Bombardier Recreational Products Inc.

Bombardier Motor Corporation of America

Dell Francis

Scott A Koerner

Patrick C Tetzlaff

Patrick Robert Taylor

Les Szukala

An arrangement is provided for engine diagnostic via PDA. An engine diagnostic system, realized on a PDA, presents a menu to a user with a plurality of options related to engine diagnostic operations through a user graphical interface. The PDA is in connection with an engine management mechanism of an engine. The user makes a selection of an engine diagnostic operation to be performed with respect to the engine. The engine diagnostic system performs the selected engine diagnostic operation through the engine management mechanism of the engine.

Engine diagnostic via PDA

State-of-the-art fuel injectors can be defined by a third-order polynomial to define their performance curve and to optimize performance of the fuel injected engine. Such systems are preprogrammed to use a set of fixed coefficients when replacing fuel injectors. Therefore, these replacement fuel injectors must be manufactured with very precise tolerances so as to operate efficiently with these fixed coefficients. The present invention includes a method and apparatus that allows the use of production fuel injectors that are more economical since they can be manufactured with wider tolerances. The production fuel injectors are supplied with a computer program and a data file having a set of replacement coefficients that are determined especially for that particular fuel injector. The approach allows the restoration of the existing coefficients if the replacement fuel injector does not solve the service problem experienced by the user of the fuel injected engine. The new, replacement fuel injector, together with its specific coefficients, can then be used in another application.

Growing community of inventors

Bristol, WI, United States of America

Dell Francis