Electric control method for fuel injection and ignition timing

摘要

In a method and apparatus for controlling a combustion engine, a digital computer is adapted to calculate first and second values corresponding to optimal settings of fuel injectors and spark plugs in a time sequence by detecting changes of the amount of air flowing into the engine and the rotation speed of the engine. The computer is programmed to calculate the first and second values from functions describing desired relationships among each setting of the fuel injectors and the spark plugs, the amount of air flowing into the engine and the rotation speed of the engine, thereby to eliminate a conventional negative pressure detecting element.