An integrated exhaust system apparatus configured to be mounted on an engine generating an exhaust, comprising:
- an apparatus housing including at least one apparatus housing wall defining an apparatus interior and mounting structures for mounting the apparatus housing to the engine;
- an engine interface positioned in the at least one apparatus housing wall with a plurality of exhaust apparatus inlets configured to direct the exhaust from cylinders of the engine directly through the at least one apparatus housing wall into the apparatus interior;
- an exhaust system interface positioned in the at least one apparatus housing wall with at least one first exhaust apparatus outlet configured to direct a first portion of the exhaust from the apparatus interior through the at least one apparatus housing wall;
- an EGR (exhaust gas recirculation) interface positioned in the at least one apparatus housing wall with at least one second exhaust apparatus outlet configured to direct a second portion of the exhaust from the apparatus interior through the at least one apparatus housing wall;
- an exhaust manifold arranged within the apparatus interior proximate to the exhaust apparatus inlets and extending along a manifold longitudinal axis, the exhaust manifold including:
- a manifold wall defining a plurality of inlet ports arranged in a line parallel to the manifold longitudinal axis and a manifold interior configured to receive the exhaust from the exhaust apparatus inlets, each of the inlet ports corresponding to one of the cylinders of the engine,
- a first manifold outlet within the manifold wall opening to all the plurality of inlet ports and configured to direct the first portion of the exhaust out of the manifold interior, wherein the first manifold outlet is fluidly coupled to the at least one first exhaust apparatus outlet, the first manifold outlet being arranged approximately in a center portion of the exhaust manifold along the manifold longitudinal axis such that that first portion of the exhaust flows out of the manifold interior approximately perpendicular to the manifold longitudinal axis, and
- a second manifold outlet within the manifold wall opening to all the plurality of inlet ports and configured to direct the second portion of the exhaust out of the manifold interior, the second manifold outlet being arranged proximate to a first end of the exhaust manifold along the manifold longitudinal axis;
- an EGR cooler arranged within the apparatus interior and including a plurality of EGR cooler exhaust passages with first EGR cooler exhaust passage ends fluidly coupled such that the EGR cooler exhaust passages receive the second portion of the exhaust and second EGR cooler exhaust passage ends fluidly coupled such that the second portion of the exhaust is directed out of the EGR cooler exhaust passages to be directed out of the apparatus housing via the at least one second exhaust apparatus outlet;
- and
- an EGR hot side conduit arranged within the apparatus interior and extending between the second exhaust manifold outlet and the first EGR cooler exhaust passage ends to fluidly couple the exhaust manifold to the EGR cooler, the EGR cooler exhaust passages being arranged generally parallel to the manifold longitudinal axis such that the second portion of exhaust is directed from one or more of the cylinders of the engine through the exhaust manifold at approximately 180° into the EGR cooler exhaust passages via the second manifold housing outlet and the EGR hot side conduit.