| 摘要 |
PURPOSE:To provide a combustion cylinder without imperfect combustion etc. by installing a bottom ring at the end of the outer combustion cylinder in such a way that the dia. size at the bottom end of the ring is suitable to be placed on the two-stage terraced part of the bowl. CONSTITUTION:As the outer combustion cylinder 6 is held on the outer bowl 4 by the bottom ring 7, of which inner dia. size (c) is almost equal to the inner dia. size (d) of the outer bowl, so it is not necessary to make expansion or terraced part for the end of outer combustion cylinder 6. The bottom ring 7 is simply shaped by press work and has accurate sizes in all parts due to the one body by press work and also the gap of the contact parts between the bottom ring and two-stage terraced part or the bowl is small and therefore, uniform combustion is possible.
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