Patent ID: 7814883

Claim:
An internal combustion engine, comprising: a main combustion chamber partially bounded by a cylinder and a crown of a piston disposed within the cylinder; an auxiliary combustion chamber adjacent to the main combustion chamber and smaller in capacity than the main combustion chamber; a partition wall between the main combustion chamber and the auxiliary combustion chamber, the partition wall including an injection hole by which the main combustion chamber and the auxiliary combustion chamber communicate; means for supplying fuel to the main combustion chamber so that a mixture of air and the supplied fuel is formed in the main combustion chamber, means for creating a flow of intake air to stratify the mixture of air and fuel away from the partition wall before ignition such that the mixture is leaner in the vicinity of the injection hole in the partition wall and richer away from the injection hole in the partition wall; means for supplying fuel to the auxiliary combustion chamber; and means for igniting the fuel in the auxiliary combustion chamber, so that an ejecting torch flame is propelled through the injection hole into the mixture of air and fuel in the main combustion chamber, thereby burning the mixture of air and fuel in the main combustion chamber.