公开(公告)号：US20160333878A1

公开(公告)日：2016-11-17

申请号：US15154064

申请日：2016-05-13

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C29/00 ,  F04C15/00 ,  F02M59/12 ,  F04C2/10

CPC classification number: F04C29/0021 ,  F02M37/08 ,  F04C2/102 ,  F04C13/005 ,  F04C15/0061 ,  F04C15/0065 ,  F04C2210/203 ,  F04C2230/60 ,  F04C2240/30 ,  F04C2240/40

Abstract: A fuel pump includes an inner rotor, an outer rotor, a casing, and a housing. The inner rotor includes outward teeth. The outer rotor includes inward teeth geared with the outward teeth. The casing houses the inner rotor and the outer rotor, and forms a variable capacity pump chamber between the inward teeth and the outward teeth. The housing is formed in a cylindrical shape and includes a cylindrical inner portion, the casing being press fit into the cylindrical inner portion. A recessed portion is formed at a predetermined position in a circumferential direction of an outer circumferential surface of the casing, the recessed portion being recessed toward a radial direction center of the outer circumferential surface.

Abstract translation: 燃料泵包括内转子，外转子，壳体和壳体。 内转子包括向外的齿。 外转子包括与外齿啮合的向内齿。 壳体容纳内转子和外转子，并且在内齿和外齿之间形成可变容量的泵室。 壳体形成为圆筒形，并且包括圆筒形内部，壳体压配合到圆筒形内部。 在壳体的外周面的周向的规定位置形成有凹部，该凹部向外周面的径向中心凹入。

公开(公告)号：US20160305425A1

公开(公告)日：2016-10-20

申请号：US15096630

申请日：2016-04-12

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C2/10 ,  F04C15/00 ,  F02M59/12 ,  F04C2/08

CPC classification number: F04C2/102 ,  F02M37/045 ,  F04C2/084 ,  F04C2/086 ,  F04C15/0073 ,  F04C2210/1044 ,  F04C2230/92 ,  F04C2240/30 ,  F04C2250/102

Abstract: An inner wall surface of a pump housing has a slide surface, which is opposite from a joint member and along which an inner rotor is slidable. This slide surface includes an external tooth slide surface and a main body slide surface. External teeth of the inner rotor are slidable along the external tooth slide surface, and a main body of the inner rotor is slidable along the main body slide surface. A surface roughness of the main body slide surface is higher than a surface roughness of the external tooth slide surface.

Abstract translation: 泵壳体的内壁面具有与接头构件相对的滑动面，内转子沿着该滑动面滑动。 该滑动表面包括外齿滑动表面和主体滑动表面。 内转子的外齿可以沿着外齿滑动面滑动，内转子的主体沿主体滑动面滑动。 主体滑动面的表面粗糙度高于外齿滑动面的表面粗糙度。

公开(公告)号：US20180372096A1

公开(公告)日：2018-12-27

申请号：US15780059

申请日：2016-12-01

Applicant: DENSO CORPORATION

Inventor： Daiji FURUHASHI ,  Hiromi SAKAI ,  Tetsuo HAYAKAWA

IPC: F04C15/00 ,  F02M37/08 ,  F04C2/10

Abstract: A casing of a housing of a fuel pump has a bearing surface that rotatably supports an inner gear in an axial direction from a motor side while a plain bearing extends through the bearing surface. The plain bearing includes: an inner-peripheral-side step that is stepped by increasing an inner diameter of the plain bearing on a counter-motor side of the inner-peripheral-side step in the axial direction; and an outer-peripheral-side step that is stepped by increasing an outer diameter of the plain bearing on the motor side of the outer-peripheral-side step at a position that is on the motor side of the bearing surface in the axial direction.

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：US20180010606A1

公开(公告)日：2018-01-11

申请号：US15544532

申请日：2016-01-19

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C15/00 ,  F04C2/10 ,  F04C13/00

CPC classification number: F04C15/0061 ,  F04C2/084 ,  F04C2/102 ,  F04C13/001 ,  F04C15/0073 ,  F04C15/008 ,  F04C2210/1044 ,  F04C2230/603 ,  F04C2240/30 ,  F04C2240/40 ,  F04C2240/60

Abstract: An outer gear and an inner gear expand and contract volume of pump chambers formed between both the gears, and rotate to suction fuel into the pump chambers and then discharge fuel from the pump chambers sequentially. The inner gear includes an insertion hole that is depressed along its axial direction. A joint member includes a main body portion that is fitted to a rotary shaft, a foot portion that extends from the main body portion along the axial direction and is inserted in the insertion hole with a clearance therebetween, and a protruding portion that protrudes from the foot portion toward a rotation progress side of the inner gear and has its width in the axial direction further narrowed toward a top portion of the protruding portion.

公开(公告)号：US20160333875A1

公开(公告)日：2016-11-17

申请号：US15153951

申请日：2016-05-13

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C15/00 ,  F04C15/06 ,  F02M59/14 ,  F04C2/10

CPC classification number: F04C15/0042 ,  F01C21/10 ,  F02M59/14 ,  F04C2/102 ,  F04C11/008 ,  F04C15/06 ,  F04C2210/1044

Abstract: A fuel pump includes rotors that rotate, a pump housing that defines a rotor housing chamber that rotatably houses the rotors, and an outer circumferential side housing that includes a cylindrical portion formed in a cylindrical shape that surrounds the pump housing from an outer circumferential side and a narrowing potion having that narrows down with respect to the cylindrical portion. The fuel pump sucks fuel into the rotor housing chamber and then discharges the fuel due to the rotor rotating. A pump cover of the pump housing includes an inlet port that sucks fuel into the rotor housing chamber, and a sliding surface portion on which the rotors slide. An outer circumferential portion of the pump cover includes a joining portion joined to the narrowing portion, and a recessed portion that is recessed adjacent to the joining portion, the recessed portion allowing the outer circumferential portion to elastically deform.

Abstract translation: 燃料泵包括旋转的转子，限定可旋转地容纳转子的转子容纳室的泵壳体，以及外周侧壳体，其包括形成为从外周侧围绕泵壳体的圆筒形状的圆筒部分， 具有相对于圆柱形部分变窄的狭窄部分。 燃料泵将燃料吸入转子容纳室，然后由于转子旋转而将燃料排出。 泵壳的泵盖包括将燃料吸入转子容纳室的入口端口和转子滑动的滑动面部分。 所述泵盖的外周部包括与所述变窄部接合的接合部和与所述接合部相邻地凹陷的凹部，所述凹部使所述外周部弹性变形。

公开(公告)号：US20130162098A1

公开(公告)日：2013-06-27

申请号：US13689994

申请日：2012-11-30

Applicant: DENSO CORPORATION

Inventor： Daiji FURUHASHI ,  Kiyoshi NAGATA ,  Masaya OOTAKE

IPC: H02K3/38

CPC classification number: H02K3/38 ,  H02K3/522 ,  H02K5/12 ,  H02K2203/06

Abstract: A motor part of a fuel pump is a brushless motor having a stator and a rotor. The stator has a core, a coil set and an insulator, which holds the core and the coil set in an insulated manner. The coil set has a plurality of coils wound about a tooth part and a plurality of crossing wires connecting the coils. The insulator is formed by stacking central ring parts of a plurality of stator units in an axial direction. At least one of crossing wire holder parts is formed of a combination of guide projections, which are formed on the different central ring parts. The length of the brushless motor in the axial direction can thus be shortened.

Abstract translation: 燃料泵的电动机部件是具有定子和转子的无刷电动机。 定子具有芯，线圈组和绝缘体，其以绝缘方式保持芯和线圈组。 线圈组具有围绕齿部缠绕的多个线圈和连接线圈的多条交叉线。 绝缘体通过在轴向上堆叠多个定子单元的中心环部而形成。 交叉线保持器部分中的至少一个由形成在不同中心环部分上的引导突起的组合形成。 因此可以缩短无刷电动机在轴向上的长度。