| 摘要 |
PROBLEM TO BE SOLVED: To attain a sub-chamber engine maintaining a stable combustion state even when intake pressure decreases as is in starting or in low load and discharging fuel gas existing in a valve chamber of a sun-chamber fuel supply valve to a blow-by gas path through a leak gas path without leaking it to the outside. SOLUTION: When the leak gas path 35 is provided for connecting a leak part 34 formed in a gap between a valve stem 11 and a valve guide 12 of the sub-chamber fuel supply valve 15, an operation valve means 36 is provided in the leak gas part 35 and operates in a mode of blocking a gas flow from a blow-by gas path 40 side to a leak part 34 side and allowing a gas flow from the leak part 34 side to the blow-by gas path 40 side. COPYRIGHT: (C)2009,JPO&INPIT
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