Ford Global Technolgoies, LLC

Joseph Goode

Kirk Andrew Parrish

Peter Mitchell Lyon

Shikui K Chen

Norman Hiam Opolsky

Sanket Anil Gujarathi

Jeffrey Malcolm Travis

Brien Lloyd Fulton

John Paul Bogema

Frank M Korpics

Aaron John Oakley

William Clifford Brown

Nicholas Sovis

Nanci Ray

Dayton Brenner

Nicholas John Vella

Methods and systems are provided for identifying when an exhaust valve of an engine cylinder is not functioning as desired while the engine is being operated to raise a temperature of an exhaust system emissions control device, and in turn taking mitigating action. Thus, in one example a method comprises adjusting an amount of fuel that is provided to each of a plurality of cylinders of an engine during an exhaust stroke of the engine in response to an indication of degraded combustion stemming from a cylinder of the engine. In this way, the engine may continue to be operated to raise the temperature of the exhaust system emissions control device, while mitigating the issue of the degraded combustion.

Systems and methods for reducing exhaust valve degradation

Methods and systems are provided for regenerating an aftertreatment device of a vehicle. In one example, a method may include adjusting conditions of the regeneration in response to a stickiness of the exhaust valve. Adjusting conditions may include adjusting an air/fuel ratio and/or a post-injection amount.

Methods and systems for regeneration of an exhaust aftertreatment device

Methods and systems for operating an engine to provide small amounts of energy to heat an aftertreatment device are described. In one example, fewer than the actual total number of engine cylinders are supplied with late post fuel injections (LPI) to heat an aftertreatment device without heating the aftertreatment device more than is desired. The engines fuel injectors may be operated at minimum fuel pulse widths to reduce fuel consumption.

System and method generating an exotherm in an exhaust system

Various systems and methods are described for an engine system with an exhaust gas treatment system including a particulate filter. In one example method, accumulated hydrocarbons are removed from the exhaust gas treatment system by increasing an exhaust gas temperature to a first temperature responsive to a particulate filter regeneration request during extended cold idle operation. After a predetermined duration, the exhaust gas temperature is increased to a second, higher temperature to regenerate the particulate filter.

Methods and systems for an exhaust gas treatment system

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Northville, MI, United States of America

Joseph Goode