公开(公告)号：US20160069313A1

公开(公告)日：2016-03-10

申请号：US14847286

申请日：2015-09-08

Applicant: MAGNETI MARELLI S.p.A.

Inventor： Enrico VEZZANI ,  Michele PETRONE ,  Luca MANCINI

IPC: F02M63/02

CPC classification number: F02M63/0265 ,  F02M59/06 ,  F02M59/102 ,  F02M2200/02 ,  F04B1/0426 ,  F04B1/0452 ,  F04B53/1002 ,  F16F1/047

Abstract: Fuel pump for a direct injection system provided with a common rail; the fuel pump has: a pumping chamber defined in a main body; a piston which is mounted in a sliding manner inside the pumping chamber to cyclically vary the volume of the pumping chamber; an intake channel which originates from a wall of the pumping chamber; an intake valve which is coupled to the intake channel; a delivery channel which originates from a wall of the pumping chamber; a delivery valve which is coupled to the delivery channel; and an actuating spring which has a plurality of turns having a pitch between the turns being variable and coupled to the piston so as to push the piston towards a maximum volume or minimum volume position of the pumping chamber.

Abstract translation: 用于具有共轨的直喷系统的燃油泵; 所述燃料泵具有：限定在主体中的泵送室; 活塞，其以滑动方式安装在泵送室内以循环地改变泵送室的体积; 来自泵送室的壁的进气通道; 进气阀，其连接到所述进气通道; 来自泵送室的壁的输送通道; 输送阀，其连接到输送通道; 以及致动弹簧，其具有多个匝，所述匝在所述匝之间具有可变的变化并且联接到所述活塞上，以将所述活塞推向所述泵送室的最大容积或最小容积位置。