公开(公告)号：US20150030466A1

公开(公告)日：2015-01-29

申请号：US14236706

申请日：2012-08-22

Applicant: CUMMINS EMISSION SOLUTIONS, INC.

Inventor： George Muntean ,  Nachiket Pawar ,  Kundana Inala ,  Steve Holl ,  Stephanie Apewokin ,  Cynthia Gosselin ,  Andrew Myer ,  Jim F. Burke ,  John Heichelbech

IPC: F01N3/20 ,  F04B43/02

CPC classification number: F01N3/208 ,  F01N3/2066 ,  F01N2610/00 ,  F01N2610/02 ,  F01N2610/146 ,  F04B43/02 ,  F16K7/12 ,  F16K11/10 ,  Y02T10/24 ,  Y10T137/0391 ,  Y10T137/0396 ,  Y10T137/7836 ,  Y10T137/86815 ,  Y10T137/87676 ,  Y10T137/87684

Abstract: Urea solution pumps having leakage bypass flowpaths and methods of operating the same are disclosed. Certain embodiments are pump apparatuses including an inlet passage in flow communication with a source of urea solution and a pump chamber, an outlet passage in flow communication with the pump chamber and an exhaust after treatment system, a diaphragm facing the pump chamber and coupled with an actuator, a first housing member coupled with a second housing member form a seal around the pumping chamber, a leak collection chamber surrounding the seal, and a return passage in flow communication with the leak collection chamber and the inlet passage. Urea solution that leaks from the pump chamber past the seal is received by the leak collection chamber and flows through the return passage to the pump inlet passage.

Abstract translation: 公开了具有泄漏旁路流路的尿素溶液泵及其操作方法。 某些实施例是泵装置，其包括与尿素溶液源流动连通的入口通道和泵室，与泵室流动连通的出口通道和排气后处理系统，面向泵室的隔膜， 致动器，与第二壳体构件联接的第一壳体构件围绕泵送室形成密封件，围绕密封件的泄漏收集室以及与泄漏收集室和入口通道流体连通的返回通道。 从泵室泄漏通过密封件的尿素溶液被泄漏收集室接收并流过返回通道到泵入口通道。