公开(公告)号：US20190234352A1

公开(公告)日：2019-08-01

申请号：US16378407

申请日：2019-04-08

申请人： GE Global Sourcing LLC

发明人： Dipankar Deb ,  Manthram Sivasubramaniam ,  Prashant Srinivasan ,  Sharath Sridhar Aramanekoppa ,  Prem Kumar Patchaikani ,  Sachin Shivajirao Kulkarni ,  Sebastian Walter Freund ,  Jassin Marcel Fritz ,  Georgios Bikas ,  James Henry Yager ,  Shashi Kiran

IPC分类号： F02M26/49 ,  F02M26/43 ,  F02D41/00 ,  F02D41/14 ,  F02D41/22

CPC分类号： F02M26/49 ,  F02D9/04 ,  F02D41/005 ,  F02D41/0065 ,  F02D41/0082 ,  F02D41/1448 ,  F02D41/221 ,  F02D41/40 ,  F02M26/09 ,  F02M26/16 ,  F02M26/43 ,  F02M26/44 ,  F02M26/47 ,  Y02T10/47

摘要： Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.