JPS57181954A - Starter for carburetor - Google Patents

Abstract

PURPOSE:To produce the mixture gas optimal to the operating condition having the good starting performance, by providing a starting fuel chamber and an auxiliary fuel chamber in a carburetor then supplying the dense mixture gas at the start of an engine under the low temperature while automatically diluting the mixture gas at the operation of a warming machine. CONSTITUTION:Upon turning on of a main switch at the start of an engine, a starting gate valve 22 will move upward thus to open the starting air path 19 and the mixture gas path 20. When cranking under this state, the negative pressure produced in a suction path 2 will function on the paths 19, 20 while since the starting fuel will flow through a fuel jet 14 and an auxiliary jet 35 into the starting fuel chamber 15 the dense mixture gas is supplied to the engine. After complete combustion when the engine will enter into the warming operation, a vacuum piston 30 is moved upward by the negative pressure due to the complete combustion thus to choke a valve seat 26, thereby the fuel will not enter into the auxiliary fuel chamber 25 thus to dilute the mixture gas gradually. After warming the engine sufficiently the operator will return the valve 22 to choke the valve seat 17 and the paths 19, 20 thus to stop the supply of the starting fuel and the mixture gas having the normal setting density is produced.