| 摘要 |
PROBLEM TO BE SOLVED: To provide a practicable system that injects vaporized gas of LPG at a low positive pressure precluding liquefaction and supplies an engine-required flow rate. SOLUTION: One injection valve 17 is disposed, for every cylinder 22, in an intake manifold 23 to inject vaporized gas regulated in a pressure regulator 6 to a positive pressure lower than the critical pressure, at injection timing set in a range of an exhaust stroke and a subsequent suction stroke of the corresponding cylinder 22. Fuel for an operating range with a small engine- required flow rate is injected in a range with a small pressure difference between the vaporized gas pressure and an intake manifold negative pressure, and fuel for an operating range with a large engine-required flow rate is injected in a range with a large pressure difference, so that an appropriate quantity of fuel is supplied through a limited dynamic range of the injection valve 17. COPYRIGHT: (C)2004,JPO |
