ACCELERATION DEVICE IN A CARBURETOR

摘要

A carburetor having an acceleration device including a pump operative during opening of the throttle valve to feed fuel to a spray nozzle arranged on the upstream side of the choke valve, the throttle valve being formed with an aperture to allow the fuel spray from the nozzle to proceed freely towards the engine even when the choke valve is closed. There is no unwanted squirt of fuel in engine starting or high speed operation and formation of any overrich fuel-air mixture or depletion of the fuel passage extending to the nozzle is effectively prevented.