Method for determining supply period of gaseous fuel into combustion engine during direct supply, involves determining supply period depending on pressure ratio between combustion chamber gas pressure and fuel pressure

摘要

The method involves determining the supply period depending on a pressure ratio between a combustion chamber gas pressure and a fuel pressure. The supply period is corrected by a correction factor during the supply of the gaseous fuel directly into the combustion chamber of a combustion engine. The correction factor is dependent on orifice coefficient. The orifice-coefficient dependent correction factor corrects a crank shaft angle sub-difference, in which a subcritical flow of the gaseous fuel develops. An independent claim is included for a device for determining a supply period of a gaseous fuel into a combustion engine during a direct supply.