Abstract: A carburetor and associated control apparatus for an internal combustion engine. The carburetor includes a carburetor head having a fuel inlet conduit and an air inlet conduit communicating with a fuel mixing chamber. The carburetor further includes metering means for controlling the amount of fuel and air entering the mixing chamber. The mixing chamber connects to an expansion chamber through a control orifice in the carburetor head. The carburetor also includes a carburetor housing having a throat that communicates with the expansion chamber and with an air delivery passage. Air entering the throat is metered with an air valve that is moved with respect to the air delivery passage in correspondence with the fuel metering means.1. Technical FieldThis invention relates generally to fluid distribution apparatus having multiple valves and, more particularly, to carburetors and associated control apparatus for internal combustion engines.2.