Method for operating an internal combustion engine operated with a gas as fuel

摘要

A method for operating an internal combustion engine (100), particularly of a motor vehicle, operated with a gas as fuel, a lambda value of an air/fuel mixture being regulated by means of lambda control as a function of a signal from a lambda probe (130), and, when a lean/rich jump is detected by the lambda probe (130), a mixture control factor (GRF) which controls the mixture composition being varied at least for a predeterminable time such that a shift of the lambda air ratio toward rich is caused, is characterized in that the mixture control factor (GRF) is varied in such a way that an additional defined shift of the lambda air ratio toward rich is caused.

主权项

1. A method for operating an internal combustion engine, wherein the internal combustion engine is operated with a gas as fuel and a lambda value of an air-to-fuel mixture is regulated by means of lambda control as a function of a signal from a lambda probe, the method comprising:
detecting, by the lambda probe, a rich-to-lean jump of the lambda value; varying, by a control apparatus, upon detection of the rich-to-lean jump, a mixture control factor, for at least a first predetermined time, to cause a shift of the lambda value toward rich, wherein the mixture control factor sets the air-to-fuel mixture; detecting, by the lambda probe, a lean-to-rich jump of the lambda value; and varying, by the control apparatus, upon detection of the lean-to-rich jump, the mixture control factor to cause an additional defined shift of the lambda value toward rich.