Electronically controlled type floatless carburetor

An electronically controlled type floatless carburetor wherein fuel is delivered to a fuel regulating chamber by actuation of pumping means, the fuel from said fuel regulating chamber is ejected in a suction passage from a main nozzle via a main fuel passage including a main, jet and moreover, the fuel from said fuel regulating chamber is ejected in said suction passage from a slow system ejection port via a pilot fuel passage including a pilot jet, comprising:

• a pilot bypass passage by way of which a position located on the upstream side of said pilot jet is communicated with a position located on the downstream side of the same;
• a pilot solenoid valve disposed at the intermediate position of said pilot bypass passage to adjust a quantity of fuel passing through said pilot bypass passage by duty driving;
• and
• an electronic controlling circuit for controlling actuation of said pilot solenoid valve in response to inputting of one or more parameters,
• wherein the quantity of fuel ejected in said suction passage from the slow system ejection port includes a quantity of fuel adjusted by duty driving while passing through said pilot bypass passage as said pilot solenoid valve is actuated and a quantity of fuel passing through said pilot jet.

An electronically controlled type floatless carburetor wherein fuel is delivered to a fuel regulating chamber by actuation of pumping means, the fuel from said fuel regulating chamber is ejected in a suction passage from a main nozzle via a main fuel passage including a main jet, and moreover, the fuel from said fuel regulating chamber is ejected in said suction passage from a slow system ejection port via a pilot fuel passage including a pilot jet, comprising:

• a main bypass passage of which one end is communicated with said main fuel passage located downstream of said main jet;
• a pilot bypass passage of which one end is communicated with said pilot fuel passage located downstream of said pilot jet,
• the other end of said main bypass passage and the other end of said pilot bypass passage being united with each other to form a fuel introduction passage which is communicated with said fuel regulating chamber so as to bypass said main and pilot jets;
• a solenoid valve disposed at the intermediate position of said fuel introduction passage to adjust a quantity of fuel passing through said fuel introduction passage by duty driving;
• and
• an electronic controlling circuit for controlling actuation of said solenoid valve in response to inputting of one or more parameters,
• wherein the quantity of fuel ejected in said suction passage from said main nozzle includes a quantity of fuel adjusted by duty driving while passing through said main bypass passage as said solenoid valve is actuated and a quantity of fuel passing through said main jet and moreover, the quantity of fuel ejected in said suction passage through said slow system ejection port includes a quantity of fuel adjusted by duty driving while passing through said pilot bypass passage and a quantity of fuel passing through said pilot jet.

An electronically controlled type floatless carburetor wherein fuel is delivered to a fuel regulating chamber by actuation of pumping means, the fuel from said fuel regulating chamber is ejected in a suction passage from a main nozzle via a main fuel passage including a main jet, and moreover, the fuel from said fuel regulating chamber is ejected in said suction passage from a slow system ejection port via a pilot fuel passage including a pilot jet, comprising:

• a main bypass passage by way of which a position located on the upstream side of said main jet of said main fuel passage is communicated with a position located on the downstream side of the same;
• a main solenoid valve disposed at the intermediate position of said main bypass passage to adjust a quantity of fuel passing through said main bypass passage by duty driving;
• a pilot bypass passage by way of which a position located on the upstream side of said pilot jet is communicated with a position located on the downstream side of the same;
• a pilot solenoid valve disposed at the intermediate position of said pilot bypass passage to adjust a quantity of fuel passing through said pilot bypass passage by duty driving;
• and
• an electronic controlling circuit for controlling actuation of said main solenoid valve and said pilot solenoid valve in response to inputting of one or more parameters,
• wherein the quantity of fuel ejected in said suction passage from said main nozzle includes a quantity of fuel adjusted by duty driving while passing through said main bypass passage as said main solenoid valve is actuated and a quantity of fuel passing through said main jet, and
• wherein the quantity of fuel ejected in said suction passage from the slow system ejection port includes a quantity of fuel adjusted by duty driving while passing through said pilot bypass passage as said pilot solenoid valve is actuated and a quantity of fuel passing through said pilot jet.