MULTI-FUEL ENGINE SYSTEM

摘要

Various methods and systems are provided for an engine capable of receiving liquid and gaseous fuel. In one example, cylinder misfire may be identified based on a misfire monitor. The misfire monitor may detect misfire based on signals from a crankshaft sensor. STARTV/-400 D ET ER-M IN E OPFE RAT IN G P A RAM YIERS CONDITIONS FOR N INJECTOR TUNINGC N M ET? OPERATE ALL CYLINDERS WITH SUABSTITUT ION RATIO OF ZERO 4 r08 OPERATE ALL CYLINDERS WITH PREDETERMINED SAFE SUBSTITUTION RATIO (E.G., 80%) INITIATE MISFIRE MONITOR (SEE FIG. 5) RAMP DOWN OPENING DURATION OF INJECTOR OF FIRST CYLINDER ISFIRE DETECTED? 1/ YES r416 RAMP UP OPENING DURATION OF INJECTOR OF FIRST CYLINDER STORE DURATION OF INJECTOR OF FIRST CYLINDER AT WHICH MISFIRE REPEAT FOR REMAINING