To provide a high-efficient spark ignition type two-stroke cycle internal combustion engine obtaining a stable and proper combustion condition over a wide engine running area, and having a small hydrocarbon discharge.
A spark ignition type two-cycle internal combustion engine 1 equipped with a subsidiary chamber is equipped with an accumulator filled with pressure air, an opening/closing valve 19 for opening/closing freely communicating the accumulator and the subsidiary chamber, a fuel injecting means 34 for injecting fuel toward the accumulator 18, and a controlling means 42 for opening the valve 19 being blocked at a given crank angle in accordance with engine running change quantity such as an engine revolution or engine output, and also actuating the means 34 being stopping injection after a given crank angle is rotated in accordance with the engine running change quantity such as an engine revolution or engine output.
TSUSHIMA YUJI
NANBA YOSHIHIDE
UEDA MINORU
YAMASHITA HIROSHI
TANAKA HIROSHI
