| 摘要 |
PROBLEM TO BE SOLVED: To provide a preignition prevention device for a two-stroke engine in which preignition caused by self-ignition of a cylinder lubricant can be prevented by suppressing the cylinder lubricant from being mixed into an air-fuel mixture of a gas fuel and air, and output increase and reduction of cylinder lubricant consumption can be attained.SOLUTION: A cylinder lubricant recovering means 17 is provided for recovering a cylinder lubricant held in a portion of a ring pack 15 of a piston 7 from being injected to a scavenging chamber 5 while being accompanied with a flow of an internal gas injected from a scavenging port 4 into the scavenging chamber 5 when a top ring 15a mounted to the piston 7 comes to a position of the scavenging port 4 during a falling process of the piston 7. |
