Ford Global Technolgoies, LLC

William P Boone

Richard E Soltis

Brien Lloyd Fulton

Christian Thomas Goralski, Jr

Hassene Jammoussi

John Erik Mikael Hellstrom

John Paul Bogema

Carlos Armesto

Ace Koua Kue

Yun Xing

Dennis Blanchard

Lohpartap Ahluwalia

Alex John William Michael Howard

A method for determining the presence of water and diesel exhaust fluid mixed with diesel fuel is disclosed. In one example, output pressure of a fuel pump may be indicative of the presence or absence of water in diesel fuel. The presence or absence of water in fuel may be evaluated in response to filling a fuel tank.

Method and system for water in fuel prognostic monitor

Fuel gelling determination methods and systems are provided for identifying and displaying to a vehicle operator a message conveying that the conditions are suitable for the formation of a fuel gel. In one particular example, at a fuel refill event the average ambient air temperature is calculated over the last fifty miles and used to characterize the grade of fuel as a summer or winter grade of fuel. Then, when the ambient temperature next drops near the cloud point of a summer fuel grade while driving, a message is displayed to a vehicle operator indicating that the conditions are suitable for fuel gelling to occur.

Diesel fuel gelling determination method

An on-board diagnostic system and method for directly monitoring the efficiency of a catalyst having negligible oxygen storage capacity is provided. The monitoring system includes an oxygen sensor mounted at a first end of the conditioning catalyst, and an exhaust gas catalyst bypass. The oxygen sensor includes a first side and a second side. The first side detects oxygen levels in the exhaust gas at or near the first end of the catalyst and the second side detects oxygen levels at or near the second end of the catalyst. The oxygen sensor simultaneously compares exhaust gas from the first end of the catalyst to the exhaust gases from the second end of the catalyst. The oxygen sensor produces a voltage signal which is proportional to the difference in oxygen levels between the upstream gases and the downstream gases. The method of the present invention includes providing an oxygen sensor and an exhaust gas catalyst bypass; transferring exhaust gas via the exhaust gas catalyst bypass to a second side of the oxygen sensor; simultaneously detecting oxygen levels in the exhaust gas at the first side and the second side of the oxygen sensor; and producing a voltage which is directly proportional to the amount of oxygen converted over the catalyst.

Method and system for directly monitoring the efficiency of a conditioning catalyst having negligible oxygen storage capacity

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Dearborn, MI, United States of America

William P Boone