Exhaust gas recirculation control systems and methods

摘要

A fuel control system of a vehicle includes an injection control module and a command module. The injection control module determines a first target amount of fuel for a combustion event of an engine. A command module selectively command the injection control module to provide two fuel injections when a torque request decreases. In response to the command, the injection control module: determines second and third target amounts of fuel based on the first target amount; provides a first fuel injection during the combustion event based on the second target amount; and provides a second fuel injection during a compression stroke of the combustion event based on the third target amount.

主权项

1. A fuel control system of a vehicle, comprising:
an injection control module that determines a first target amount of fuel for a combustion event of an engine; and a command module that selectively command the injection control module to provide two fuel injections when a torque request decreases and that determines whether to command the injection control module to provide the two fuel injections based on a difference between an estimated mass fraction of recirculated exhaust gas in a gas charge of the combustion event and a target mass fraction of recirculated exhaust gas for the combustion event, wherein, in response to the command, the injection control module:
determines second and third target amounts of fuel based on the first target amount;provides a first one of the two fuel injections during the combustion event based on the second target amount; andprovides a second one of the two fuel injections during a compression stroke of the combustion event based on the third target amount.