Approach for Identifying and Responding to an Unresponsive Wastegate in a Twin Turbocharged Engine

An engine operating method for an engine including two cylinder banks and first and second turbochargers, comprising:

• adjusting an operating parameter of at least one of the first and second turbochargers in response to a difference between a first temperature of exhaust gases at a location in an exhaust system downstream of the first turbocharger and a second temperature of exhaust gases at a location in the exhaust system downstream of the second turbocharger.

An engine operating method for an engine including two cylinder banks and first and second turbochargers, comprising:

• supplying a first command to a first wastegate of the first turbocharger and supplying a second command a second wastegate of the second turbocharger, the first and second commands supplied to open or closed the first and second wastegates;
• and
• adjusting a position of the first wastegate to the same position of the second wategate or adjusting a position of the second wastegate to a same position of the first wastegate in response to a difference between a first temperature of exhaust gases at a location in an exhaust system downstream of the first turbocharger and a second temperature of exhaust gases at a location in the exhaust system downstream of the second turbocharger.

An engine operating method for an engine including two cylinder banks and first and second turbochargers, comprising:

• identifying a difference between a first temperature of exhaust gases at a location in an exhaust system downstream of the first turbocharger and a second temperature of exhaust gases at a location in the exhaust system downstream of the second turbocharger;
• and
• reducing an amount of boost provided via the first and second turbochargers in response to the difference between the first temperature of exhaust gases and the second temperature of exhaust gases.