Regeneration control device for exhaust gas treatment device
First Claim
1. A regeneration control device for an exhaust gas treatment device, which performs recovery of a DOC disposed in an exhaust passage of a diesel engine and forced regeneration of a DPF disposed in the exhaust passage downstream of the DOC, the regeneration control device comprising:
- a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine;
a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for the DPF is satisfied;
a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature regardless of whether the forced regeneration execution condition of the DPF is satisfied or not, if it is determined that the DOC is in the blockage risk state;
a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is satisfied; and
a counter reset process part configured to reset the counter value after completion of the forced regeneration process by the DPF forced regeneration execution part.
1 Assignment
0 Petitions
Accused Products
Abstract
A regeneration control device for an exhaust gas treatment device includes: a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine; a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature, if it is determined that the DOC is in the blockage risk state; a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for the DPF is satisfied; a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is satisfied; and a counter reset process part configured to reset the counter value after completion of the forced regeneration process by the DPF forced regeneration execution part.
2 Citations
19 Claims
-
1. A regeneration control device for an exhaust gas treatment device, which performs recovery of a DOC disposed in an exhaust passage of a diesel engine and forced regeneration of a DPF disposed in the exhaust passage downstream of the DOC, the regeneration control device comprising:
-
a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine; a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for the DPF is satisfied; a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature regardless of whether the forced regeneration execution condition of the DPF is satisfied or not, if it is determined that the DOC is in the blockage risk state; a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is satisfied; and a counter reset process part configured to reset the counter value after completion of the forced regeneration process by the DPF forced regeneration execution part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification