公开(公告)号：US20180112659A1

公开(公告)日：2018-04-26

申请号：US15569200

申请日：2016-04-19

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C2/10 ,  F04C15/06 ,  F02M37/10

Abstract: A fuel pump includes: an outer gear having a plurality of inner teeth; an inner gear having a plurality of outer teeth and eccentrically meshing with the outer gear; and a pump housing that defines a cylindrical gear housing chamber housing the outer gear and the inner gear to be rotatable. The outer gear and the inner gear rotate, while expanding and contracting a volume of a plurality of pump chambers formed between the outer gear and the inner gear, to sequentially draw fuel into and discharge from the pump chamber. An inner circumference part of the pump housing has a radially-inside corner part opposing a radially-outside corner part of an outer circumference part of the outer gear, and the pump housing has an annular groove formed in an annular shape all around the radially-inside corner part.

公开(公告)号：US20180087504A1

公开(公告)日：2018-03-29

申请号：US15564860

申请日：2016-08-08

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C2/08 ,  F04C15/06 ,  F02M37/08 ,  F04C2/10

CPC classification number: F04C2/084 ,  F02M37/08 ,  F04C2/102 ,  F04C11/008 ,  F04C13/005 ,  F04C15/06 ,  F04C2210/1044 ,  F04C2230/602 ,  F04C2240/40 ,  F05C2253/20

Abstract: A pump housing includes: a slide surface, along which inner and outer gears are slid; a suction guide passage, which is recessed from the slide surface and guides the fuel at a suction side; a discharge passage, which is recessed from the slide surface-and guides the fuel at a discharge side; and a communication groove, which is recessed from the slide surface and is shaped into an arcuate form that extends along a circumcircle of the inner gear. The communication groove is communicated with the suction groove and the discharge passage through two opposite groove end parts, respectively, of the communication groove.

公开(公告)号：US20170370338A1

公开(公告)日：2017-12-28

申请号：US15542758

申请日：2015-12-21

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F02M59/12 ,  F04C2/08 ,  F04C15/00 ,  F04C15/06

CPC classification number: F02M59/12 ,  F02M37/10 ,  F04C2/084 ,  F04C2/086 ,  F04C2/102 ,  F04C11/008 ,  F04C15/0065 ,  F04C15/008 ,  F04C15/0088 ,  F04C15/06 ,  F04C2210/203 ,  F04C2240/30 ,  F04C2240/40 ,  F04C2240/60

Abstract: An inner gear includes: sliding surface parts that are provided annularly at an outer peripheral part including a plurality of outer teeth on both sides of the inner gear in its axial direction and that slide on a pump housing; recessed parts that are respectively provided radially inward of the sliding surface parts to respectively form fuel chambers, into which fuel flows, between the recessed parts and the pump housing; and a communication hole that communicates between the recessed parts. The inner gear further includes an inclined surface part that is provided at an edge portion of a communicating edge portion on a rotation advance side of the inner gear, to avoid an adjacent part adjacent to an inner peripheral edge portion of each of the sliding surface parts and that is inclined further toward a rear side in a direction to a central part of the communication hole.

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：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：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.

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

IPC: F04D29/66 ,  F04D29/02 ,  F04D29/40 ,  F04D29/24 ,  F02M37/08 ,  F04D13/06

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。

公开(公告)号：US20160298625A1

公开(公告)日：2016-10-13

申请号：US15096657

申请日：2016-04-12

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C2/10 ,  F04C15/00 ,  F04C15/06 ,  F04C2/08

CPC classification number: F04C2/102 ,  F04C15/0092 ,  F04C15/06 ,  F04C2210/1044 ,  F04C2240/50 ,  F04C2240/56 ,  F05C2253/20

Abstract: A pump housing receives an outer rotor and an inner rotor. A joint member couples between a rotatable shaft and the inner rotor to transmit a rotational torque from the rotatable shaft to the inner rotor. A radial bearing is shaped into a cylindrical tubular form. A cylindrical inner peripheral surface of the radial bearing rotatably and slidably supports the rotatable shaft. A cylindrical outer peripheral surface of the radial bearing rotatably and slidably supports an inner peripheral surface of the inner rotor. A lubrication groove is formed in the cylindrical outer peripheral surface of the radial bearing and accumulates fluid, which is present in an inside of the pump housing.

Abstract translation: 泵壳体容纳外转子和内转子。 联接构件联接在可旋转轴和内转子之间，以将旋转扭矩从可旋转轴传递到内转子。 径向轴承成形为圆柱形管状。 径向轴承的圆柱形内周面可旋转并可滑动地支撑旋转轴。 径向轴承的圆柱形外周表面可旋转并可滑动地支撑内转子的内周表面。 在径向轴承的圆筒形外周面上形成润滑槽，并且积聚存在于泵壳体内部的流体。

公开(公告)号：US20160298624A1

公开(公告)日：2016-10-13

申请号：US15096625

申请日：2016-04-12

Applicant: DENSO CORPORATION

Inventor： Hiromi SAKAI ,  Daiji FURUHASHI

IPC: F04C2/10 ,  F04C15/06 ,  F02M59/12 ,  F04C2/08

CPC classification number: F04C2/102 ,  F02M37/10 ,  F04C2/084 ,  F04C2/086 ,  F04C15/06 ,  F04C2210/1044 ,  F04C2250/101

Abstract: A suction groove is formed in an inside wall surface of a pump cover and is communicated with a suction passage of the pump cover. The suction groove extends along a rotational path of external teeth of an inner rotor and a rotational path of internal teeth of an outer rotor. An edge of a portion of the pump cover, which forms the suction groove, includes chamfered edge parts, which are chamfered, and unchamfered edge parts, which are not chamfered and are not rounded. Each of the unchamfered edge parts is located in a direct-inflow region of the suction groove, which overlaps with the suction passage in a view taken in a direction of a rotational axis, and each of the chamfered edge parts is located in a corresponding one of peripheral regions, which are other than the direct-inflow region.

Abstract translation: 在泵盖的内壁面形成有吸入槽，与泵盖的吸入通路连通。 吸入槽沿内转子的外齿的旋转路径和外转子的内齿的旋转路径延伸。 形成抽吸槽的泵盖的一部分的边缘包括倒角的倒角边缘部分和未被倒角且未被倒圆的未受弯边缘部分。 每个未被引导的边缘部分位于吸入槽的直接流入区域中，其沿着沿着旋转轴线的方向的视图与吸入通道重叠，并且每个倒角边缘部分位于相应的一个 的外围区域，其不同于直接流入区域。