公开(公告)号：US20160319789A1

公开(公告)日：2016-11-03

申请号：US15139542

申请日：2016-04-27

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Michele PETRONE ,  Enrico VEZZANI ,  Massimo MATTIOLI

IPC: F02M59/44 ,  F16K1/32 ,  F02M59/20 ,  F16K31/06 ,  F02M59/02 ,  F02M59/46

CPC classification number: F02M59/442 ,  F02M59/02 ,  F02M59/06 ,  F02M59/102 ,  F02M59/20 ,  F02M59/367 ,  F02M59/462 ,  F02M63/0265 ,  F02M2200/16 ,  F02M2200/26 ,  F02M2200/8053 ,  F02M2200/8061 ,  F02M2200/8076 ,  F16K1/32 ,  F16K31/06

Abstract: A fuel pump for a direct injection system having: a pumping chamber; a piston, which is mounted in a sliding manner on the inside of the pumping chamber; an intake channel, which originates from a wall of the pumping chamber and has a housing portion; an intake valve, which is inserted into the housing portion of the intake channel; and a locking ring nut with an annular shape, which is threaded and is screwed into the housing portion of the intake channel so as to strike against the intake valve; the housing portion has an annular abutment, which reduces the diameter of the housing portion and against which the intake valve strikes; the locking ring nut is screwed into the housing portion with a tightening force that is sufficient to determine a plastic deformation of the annular abutment against the intake valve.

Abstract translation: 一种用于直接喷射系统的燃料泵，具有：泵送室; 活塞，其以滑动方式安装在泵送室的内部; 进气通道，其来自所述泵送室的壁并且具有壳体部分; 进气阀，其插入到进气通道的壳体部分中; 以及具有环形形状的锁定环形螺母，该锁定环螺母被螺纹拧入到进气通道的壳体部分中，以便抵靠进气门; 壳体部分具有环形支座，其减小了壳体部分的直径并且进气阀撞击该直径; 锁定环螺母以足以确定环形支座相对于进气门的塑性变形的紧固力拧入壳体部分中。