the coil is energized, and a blocking portion blocking a magnetic field between the guiding portion and the attracting portion. The elastic member has an annular shape and is disposed between the blocking portion and the coil assembly. The elastic member is in contact with both an outer wall surface of the blocking portion and an inner wall surface of the coil assembly entirely in a circumferential direction of the elastic member.

Abstract translation: 线性螺线管具有线圈组件，柱塞，定子芯和弹性构件。 线圈组件具有由导线提供的线圈。 柱塞设置在线圈组件的内部并且可以在轴向方向上移动。 定子铁芯具有引导柱塞沿轴向移动的引导部分，当线圈被通电时通过产生磁吸力而吸引柱塞的吸引部分，以及阻挡引导部分和吸引力之间的磁场的阻挡部分 一部分。 弹性构件具有环形形状并且设置在阻挡部分和线圈组件之间。 弹性构件与弹性构件的圆周方向上的阻塞部分的外壁表面和线圈组件的内壁表面两者接触。