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The Development and Implementation of an Engine Off Natural Vacuum Test for Diagnosing Small Leaks in Evaporative Emissions Systems
Technical Paper
2003-01-0719
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper discusses an approach to detecting small leaks in an automobile's evaporative emissions systems that is a technique based upon ideal gas laws. It does this by monitoring pressure in the system while the vehicle's engine is off. This low cost solution can be easily implemented on General Motors vehicles using existing components. The topics covered in this paper include details on the background of the problem and the technique, the underlying thermodynamics of the technique, a description of the algorithm, testing and data collection considerations.
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Citation
DeRonne, M., Labus, G., Lehner, C., Gonsiorowski, M. et al., "The Development and Implementation of an Engine Off Natural Vacuum Test for Diagnosing Small Leaks in Evaporative Emissions Systems," SAE Technical Paper 2003-01-0719, 2003, https://doi.org/10.4271/2003-01-0719.Also In
References
- Perry, P.D. Delaire, J.P. “Development and Benchmarking of Leak Detection Methods for Automobile Evaporation Control Systems to Meet OBDII Emission Requirements,” SAE paper No. 980043 Feb. 1998
- Majkowski S.F. et al. “Development and Validation of a 0.020″ Evaporative Leak Diagnostic System Utilizing Vacuum Decay Methods,” SAE paper No. 1999-01-0861 March 1999
- Reddy, S.R. “System and Method for Detecting Leaks in a Vapor Handling System,” Nov. 1993
- Reddy, S.R. et al. “Leak Detection for a Vapor Handling System,” Nov. 2001