Detroit Diesel Corporation

Daimler Chrysler Ag

Harald Wedler

Min Sun

Jeffery Scott Hawkins

Mark Allen Zurawski

Frank S Groer

Heather A Staley

Donald E Keski-Hynnila

Reinhard Pfundt

Dennis J Grace

Wolfram Schmid

Kevin Sisken

Matthew Thomas Baird

Amr Radwan

Zornitza Pavlinova Pavlova-MacKinnon

Jason Thomas Barton

Peter Zagone

Zhiping Han

Martin Fritz

Jimmie L Priest, Jr

A method for verifying the functionality of the components for a diesel particulate filter system based upon engine speed, engine torque, inlet and outlet exhaust pressure at the diesel particulate filter. Various sensor signals are compared to calibratable values in memory for a determination whether the diesel particulate filter system is functional.

Method for verifying the functionality of the components of a diesel particulate filter system

In one aspect, the present invention is directed to a method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality. The engine is equipped with an engine control system (ECS) having a memory and in electronic communication with various sensors. The sensors transmit data signals to the ECS indicative of associated engine and vehicle component functionality. The method comprises determining a measured operating condition of a first component from sensor data signals indicative of first component functionality, determining a measured operating condition of a second component from sensor data signals indicative of second component functionality, comparing the measured condition of the first component to the measured operating condition of the second component to determine whether sensor readings from the first component are indicative of a component operating within a normal range but indicative of impending sensor or component failure, logging an indication of an impending sensor or component failure as a fault in MPU memory if it occurs for a predetermined period of time and for more than a predetermined number of times and drive cycles, and activating a warning alert to an operator and initiating remedial actions responsive to the indication of impending component or sensor failure. The data logged includes time of fault, type of fault, number of occurrences of the fault, number of drive cycles where the fault occurred and distance traveled with the fault logged.

Method of verifying component functionality on EGR and air systems

In a method for diagnosis of an exhaust turbocharger for an internal combustion engine, at least one value which characterizes the load on the exhaust turbocharger is determined and compared with a reference value, an event signal being generated in the event of the reference value being exceeded. A wear characteristic number which characterizes the alternating load on the exhaust turbocharger is formed by addition of load signals, in each case one change signal being generated whenever the charger speed of the exhaust turbocharger exceeds a maximum.

Method and appliance for diagnosis of an exhaust turbocharger for an internal combustion engine

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Neuhausen, Germany

Harald Wedler