Method and systems for exhaust gas control

US10253731B2 · kind B2 · utility

Assignee

• GE Global Sourcing LLC · US

Inventors

• Dipankar Deb · Ahmedabad, IN
• Manthram Sivasubramaniam · Bengaluru, IN
• Prashant Srinivasan · Savanuru, IN
• Sharath Sridhar Aramanekoppa · Bengaluru, IN
• Prem Kumar Patchaikani · Bengaluru, IN
• Sachin Shivajirao Kulkarni · Bengaluru, IN
• Sebastian Walter Freund · Seßlach, DE
• Jassin Marcel Fritz · Munich, DE
• Georgios Bikas · Freising, DE
• James Henry Yager · Northville, US
• Shashi Kiran · Erie, US

Key dates

• Filing date: Feb 17, 2016
• Grant date: Apr 9, 2019
• Expiry date: Nov 1, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

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.