Patent ID: 8341949

Claim:
An after-treatment module, comprising: a housing having an exhaust inlet and an exhaust outlet configured to be installed as part of an exhaust system of an exhaust producing engine such that at least a portion of the exhaust from the engine enters the housing through the exhaust inlet, flows through the housing, and exits the housing through the exhaust outlet; at least one selective catalytic reduction (SCR) catalyst disposed within the housing and configured to facilitate a reduction reaction with NO x in the exhaust; at least one NO x sensor disposed within the housing and configured to take measurements of an amount of NO x in the exhaust; a thermal isolating structure connected directly to the housing, the thermal isolating structure including a mounting plate disposed at a distance from the housing such that an air gap is formed between the mounting plate and the housing; and a controller connected to the mounting plate and configured to receive the NO x measurements from the NO x sensor.