AIR-FUEL RATIO CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINE
PURPOSE:To stabilize the air-fuel ratio and improve the drivability and gas exhaustion function by detecting the temperature of waste gas by the rotational speed and load detected according to the driving condition of the internal combustion engine, and feed-back controlling the air-fuel ratio based...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To stabilize the air-fuel ratio and improve the drivability and gas exhaustion function by detecting the temperature of waste gas by the rotational speed and load detected according to the driving condition of the internal combustion engine, and feed-back controlling the air-fuel ratio based on the detected value and the actual temperature of the exhaust gas. CONSTITUTION:To a control unit 11 are supplied detected values from a rotational speed sensor 2, an exhaust gas temperature sensor 7, a throttle opening degree sensor 8, a water temperature sensor 7, an EGR valve operating switch 10 and an air flowmeter 14. From these detected values, the output values of the exhaust gas temperature sensor according to the rotational speed and the load are detected. These detected values are compared with the actual detected values, and errors are corrected by a built-in deviation circuit, and the air-fuel ratio is feedback-controlled so that the temperature of the exhaust gas becomes the established detected value. |
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