FUEL CONTROLLER OF ENGINE

PURPOSE:To improve purifying action of exhaust, by supplying excess fuel to an engine for its warming, controlling the excess fuel through a load of the engine and temperature of a catalyst and promoting warming of the catalyst. CONSTITUTION:An engine temperature sensor 7 and engine speed sensor 8 are provided to an engine 1, while a load sensor 6, detecting intake negative pressure, and catalytic temperature sensor 11, detecting catalytic temperature, are provided respectively to an intake passage 3 and a catalytic converter 10 provided in an exhaust passage 9. Further a fuel supply controller 5 is constituted from a basic signal generator circuit 13, excess fuel correcting circuit 14, the first warming condition detector circuit 15, the second warming condition detector circuit 16 and switching circuit 17. When catalytic temperature is in a prescribed value or less, an output of the first warming condition detector circuit 15 is fed to the excess fuel correcting circuit 14, if the catalytic temperature reaches the prescribed value, the excess fuel correcting circuit 14 controls to lower a correcting quantity of fuel, and warming of a catalyst can be promoted.