Double crowned engine piston - has top crown forming combustion chamber base and bottom one deflecting oil

摘要

The double-crowned piston of the main patent has a top crown (b) acting as heat base for the combustion chamber, and a bottom one (a) as a spray crown deflecting oil, and can be dismantled. Distance pieces can be fitted between the two crowns, and the piston can be arranged to dissipate high temperature from the piston rings.