Detroit Diesel Corporation

Lg Chem, Ltd

John Edward Longnecker

Richard Michael Avery, Jr

Leopold Super

Ian Daniel McKenzie

Marleen F Thompson

Dennis Michael Letang

Tomislav Ivo Golub

Brian Andrew Lewallen

Thomas Diefenbaker

Richard Avery

Donald Michael McDonald

Jeffrey John West

James A Gray

David Lawrence Hasfjord

A method for generating diagnostic test files associated with a battery pack is provided. The method includes providing a diagnostic test data table having a plurality of records. A first record is associated with a first diagnostic test. The first record has a first parameter identifier and a first value. The method further includes generating a diagnostic test parameter configuration file having a data structure associated with the first diagnostic test by accessing the diagnostic test data table. The data structure has a first parameter variable that is set equal to the first value. The method further includes generating a diagnostic test software source code file based on the diagnostic test parameter configuration file utilizing a kernel translator program.

System and method for generating diagnostic test files associated with a battery pack

A real-time maintenance alert system and method for use in a heavy-duty truck having an engine controller with memory are provided. The system includes a sensor operative to indicate an engine condition from the group consisting of: oil filter restriction, air filter restriction, fuel filter restriction, oil level, and coolant reserve tank fluid level. Control logic at the engine controller processes the sensor signal to determine a real-time fault condition, when appropriate.

Maintenance alert system for heavy-duty trucks

A vehicle engine control having an automatic start and stop feature for idling the engine to maintain the battery charge includes adjustment for the battery voltage threshold at which the engine is started to recharge the battery. Preferably, the adjustment results from use of an ambient air temperature sensor and a look up table in the control that varies the threshold based on a predetermined relationship between battery voltage and ambient air temperature.

Battery voltage threshold adjustment for automatic start and stop system

A method and system for controlling engine temperature by derating torque output of the engine. The method and system operate in cooperation with an electronic control module which is programmable for controlling temperature in the engine by derating maximum engine torque output based on an engine temperature rate of change. This permits the derating to be finely tuned to maximize available torque.

Method and system for controlling engine temperature by engine derating

A method for controlling an internal combustion engine having a variable geometry turbocharger (VGT) and an exhaust gas recirculation (EGR) system in the face of sensor failures and mechanical faults includes generating accurate substitute values for use by the engine control logic when EGR and VGT system-related sensors are diagnosed as having failed during operation, and maintaining controlled performance of the VGT system in the face of sensor failures or mechanical faults associated with the EGR or VGT system.

Method for responding to sensor failures on EGR/VGT engines

A method and system for indirectly estimating ambient air temperature. The ambient air temperature is estimated based on filtering a temperature input from a turbocharger air inlet sensor. The filtering includes compensating for engine compartment temperature variations which vary relative to the actual ambient temperature.

Method and system for indirectly estimating ambient air temperature

A method for controlling condensation in an engine. A set of signals indicative of an intake manifold temperature, intake manifold pressure, intake air temperature, intake air humidity, engine speed, and exhaust gas mask flow rate is provided. A critical value that indicates that condensation could occur is calculated. The critical value is compared to a predetermined threshold value or range. An exhaust gas recirculation valve is closed if the critical value exceeds the predetermined threshold value or range. The exhaust gas recirculation valve is opened if the predetermined threshold value or range is not exceeded.

Method for controlling condensate formation in an engine system

A method of acquiring population data from engine control modules provided with a memory for storing data relating to parameters of engine operation. The method includes the steps of downloading stored data from a plurality of engine control modules when the engine control modules are reprogrammed. A set of population data is developed and communicated to a central database. The population data is statistically analyzed when a statistically significant portion of the population is obtained. The statistical analysis of the population data is then used to make engine design modifications, provide warranty problem analysis, and analysis of optional feature acceptance.

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Livonia, MI, United States of America

John Edward Longnecker