| CPC F01N 13/10 (2013.01) [F02B 37/001 (2013.01); F02B 2075/1824 (2013.01)] | 15 Claims |
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1. A combustion engine comprising:
a cylinder head including:
a first set of cylinder head flow paths internal to the cylinder head; and
a second set of cylinder head flow paths internal to the cylinder head; and
an exhaust manifold including:
a first exhaust manifold flow path internal to the exhaust manifold that is fluidly couplable with the first set of cylinder head flow paths, the first exhaust manifold flow path including:
a set of at least three exhaust manifold inlets couplable to the cylinder head to receive exhaust gases from the first set of cylinder head flow paths; and
a first exhaust manifold outlet;
at least three branches fluidly coupling the set of at least three exhaust manifold inlets with the first exhaust manifold outlet, wherein the at least three branches include:
a central branch extending along a plane;
an outer branch having an outer curvature along the plane; and
a middle branch between the central branch and the outer branch having a maximum curvature along with plane that is less than the outer curvature of the outer branch, wherein the central branch intersects a first end of the exhaust manifold at a first angle, the middle branch intersects the first end of the exhaust manifold at a second angle, and the outer branch intersects the first end of the exhaust manifold at a third angle, wherein the first angle is greater than the second angle, and the second angle is greater than the third angle, and wherein the first set of cylinder head flow paths include three cylinder head flow paths, and wherein the three cylinder head flow paths are curved based on the first angle of the central branch, the second angle of the middle branch, and the third angle of the outer branch; and
a second exhaust manifold flow path internal to the exhaust manifold, separate from the first exhaust manifold flow path, that fluidly couples the second set of cylinder head flow paths to a second exhaust manifold outlet.
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