Patent ID: 9458782
Filing Date: 2016-10-04
CPC Classification: F01N,F02D,Y02A,Y02T

Claim Text:
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; determining a haul cycle of the vehicle, wherein the haul cycle includes a plurality of segments; anticipating a future need for a raised engine load based on the upcoming segments in the haul cycle, wherein at least one segment of the haul cycle calls for the raised engine load, wherein the raised engine load occurs above a second predetermined temperature of the gas at the inlet of the SCR; calculating a second increased engine load required to increase the gas temperature at the inlet of the SCR to at least the second predetermined temperature; calculating a second excess engine load by comparing the first increased engine load to the second increased engine load; adjusting the engine load to the second increased engine load before the vehicle reaches the haul cycle segment that calls for the raised engine load; discarding the second excess engine load through the power absorption device.