Patent ID: 9512779
Filing Date: 2016-12-06
CPC Classification: F01B,F02B,Y02T

Claim Text:
1. A combustion chamber construction for an opposed-piston engine including at least one cylinder with a bore and longitudinally-separated exhaust and intake ports and a pair of pistons disposed in opposition to one another in the bore of the cylinder, in which: the pistons have shaped end surfaces that form a combustion chamber having an elongated, bilaterally symmetrical shape referenced to a plane of symmetry that includes an injection axis of the combustion chamber and a pair of injection ports located on the injection axis when the pistons are near respective top center positions in the cylinder; the combustion chamber is defined between a bowl in the end surface of a first piston of the pair of pistons and a generally convex portion of the end surface of a second piston of the pair of pistons that comprises outwardly protruding mirrored ridges and a cleft between the outwardly protruding mirrored ridges, as the bowl in the end surface of the first piston receives the convex portion and covers the cleft; when the end surface of the second piston is viewed in plan, each ridge includes a central portion that curves toward a periphery of the end surface of the second piston and transitions to respective flanking portions that curve away from the periphery; and, the cylinder includes a pair of opposed fuel injector ports with which the injection ports of the combustion chamber align when the first and second pistons are near the respective top center positions.