-
公开(公告)号：US11603779B2
公开(公告)日：2023-03-14
申请号：US17282507
申请日：2019-09-10
Applicant: HITACHI ASTEMO, LTD.
Inventor： Koji Saga , Tadao Nakamura
Abstract: An oil pump includes a pump component, a valve container, a valve mechanism, and a circumvention passage. The valve container includes a through hole establishing communication between an inside and an outside of the valve container. The valve mechanism includes: a valve body contained in the valve container; a valve element contained movably in the valve body; a back pressure chamber disposed to face a first valve end of the valve element; a drive mechanism disposed to face a second valve end of the valve element and structured to generate a drive force to move the valve element; and an aperture positioned higher in a vertical direction than the through hole and formed in the valve body so as to establish communication between the back pressure chamber and the inside of the valve container. The circumvention passage establishes communication between the through hole and the aperture.
-
公开(公告)号：US20230070909A1
公开(公告)日：2023-03-09
申请号：US17799995
申请日：2021-01-29
Applicant: Hitachi Astemo, Ltd.
Inventor： Koki TAKIMOTO , Daisuke GOTO , Takuya USUI
IPC: B60T8/172 , B60T13/74 , F16D65/18 , B60T1/06 , F16D55/226
Abstract: Left front electric brake mechanisms apply a braking force to a left front wheel by actuating an “electric motor of a first left front electric brake mechanism” and an “electric motor of a second left front electric brake mechanism” controllable independently of each other. A first ECU (a control portion) acquires a target thrust force instruction value to be generated on the left front electric brake mechanisms based on a target braking force to be applied to the left front wheel. The first ECU (the control portion) outputs a first control instruction for actuating the electric motor of the first left front electric brake mechanism and a second control instruction for actuating the electric motor of the first left front electric brake mechanism according to a change amount of the target thrust force instruction value.
-
公开(公告)号：US20230067913A1
公开(公告)日：2023-03-02
申请号：US17797215
申请日：2021-02-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Keiji HAMADA
Abstract: An electric drive device of the present invention has: a connector assembly 13 having external terminal forming portion 13B, 13S; a metal cover 12 accommodating connector assembly 13 with external terminal forming portion 13B, 13S exposed; an annular seal portion 23 having an annular seal groove 31 in which metal cover 12 and connector assembly 13 are sealed; and a plurality of fixing bolts 21 fixing connector assembly 13 to a housing 11. Annular seal groove 31 is formed in region that connects two fixing bolts 21 in a straight line. Since annular seal groove 31 is formed in the straight region connecting the two fixing bolts 21, warp of region where annular seal portion 23 is formed is corrected by the fixing bolts 21, thereby securing good sealing performance between annular seal portion 23 of connector assembly 13 and an annular protruding edge portion 28P of metal cover 12.
-
公开(公告)号：US20230057416A1
公开(公告)日：2023-02-23
申请号：US17793557
申请日：2021-01-26
Applicant: Hitachi Astemo, Ltd.
Inventor： Satoshi ISHII , Mina AMO
IPC: C10M169/04 , C10M149/14 , F16F9/53 , F16F9/18
Abstract: To provide an electro-rheological fluid and a cylinder device, which each can achieve both high heat resistance and a high ER effect. The electro-rheological fluid (300) of the present invention includes a fluid (30) and polyurethane particles (31) containing metal ion. The polyurethane particles (31) are each composed of polyol and two or more types of isocyanates. A hard segment ratio of the polyurethane particle (31) is 13 to 34%.
-
公开(公告)号：US20230055023A1
公开(公告)日：2023-02-23
申请号：US17785783
申请日：2020-12-15
Applicant: HITACHI ASTEMO. LTD.
Inventor： Koichi ANDO
Abstract: Provided are an electronic control device and a vehicle control system capable of reducing a calculation amount and improving reliability of a travel route of a vehicle as compared with a conventional course setting device. An electronic control device 200 is mounted on a vehicle 100. The electronic control device 200 includes a map processing device 210 connected to an external sensor 110 that recognizes an obstacle around the vehicle 100 and a position sensor 120 that acquires position information of the vehicle 100 in a manner capable of information communication. The map processing device 210 includes a storage device 212 that stores map information including travel route information of the vehicle 100. The map processing device 210 records a travel route along which the vehicle 100 avoids an obstacle in the storage device 212, classifies the obstacle into a permanent obstacle and a transient obstacle, and updates the travel route information with an avoiding route based on the travel route along which the vehicle 100 has avoided the permanent obstacle.
-
Patent Agency Ranking
公开(公告)号：US20230029119A1
公开(公告)日：2023-01-26
申请号：US17784560
申请日：2020-12-11
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichiro TOKUO , Hiroyuki YAMADA , Kiyotaka OGURA , Shingo TAMURA , Yuto ISHIZUKA
Abstract: Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism.
A discharge valve mechanism 500 includes a valve seat portion 51 having a primary-side flow path, a valve body 52 which can be seated on and separated from the valve seat portion 51, and a guide portion 542a which is formed to be slidable on an outer surface of the valve body 52 and guides movement of the valve body 52 in a contacting/separating direction with respect to the valve seat portion 51. The guide portion 542a includes a portion in which a gap from the outer surface of the valve body 52 is set to a predetermined value or less. A first secondary-side flow path 545 which allows an internal space 541a on an upstream side of the guide portion 542a to communicate with an external flow path 2g is formed to allow the fluid to flow out to a side in a moving direction of the valve body 52, and a second secondary-side flow path 546 which allows an internal space 543a on a downstream side of the guide portion 542a to communicate with the external flow path 2g is formed to allow the fluid to flow out to the side in the moving direction of the valve body 52.-
公开(公告)号：US20230025307A1
公开(公告)日：2023-01-26
申请号：US17785101
申请日：2020-12-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Khai Piau LIM , Shinji SUZUKI
IPC: F16D65/00 , F16D55/226
Abstract: This disc brake includes a mounting member, a pair of brake pads, a caliper, a cover member, and a locking member. The caliper includes a cylinder part having a cylinder hole in which a piston for moving one of the pair of brake pads is disposed, a bridge part extending across an outer circumferential surface of a disc from the cylinder part, a plurality of claw parts formed on an extended distal end side of the bridge part and disposed to face the cylinder part, and a recessed part provided between the plurality of claw parts, having an opening at a disc radial direction inner end, and formed to face the cylinder hole. The locking member includes a fixing part fixed to the cover member, and a plurality of locking pieces extending from the fixing part in a direction inclined with respect to a movement direction of the piston.
-
公开(公告)号：US20230024138A1
公开(公告)日：2023-01-26
申请号：US17786626
申请日：2020-12-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazutami TAGO , Itsuki SHIMURA , Junnosuke NAKATSUGAWA , Wataru YOKOYAMA , Ippei SUZUKI
Abstract: A rotary electric machine includes a stator including a coil, and a rotor in an inner peripheral side of the stator. The rotor core comprises a soft magnetic metal and a magnet within a magnet insertion hole, a first magnet stopper on a q axis side of the magnet in the magnet insertion hole, a magnet accommodation between the first magnet stopper on both sides of the magnet insertion hole, a first space portion communicating with the magnet insertion hole, a second space portion whose distance from the magnet is equal to or less than a thickness of the magnet and a radial length of a magnetic pole center is long, the second space portion formed on an inner peripheral side relative to the magnet, and a third space portion that has a convex shape on an inner peripheral side of a q axis of the magnet.
-
公开(公告)号：US11560061B2
公开(公告)日：2023-01-24
申请号：US17284889
申请日：2019-09-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Noriya Nakao , Fumikazu Takahashi , Kenichi Yoshida
Abstract: A motor drive device includes a power conversion circuit that drives an AC motor and a controller that controls the power conversion circuit. The controller includes a command current calculation unit generating a command current according to command torque for the AC motor and a current control unit that performs feedback control for adjusting a current applied to the AC motor to the command current. The controller also includes a control gain setting unit that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain.
-
公开(公告)号：US20230017402A1
公开(公告)日：2023-01-19
申请号：US17783204
申请日：2020-12-04
Applicant: HITACHI ASTEMO, LTD
Inventor： Kiyoharu OZAKI , Toshiaki TAKAI
Abstract: Leakage of radio-frequency radiation noise radiated from a noise source to the outside is suppressed. An electronic control device 1 includes a printed board 101 having signal grounds 104a, 104b, and 104c, and a frame ground 103a, a housing 100 accommodating the printed board 101, and a connector 105 mounted on the printed board 101. The electronic control device 1 includes a first coupling portion 301 that AC-couples the signal ground 104a with the frame ground 103a and a second coupling portion 301 that electrically couples the frame ground 103a with the housing 100, and the first coupling portion 301 and the second coupling portion 301 are provided between the connector 105 and an electronic circuit 110 on the printed board 101.
-
-
-
-
-
-
-
-
-
Search Results
1735
records
(took 0.04 seconds)
