Patent ID: 11885253
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 10:
11. A motor vehicle comprising:
an internal combustion engine (ICE);
an exhaust system fluidly connected to the ICE and having a catalytic converter configured to treat exhaust gas from the ICE;
an exhaust-flow control valve arranged in the exhaust system; and
an electronic controller in operative communication with the ICE and the exhaust-flow control valve, programmed with an algorithm, and configured to execute the algorithm to:
identify a start of the ICE requiring a light-off of the catalytic converter;
regulate an exhaust-flow control valve to increase exhaust gas backpressure in the exhaust system in response to the identified start of the ICE;
regulate combustion inside the ICE to increase enthalpy of the ICE;
detect the light-off of the catalytic converter;
regulate the exhaust-flow control valve to decrease the exhaust gas backpressure in the exhaust system in response to the detected light-off of the catalytic converter; and
regulate combustion inside the ICE to decrease enthalpy of the ICE in response to the detected light-off of the catalytic converter.