Browse Publications Technical Papers 2004-01-0146
2004-03-08

Catalytic Converter Hot Vibration Test Methods at The 3M Company 2004-01-0146

While emission standards require greatly reduced levels of certain vehicle emissions, additional regulations require those levels to be met for the useful life of the vehicle, currently specified as 10 years / 100,000 miles for light duty vehicles1. As vehicle manufacturers anticipate requirements of 15 years / 150,000 miles, converter performance and durability must be predicted further into the future.
The realities of the world market and competitive pressures require greatly improved test methods to establish converter robustness well in advance of the start of production. Such methods must enable robustness assessment in a compressed timeframe and at low cost. Often, a converter concept must be evaluated well before the first prototype engine or vehicle is assembled.
To address these needs, a new approach to converter package durability was conceived by an industry group whose members shared the goal of early converter life prediction. Members of that group have taken somewhat different paths in the implementation of that concept. This paper describes the approach and test procedures utilized at The 3M Company.
Initially the focus was placed on duplicating vehicle conditions. While producing excellent test results, the goal of evaluating package durability quickly and at low cost was not met. Further evaluation of internal and customer needs revealed that the required information could be generated much more quickly and much less expensively.
This paper compares and contrasts previous and current test procedures in terms of goals, expense, time, mat stress objectives, thermal exposure, and vibration exposure. Two procedures are described: one for substrate support screening and a second for complete converter testing under quasi-real world conditions. Both procedures yield relative robustness levels among mat mount designs.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Development of a Canning Method for Catalytic Converters using Ultra Thin Wall Substrates

2004-01-0144

View Details

TECHNICAL PAPER

Designed Experiment to Evaluate the Canning Strength of Various High Cell Density / Ultra Thin Wall Ceramic Monoliths

2001-01-3663

View Details

TECHNICAL PAPER

Performance Advantages of Polycrystalline Alumina Fiber Non-intumescent Mat in Catalytic Converters

2005-01-1627

View Details

X