| 摘要 |
<p>PROBLEM TO BE SOLVED: To exactly control the three expansion speeds of low speed, medium speed and high speed. SOLUTION: Breaking of a second blockade member 13 between a first chamber 3 and a second chamber 4 is divided into a first stage in which a part of a bottomed hole 13c is a little broken by the pressure of combustion gas introduced through a vent hole 11 from the first chamber 3 into the second chamber 4 by means of ignition of a first ignition means 8, and a second stage in which breaking is greatly performed by the pressure of combustion gas in the second chamber 4, which is increased when a second ignition means 14 is subsequently ignited. Thus, the difference between a single ignition mode caused by only a first ignition member 8, and a time difference ignition mode for igniting the first and second ignition members 8, 14 becomes clear. The variability in expansion is large, and the expansion speeds are exactly controlled.</p> |
