| 摘要 |
PROBLEM TO BE SOLVED: To properly supply a positive pressure vaporized gas of LPG throughout the whole operation area of an engine without combining injection valves of various dynamic ranges, or using an injection valve of a large diameter. SOLUTION: The injection valve 22 for injecting the vaporized gas in accordance with a duty cycle, and a switching valve 24 for sending the vaporized gas in accordance with a switching instruction signal are mounted in an intake conduit 16, the vaporized gas is supplied only by the injection valve 22 in an area where the vaporized gas request flow rate of the engine 15 is less than the predetermined flow rate, and the vaporized gas is supplied by both of the injection valve 22 and the switching valve 24 in an area where the vaporized gas request flow rate is more than the predetermined flow rate. The request flow rate of high load area can be achieved in the dynamic range of the injection valve 22 by simultaneously using the switching valve 24. COPYRIGHT: (C)2004,JPO |
