Patent ID: 9163505
Filing Date: 2015-10-20
Classification: F01B,F02B,F02M,Y02T

Abstract:
1. An internal combustion engine including at least one cylinder with longitudinally-separated exhaust and intake ports and a pair of pistons disposed in opposition to one another in a bore of the cylinder, each piston including a cooling gallery and a crown with an end surface identical to the end surface of the opposing piston, in which the end surface of each piston has a periphery, an elongated bowl adjoined by a curved ridge, and two aligned notches that extend through the periphery into the bowl, wherein the end surface cooperates with the end surface of the opposing piston to define a combustion chamber with a generally ellipsoidal shape, and each cooling gallery has an asymmetric profile that rises under the ridge and that slants upwardly under a concave portion of the bowl, and a port is positioned in each cooling gallery to receive a jet of liquid coolant.