Mehrstoff-Maschinensteuerung mit Anfangsverzögerung

摘要

A fuel control for an engine using a liquid fuel mixture of two fuels such as gasoline and alcohol has a fuel composition sensor and stores a fuel composition value ALC% derived from the fuel composition sensor near the end of one period of engine operation. That value is used in place of the actual fuel composition sensor output for a predetermined time IERT, e.g. 10-15 sec, at the start of the next period of engine operation. The predetermined time IERT is at least long enough for the fuel movement caused by the fuel pump to remix separated fuel in the vicinity of the fuel composition sensor and may conveniently be the period of time from the initiation of fuel pump activity until the time that fuel from the fuel tank would be expected to at least reach the fuel composition sensor. The time IERT also negates the effects of supply voltage variations during cranking, and the immediate effects of the fuel tank being refilled when the engine is stopped.