公开(公告)号：US08109739B2

公开(公告)日：2012-02-07

申请号：US10570590

申请日：2004-09-03

申请人： Nathan Wrench ,  Helen Victoria Lewis ,  Simon James Naylor ,  Charles Douglas Johnstone ,  James Beeching Neave

发明人： Nathan Wrench ,  Helen Victoria Lewis ,  Simon James Naylor ,  Charles Douglas Johnstone ,  James Beeching Neave

IPC分类号： F04B17/00

CPC分类号： F02M25/00 ,  F04B13/00 ,  F04B17/03

摘要： A dosing pump for a liquid additive in fuel of a heavy fuel engine includes a piston, a cylinder, and a high resolution linear actuator, including a motor driven by a controller, for moving the piston axially in the cylinder. The pump includes a manifold, and a low friction dish-shaped seal having a peripheral portion forming a seal between the cylinder and the manifold in a fully extended position of the piston. The dish-shaped seal includes a top portion attached to the piston that moves with the piston such that the top portion of the seal is compressed against the manifold in the fully extended position. The shape of the seal minimizes non-linearity of the volume dosed as a function of movement of the piston, and the controller drives the motor so as to remove a remaining non-linearity of the volume dosed as a function of movement of the piston.

摘要翻译： 用于重型燃料发动机的燃料中的液体添加剂的计量泵包括活塞，气缸和高分辨率线性致动器，其包括由控制器驱动的电动机，用于使活塞在气缸中轴向移动。 泵包括歧管和低摩擦盘形密封件，其具有在活塞的完全伸出位置处在气缸和歧管之间形成密封的周边部分。 碟形密封件包括附接到活塞的顶部部分，该顶部部分与活塞一起移动，使得密封件的顶部在完全伸出的位置被压靠在歧管上。 密封件的形状使作为活塞运动的函数的剂量的非线性最小化，并且控制器驱动电动机，以便除去作为活塞运动的函数的剂量的剩余非线性。