Patent ID: 6978604

Claim:
A diesel engine comprising: an exhaust system comprising a DPF that treats exhaust gas resulting from combustion of fuel in the engine; and a control system for controlling regeneration of the DPF comprising a processor a) for repeatedly processing a first data value correlated with actual soot loading of the DPF and a second data value representing soot loading sufficient to mandate initiation of regeneration, b) for initiating regeneration when the processing of a) discloses that the actual soot loading is at least equal to the soot loading sufficient to mandate initiation of regeneration, c) for repeatedly processing the first data value and a third data value representing soot loading less than that represented by the second data value, d) for repeatedly processing a result of the processing of c) and other data values indicative of selected engine operating conditions, e) for initiating regeneration when a result of the processing of d) discloses both that the actual soot loading is at least equal to the soot loading represented by the third data value and that the selected engine operating conditions disclose conditions suitable for regeneration, f) for repeatedly processing data values for determining termination of regeneration, and g) for terminating regeneration when the processing of f) discloses that regeneration should be terminated.