Internal-combustion engine with precombustion chamber and controlled ignition

An internal combustion engine with controlled ignition, comprising:

• at least a cylinder,
• a cylinder head sealing the cylinder,
• a piston mounted to slide inside the cylinder,
• a combustion chamber defined inside the cylinder between an upper face of the piston and a lower face of the cylinder head,
• a precombustion chamber delimited by a wall, the precombustion chamber communicating with the combustion chamber through at least a port formed in the wall,
• means for injection of fuel or an air-fuel mixture into the combustion chamber, the means for injection being adapted to inject the fuel into the combustion chamber at a pressure of at least 250 bar such as to create an air-fuel mixture and to make it easier for a part of this mixture to penetrate inside the precombustion chamber,
• ignition means to generate an ignition of the air-fuel mixture in the combustion chamber, the ignition means comprising a spark generator arranged in the precombustion chamber.