Patent ID: 9086000
Filing Date: 2015-07-21
Classification: B01D,F01N,F02D,Y02A,Y02T

Abstract:
1. A diesel particulate filter system, comprising: a diesel particulate filter provided in an exhaust pipe of a vehicle engine; a sensor for detecting whether the engine is in an idle state; a sensor for detecting whether the vehicle is moving; an accumulated particulate matter quantity estimation device for estimating an accumulated particulate matter quantity during a detection of the idle state of the engine; and a long low idle forced regeneration unit that, when the estimated accumulated particulate matter quantity exceeds a predetermined quantity, starts long low idle forced regeneration that automatically performs regeneration of the diesel particulate filter, wherein the long low idle forced regeneration unit is configured to, when the vehicle is detected as starting to move during the long low idle forced regeneration, stop the long low idle forced regeneration, and determine whether or not the vehicle is moving at a speed equal to or exceeding a predetermined threshold value for a period of time equal to or exceeding a predetermined period of time, and if so, start automatic regeneration that automatically performs the regeneration while the vehicle is moving, and continue the automatic regeneration, to thereby transition from the long low idle forced regeneration to the automatic regeneration, wherein, the accumulated particulate matter quantity estimation device starts an integration of the accumulated particulate matter quantity after a lapse of a predetermined period of time from the detection of the idle state, estimating the accumulated particulate matter quantity during the idle state of the engine, and wherein the long low idle forced regeneration unit is configured to, when the estimated accumulated particulate matter quantity exceeds a predetermined quantity, reduce the accumulated particulate matter quantity by performing the long low idle forced regeneration and determine whether or not the automatic regeneration can be performed, and if so, then when it is detected that the vehicle is starting to move during the long low idle forced regeneration, stop the long low idle forced regeneration and determine whether or not the vehicle is moving at the speed equal to or exceeding the predetermined threshold value for the period of time equal to or exceeding the predetermined period of time, and if so, start the automatic regeneration, and continue the automatic regeneration, to thereby transition from the long low idle forced regeneration to the automatic regeneration.