Patent ID: 6286472
Filing Date: 2001-09-11
Classification: F02B

Abstract:
A four stroke internal combustion engine comprising a plurality of generally horizontally extending cylinder bores having their axis spaced vertically relative to each other, a plurality of pistons each reciprocating within each one of said cylinder bores, a cylinder head closing one end of said cylinder bores, said cylinder bores, said pistons and said cylinder head generally defining respective combustion chambers for burning intake charges, said cylinder head having a plurality of air intake passages communicating with said combustion chambers for supplying at least air charge thereto, said engine further comprising a plurality of air intake ducts each defining a center axis and being connected to a respective one of said air intake passages, each one of said air intake ducts having a generally straight section extending generally horizontally and generally in parallel to each other, a distance between said center axes of said straight sections being less than a distance between axes of said cylinder bores.