Patent ID: 7752839
Filing Date: 2010-07-13
Classification: B01D,F01N,Y02T

Abstract:
1. An exhaust emission purifying apparatus, comprising: a box-shaped casing comprising a compartment wall arranged to partition an inside of the box-shaped casing into a plurality of chambers to form an exhaust passage from an exhaust emission inlet in a first chamber of the plurality of chambers to an exhaust emission outlet in a second chamber of the plurality of chambers, wherein the exhaust passage is folded in direction at least once; a reduction catalyst arranged in the exhaust passage of the box-shaped casing to reductively purify nitrogen oxide in an exhaust emission using a reducing agent; a nozzle arranged in the box-shaped casing to inject the reducing agent or a precursor thereof into the exhaust passage upstream from the reduction catalyst; and a filter arranged in the exhaust passage of the box-shaped casing to collect particulate matter suspended in the exhaust emission, wherein: