Variable venturi type carburetor

摘要

A variable venturi type carburetor comprising a carburetor body having an intake passage in which is disposed a slide valve slidably supported for travel across the intake passage to function as a variable venturi. A butterfly throttle valve is pivotably supported by the body in the intake passage downstream of the slide valve. A low-speed fuel passageway and a main fuel passageway open into the intake passage proximate the butterfly throttle valve and directly below the slide valve respectively. The slide valve and butterfly throttle valve are interconnected by a linkage for interlocked operation over a range from their fully closed positions to their fully opened positions with the degree of opening of the slide valve being greater than that of the butterfly valve by a predetermined magnitude at least for low opening degrees thereof. An external force is applied to one of the valves to operate that valve and the other of the valves conjointly therewith.