| 摘要 |
PURPOSE:To make it possible to perform the highly accurate air-fuel ratio feedback control by obtaining the air-fuel ratio of the intake air-fuel mixture of an a engine based on the intake air quantity of the engine and the amount of supplied fuel. CONSTITUTION:A fuel injection valve 6 is conducted with the injection pulse signal from a control unit 12, and the valve is opened. The fuel, which is adjusted to the specified pressure, is injected and supplied into an engine 1. The unit 12 has a microcomputer, receives the input signals from various kinds of sensors, sets the amount of the fuel injection with the injection valve 6 by operation and controls the operation of the injection valve based on the amount of the fuel injection. A air-fuel ratio sensor 16 supplies a current into a zirconia element part so that the deviation of the electromotive force generated by the partial pressure difference of oxygen from a balance point becomes zero and detects the air-fuel ratio based on the current level. The CPU housed in the unit 12 corrects and controls the air-fuel ratio feedback, sets the fuel- injection pulse width and controls the fuel supply into the engine 1. |
