PURPOSE: To permit stable combustion by providing a steep slant surface extending upwards from the ridgeline of bulging portion of piston on the side walls of bulging portion of cylinder head, while providing a pair of ignition plugs on the top surface of combustion chamber of the cylinder head.
CONSTITUTION: A peripheral portion of the inner wall of cylinder head is formed with an annular flat surface 12, and the top surface of piston is formed with an annular flat surface 13. When the piston 2 reaches the upper dead point, an annular squish area S is formed between both surfaces 12, 13. Also, on the top surface 14 of combustion chamber in cylinder head are provided a pair of ignition plugs 10, 11. Further, a spherical squish area T is formed between a bulging portion 16 formed on the top surface 14 of the combustion chamber and the back surface 18 of the bulging portion 17 on the top surface of piston.
OKUMURA TAKESHI
DEGUCHI RIYUUICHI
TANAHASHI TOSHIO
| JPS5385404U | 1978-07-14 | |||
| JPS51130707A | 1976-11-13 |
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