Fuel supplying system for internal combustion engine

In a charge forming device for an internal combustion engine having a fuel source, an induction passage, a throttle valve in said induction passage for controlling the flow therethrough, and an accelerating pump for pumping fuel from said fuel source in response to opening of said throttle valve, the improvement comprising first discharge means for discharging fuel from said accelerating pump into said induction passage upstream of said throttle valve during at least a portion of the cycle of operation of said accelerating pump, second discharge means for discharging fuel from said accelerating pump into said induction passage downstream of said throttle valve during at least a portion of the cycle of operation of said accelerating pump, and means for prolonging the discharge of fuel from said second fuel discharge means after said accelerating pump completes its stroke.

In a charge forming device for a crankcase compression two-cycle internal combustion engine having a scavenge passage extending between the crankcase and the combustion chamber for transferring a charge thereto for an internal combustion engine having a fuel source, an induction passage, a throttle valve in said induction passage for controlling the flow therethrough, and an accelerating pump for pumping fuel from said fuel source in response to opening of said throttle valve, the improvement comprising first discharge means for discharging fuel from said accelerating pump into said induction passage upstream of said throttle valve during at least a portion of the cycle of operation of said accelerating pump, second discharge means for discharging fuel from said accelerating pump into said induction passage downstream of said throttle valve during at least a portion of the cycle of operation of said accelerating pump, and said second fuel discharge means discharges into said scavenge passage.

A charge forming device for an internal combustion engine having an induction passage, a throttle valve for controlling the flow through said induction passage, a fuel source, a main fuel discharge for delivering fuel from said fuel source to said induction passage upstream of said throttle valve, an accumulator chamber in communication with said fuel source and adapted to retain a predetermined charge of fuel, and discharging means responsive to deceleration for communicating said accumulator chamber with said induction passage downstream of said throttle valve in resposne to a deceleration and during such deceleration for discharging said predetermined charge of fuel.

A charge forming device for a crankcase compression two-cycle internal combustion engine having a scavenge passage extending between the crankcase and the combustion chamber for transferring a charge thereto said charge forming device having an induction passage, a throttle valve for controlling the flow through said induction passage, a fuel source, a main fuel discharge for delivering fuel from said fuel source to said induction passage upstream of said throttle valve, an accumulator chamber in communication with said fuel source and adapted to contain a charge of fuel, and discharging means for communicating said accumulator chamber with said scavenge passage.

A charge forming device for an internal combustion engine having an induction passage, a throttle valve for controlling the flow through said induction passage, a fuel source, a main fuel discharge for delivering fuel from said fuel source to said induction passage upstream of said throttle valve, an accumulator chamber in communication with said fuel source and adapted to contain a charge of fuel, means for charing said accumulator chamber with fuel upon the opening of said throttle valve, and discharging means for communicating said accumulator chamber with said induction passage downstream of said throttle valve, said discharge means providing means for discharging a predetermined amount of fuel immediately upon the cessation of charging of said accumulator chamber and for discharging the remainder of the fuel under extreme deceleration conditions.

A charge forming device for a two-cycle crankcase compression internal combustion engine having an induction passage, a throttle valve for controlling the flow through said induction passage, a fuel source, a main fuel discharge for delivering fuel from said fuel source to said induction passage upstream of said throttle valve, discharge means being positioned immediately adjacent the downstream side of the throttle valve for communicating fuel from said fuel source with said induction passage downstream of said throttle valve and also communicating fuel with said crankcase, a scavenge passage extending between the crankcase and the combustion chamber for transferring a charge thereto and the discharge means further discharging into the scavenge passage, and means for providing for discharge of fuel from said discharge means to the respective passage, crankcase and scavenge passage only during decelerations.