| 摘要 |
PROBLEM TO BE SOLVED: To provide sufficient valve opening force on an open and close valve opening and closing a fuel passage of a regulator for a gas engine and prevent enlargement of the regulator. SOLUTION: The open and close valve 15 is provided between the fuel passages 1a, 1a making gas fuel flow to an intake pipe 3. A rod 25 provided to face the open and close valve 25 is supported by a support hole 21a of a vacuum cock main body 21 slidably in a linear motion direction. A small diameter diaphragm 2 is connected on one end of an open and close valve side of the rod and a large diameter diaphragm 26 is connected to another end. A vacuum chamber 23 is formed between both of the diaphragms, and displace the rod in the open and close valve side by difference of pressure receiving areas to open the open and close valve when intake vacuum acts thereon. Since force other than linear displacement direction of the rod does not act on the diaphragms, displacement of the diaphragm is stabilized and durability thereof is improved. Valve open action is also stabilized by linear motion. COPYRIGHT: (C)2007,JPO&INPIT |
