Patent ID: 8573646
Filing Date: 2013-11-05
Classification: B01D,B60K,E02F,F01N,Y02A,Y02T

Abstract:
1. A mounting structure for an NOx reduction system for a construction machine having an engine compartment, a counterweight arranged adjacent the engine compartment at a rear position of a body to maintain stability of the body, an engine and a hydraulic pump drivable by the engine, said engine and hydraulic pump being arranged in the engine compartment, said NOx reduction system including a PM collection filter to be arranged in an exhaust passage of the engine to collect suspended particulate matter contained in exhaust gas from the engine, a reduction catalyst for reducing and purifying nitrogen oxides contained in the exhaust gas from the engine, a reducing agent spray device for spraying a reducing agent into the exhaust passage of the engine, a reducing agent feeder for feeding the reducing agent to the reducing agent spray device, and a reducing agent storage tank for storing therein the reducing agent to be guided to the reducing agent feeder, wherein: a recessed section, of which a top side opens toward a top of the counterweight, is formed at a side of the engine compartment in an upper portion of the counterweight, the reduction catalyst is arranged in the recessed section, and the PM collection filter is arranged in the engine compartment so that the PM collection filter is communicated with the reduction catalyst via a piping.