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公开(公告)号：US20240048084A1
公开(公告)日：2024-02-08
申请号：US18324222
申请日：2023-05-26
Applicant: DENSO CORPORATION
Inventor： Yuichi SEO , Yuuji HIDAKA
IPC: H02P29/028 , G08B21/18 , G07C5/08 , F02D41/22
CPC classification number: H02P29/028 , G08B21/187 , G07C5/0808 , F02D41/221 , F04D27/001
Abstract: A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter; and a stop suppression unit configured to suppress stop of rotation of the motor by changing a motor control parameter to perform the motor rotation control when the abnormality determination unit determines that an abnormality has occurred in the motor.
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12.发明申请公开(公告)号：US20210207552A1
公开(公告)日：2021-07-08
申请号：US17205365
申请日：2021-03-18
Applicant: DENSO CORPORATION
Inventor： Tomoaki NAKANO , Yuuji HIDAKA , Hirokazu TOYODA
Abstract: A pump control unit controls a fuel pump based on a control target value of an engine. A pump characteristic detection unit acquires a pump characteristic value among pump characteristic values, which indicate an operating state of a fuel pump and include a supplied current to the fuel pump, an applied voltage to the fuel pump, a generated voltage of the fuel pump, and a rotation speed of the fuel pump. A pump characteristic storage unit stores the acquired pump characteristic value together with the control target value. A determination threshold set unit sets a determination threshold value by using at least one of the stored pump characteristic value, the control target value, and a combination of at least two of the control target values. A fuel pump deterioration determination unit determines deterioration of the fuel pump by using the stored pump characteristic value and the determination threshold value.
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公开(公告)号：US20160369810A1
公开(公告)日：2016-12-22
申请号：US15184136
申请日：2016-06-16
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Yuuji HIDAKA , Masaya OOTAKE
CPC classification number: F02M37/08 , F04D5/002 , F04D13/06 , F04D29/026 , F04D29/043 , F04D29/20 , F05D2230/10 , F05D2300/516
Abstract: A fuel pump includes a shaft integrally rotatable with a rotor, and an impeller including a fitting hole to which the shaft is fitted. The shaft includes shaft contact surfaces which contact flat surfaces that form the fitting hole when the shaft rotates. The shaft contact surfaces include grooves formed to extend in a center axis direction of the shaft.
Abstract translation: 燃料泵包括与转子一体旋转的轴和包括安装有轴的装配孔的叶轮。 轴包括轴接触表面，当轴旋转时，该接触表面接触形成配合孔的平坦表面。 轴接触表面包括形成为在轴的中心轴线方向上延伸的槽。
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公开(公告)号：US20160211719A1
公开(公告)日：2016-07-21
申请号：US14914785
申请日：2014-08-21
Applicant: DENSO CORPORATION
Inventor： Yuuji HIDAKA , Masaya OOTAKE , Kiyoshi NAGATA
CPC classification number: H02K7/04 , H02K1/02 , H02K1/2733 , H02K5/12
Abstract: A permanent magnet of a rotor core of a rotor includes a first recess and a second recess, which are formed in an outer wall to correct a dynamic balance of the rotor. The permanent magnet is a bonded magnet that is formed by molding a mixture material, which is a mixture of resin and magnetic powder. The first recess and the second recess are formed at the time of molding the permanent magnet. Furthermore, the first recess and the second recess are formed at two axial ends, respectively, of the permanent magnet.
Abstract translation: 转子的转子芯的永磁体包括形成在外壁上以校正转子的动平衡的第一凹部和第二凹部。 永磁体是通过模制作为树脂和磁性粉末的混合物的混合材料形成的粘结磁体。 第一凹部和第二凹部在成型永磁体时形成。 此外，第一凹部和第二凹部分别形成在永磁体的两个轴向端部处。
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公开(公告)号：US20240044301A1
公开(公告)日：2024-02-08
申请号：US18324241
申请日：2023-05-26
Applicant: DENSO CORPORATION
Inventor： Yuichi SEO , Yuuji HIDAKA
CPC classification number: F02D41/221 , F02D41/3082 , F02D2200/0606 , F02D2200/50
Abstract: A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; and an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter.
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Patent Agency Ranking
公开(公告)号：US20180305539A1
公开(公告)日：2018-10-25
申请号：US15767279
申请日：2016-10-26
Applicant: SUMITOMO BAKELITE CO., LTD. , DENSO CORPORATION
Inventor： Koji KOIZUMI , Yusuke WATANABE , Ryoichi IGAWA , Takahiro OKUYA , Yuuji HIDAKA
IPC: C08L61/06 , C08J5/04 , C08K5/3477
Abstract: A phenolic-resin molding material contains a novolac-type phenolic resin, a hexamethylene tetramin, and an inorganic filler. A total content of a content of the novolac-type phenolic resin and a content of the hexamethylene tetramin is 20 to 55 mass % with respect to an entirety of the phenolic-resin molding material. A content of the inorganic filler is 45 to 80 mass % with respect to the entirety of the phenolic-resin molding material. A content of the hexamethylene tetramin is 17 to 26 pts.mass with respect to an entirety of the novolac-type phenolic resin.
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公开(公告)号：US20180298857A1
公开(公告)日：2018-10-18
申请号：US15767375
申请日：2016-10-26
Applicant: DENSO CORPORATION , SUMITOMO BAKELITE CO., LTD.
Inventor： Takahiro OKUYA , Yuuji HIDAKA , Koji KOIZUMI , Yusuke WATANABE , Ryoichi IGAWA
Abstract: An impeller for a fuel pump is molded by a molding material containing a phenolic resin and an inorganic filler. A content at a minimum spin-spin relaxation time is 70% or higher with respect to a whole when approximating a free induction decay curve, which is obtained by Solid Echo Method in a pulse NMR measurement at 90° C., with a sum of relaxation curves of three components. The content at the minimum spin-spin relaxation time corresponds to a content of a portion of the phenolic resin, which forms the impeller for the fuel pump, where a cross-linking reaction is caused. A swelling amount of the impeller due to a liquid containing a fuel and water decreases as a crosslink density of the phenolic resin increases. The swelling amount of the impeller in the present disclosure is smaller than the swelling amount of an impeller molded by PPS resin.
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公开(公告)号：US20180142653A1
公开(公告)日：2018-05-24
申请号：US15571974
申请日：2016-05-19
Applicant: DENSO CORPORATION
Inventor： Yuuji HIDAKA , Masaya OOTAKE
CPC classification number: F02M37/08 , F02M37/045 , F02M37/10 , F04D5/00 , F04D5/002 , F04D13/06 , F04D29/188 , F04D29/20
Abstract: An outer wall surface of an output end portion includes a pair of first plane surfaces which are formed at different positions in its circumferential direction. An inner wall surface of a fitting hole includes a pair of second plane surfaces which are formed at different positions in the circumferential direction. A clearance between one of the pair of first plane surfaces and one of the pair of second plane surfaces is made larger from one side toward the other side in an axial direction in a state that a rotary shaft and an impeller are concentric with each other.
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公开(公告)号：US20180135640A1
公开(公告)日：2018-05-17
申请号：US15574607
申请日：2016-05-19
Applicant: DENSO CORPORATION
Inventor： Yuuji HIDAKA , Hiromi SAKAI
IPC: F04D29/20
CPC classification number: F04D29/20 , F02M37/08 , F04D5/002 , F04D29/041 , F04D29/053 , F04D29/181
Abstract: A fuel pump includes a motor (20), an impeller (39) that includes a fitting hole (44; 71) fitted to an output end portion (37) of a rotary shaft (31) of the motor (20), and a case (48) that includes a pump chamber (41) receiving the impeller (39), a suction hole (13) passing through the case (48) from the pump chamber (41) to one side in an axial direction of the rotary shaft (31), and a discharge hole (47) passing through the case (48) from the pump chamber (41) to the other side in the axial direction. An outer wall surface of the output end portion (37) includes a pair of first plane surfaces (51, 52) that are parallel to each other. An inner wall surface of the fitting hole (44; 71) includes a pair of second plane surfaces (61, 62; 72, 73), which are parallel to each other on their cross section perpendicular to an axial center (AX2) of the impeller (39) and each of which is engaged with one (51) of the pair of first plane surfaces or the other one (52) of the pair of first plane surfaces when the rotary shaft (31) rotates in a predetermined rotational direction. When a distance between the pair of first plane surfaces (51, 52) is referred to as a two-surface width (S), a value obtained by dividing the two-surface width (S) by an outer diameter (D) of the output end portion (37) is 0.75 or smaller.
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公开(公告)号：US20160369818A1
公开(公告)日：2016-12-22
申请号：US15185142
申请日：2016-06-17
Applicant: DENSO CORPORATION
Inventor： Hiromi SAKAI , Yuuji HIDAKA , Masaya OOTAKE
CPC classification number: F04D29/669 , F02M37/08 , F04D5/002 , F04D13/0693 , F04D29/188 , F04D29/662 , F05D2240/20 , F05D2260/34 , F05D2260/94
Abstract: A fuel pump includes a cylindrical stator having a plurality of windings, a rotor rotatably disposed radially inward of the stator, a shaft integrally rotatable with the rotor, an impeller including a fitting hole to which an end portion of the shaft is fitted, and a balance weight disposed in the impeller. The balance weight is formed so as to be symmetrical about a point of symmetry lying on an axial center of the impeller.
Abstract translation: 燃料泵包括具有多个绕组的圆柱形定子，可旋转地设置在定子的径向内侧的转子，与转子一体旋转的轴;叶轮，其包括装配有轴的端部的装配孔， 平衡重设置在叶轮中。 平衡重被形成为关于位于叶轮的轴向中心上的对称点对称。
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