Patent ID: 6510837
Filing Date: 2003-01-28
Classification: F01L,F02B,F02F,Y02T

Abstract:
A cylinder head assembly for an internal combustion engine forming three intake valve seats for serving the same combustion chamber and spaced with two of said intake valve seats comprising side intake valve seats lying closer to a plane passing through the center of the combustion chamber than the other of said valve seats with said other intake valve seat comprising a center intake valve seat, all of said intake valve seats having different diameters, a first intake port formed in said cylinder head and serving said center intake valve seat and one of said side intake valve seats, said first intake valve port having a branch portion with a central axis inclined at an acute angle to a lower sealing surface of said cylinder head and extending generally straight through its length to said center intake valve seat for delivering a charge into the combustion chamber in a direction toward said plane and at said acute angle for generating a tumble action therein and a second intake port serving the other side intake valve seat.