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公开(公告)号：US20220010762A1
公开(公告)日：2022-01-13
申请号：US17293735
申请日：2019-12-23
Applicant: Hitachi Astemo, Ltd.
Inventor： Kazuhiro ORYOJI , Yoshihiko AKAGI , Hidefumi IWAKI
Abstract: Due to changes in a flow of an air-fuel mixture in a cylinder, reliable ignition due to spark discharge may not be possible. Therefore, an ignition control unit 24 includes a secondary voltage calculation unit 31 that calculates an average value of a secondary voltage generated on a secondary side of an ignition coil, an irregular flow ratio calculation unit 32 that calculates a ratio of cycles in which the average value of the secondary voltage is equal to or less than a set average value with respect to a cycle of the internal combustion engine in a predetermined period as an irregular flow ratio indicating that the flow of the air-fuel mixture in the cylinder is irregular, and an ignition operation amount correction unit 37 that corrects an ignition operation amount so that the irregular flow ratio is equal to or less than the set ratio value that is the target to be reached of the irregular flow ratio.
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公开(公告)号：US20220009463A1
公开(公告)日：2022-01-13
申请号：US17295171
申请日：2019-08-22
Applicant: Hitachi Astemo, Ltd.
Inventor： Yasushi KINOSHITA , Kengo SUZUKI , Atsushi ODAIRA , Haruhiko FUJITA
IPC: B60T13/74 , B60T17/22 , F16D55/226 , F16D66/00 , F16H25/22
Abstract: An object of the present invention is to provide an electric brake with excellent operability, in which a compact brake thrust detection sensor is installed. To achieve the object, the electric brake of the present invention includes a rotary shaft rotated by the rotational force, a piston axially moved by a translational force converted from rotation of the rotary shaft, a brake pad pressed against a disc in accompany with a translational motion of the piston, a thrust bearing which receives a thrust load applied to the rotary shaft, and a support member which axially supports the thrust bearing. The thrust bearing includes a first bearing washer which is in contact with the rotary shaft to receive the thrust load, and rotates integrally with the rotary shaft, a second bearing washer fixed to the support member, and multiple rolling elements held between the first bearing washer and the second bearing washer. The second bearing washer has its surface in contact with the support member provided with a supported portion that is in contact with the support member, and a non-supported portion that is not in contact with the support member. A strain sensor is disposed on the non-supported portion.
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公开(公告)号：US20220006385A1
公开(公告)日：2022-01-06
申请号：US17283319
申请日：2019-11-01
Applicant: HITACHI ASTEMO, LTD.
Inventor： Nobuyuki KUROIWA
IPC: H02M3/335
Abstract: A load driving device includes a flyback converter, the flyback converter including: a transformer including a primary coil to be connected to a power supply and a secondary coil to be connected to a load; and a switching element provided on a ground side of the primary coil, which controls a voltage to be applied to the primary coil. The load driving device is configured to generate a comparison voltage (Vc) which is lower than a voltage (Vds) between the primary coil and the switching element, and to change a drive signal (Vgs) for the switching element to switch the switching element from an OFF state to an ON state when (time tc) the comparison voltage (Vc) is reduced to a predetermined voltage (ground potential).
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公开(公告)号：US20210408804A1
公开(公告)日：2021-12-30
申请号：US17294557
申请日：2019-10-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomonori KANAI , Hikaru MIURA
Abstract: A cell controller includes: a balancing unit which performs balancing of states of charge of a plurality of secondary batteries by discharging or charging each of the plurality of secondary batteries; a first timer which measures an elapsed time after a start of the balancing; a receiving unit which receives a balancing command signal including information regarding balancing times for the secondary batteries; and a first control unit which controls the balancing unit on a basis of the elapsed time after the start of the balancing, and the balancing command signal, the elapsed time being measured by the first timer and the balancing command signal being received by the receiving unit, in which the receiving unit receives the information on the plurality of secondary batteries through the single balancing command signal.
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公开(公告)号：US20210396191A1
公开(公告)日：2021-12-23
申请号：US17289782
申请日：2019-10-11
Applicant: Hitachi Astemo, Ltd.
Inventor： Akiyasu MIYAMOTO , Takao MIYAKE , Ryo KUSAKABE
Abstract: An object of the present invention is to promote the stabilization of the fuel injection amount in a fuel injection device in which a valve body and a movable iron core are configured to be relatively displaceable. In a control unit 120 of a fuel injection device 100 which includes a control part that controls the energization time of a current flowing through a coil 108 based on the pulse width of a drive command pulse, the control part is configured to be able to execute control to split a required fuel injection amount for one combustion cycle into portions and inject the portions in a plurality of times. In addition, in injections including a sequence of a preceding drive command pulse Pi1 and a subsequent drive command pulse Pi2, the control part acquires a preceding drive command pulse width Ti1 of the preceding drive command pulse Pi1 and a pulse interval Tint that is the time between the end time te1 of the preceding drive command pulse Pi1 and the start time ts2 of the subsequent drive command pulse Pi2, and corrects the subsequent drive command pulse width Ti2 of the subsequent drive command pulse Pi2 by using the preceding drive command pulse width Ti1 and the pulse interval Tint.
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Patent Agency Ranking
公开(公告)号：US20210396165A1
公开(公告)日：2021-12-23
申请号：US16650192
申请日：2020-02-21
Applicant: HITACHI ASTEMO, LTD.
Inventor： Masahumi KURITA , Takashi HIRANO , Masaharu KITAMURA
Abstract: A balancer apparatus equipped with an oil pump includes a pump housing including a pump containing chamber provided therein, a pump forming member contained in the pump containing chamber and configured to discharge oil introduced from an intake portion from a discharge portion to an oil passage of the internal combustion engine when a rotational force is transmitted thereto, a control oil chamber provided between the pump containing chamber and the pump forming member in a radial direction with respect to a rotational axis of the pump forming member and configured to change a hydraulic pressure of the oil to be discharged from the pump forming member with the aid of the oil introduced therein after being discharged from the discharge portion, passing through an oil passage of the internal combustion engine, and being subjected to a pressure adjustment, and a balancer housing including a bearing retainer portion configured to transmit the rotational force from the internal combustion engine to the pump forming member. The bearing retainer portion supports a balancer shaft disposed along the rotational axis of the pump forming member. The balancer housing is attached to the pump housing in a direction of the rotational axis of the pump forming member. The balancer apparatus equipped with the oil pump further includes a plurality of oil passage opening portions formed together on one side surface of the balancer housing and each connected to an oil passage connected to a main oil gallery of the internal combustion engine. The plurality of oil passage opening portions includes a discharge oil passage opening portion of a discharge oil passage connecting the discharge portion and the main oil gallery of the internal combustion engine to each other, a feedback oil passage opening portion of a feedback oil passage connecting the main oil gallery of the internal combustion engine and the control oil chamber to each other, and a bearing oil passage opening portion of a bearing oil passage connecting the main oil gallery of the internal combustion engine and the bearing retainer portion to each other.
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公开(公告)号：US20210394577A1
公开(公告)日：2021-12-23
申请号：US17279117
申请日：2019-08-23
Applicant: HITACHI ASTEMO, LTD.
Inventor： Toru UCHINO
IPC: B60G17/052
Abstract: An air suspension system includes: an air suspension interposed between a vehicle body and an axle to adjust a vehicle height according to supply and exhaust of air; a compressor that compresses air; a tank that stores the air compressed by the compressor; and an air dryer provided on an ejection side of the compressor. When the tank has a predetermined pressure or less after air is supplied from the tank to the air suspension, a pressure of the tank is increased by the compressor.
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公开(公告)号：US20210387632A1
公开(公告)日：2021-12-16
申请号：US17283144
申请日：2019-09-20
Applicant: HITACHI ASTEMO, LTD.
Inventor： Toshiharu SUGAWARA , Ryoh INABA , Hidehiro TOYODA
IPC: B60W50/038 , B60W30/10 , B60W50/14
Abstract: A vehicle control system capable of ensuring safety at a low cost even when a control device fails, includes a first control device that implements at least two automatic driving-related functions based on information from external sensors and/or information from a map database, a second control device that implements fewer automatic driving-related functions than the first control device based on the information from the sensors and/or the map database, and a vehicle motion control device that automatically controls a driving state of a host vehicle based on a function planned by the first or second control device including: a backup determination unit that determines whether the future function planned by the first or second control device is backed up by the second control device; and an interface that notifies a driver that system responsibility is switched to the driver, when the backup is not available.
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公开(公告)号：US20210384787A1
公开(公告)日：2021-12-09
申请号：US17282459
申请日：2019-09-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiromitsu OKAMOTO , Kenichi NAKAYAMA , Kenji NAKAYAMA , Toshiyuki TAKANO , Yoshio OZEKI , Hideaki KOBAYASHI
Abstract: An object of the present invention is to improve the reliability of a rotating electric machine. A stator of a rotating electric machine includes a stator core on which teeth and slots are provided on a cylindrical inner surface, a plurality of windings arranged inside the slot, and slot liners disposed between an inner wall of the slot and the plurality of windings. Each of the plurality of windings has a first surface formed along a radial direction of the stator core and a second surface formed along a circumferential direction, the slot has a first inner wall facing the first surface, and a second inner wall facing the second surface, an adhesive layer expanded by processing is formed on a front surface of the slot liner, when an area of the first surface is larger than an area of the second surface, a distance between the first surface and the first inner wall is smaller than a distance between the second surface and the second inner wall, and when the area of the first surface is smaller than the area of the second surface, the distance between the first surface and the first inner wall is larger than the distance between the second surface and the second inner wall.
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公开(公告)号：US20210384779A1
公开(公告)日：2021-12-09
申请号：US17287839
申请日：2020-01-08
Applicant: Hitachi Astemo, Ltd.
Inventor： Akeshi TAKAHASHI , Minori NAGATA , Masanori SAWAHATA
Abstract: An object of the present invention is to provide a highly efficient and highly reliable rotary electric machine. A rotary electric machine includes: a stator around which a plurality of coils are wound; and a rotor which is supported to be freely rotatable with a predetermined gap with respect to the stator. The coil has at least one connection portion per turn in a slot of the stator. Conductors to be connected mutually have steps at the connection portion, and are fitted with other conductors so as to mutually fill the steps. The steps have contact surfaces that come into contact with each other in the slot to be electrically conducted. A thermally expandable sheet capable of pressurizing the coil in a radial direction of the stator is arranged in the slot.
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