Methods and systems for operating an engine

摘要

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, engine operation is adjusted in response to a change in engine operating conditions that result in a fractional amount of cylinder charge comprised of exhaust gas changing by more than a threshold percentage. The approaches describe may improve vehicle drivability and fuel economy.

主权项

1. A method for operating an engine, comprising:
inducting a gas mixture into a cylinder, a fraction of the gas mixture comprised of exhaust gas, at least a portion of the gas mixture participating in combustion in the cylinder; and entering the engine into a fuel cut-out state in response to the fraction of the gas mixture changing by more than a threshold percentage.