Patent ID: 8511069

Claim:
A control system for an engine comprising: a first electronic circuit configured to generate a request to regenerate a particulate matter (PM) filter that filters PM from exhaust of said engine based on one or more operating parameter; and a second electronic circuit configured to response to said request, regulates operation of said engine and an electric heater maintains said inlet surface of said PM filter such that: for a first heating period, said electric heater maintains said inlet surface within a first inlet temperature range above a regeneration temperature of said PM filter and combustion of a first mass of accumulated PM within said PM filter is initiated, for a cooling period following said first heating period, said exhaust cools said inlet surface to within a second inlet temperature range below said regeneration temperature and combustion of said first mass is inhibited, and for a second heating period following said cooling period, said inlet surface is maintained within a third inlet temperature range above said regeneration temperature and a second mass of said accumulated PM is combusted, wherein said cooling period is less than said first heating period and said second heating period, wherein said first heating period is less than said second heating period, and wherein said second heating period immediately follows said cooling period.