| 摘要 |
PURPOSE:To match the control characteristic of slow system mixture gas path in a feedback control carburetor with that of main fuel system while to prevent paper lock by providing a bypath having smaller diameter than main path having large diameter and provided with a control valve then performing duty ratio control of said control valve. CONSTITUTION:Fuel fed from a float chamber through a fuel path 6 is weighed by a jet 7 while bleed air is weighed by a jet 9 then they are mixed in a chamber 8 and fed through main path having a large diameter jet 11 and a control valve 12 for opening/closing said jet 11 and a bypath 10b having a small diameter jet 13 to an idle port 4 and a bypass hole 3 provided near the closing section of throttle valve 2 for carburetor. The control valve 12 is subjected to conventional feedback control where the control width is set freely on the basis of the diameters of said jets 11, 13 to match the characteristic with that of main fuel system while since the mixture gas exists at the control section, occurrence of paper lock at this section can be prevented. |
