Fca US LLC

Joshua M Burt

Michael J Prucka

A vehicle includes an internal combustion engine having at least one cylinder bank, an exhaust system having a catalyst, and an engine control system with a controller configured to perform an operation to protect the catalyst during a cylinder misfire event. The operation includes monitoring and counting a number of cylinder misfires on each cylinder bank, determining if the cylinder misfire count exceeds a predetermined threshold count, and when the cylinder misfire count exceeds the predetermined threshold count in a particular cylinder bank, subsequently (i) setting a reduced engine torque limit and (ii) operating the particular cylinder bank in a stoichiometric fuel/air ratio, to thereby facilitate preventing excessively high temperatures at the catalyst due to the misfire event.

Catalyst protection during misfire

An apparatus for controlling power for a fuel injector includes a fuel injector configured to inject fuel to a cylinder of an engine and a powertrain control module generating a bypass enable signal or a boost enable based on the engine cranking signal. A bypass voltage circuit is electrically coupled to the fuel injector and is configured to provide a system voltage of a vehicle to the fuel injector during a bypass enable signal. A boost voltage circuit is electrically coupled to the fuel injector and configured to increase a system voltage of a vehicle to a boosted voltage during the boost enable signal, wherein the boosted voltage is higher than the system voltage.

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South Lyon, MI, United States of America

Joshua M Burt