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Fuel injection control method for a multi-cylinder internal combustion engine, having a fail safe function for abnormality in cylinder- discriminating means
Fuel injection control method for a multi-cylinder internal combustion engine, having a fail safe function for abnormality in cylinder- discriminating means
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机译:用于具有汽缸识别装置异常的故障保护功能的多汽缸内燃机的燃料喷射控制方法
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摘要
A fuel injection control method for successively injecting fuel into a plurality of cylinders of an internal combustion engine in predetermined sequence in synchronism with pulses from top-dead-center detecting means which are successively generated immediately after generation of each pulse from cylinder-discriminating means. The method is adapted to perform a fail safe function in the event of occurrence of an abnormality in the cylinder-discriminating means. The number of pulses is counted which are successively generated from the top-dead-center detecting means immediately after generation of each pulse from the cylinder- discriminating means. If no further pulse from the cylinder- discriminating means is detected until the count of pulses from the top- dead-center detecting means reaches a number equal to the sum of the number of the engine cylinders and while the rotational speed of the engine is higher than a predetermined value, the cylinder-discriminating means is regarded as abnormal. Then, injection of fuel into the cylinders is effected in the above predetermined sequence in synchronism with pulses from the top-dead-center detecting means alone, irrespective of generation of subsequent pulses from the cylinder-discriminating means.
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