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Catalytic Converter Development Program for 1998 India Cold Start Emission Standards
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English
Abstract
This paper describes the experience gained during the successful development of a catalytic converter design for an in-line 4 cylinder application to meet the India 1998 cold start emissions standards. The vehicle application considered was an open loop carburetted system that met the 1997 hot start emission standards using a conventional Pt/Rh underbody mounted catalyst. The challenge was to meet the 1998 standards through catalyst changes and/or minor carburettor adjustments, thus providing the customer with the most cost-effective solution. The approach adopted was to use a mathematical computer simulation (MAESTRO™) developed by Delphi, that utilized engine out data obtained from emission testing of the vehicle to simulate proposed solutions. The biggest advantage of this approach was the ability to estimate the impact of system level changes on emissions performance thus enabling a quick optimization of the design variables. This allowed more time and resources for fabrication and validation testing of only the most likely solutions.
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Anand, A., Richmond, R., and Schmidt, W., "Catalytic Converter Development Program for 1998 India Cold Start Emission Standards," SAE Technical Paper 990002, 1999, https://doi.org/10.4271/990002.Also In
References
- Chen D. K.S. Oh S.H. et al A Three-dimensional Model for the Transient Thermal and Conversion Characteristics of Monolithic Catalytic Converters SAE 880282 1988
- Mondt, J. R. A Thermocouple Probe for Measuring Gas Temperature in the Exhaust Takedown 1978
- Blumer T.D. Richmond R.P. Thermal Management of the Front Module of an Automotive Exhaust System for Reduced Cold-Start Emissions 1995 Vehicle Thermal Management Systems Conference Proceedings
- Goulette D. A. Richmond R. P. Thoreson T. Vehicle Emissions from Road Aged Passive Distributed Converter System for ULEV Emissions Regulations SAE, 972848