SELECTIVE CATALYST REDUCTION HEAT MANAGEMENT METHOD AND SYSTEM

摘要

The heat provided to a vehicle based SCR system may be managed by purposely increasing the load placed on the vehicle's engine such that the engine's exhaust gas temperature remains above a predetermined level. The energy generated by the extra load placed on the engine may be dissipated through an energy absorption device. The need for extra engine load may be anticipated to ensure adequate heat is provided to the SCR throughout various operating conditions.

主权项

1. A method for providing adequate heat to a selective catalyst reduction system located in a vehicle with an engine and a selective catalyst reducer (SCR), the method comprising:
sensing a temperature indicative of the gas temperature at an inlet of the SCR; determining whether the gas temperature at the inlet of the SCR is at a first predetermined minimum temperature; determining the engine load required for current vehicle operation; calculating a first increased engine load required to increase the gas temperature at the inlet of the SCR to at least the first predetermined minimum temperature; calculating a first excess engine load by comparing the engine load required for current vehicle operation to the first increased engine load; adjusting the engine load to the first increased engine load; discarding the first excess engine load through a power absorption device.