To facilitate fine regulation of engine speed in a working rotating range by providing with a non-linear interlocking mechanism for suppressing a fluctuation rate of engine speed in relation to an unit manipulated variable of a hand acceleration operating tool in a high rotating range for work, smaller than a fluctuation rate in a region of a high rotating range and less.
In an acceleration device A, a hand acceleration lever 7 is pivotally supported at a sliding axial core P of right and left directions freely to oscillate in the longitudinal direction, and an acceleration wire 15 is pivotally supported and connected to the action support point X of its lever lower end. In a condition in which the lever 7 is positioned on a forefront side of an acceleration offcondition, the supporting point X is positioned just below the axial core P. In a full-accelerating condition in which the lever 7 is positioned in a farthest backward direction, the radial of the axial core P of the supporting point X in relation to the manipulated variable of the wire 15 is set so as to position the supporting point X just beside the axial core P. The manipulated variable of the wire 15 of the lever 7 slant angle makes in a maximum level in the vicinity of a lowest speed position S, and makes in a minimum level in the vicinity of a highest speed position H.
MINAMI TERUO
KOMOTO NOBUMI
INOMATA HIROAKI
