Engine cylinder head intake port configuration

An engine operable in a horizontal and a vertical crankshaft configuration, the engine comprising:

• a cylinder block having at least one cavity defining a combustion chamber;
• a crankshaft rotatably mounted to cylinder block;
• at least one piston moveably inserted in the cylinder block cavity;
• at least one cylinder head mounted to the cylinder block and enclosing the combustion chamber, the cylinder head comprising:
• an intake port defined by a first passage in communication with the combustion chamber, the intake port having first and second flat surfaces;
• an exhaust port defined by a second passage in communication with the combustion chamber;
• an intake valve positioned to control communication of the intake port with the combustion chamber;
• an exhaust valve positioned to control communication of the exhaust port with the combustion chamber;
• and
• wherein the first flat surface of the intake port has a cross-section that is substantially horizontal when the engine is positioned in a first orientation where the crankshaft is substantially horizontally oriented;
• and
• wherein the second flat surface of the intake port has a cross-section that is substantially horizontal when the engine is positioned in a second orientation, different from the first orientation, and where the crankshaft is substantially vertically oriented;
• and wherein the intake port further comprises an intermediate flat surface between the first and second flat surfaces.

An engine operable in a first orientation and a second orientation, the engine comprising:

• a cylinder block coupled to a crankcase;
• a cylinder head coupled to the cylinder block, the cylinder head comprising:
• an intake port and an exhaust port, the intake port comprising:
• a first substantially flat surface and second substantially flat surface;
• a cross-section having an arch surface coupled at each end by a pair of substantially parallel planar surfaces, a first substantially parallel planar surface having a length longer than a second substantially parallel planar surface, the second substantially parallel planar surface coupled at an end opposite the arch surface to a chamfer surface, wherein an opposite side of the chamfered surface is connected to the first substantially parallel planar surface by a planar longitudinal surface that is opposite the arch surface;
• wherein the first substantially flat surface forms an anti-puddling surface when the engine is in the first orientation;
• and
• wherein the second substantially flat surface forms an anti-puddling surface when the engine is in the second orientation.

An engine comprising:

• a cylinder coupled to a crankcase, the cylinder having a central axis;
• a cylinder head coupled to the cylinder, the cylinder head comprising:
• an intake port and an exhaust port, the intake port comprising:
• a first planar surface that is relatively horizontal with respect to a horizon;
• a second surface adjacent to the first planar surface, the second surface being substantially perpendicular to the central axis;
• a third planar surface adjacent the second surface and opposite the first planar surface;
• and an arch surface opposite the second surface and coupled to one of the first planar surface and third planar surface.