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Thermal Shock Resistance of Oval Monolithic Heavy Duty Truck Converters
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English
Abstract
The long term durability of a heavy duty gasoline truck converter is addressed by examining thermal stresses due to radial temperature gradients under three different driving schedules. The pertinent physical properties of a catalyzed cordierite ceramic converter, with triangular cell structure, are first measured as function of temperature. These are followed by thermal mapping of mid-bed temperatures with the aid of thermocouples under various driving cycles on the truck dynamometer. Both the physical properties and the temperature distribution are then used as input parameters in the finite element thermal stress model to compute stresses in the oval converter. A comparison of thermal stresses with the high temperature strength of the mounted converter shows that the brittle fracture of a honeycomb ceramic monolith can be minimized by reducing the temperature gradient and increasing the mounting pressure via the use of a thick, high density, intumescent mat between the monolith and can.
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Authors
- Suresh T. Gulati - R. D & E Labs Corning Glass Works Corning, NY
- Michael J. Brady - Advanced Engine Systems Dev. Chrysler Corp. Highland Park, MI
- Philip J. Willson - Advanced Engine Systems Dev. Chrysler Corp. Highland Park, MI
- Marshall C. Yee - Advanced Engine Systems Dev. Chrysler Corp. Highland Park, MI
Citation
Gulati, S., Brady, M., Willson, P., and Yee, M., "Thermal Shock Resistance of Oval Monolithic Heavy Duty Truck Converters," SAE Technical Paper 880101, 1988, https://doi.org/10.4271/880101.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 |
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References
- Gulati S. T. Merry R. P. “Design Considerations for Mounting Material for Ceramic Wall-Flow Diesel Filters” SAE Paper No. 840074 February 1984
- Gulati S. T. “Long-Term Durability of Ceramic Honeycombs for Automotive Emissions Control” SAE Paper No. 850130 February 1985
- Gulati S. T. “Effects of Cell Geometry on Thermal Shock Resistance of Catalytic Monoliths” SAE Paper No. 750171 February 1975
- Gulati S. T. “Thermal Stresses in Ceramic Wall Flow Diesel Filters” SAE Paper No. 830079 February 1983
- Helfinstine J. D. Gulati S. T. “High Temperature Fatigue in Ceramic Honeycomb Catalyst Supports” SAE Paper No. 852100 October 1985
- Gulati S. T. Pujari V. K. “Mechanical Integrity of Ceramic Monolithic Converters” SAE Paper No. 811324 November 1981
- ANSYS Swanson Systems Elizabeth, Pa