Patent ID: 7086220
Filing Date: 2006-08-08
Classification: F01N,F02D,Y02T

Abstract:
1. A regeneration control method for regenerating a filter in a continuously regenerating-type diesel particulate filter device, for capturing particulate matters in exhaust gas from an engine and oxidizing and removing the captured particulate matters, comprising: determining a state of clogging of the filter at four classified states of clogging of the filter; performing no regeneration-mode operation when the state of clogging of the filter is at a first state of clogging; when the state of clogging of the filter is at a second state of clogging, performing a regeneration control comprising a post-injection alone when a catalyst temperature exceeds a catalyst activated temperature; when the state of clogging of the filter is at a third state of clogging, performing no preliminary heating operation when the exhaust-gas temperature is in a first temperature region in which torque is middle to high and the exhaust-gas temperature is relatively high, while performing an exhaust-temperature heating-up operation through an intake-throttling when the exhaust-gas temperature is in a second temperature region in which the torque is low and the exhaust-gas temperature is relatively low; and when the state of clogging of the filter is at a fourth state of clogging, performing no preliminary heating operation when the exhaust-gas temperature is in a first temperature region in which the torque is high and the exhaust-gas temperature is relatively high; performing an exhaust-temperature heating-up operation accompanying an intake throttling when the exhaust-gas temperature is in a second temperature region in which the torque is medium and in which the exhaust gas temperature is relatively low; and performing an exhaust-temperature heating-up control accompanying an intake-throttling and an injection retarding when the exhaust-gas temperature is in a third temperature region in which the torque is low and the exhaust-gas temperature is low.