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公开(公告)号：EP2915995A4
公开(公告)日：2016-08-10
申请号：EP13850845
申请日：2013-10-09
Applicant: HITACHI AUTOMOTIVE SYSTEMS LTD
Inventor： ARITOMI SHUNSUKE , TOKUO KENICHIROU , USUI SATOSHI , TAMURA SHINGO
CPC classification number: F04B19/22 , F02M59/102 , F02M59/442 , F04B1/0421 , F04B1/0448
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公开(公告)号：EP3088726A4
公开(公告)日：2017-08-30
申请号：EP14874606
申请日：2014-11-17
Applicant: HITACHI AUTOMOTIVE SYSTEMS LTD
Inventor： SASO YUTA , TAMURA SHINGO , AKIYAMA MORITSUGU , SAITO ATSUJI , YAMADA HIROYUKI , HOHKITA ATSUSHI , USUI SATOSHI
CPC classification number: F04B49/22 , F02M59/025 , F02M59/368 , F02M59/44 , F02M59/447 , F02M59/46 , F02M59/462 , F02M59/48 , F02M2200/8061 , F04B19/22 , F04B53/10 , F04B53/14 , F04B53/16
Abstract: A high-pressure fuel supply pump in which a relief valve mechanism is not detached by a force generated by a differential pressure between an inlet side and an output side of a relief valve mechanism is obtained. According to the present invention, in order to obtain the high-pressure fuel supply pump, the relief valve mechanism of the high-pressure fuel supply pump is oriented from a downstream side of a discharge valve to an upstream side of the discharge valve, and the output side of the relief valve mechanism is inserted from the upstream side of the discharge valve into the pump housing, and the relief valve mechanism is fixed with press fitting. Therefore, a force exerted by the differential pressure between the inlet side pressure and the output side pressure of the relief valve mechanism is exerted in a direction in which the relief valve mechanism is inserted, so that the relief valve mechanism can be prevented from being detached.
Abstract translation: 获得一种高压燃料供应泵，其中安全阀机构不会因安全阀机构的入口侧和输出侧之间的压力差而产生的力而分离。 根据本发明，为了获得高压燃料供给泵，高压燃料供给泵的安全阀机构从排出阀的下游侧朝向排出阀的上游侧，并且 安全阀机构的输出侧从排出阀的上游侧插入泵壳体内，并且安全阀机构通过压配合而固定。 因此，由安全阀机构的入口侧压力和输出侧压力之间的压差施加的力沿安全阀机构插入的方向施加，从而可以防止安全阀机构脱离 。
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公开(公告)号：EP2341237A4
公开(公告)日：2017-05-17
申请号：EP09823679
申请日：2009-10-29
Applicant: HITACHI AUTOMOTIVE SYSTEMS LTD
Inventor： USUI SATOSHI , TAMURA SHINGO , MIYAZAKI KATSUMI , YAMADA HIROYUKI
CPC classification number: F02M59/44 , F02M39/02 , F02M59/102 , F02M59/366 , F02M2200/02 , F02M2200/85 , F04B1/0404 , F04B1/0408 , F04B1/0421 , F04B1/0439 , F04B53/168
Abstract: It is an object of the present invention to accurately position a cylinder of a high-pressure fuel pump with respect to an attachment fitting hole provided in an engine block of an internal combustion engine in mounting the pump on the engine block. The high-pressure fuel pump of the invention is provided with a holder including: an outer cylindrical surface portion fitted to a high-pressure fuel pump attachment fitting hole installed on an engine block of the internal combustion engine; and a cylindrical fitting portion fitted to an outer circumference of the cylinder of the pump. The holder is configured such that the outer cylindrical surface portion and the cylindrical fitting portion are formed in a single piece resulting from machining one and the same member. Such a configuration can achieve the above-mentioned object. The central axis of an insertion hole of the piston plunger installed in the cylinder easily provides coaxiality with respect to the central axis of the attachment fitting hole installed in the engine block of the internal combustion engine. Biting and wear between the cylinder and the piston plunger, which are caused by the side force applied to the piston plunger by a drive mechanism, can be reduced.
Abstract translation: 本发明的一个目的是在将泵安装在发动机缸体上时，将高压燃料泵的气缸相对于设置在内燃机的发动机缸体中的附件安装孔准确地定位。 本发明的高压燃料泵设置有支架，该支架包括：外圆柱表面部分，该外圆柱表面部分安装在安装在内燃机的发动机缸体上的高压燃料泵附件安装孔中; 以及装配到泵的气缸的外周的圆柱形装配部分。 保持器被构造成使得外圆柱表面部分和圆柱形配合部分通过机械加工一个和相同构件而形成为单件。 这样的配置可以实现上述目的。 安装在气缸中的活塞柱塞的插入孔的中心轴线容易地相对于安装在内燃机的发动机缸体中的附件安装孔的中心轴线提供同轴度。 可以减小由驱动机构施加到活塞柱塞的侧向力引起的缸体和活塞柱塞之间的咬合和磨损。
