公开(公告)号：US20160265495A1

公开(公告)日：2016-09-15

申请号：US15033334

申请日：2014-10-16

Applicant: DENSO CORPORATION

Inventor： Kiyoshi NAGATA ,  Yuuichirou OOTA ,  Hiromi SAKAI

IPC: F02M37/20 ,  F04D13/06 ,  F04D29/043 ,  F02M37/22 ,  F04D29/18 ,  F04D29/70 ,  F02M37/08 ,  F04D3/00 ,  F04D29/041

CPC classification number: F02M37/20 ,  F02M37/048 ,  F02M37/08 ,  F02M37/22 ,  F04D3/005 ,  F04D5/002 ,  F04D13/06 ,  F04D29/0413 ,  F04D29/043 ,  F04D29/18 ,  F04D29/708

Abstract: A projection of a suction end cover has an outer circumferential surface serving as a sealing surface to be connected with a suction filter. A suction flow path is configured by an introduction hole in a bottomed cylindrical shape, and a connection hole. The introduction hole extends from the distal end of the projection of the suction end cover toward a pump chamber. The connection hole connects the introduction hole and the pump chamber. The introduction hole has a bottom surface that is located axially between a slide inner surface of the suction end cover and a bottom surface of a recess. The suction flow path can be increased in sectional area enough to reach a position in immediate front of the pump chamber with no change in outer diameter of a housing. By reducing fuel flow speed in the suction flow path and suppressing negative pressure in the suction flow path, generation of fuel vapor in the suction flow path can be inhibited even in a large flow rate area.

Abstract translation: 抽吸端盖的突出部具有作为与抽吸过滤器连接的密封面的外周面。 抽吸流路由有底圆筒状的导入孔和连接孔构成。 引入孔从吸入端盖的突起的远端朝向泵室延伸。 连接孔连接导入孔和泵室。 引入孔具有轴向位于吸入端盖的滑动内表面和凹部的底表面之间的底表面。 吸入流动路径可以增加到足以达到泵室的紧前面的位置的截面面积，而壳体的外径没有变化。 通过减少吸入流路中的燃料流速并且抑制吸入流路中的负压，即使在大流量区域中也可以抑制吸入流路中的燃料蒸气的产生。

公开(公告)号：US20130323024A1

公开(公告)日：2013-12-05

申请号：US13905680

申请日：2013-05-30

Applicant: DENSO CORPORATION

Inventor： Yuuichirou OOTA ,  Hiromi SAKAI

IPC: F04D1/00

CPC classification number: F04D1/00 ,  F04D5/002 ,  F04D13/0653 ,  F04D13/0693 ,  F04D15/0005

Abstract: A fuel pump includes a pump cover on one side of a housing, a cover end portion on the other side of the housing, a stator inside the housing, a rotor inside the stator, a shaft rotatable with the rotor, an impeller rotatable with the shaft to pressurize fuel inside the housing, a bearing portion provided in the cover end portion on its center axis to slidably support an end part of the shaft, and a relief valve capable of reducing a fuel pressure inside the housing. The cover end portion has an end surface located on its side opposite from the pump cover, and the relief valve includes a valve seat located on an opposite side of the end surface of the cover end portion from the pump cover.

Abstract translation: 燃料泵包括在壳体的一侧上的泵盖，壳体另一侧上的盖端部，壳体内的定子，定子内部的转子，可与转子一起旋转的轴，可转动的叶轮， 轴对所述壳体内的燃料加压，设置在所述盖端部的中心轴线上的轴承部，以可滑动地支撑所述轴的端部，以及能够减小所述壳体内的燃料压力的安全阀。 盖端部具有位于其与泵盖相对的一侧的端面，并且安全阀包括位于盖端部与泵盖的端面相反侧的阀座。