| 摘要 |
PURPOSE:To hold air fuel ratio in a high load range to an adequate value in an engine which reduces a quantity of supply fuel when a throttle valve opening is changed to a decreasing direction, by constituting the engine not to reduce said quantity of fuel when the engine is in the high load range. CONSTITUTION:In case of control of air fuel ratio by controlling a fuel injection valve 28 arranged in a position approximately to an intake port part in an intake passage through a control circuit 18, each output signal of a pressure sensor 14 detecting absolute pressure in an intake pipe, throttle sensor 15 and crank angle sensor 22 is input to the control circuit 18. Then an injection signal corresponding to an injection time is output from a built-in CPU34 in accordance with an operational condition parameter to the injection valve 28 through a driver circuit 42. When a throttle valve opening by the sensor 15 is changed to a decreasing direction, an injection time is decreased to reduce an injected fuel quantity, however, when an engine is in a prescribed high load range, a process of reducing the injected fuel quantity is checked. |
