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Evaporative Leak Check System by Depressurization Method
Technical Paper
2004-01-0143
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Changes to OBDII regulations in North America are requiring more frequent leak checks to the evaporative emissions system. Conventional methods are unable to comply with the required 0.26 performance ratio due to various factors such as unstable tank pressure and fuel evaporation. These strict regulations require an innovative detection device. Utilizing a vacuum pump, a leak check module with high detection frequency, leak diagnostic accuracy, and reliability has been developed. In the present paper, the details of ELCM based on the depressurization method are reported together with the results of study on the pressurization method.
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Citation
Kobayashi, M., Yamada, Y., Kano, M., Nagasaki, K. et al., "Evaporative Leak Check System by Depressurization Method," SAE Technical Paper 2004-01-0143, 2004, https://doi.org/10.4271/2004-01-0143.Also In
References
- Code of Federal Regulation, Title 40,Part86,Sub-part B “Emission Regulations for 1977 and Later Model Year New Light-Duty Vehicles and New Light-Duty Trucks; Test Procedures”