Invention Grant
- Patent Title: Method and apparatus for operating an internal combustion engine employing first and second EGR flowpaths
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Application No.: US15378151Application Date: 2016-12-14
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Publication No.: US10208716B2Publication Date: 2019-02-19
- Inventor: Armando Mogavero , Antonio Rodio
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F02M26/42 ; F02M26/38 ; F02M26/47 ; F02M26/52 ; F02D41/00 ; F02D41/14 ; F02M26/05 ; F02M26/06

Abstract:
An internal combustion engine system includes a first EGR valve to control flow in a first flow path, and a second EGR valve to control flow in a second flow path. A temperature sensor is disposed in the exhaust gas feedstream upstream of the exhaust purifying device, and a controller is in communication with the internal combustion engine and the temperature sensor and is operatively connected to the first and second EGR valves. The controller executes a routine to monitor the temperature of the exhaust gas feedstream upstream of the exhaust purifying device and control the first valve to control flow of exhaust gas to the air intake system via the first flow path and control the second valve to control flow of exhaust gas to the air intake system via the second flow path based upon the temperature of the exhaust gas feedstream upstream of the exhaust purifying device.
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