Patent ID: 9523974
Filing Date: 2016-12-20
CPC Classification: B01D,F01N,F02D,G05B,Y02T

Claim Text:
1. A method of controlling operation of an exhaust fluid treatment apparatus, the apparatus comprising a diesel oxidation catalyst comprising an inlet and an outlet, the method comprising: receiving an input temperature data value being indicative of a temperature at the inlet; receiving a flow rate data value being indicative of a rate of flow of fluid in the diesel oxidation catalyst; receiving a threshold temperature data value indicative of a predicted temperature required for fuel in the diesel oxidation catalyst to oxidize; receiving mode data indicative of whether the diesel oxidation catalyst is operating in a first mode or a second mode, the first mode being a warm-up mode and the second mode being a running mode of the diesel oxidation catalyst; and sending, when the input temperature data value is greater than the threshold temperature data value, a fuel data value indicative of a quantity of fuel to be injected into the exhaust fluid upstream of the inlet for combustion in the diesel oxidation catalyst, wherein the fuel data value is obtained from a data library which comprises a first set of fuel data values relating to the first mode and a second set of fuel data values relating to the second mode, each fuel data value of the first and second sets of fuel data values being associated with a particular combination of input temperature data value and flow rate data value, and for each particular combination of input temperature data value and flow rate data value, a data value of the first set of data values is indicative of a smaller quantity of fuel or a slower rate of flow of fuel than a data value of the second set of data values.