Patent ID: 9086004
Filing Date: 2015-07-21
Classification: B60W,B60Y,E02F,F01N,F02D,Y02T

Abstract:
1. A system for active regeneration of a DPF of a construction machine having an electro-hydraulic pump, the system comprising: a diesel engine; electro-hydraulic pumps driven by the diesel engine and of which a discharge flow rate is adjusted by a current control of a controller; a plurality of working machines driven by working fluid discharged from the electro-hydraulic pumps; a center bypass line having one end connected to the electro-hydraulic pumps, and the other end connected to a tank, so that the working fluid discharged from the electro-hydraulic pumps returns back to the tank when the plurality of working machine is not driven; center bypass cut valves which selectively block connection between the center bypass line and the tank; a diesel particulate filter (DPF) which filters contaminants from exhaust gas discharged from the diesel engine; and a DPF regeneration means including a diesel oxidation catalyst (DOC) which causes an exothermic reaction with fuel at a predetermined temperature, wherein the controller produces a non-work load by increasing a discharge flow rate of the electro-hydraulic pumps without driving the working machines in a state in which the center bypass line is connected to the tank by driving the center bypass cut valves when performing active regeneration of the DPF, and allows a temperature of the exhaust gas to be raised up to the predetermined temperature by increasing a heating value of the diesel engine by the non-work load.