Compac, ported cylinder construction for an opposed-piston engine

摘要

A ported cylinder for an opposed-piston engine has a bore to support movements of a pair of opposed pistons and longitudinally-spaced intake and exhaust ports that are controlled by movements of oppositely-disposed pistons in the bore. The bore includes a central portion where combustion occurs and respective end portions. Each end portion extends from an inner edge of a port to the nearest open end of the cylinder. In the central portion the bore has a standard diameter throughout. The bore has a second, larger diameter in each end portion. When the cylinder liner is cold, the bore diameter transitions continuously in size, from the standard diameter to the larger diameter, in an area running from the central portion to an inner edge of a port. From the inner edge, the bore is of the larger diameter throughout the end portion.

主权项

1. A ported cylinder of an opposed-piston engine, comprising:
a cylinder liner with a bore and longitudinally-spaced intake and exhaust ports; the intake and exhaust ports opening through the cylinder liner to the bore; and, the cylinder liner having a central portion with one or more injection ports and end portions contiguous with the central portion, in which an intake end portion includes the intake port and an intake end of the cylinder liner and an exhaust end portion includes the exhaust port and an exhaust end of the cylinder liner; wherein the bore has a first diameter throughout the central portion, and a second diameter, greater than the first diameter throughout each of the intake and exhaust end portions.