Exhaust discharge system

A method of assembling an exhaust discharge system for a machine, the exhaust discharge system including an exhaust stack having a first conduit and a second conduit, the first conduit defining a first flow passageway and arranged around a first longitudinal axis, the first conduit including a skirt portion and a body portion, the skirt portion oriented to slope outward from the body portion, wherein the skirt portion includes a base configured to be mounted on an outside surface of a housing that is configured to at least partially enclose the engine of the machine, the second conduit defining a second flow passageway downstream of the first flow passageway and arranged around a second longitudinal axis, the second conduit including a sidewall and an exit port, wherein the exhaust stack has a junction at which the second conduit intersects the first conduit, wherein further a first length of the second conduit from the exit port to the junction is greater than a height of the first conduit from the base to the junction, the exit port having an exit-port cross-section, wherein the exit-port cross-section is oblong in shape, the second longitudinal axis is disposed at an intersection angle to the first longitudinal axis in a range of 125° to 150°, and the exhaust stack is configured to convey treated exhaust from the skirt portion to the exit port, the method comprising:

• mounting the exhaust stack on the machine to at least partially enclose an engine of the machine.

An exhaust system disposed on a machine having an engine and a housing that at least partially encloses the engine, the exhaust system comprising:

• an aftertreatment apparatus configured to receive exhaust from the engine and to output a treated exhaust to an exhaust stack;
• the exhaust stack includes a first conduit and a second conduit;
• the first conduit defining a first flow passageway and arranged around a first longitudinal axis, the first conduit including a skirt portion and a body portion disposed downstream of the skirt portion, the skirt portion oriented to slope outward from the body portion, the skirt portion including a base disposed on the housing;
• a second conduit disposed downstream of the first conduit, the second conduit defining a second flow passageway and arranged around a second longitudinal axis, the second conduit including a sidewall and an exit port, the exit port having an exit-port cross-section, wherein the exit-port cross-section is oblong in shape, and wherein the exhaust stack has a junction at which the second conduit intersects the first conduit, wherein further a first length of the second conduit from the exit port to the junction is greater than a height of the first conduit from the base to the junction;
• wherein the second longitudinal axis is disposed at an intersection angle to the first longitudinal axis, the intersection angle in a range of 125° to 150°;
• and
• wherein the exhaust stack is configured to convey the treated exhaust from the aftertreatment apparatus to the exit port.