Patent ID: 9540983
Date: 2017-01-10
CPC Classifications: F01N,F02D,Y02T

Claim:
1. A construction machine comprising: a vehicle body; an engine that is mounted on said vehicle body and is driven by injection of fuel; an exhaust gas purifying device that is provided in an exhaust side of said engine and includes a filter for trapping particulate matter in an exhaust gas discharged from said engine; and a regeneration device that burns the particulate matter trapped in said filter in said exhaust gas purifying device to execute regeneration treatment of said filter, wherein: said regeneration device includes: said controller of said regeneration device estimates a trapping amount of the particulate matter trapped in said filter based upon a signal that includes either of a rotational number signal of the engine detected by said rotational sensor or a pressure signal of said filter detected by said pressure sensors, said controller of said regeneration device starts the regeneration treatment of said filter by starting the fuel injection for the regeneration treatment from said fuel injection device when the estimated trapping amount (H) is equal to or more than a preset regeneration start value (Ht), said controller of said regeneration device interrupts the regeneration treatment of said filter by interrupting the fuel injection for the regeneration treatment from said fuel injection device when the exhaust gas temperature (T) detected by said exhaust gas temperature sensor becomes less than a preset given temperature (Tt) in the middle of executing the regeneration treatment of said filter, said controller of said regeneration device restarts the regeneration treatment of said filter by restarting the fuel injection for the regeneration treatment from said fuel injection device when the exhaust gas temperature (T) becomes equal to or more than the preset given temperature (Tt) in a case where the regeneration treatment of said filter is interrupted, said controller of said regeneration device terminates the regeneration treatment of said filter by terminating the fuel injection for the regeneration treatment from said fuel injection device when the estimated trapping amount (H) is equal to or less than a normal terminated value (He on the other hand, said controller of said regeneration device terminates the regeneration treatment of said filter by terminating the fuel injection for the regeneration treatment from said fuel injection device when the estimated trapping amount (H) is equal to or less than a restart terminated value (He the restart terminated value (He