Patent ID: 8807115

Claim:
A compression ignition engine, comprising: a cylinder; a piston reciprocally displaceable within the cylinder, wherein the piston comprises a recess in a top wall of the piston wherein the recess forms a combustion chamber, wherein the area on the top wall of the cylinder between the recess and the circumference of the top of the cylinder forms a squish area and the squish area is at least approximately 75% of the cross-sectional area of the cylinder; a fuel injector for injecting fuel into the cylinder, wherein the fuel injector comprises one or more ports forming a stream of fuel directed into the cylinder so that a majority of the stream is directed outside the recess; a controller for controlling the timing of the fuel injection so that during the fuel injection the fuel injector sprays a majority of the fuel stream outside the recess in the piston; wherein during operation, the fuel injector injects fuel into the cylinder which mixes with air in the cylinder and the piston compresses the fuel and air mixture until the mixture ignites.