Patent ID: 8307630
Filing Date: 2012-11-13
Classification: F01N,F02B,Y02T

Abstract:
1. An exhaust system for an internal combustion engine comprising: an exhaust manifold; a turbocharger; an exhaust pipe disposed in fluid communication with the turbocharger, the exhaust pipe having a first portion, a second portion, and a third portion, at least the second portion of the exhaust pipe comprising a plurality of fluid paths; a first diesel particulate filter coupled to a first of the plurality of fluid paths; a second diesel particulate filter coupled to a second of the plurality of fluid paths; a flow control valve disposed within the second portion of the exhaust pipe, the flow control valve being responsive to an input signal indicative of at least one operating condition and being configurable to direct exhaust flow to the first diesel particulate filter, the second diesel particulate filter, or both the first and second diesel particulate filters in response to the input signal; and a Y-shaped turbocharger bypass disposed between the exhaust manifold, the first of the plurality of fluid paths of the second portion of the exhaust pipe, and the second of the plurality of fluid paths of the second portion of the exhaust pipe, the Y-shaped turbocharger bypass having a bypass valve positionable to allow exhaust gas from the exhaust manifold to enter the first of the plurality of fluid paths of the second portion of the exhaust pipe or the second of the plurality of fluid paths of the second portion of the exhaust pipe, or neither the first of the plurality of fluid paths of the second portion of the exhaust pipe nor the second of the plurality of fluid paths of the second portion of the exhaust pipe, without passing through the turbocharger.