| 摘要 |
An enclosed combustion chamber (6) is formed by moving a movable sleeve (10) provided at a hammering cylinder (3) up and down thereby butting the movable sleeve (10) against a cylinder head (8) above the hammering cylinder (3). Flammable gas and air are stirred in the combustion chamber (6) by means of a rotary fan (21) to produce mixture gas which is then ignited by means of an ignition plug (20) and combusted explosively. High pressure combustion gas acts on a hammering piston (4) to drive the piston impulsively, and a driver (5) coupled to the lower surface of the hammering piston (4) hammers out a stud. The upper wall surface on the outside of the combustion chamber (6) is located remotely from the ignition plug (20) in order to decrease the current velocity of the mixture gas passing trough the upper wall surface sufficiently enough to cause no trouble in ignition when the gas reaches the ignition plug (20). A groove (22) opening to the combustion chamber (6) is formed in the upper wall surface.
|
