TWO-STROKE INTERNAL COMBUSTION ENGINE

摘要

The engine is provided with a mask wall (8a) which is formed between a suction valve (6) and an exhaust valve (7) which are arranged above an inner surface (3a) of a cylinder head, and which is adapted to close throughout a period in which the suction valve (6) is fully opened an opening between that part of the circumferential portion of the suction valve (6) which is on the side of the exhaust valve (7) and a valve seat (9). A fuel injection valve (14) is provided at the circumferential portion of the inner wall surface (3a) of the cylinder head which is on the side of the feed valve (6). The injection of fuel from the fuel injection valve (14) into a cylinder (1) is started when the suction valve (6) is opened.