| 摘要 |
PURPOSE:To prevent change of air-fuel ratio by controlling an adjusting valve for the aux. fuel passage, furnished in parallel with the fuel system, on the basis of the pressure between a pressure control valve and an injection adjusting valve in the LPG fuel system, and thereby suppressing the pressure change caused by temp. change of the LPG. CONSTITUTION:A fuel system 12 connecting the LPG container 7 with the injection nozzle 5 is equipped with an opening/closing valve 9 to open in linkage with a starter switch 13, a pressure control valve 10 to control the pressure at a constant value, and an adjusting valve 11 to be controlled by an electronic control device 31, into which signals are fed from such sensors 15-20 as suction neg. pressure sensor, number-of-revolutions sensor, exhaust gas composition sensor, etc. The aux. fuel passage 21 as by-pass for this adjusting valve 11 is equipped with another adjusting valve 22, and this adjusting valve 23 is so controlled as to be opened and closed to suppress the pressure change on the basis of the data given by a pressure sensor 23, which is to sense the LPG pressure between the adjusting valve 11 and pressure control valve 10 in the main fuel passage 8. |
