FUEL FEED CONTROLLER FOR ENGINE

PURPOSE:To improve drivability and acceleration performance while to reduce fuel consumption by functioning first fuel increaser under low speed region while both of first and second fuel increasers under heavy load region. CONSTITUTION:Under low speed region where the water temperature is lower than 90 deg.C, for example, a signal from a car speed switch 20 is provided through logic gates 25, 26 to a solenoid valve 19 to open an air path 14 to the atmosphere thus to open a valve 13 in a fuel increase control valve 18 and to bring the fuel through main nozzle 7 to the maximum while under low speed region after warming-up it is condensed to improve the acceleration performance. Under heavy load intermediate speed region where a throttle valve 15 is near to full- open, negative pressure switch 22 and car speed switch 23 are turned on to provide a signal through gates 25, 26 to the solenoid valve 19 thus to increase the fuel through main nozzle 7 to the maximum while to close a solenoid valve 31 through a gate 36 to choke a bypath 30 and to function both of first and second fuel increasers 10, 11 to improve the drivability.