SYSTEMS AND METHODS FOR DEDICATED EGR CYLINDER EXHAUST GAS TEMPERATURE CONTROL

摘要

Systems and methods for increasing EGR gas temperature for an engine that includes at least one dedicated EGR cylinder. The dedicated EGR cylinder may provide exhaust gas to engine cylinders and the exhaust gas does not include exhaust gases from cylinders other than the dedicated EGR cylinder. The dedicated EGR cylinder may allow the engine to operate at higher EGR dilution levels.

主权项

1. A method for an engine, comprising:
recirculating exhaust gas from only a dedicated EGR cylinder to an intake of engine cylinders; increasing EGR temperature in the dedicated EGR cylinder via increasing an air-fuel ratio of the dedicated EGR cylinder in response to EGR cooler condensation; and operating remaining engine cylinders about a stoichiometric air-fuel ratio in response to the EGR cooler condensation.