Automatic regeneration control device for particulate filter

An automatic regeneration controller for a particulate filter wherein an oxidation catalyst and the particulate filter are sequentially arranged in an exhaust pipe of an industrial engine for driving a work unit using engine power to conduct various works, fuel being added to an exhaust gas upstream of the oxidation catalyst with a load being forcedly applied to said work unit to intently increase an engine load and increase an exhaust temperature by said increased load, said added fuel undergoing oxidation reaction on the oxidation catalyst and resultant reaction heat burning captured particulates in the particulate filter just behind to thereby conduct regeneration of said particulate filter, comprising

• an engine controller for outputting a fuel injection signal to said industrial engine when an estimated accumulation amount of said particulates is determined to exceed a set value,
• a unit controller for outputting a unit control signal to said hydraulic unit for collaborative control thereof, collaborative control signals being mutually inputted and outputted between said work unit and engine controllers and
• a load application cancellation switch for outputting a cancellation signal to said unit controller depending upon a situation of said work unit to stop the forced load application to said work unit,
• the automatic regeneration controller being configured such that, with the regeneration of the particulate filter being started by determination of captured particulate accumulation, with an idling or light-load operation being conducted, and with load request to said work unit being outputted from said engine controller to said unit controller, when the load application is not possible or the load application cancellation switch is on and, in addition, maintaining of an exhaust temperature with no load application is not possible, then a regeneration stop signal is outputted from said unit controller to said engine controller to conduct a regeneration stop signal reception process in said engine controller to thereby stop, with no forced load application to the work unit, the fuel addition to stop the automatic regeneration control.