Acceleration apparatus of carburetor

Abstract

The invention provides an inexpensive acceleration apparatus of a carburetor which can stably supply a fuel for acceleration for a long time. In the acceleration apparatus of the carburetor, a cam lever (8) provided with a cam surface (8A) is fixed to a throttle valve operating shaft (4A) disposed between a throttle lever (5) and an end portion (3A) of a supporting boss (3). A first lever (10) is brought into contact with the cam surface (8A) of the cam lever by a first spring (12) for urging in a first rotational direction (A). A second lever (11) is brought into contact with a restriction portion (10C) of the first lever (10) by a second spring (13) for urging in a second rotational direction (B), and is arranged in such a manner as to be brought into contact with a pump rod (6H) for pressing a pump diaphragm (7) of a pump apparatus (P). A contact portion (K) of the first lever (10) brought into contact with the cam surface (8A) of the cam lever (8) is arranged between the throttle lever (5) and the end portion (3A) of the supporting boss (3) in a direction of a longitudinal axis (Y—Y) of the throttle valve operating shaft (4) and within a projected plane of the throttle lever (5) on a surface perpendicular to the longitudinal axis (Y—Y) of the throttle valve operating shaft (4).

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