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An Engine Coolant Temperature Model and Application for Cooling System Diagnosis
Technical Paper
2000-01-0939
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
A coolant temperature model of an internal combustion engine has been formulated to meet the new On-Board Diagnostics II (OBD II) requirement for coolant temperature rationality. The model utilizes information available within the production Engine Control Module (ECM). The temperature prediction capability has been tested for various “real-world” driving conditions and cycles along with regulated drive cycles. The model can be calibrated to find the appropriate timing for initiation of a diagnostic algorithm for engine cooling system and Coolant Temperature Sensor (CTS) faults. A diagnostic scheme has been developed to detect and isolate various types of cooling system failures using engine soak time information available from a low power timer in the ECM. This model-based fault detection scheme will meet the new California Air Resource Board (CARB) regulations for the “high-sided” cooling system rationality and allow more accurate and timely repair of system faults at automotive service centers.
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Authors
Topic
Citation
Yoo, I., Simpson, K., Bell, M., and Majkowski, S., "An Engine Coolant Temperature Model and Application for Cooling System Diagnosis," SAE Technical Paper 2000-01-0939, 2000, https://doi.org/10.4271/2000-01-0939.Also In
Electronic Engine Controls 2000: Modeling, Neural Networks, Obd, and Sensors
Number: SP-1501; Published: 2000-03-06
Number: SP-1501; Published: 2000-03-06
References
- California Air Resources Board “On-Board Diagnostic II Compliance Guidelines” 1998
- Corbel Jean-Claude “An Original Simulation Method for Car Engine Cooling Systems: A Modular System” SAE Technical Paper Series 870713
- Ngy Srun AP “A Simple Engine Cooling System Simulation Model” SAE Technical Paper Series 1999-01-0237 1999
- Fellague Kader A. Hu S. Huey Willoughby Donald A. “Determination of the Effects of Inlet Air Velocity and Temperature Distributions on the Performance of an Automotive Radiator” SAE Technical Paper Series 940771
- Chiang Edward C. Huang George P.C. Chang Zintal Johnson John H. “A One Dimensional Transient Compressible Flow Model for Cooling Air Flow Rate Computation” SAE Technical Paper Series 900721
- Heywood J.B. Internal Combustion Engine Fundamentals McGraw-Hill Book Company New York 1988
- Incropera Frank P. Dewitt David P. Introduction to Heat Transfer John Wiley & Sons Inc. New York 1985