Patent ID: 6860254
Filing Date: 2005-03-01
Classification: F02D

Abstract:
1. A carburetor fuel system for delivering fuel from a constant fuel chamber to an air intake passage, said fuel system comprising: maximum flow regulating means for fuel delivered to the air intake passage; mechanical fuel control means for adjusting the quantity of fuel delivered to the air intake passage in accordance with the degree of opening of the throttle valve; and electrical fuel control means for cutting off the delivery of fuel to the air intake passage so as to achieve a required target rotational speed of the engine in a specific region of the degrees of opening of the throttle valve, wherein the electrical fuel control means cuts off fuel to the air intake passage in a region of rotational speed of the engines below a rotational speed that is set to a value below the rated idle rotational speed, in addition to cutting off and delivering fuel to the air intake passage so as to achieve a required target rotational speed of the engine in a specific region of the degrees of opening of the throttle valve.