| 摘要 |
PURPOSE:To secure such a controller that operates with certainty in an inexpensive manner, by installing a main fuel system having a solenoid control valve and a bypass system having an on-off valve being opened in time of starting, deceleration and stoppage both in a carburetor slow system. CONSTITUTION:A carburetor slow system 11 is supplied with fuel from a passage 7 as well as from a main fuel system 11a having a control valve 13 and a bypass fuel system 11b having an on-off valve 16 after mixing a bleed air out of a passage 9. In time of engine starting, suction pressure is low so that even if a hole 18c closes, closing the valve 16 with a spring, the valve 13 is opened by the output of a controller 14, thus sufficient fuel is fed out of the main fuel system. In time of deceleration, the hole 18c is opened by dint of high suction pressure, the vale 16 is closed by leading the air and since the valve 13 is also being closed, fuel is cut down in consequence. At the latter half period, the suction pressure comes little and the hole 18c is closed but with the suction pressure, the valve 16 opens whereby a fuel supply is reopened. In time of stoppage, the valve 16 closes like in time of starting, and the valve 13 is also closed whereby fuel is cut. |
