To provide a divided chamber type internal combustion engine capable of enlarging a lean limit.
The divided chamber type internal combustion engine 100 is provided with a main combustion chamber 63, an auxiliary combustion chamber 161, first communicating passages 162a, 162d, and second communicating passages 162b, 162c. The auxiliary combustion chamber 161 adjoins the main combustion chamber 63. The first communicating passages 162a, 162d allow the main combustion chamber 63 and the auxiliary combustion chamber 161 to communicate with each other. In the first communicating passages 162a, 162d, the cross-sectional areas of parts close to the main combustion chamber 63 are larger than the cross-sectional areas of parts close to the auxiliary combustion chamber 161. The second communicating passages 162b, 162c allow the main combustion chamber 63 and the auxiliary combustion chamber 161 to communicate with each other. In the second communicating passages 162b, 162c, the cross-sectional areas of parts close to the main combustion chamber 63 are not larger than the cross-sectional areas of parts close to the auxiliary combustion chamber 161.
NODA TORU
Hidetada Kato
Brush treasure Mikio
Next Patent: DIVIDED CHAMBER TYPE INTERNAL COMBUSTION ENGINE