Patent ID: 7216623

Claim:
An internal combustion engine comprising: a main combustion chamber part; an auxiliary combustion chamber part including a first auxiliary combustion chamber disposed adjacent to the main combustion chamber part, the first auxiliary combustion chamber having a first center axis; a second auxiliary combustion chamber disposed adjacent to the first auxiliary combustion chamber at a position further away from the main combustion chamber part with respect to the first auxiliary combustion chamber, the second auxiliary combustion chamber having a second center axis; at least one first communicating passage extending between the main combustion chamber part and the first auxiliary combustion chamber so that the main combustion chamber part and the first auxiliary combustion chamber are fluidly communicated; a second communicating passage extending between the first auxiliary combustion chamber and the second auxiliary combustion chamber so that the first auxiliary combustion chamber and the second auxiliary combustion chamber are fluidly communicated; and an ignition component coupled to the auxiliary combustion chamber part, and configured and arranged to ignite a fresh air-fuel mixture introduced from the main combustion chamber into the first auxiliary combustion chamber through the first communicating passage, the ignition component having a center axis that is substantially parallel to the first and second center axes of the first and second auxiliary combustion chambers.