System and method for determining available engine torque based on cold light off catalyst

A control system for an engine comprising a turbocharger, the system comprising:

• a cold light off catalyst (CLOC) positioned in a bypass passage around a turbine of the turbocharger;
• a CLOC valve that selectively routes exhaust flow from the engine between the turbine and the CLOC;
• and
• a controller configured to:
• command the CLOC valve to operate in a CLOC mode whereby exhaust flow is routed, at least partially, to the CLOC;
• determine a position of the CLOC valve;
• determine, based on the position of the CLOC valve, an available torque of the engine including (i) determining a first known engine torque available for a plurality engine speeds when the CLOC valve is fully open, wherein fully open corresponds to all exhaust flow directed into the turbine;
• and (ii) determining a second known engine torque available for the plurality of engine speeds when the CLOC valve is fully closed in the CLOC mode, wherein fully closed corresponds to all exhaust flow diverted from the turbine and directed instead into the CLOC;
• compare each of the first known engine torque when the CLOC valve is fully open and the second known engine torque when the CLOC valve is fully closed with the determined position of the CLOC valve;
• and
• set a maximum available engine torque based on the determined available torque of the engine.