Patent ID: 8261542
Filing Date: 2012-09-11
Classification: F01N,F02B,F02M

Abstract:
1. A method of heating an engine exhaust gas of an engine, comprising: flowing a first exhaust gas at a first temperature within and along internal flow channels of a catalyst brick; flowing a second exhaust gas at a second, different temperature around an exterior of the catalyst brick via at least a baffle positioned in a housing of an emission control device; and expanding the second exhaust gas through a turbocharger to form the first exhaust gas, where the second exhaust gas is at a higher pressure than the first exhaust gas; wherein the first exhaust gas is maintained separate from the second exhaust gas through an entirety of the housing of the catalyst brick from housing inlet to housing outlet, the housing enclosing the catalyst brick, and wherein the first temperature is higher than the second temperature.