International Engine Intellectual Property Company, LLC

Ly V Tran

Rogelio Rodriguez

David M Hsia

Richard Ptak

A motor vehicle has wheels on which it travels, a powertrain delivering propulsion torque to at least some of the wheels propel the vehicle, and a service brake system having service brakes. When the service brakes are applied by a service brake actuator, braking torque is applied to at least some wheels. A first device provides data representing a velocity that correlates with velocity of the vehicle, and a second device associated with the actuator provides data that distinguishes between application and non-application of the service brakes by the actuator. A processor monitors data from the first and second devices and processes the monitored data to provide a data output when the first device has disclosed velocity change indicative of the service brakes having been applied without the second device having disclosed that the service brakes have been applied.

System and method for indicating apparent vehicle service brake application without apparent operation of service brack actuator

A motor vehicle engine () has glow plugs () for aiding combustion of fuel in combustion chambers of the engine when the engine is cold and an ignition switch () is operated to crank the engine. An aberration in engine speed () is used to indicate an under- or non-performing glow plug. Data from sources other than the engine speed source (), such as data related to engine fueling, is also processed by a processor () to exclude them as the cause of the aberration.

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Carol Stream, IL, United States of America

Ly V Tran