| 摘要 |
PURPOSE:To make ample fuel quantity corresponding to engine load securable, by making up a secondary decompression chamber of a two-stage decompression type vaporizer into an almost identicl mechanism as a primary decompression chamber, while controlling a fuel quantity control part in stte that secondary decompression chamber's pressure is altered in a manner conformable to the engine load. CONSTITUTION:A primary side pressure reducing valve 6, which closes at a time when pressure in a chamber 2 grows larger than primary side setting pressure P1 dependent upon a pressure-regulating spring 5 pressing a diaphragm 4 related to at least the chamber 2, is installed in position between the primary side diaphragm chamber 2 of a vaporizer 2 vaporizing and decompressing liquefied petroleum gas and a fuel tank 3. Likewise, a secondary side pressure reducing valve 12, which mkes pressing force in a diaphragm 10 related to a chamber 9 in proportion to an increase of engine load and closes at a time when pressure in the chamber 9 grows larger than secondary side setting pressure P2 (<P1) in the chamber 9, is installed in position between the secondary side diaphragm chamber 9 to be connected to a suction system 8 and the said chamber 2. In addition, an on-off vale 15 and a fuel quantity control valve 17 both are interposingly installed in a fuel passage 13 led from the chamber 9.
|
