Bypass mechanism for an exhaust system

A bypass mechanism for use with a turbocharger, comprising:

• an exhaust passage formed by at least a first wall;
• a bypass manifold formed by at least a second wall surrounding the exhaust passage and including a space between the first wall and the second wall;
• at least two openings in the first wall fluidly connecting the exhaust passage with the space;
• and
• at least one first valve configured to open and close to selectively allow exhaust gas to pass from the exhaust passage to the space through at least one first opening of the at least two openings;
• and
• at least one second valve configured to open and close to selectively allow exhaust gas to pass from the exhaust passage to the space through at least one second opening of the at least two openings,
• wherein the at least one first valve and the at least one second valve are different types of valves.

An exhaust system for an engine, comprising:

• an exhaust passage configured to receive exhaust from the engine;
• an exhaust stack configured to direct exhaust to the atmosphere;
• a turbocharger fluidly connected between the exhaust passage and the exhaust stack;
• an aftertreatment component including at least one conditioning member;
• and
• a bypass mechanism configured to selectively direct exhaust gas from the exhaust passage to bypass the turbine and flow into the aftertreatment component, the bypass mechanism including:
• a bypass manifold surrounding the exhaust passage;
• at least two openings in the exhaust passage fluidly connecting the exhaust passage with the bypass manifold;
• and
• at least two valves each configured to open and close a respective one of the at least two openings to selectively allow exhaust gas to pass from the exhaust passage to the bypass manifold through the respective opening,
• wherein the bypass manifold is fluidly connected to at least one entry passage fluidly connected to the at least one conditioning member,
• the at least two openings and the at least one entry passage are positioned on opposite sides of the exhaust passage, and
• the bypass manifold includes a first pathway for the exhaust gas to pass around an outside of the exhaust passage on a first side of the exhaust passage and a second pathway for the exhaust gas to pass around the outside of the exhaust passage on a second side of the exhaust passage.