Patent ID: 7614215
Filing Date: 2009-11-10
Classification: F01N,Y02T

Abstract:
1. An exhaust treatment packaging apparatus, the apparatus comprising: a housing having an exhaust inlet and exhaust outlet; a first passage configured to house exhaust gases flowing in a first direction, the first passage being disposed within the housing; a first additive doser coupled to the housing between the exhaust inlet and first passage, the first additive doser being configured to dose a first additive into the exhaust prior to being housed in the first passage; a second additive doser coupled to the housing between the exhaust inlet and first passage, the second additive doser being configured to dose a second additive into the exhaust prior to being housed in the first passage, the first additive being different than the second additive; a reverse-flow mechanism configured to receive the exhaust gases from the first passage and cause the exhaust gases to flow in a second direction substantially opposite the first direction, the reverse-flow mechanism being disposed within the housing; a second passage disposed adjacent the first passage, the second passage configured to receive the exhaust gases from the reverse-flow mechanism and house the exhaust gases flowing in the second direction, the second passage being disposed within the housing; a first exhaust treatment device disposed within the second passage, the first exhaust treatment device configured to utilize the first additive to treat the exhaust gases, wherein the first exhaust treatment device comprises an inlet in exhaust gas receiving communication with exhaust gases flowing in the second direction and an outlet in exhaust gas providing communication with the second passage to provide exhaust gases flowing in the second direction; a second exhaust treatment device disposed within the housing, the second exhaust treatment device configured to utilize the second additive to treat the exhaust gases; and an inlet module disposed within the housing and positioned between the exhaust inlet and the first passage, the inlet module being configured to receive exhaust from the exhaust inlet and provide exhaust to the first passage, wherein the first additive doser is configured to dose the first additive into the inlet module and the second additive doser is configured to dose the second additive into the inlet module, and wherein the inlet module comprises a cross-sectional area equal to or greater than a combined cross-sectional area of the first and second passages.