公开(公告)号：US20170184096A1

公开(公告)日：2017-06-29

申请号：US15301899

申请日：2015-04-13

申请人： MAGNA POWERTRAIN INC.

发明人： Cezar TANASUCA ,  David R. SHULVER ,  Hans Jürgen LAUTH

IPC分类号： F04C14/22 ,  F01M1/16 ,  F04C14/24 ,  F01M1/02 ,  F04C2/336 ,  F04C2/344

CPC分类号： F04C14/226 ,  F01M1/02 ,  F01M1/16 ,  F01M2001/0238 ,  F01M2001/0246 ,  F04C2/336 ,  F04C2/344 ,  F04C14/24 ,  F04C2240/30

摘要： A variable capacity pump includes a control ring moveable within a pump chamber to alter the volumetric capacity of the pump. First and second control chambers individually receive pressurized fluid to create forces to bias the control ring in a predetermined direction. A return spring urges the control ring toward a maximum volumetric capacity pump position. The control ring connects and disconnects the second control chamber from a source of pressurized fluid based on a position of the control ring. Forces from the control chambers and the spring act in combination with one another or against one another and against the spring force to establish first and second equilibrium pressures based on a pressurized or vented condition of the second control chamber.