Ford Global Technolgoies, LLC

Christopher Weber

Robert Roy Jentz

Michael Igor Kluzner

Robert Baskins

Andrew Paul Bagnasco

Kenneth John Behr

Nelson William Morrow, Jr

Yichao Guo

Tamra Green

C Scott Langley

Systems and methods for operating an engine that includes an oxygen sensor and one or more fuel injectors for each engine cylinder are described. In one example, lines describing a relationship between a fuel mass multiplier and a coefficient of a function describing output of an oxygen sensor to a step change in fuel mass are a basis for determining air-fuel imbalance of engine cylinders.

Methods and system for determining engine air-fuel ratio imbalance

Methods and systems are provided for detecting spark plug fouling and cleaning up fouled spark plug during pre-delivery phase of a vehicle. In one example, a method may include updating a spark plug fouling index saved in the non-volatile memory of the vehicle based on engine operating parameters, and indicating spark plug fouling based on the updated index. The method may further include cleaning the fouled spark plug by driving the vehicle along a planned route.

Method and system for plug fouling monitoring and cleaning

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Plymouth, MI, United States of America

Christopher Weber