公开(公告)号：US20190078566A1

公开(公告)日：2019-03-14

申请号：US16123040

申请日：2018-09-06

Applicant: DENSO CORPORATION

Inventor： Masashi INOUE ,  Yasuhiro TAKEUCHI ,  Yuuji HIDAKA ,  Masatoshi TAKAGI

IPC: F04C2/16 ,  F04C13/00

Abstract: A screw pump has a male screw accommodation hole and a female screw accommodation hole formed in a pump housing. A male screw member and a female screw member are respectively accommodated in the male screw accommodation hole and the female screw accommodation hole. A male-side clearance is formed in a radial direction between the male screw member and the male screw accommodation hole and a female-side clearance is formed in the radial direction between the female screw member and the female screw accommodation hole. The female-side clearance is made to be larger than the male-side clearance, so that the female screw member can easily move in a direction away from the male screw member to the female-side clearance when any extraneous material is going to be wedged between the male screw member and the female screw member, to thereby prevent a locked condition of the screw members.

公开(公告)号：US20160268937A1

公开(公告)日：2016-09-15

申请号：US15032061

申请日：2014-11-10

Applicant: DENSO CORPORATION

Inventor： Yuuji HIDAKA ,  Kiyoshi NAGATA ,  Masaya OOTAKE ,  Hirokazu TOYODA ,  Manabu NOMURA

IPC: H02P6/20 ,  F04D25/06 ,  F02M59/44 ,  H02K7/00

CPC classification number: H02P6/20 ,  F02M59/44 ,  F04D5/002 ,  F04D13/06 ,  F04D15/0066 ,  F04D25/06 ,  F04D29/20 ,  H02K7/003 ,  H02P6/182 ,  H02P6/188 ,  H02P6/22 ,  H02P2203/03

Abstract: A microcomputer of a drive control device for controlling the driving of a brushless motor has a positioning part and a torque acceleration control unit. The positioning unit controls the power to be supplied to the windings, to thereby position the rotor at a drive start position which is a position of the rotor relative to the stator at which the drive control of the brushless motor can start, before starting the drive control of the brushless motor. The torque acceleration control unit controls the power to be supplied to the windings so that a torque acceleration falls within a predetermined range that the collision stress generated when the outer wall of the end of the shaft collides with the inner wall of the hole of an impeller (rotating member) is equal to or smaller than a predetermined value, when the rotor is positioned.

Abstract translation: 用于控制无刷电动机的驱动的驱动控制装置的微型计算机具有定位部和转矩加速控制部。 定位单元控制供给到绕组的功率，从而将转子定位在驱动开始位置，该驱动开始位置是在开始驱动之前转子相对于定子的驱动控制可以启动的位置 控制无刷电机。 转矩加速控制部控制向绕组供给的功率，使得转矩加速度落在在轴的端部的外壁与叶轮的孔的内壁碰撞时产生的碰撞应力的预定范围内 （旋转构件）等于或小于预定值时。

公开(公告)号：US20160118918A1

公开(公告)日：2016-04-28

申请号：US14918770

申请日：2015-10-21

Applicant: DENSO CORPORATION

Inventor： Yuuji HIDAKA ,  Kiyoshi NAGATA ,  Masaya OOTAKE ,  Hirokazu TOYODA ,  Manabu NOMURA

IPC: H02P6/20 ,  H02P1/04

CPC classification number: H02P6/20 ,  H02P1/04 ,  H02P6/18

Abstract: A drive controller that controls a drive of a motor. The drive controller performs a collision force moderation control during a motor start time, during which a collision force in a collision between a shaft outwall with an impeller hole inwall for a positioning is moderated, by changing a power supply at a stage transition time of transiting from a position detection to a position determination. The maximum value of a first output value during a position detection time is set to be greater than a first threshold that at least causes a rotation number of the motor to yield a detectable induction voltage. A second output value during a position determination time is set to be lower than a second threshold that causes a wear or a breakage of an impeller by the collision force.

Abstract translation: 控制电机驱动的驱动控制器。 驱动控制器在电动机起动时间期间执行碰撞力调节控制，在此期间，通过在过渡阶段过渡时间改变电力供应，在轴外壁与用于定位的叶轮孔壁之间的碰撞中的碰撞力被缓和 从位置检测到位置确定。 将位置检测时间期间的第一输出值的最大值设定为大于至少使马达的转数产生可检测的感应电压的第一阈值。 在位置确定时间期间的第二输出值被设置为低于通过碰撞力造成叶轮磨损或破裂的第二阈值。

公开(公告)号：US20240044338A1

公开(公告)日：2024-02-08

申请号：US18324247

申请日：2023-05-26

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO ,  Yuuji HIDAKA

IPC: F04D27/02 ,  H02P29/032

CPC classification number: F04D27/0261 ,  H02P29/032

Abstract: A motor control device configured to control a motor that drives a fuel pump includes a sign detection unit and a vapor suppression unit. The sign detection unit is configured to detect a sign of a vapor lock that is an abnormality in which the fuel pump is unable to discharge a fuel due to a vapor inside the fuel pump. The vapor suppression unit is configured to change a rotation speed of the motor to reduce the vapor inside the fuel pump when the sign detection unit detects the sign of the vapor lock.

公开(公告)号：US20180195523A1

公开(公告)日：2018-07-12

申请号：US15738869

申请日：2016-06-21

Applicant: DENSO CORPORATION

Inventor： Yuuji HIDAKA ,  Masaya OOTAKE

IPC: F04D29/20 ,  H02K7/14 ,  H02K7/04 ,  H02K1/27 ,  H02K5/12 ,  F04D29/043 ,  F04D29/18 ,  F04D29/52 ,  F04D13/06 ,  F04D3/00 ,  F04D5/00

CPC classification number: F04D29/20 ,  F02M37/08 ,  F04D3/005 ,  F04D5/002 ,  F04D13/06 ,  F04D29/043 ,  F04D29/181 ,  F04D29/528 ,  H02K1/22 ,  H02K1/27 ,  H02K1/2733 ,  H02K5/12 ,  H02K7/04 ,  H02K7/14

Abstract: A rotor used for a motor that rotates an impellor of a fuel pump includes a cylindrical bonded magnet that forms a plurality of magnetic poles, an inner core that is a cylindrical component provided inward of the bonded magnet and that has both axial end surfaces exposed to outside, and a rotating shaft that includes a connecting end, which has a pair of flat surfaces parallel to each other and is fitted to the impeller, and that is provided to pass through the inner core inward thereof. A cross section of the connecting end has a centroid coinciding with a rotational axis.

公开(公告)号：US20160238016A1

公开(公告)日：2016-08-18

申请号：US15024132

申请日：2014-09-08

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Yuuji HIDAKA

IPC: F04D29/20 ,  F04D13/06 ,  F04D29/043 ,  F04D3/00 ,  F04D29/52 ,  F04D29/18

CPC classification number: F04D29/20 ,  F04D3/005 ,  F04D5/002 ,  F04D13/06 ,  F04D29/043 ,  F04D29/188 ,  F04D29/528

Abstract: An engaging hole-of an impeller, which receives a shaft, is formed by an impeller first planar surface, which is contactable with a shaft first planar surface, an impeller second planar surface, which is contactable with a shaft second planar surface, and an impeller first curves surface-and an impeller second curved surface, which connect between the shaft first planar surface-and the shaft second planar surface. A first groove and a second groove, which are communicated with the engaging hole, are formed in the impeller first curved surface and the impeller second curved surface, respectively. When the shaft first planar surface contacts the impeller first planar surface upon rotation of the shaft in one direction, the first groove is deformed by an applied force. Thereby, the shaft second planar surface and the impeller second planar surface contact with each other.

Abstract translation: 接收轴的叶轮的接合孔由可与轴第一平面接触的叶轮第一平面形成，与轴第二平面接触的叶轮第二平面，和 叶轮第一曲面和叶轮第二曲面，其连接在轴第一平面和轴第二平面之间。 与叶片第一曲面和叶轮第二曲面分别形成有与接合孔连通的第一槽和第二槽。 当轴第一平面在轴沿一个方向旋转时接触叶轮第一平面，第一凹槽通过施加的力而变形。 由此，轴第二平面和叶轮第二平面相互接触。

公开(公告)号：US20190017475A1

公开(公告)日：2019-01-17

申请号：US16069015

申请日：2017-01-24

Applicant: DENSO CORPORATION

Inventor： Shingo FUKUOKA ,  Kiyoshi NAGATA ,  Hiromi SAKAI ,  Yuuji HIDAKA

IPC: F02M37/14 ,  F02M37/22 ,  F02D41/00 ,  F02D41/30 ,  F02M37/10 ,  G01N27/22 ,  G01N33/28

CPC classification number: F02M37/14 ,  F02D19/084 ,  F02D19/087 ,  F02D41/0025 ,  F02D41/3082 ,  F02D2200/0611 ,  F02M37/10 ,  F02M37/22 ,  F02M37/44 ,  F02M2037/085 ,  G01N27/22 ,  G01N33/2852

Abstract: A fuel pump has a pump function of sucking fuel in a fuel tank and discharging fuel, and a detection function of detecting a capacitance correlated to a concentration of alcohol in fuel in the fuel tank. The fuel pump includes a pump main body that is received in the fuel tank to perform the pump function, a housing electrode that covers the pump main body in the fuel tank, and an outside electrode that is located outside of the housing electrode in the fuel tank. A gap is formed between the outside electrode and the housing electrode to give the capacitance.

公开(公告)号：US20180347526A1

公开(公告)日：2018-12-06

申请号：US15776491

申请日：2016-11-25

Applicant: DENSO CORPORATION

Inventor： Satoshi ITO ,  Daiji FURUHASHI ,  Yuuji HIDAKA ,  Hiromi SAKAI

IPC: F02M37/22 ,  F02M37/10

CPC classification number: F02M37/10 ,  F02M37/22 ,  F02M2037/228 ,  F04C2/08

Abstract: A fuel pump is connected to a suction filter which is provided with a filter connecting portion having a cylindrical hole and a projecting portion protruding radially inward from an inner peripheral wall of the cylindrical hole. The fuel pump suctions the fuel filtered by the suction filter. The fuel pump is provided with a suction port having multiple suction openings at a side of the suction filter so as to suction the fuel therethrough, and a pump connecting portion provided at outer side of the multiple suction openings and connected with the filter connecting portion. The pump connecting portion has an outer peripheral wall of which outer shape corresponds with a shape of the inner peripheral wall, and a dent portion denting inward from the outer peripheral wall, which the projecting portion is engaged with.

公开(公告)号：US20160208747A1

公开(公告)日：2016-07-21

申请号：US14914388

申请日：2014-08-21

Applicant: DENSO CORPORATION

Inventor： Yuuji HIDAKA ,  Masaya OOTAKE ,  Kiyoshi NAGATA

IPC: F02M37/08 ,  F04D29/52 ,  F04D15/00 ,  F04D29/18 ,  F04D3/00 ,  F04D13/06

CPC classification number: F02M37/08 ,  F02D33/003 ,  F02D41/0025 ,  F02D41/3082 ,  F02D2200/0602 ,  F02D2250/02 ,  F02M37/10 ,  F02M37/20 ,  F02M2037/085 ,  F04D3/005 ,  F04D13/06 ,  F04D15/0066 ,  F04D29/181 ,  F04D29/528

Abstract: An ECU of a fuel pump executes a feedback control to drive a motor part and sets a rotation speed of an impeller to become a rotation speed corresponding to the target fuel pressure. The ECU detects whether a vapor is generated in a fuel of a pump chamber of the fuel pump, based on a fuel pressure detected by a pressure sensor. When a generation of the vapor is detected, the ECU sets a rotation speed of the impeller to be higher than the rotation speed under a normal control for a predetermined time with a result that the vapor in the pump chamber and a fuel flow channel is discharged into a vapor discharge hole. Thus, the vapor of the pump chamber is discharged from the vapor discharge hole to an outside of the fuel pump.

Abstract translation: 燃料泵的ECU执行反馈控制以驱动电动机部件并且将叶轮的转速设定为与目标燃料压力相对应的转速。 基于由压力传感器检测到的燃料压力，ECU检测在燃料泵的泵室的燃料中是否产生蒸气。 当检测到蒸汽的产生时，ECU将正常控制下的叶轮的转速设定为高于旋转速度一定时间，结果是泵室内的蒸气和燃料流路被排出 进入蒸汽排放孔。 因此，泵室的蒸气从蒸汽排出孔排出到燃料泵的外部。

公开(公告)号：US20150061446A1

公开(公告)日：2015-03-05

申请号：US14471873

申请日：2014-08-28

Applicant: DENSO CORPORATION

Inventor： Yuuji HIDAKA ,  Kiyoshi Nagata

IPC: H02K1/27

CPC classification number: H02K1/2733 ,  H02K1/28 ,  H02K15/03 ,  H02K2213/03

Abstract: A rotor of a brushless motor used in a fuel pump includes a permanent magnet having first and second ends that are configured to have a thickness ratio so that a degree of margin of those ends, which is a difference between an allowable stress and a temperature stress due to expansion and contraction of a rotor core caused by a temperature change is equal to or greater than a preset value. As a result, a cracking of the permanent magnet on the both ends that is caused by repeated expansions and contractions of the rotor core is prevented.

Abstract translation: 在燃料泵中使用的无刷电动机的转子包括具有第一和第二端的永磁体，该永磁体被构造成具有这样的厚度比，使得作为容许应力和温度应力之间的差的端部的余量 由于由温度变化引起的转子铁心的膨胀和收缩等于或大于预设值。 结果，防止了由转子芯的反复膨胀和收缩引起的两端的永磁体的破裂。