Daimlerchrysler Corporation

Chrysler Group LLC

William E Leisenring

Wei D Wang

Richard K Moote

Chris J Booms

Mark J Poublon

Douglas M Stander

Danny K Schuelke

Jason E Wielenga

Thomas W Stephens

Craig Summers

Kevin Deweerdt

David J Carlson

Vipul Patel

This technology provides methods and systems for catalyst feasibility analysis and the optimal determination of automotive catalyst specifications utilizing, but not limited to, light-off performance, air-to-fuel ratio tolerance, and steady state emissions performance catalyst criteria. This technology additionally provides a catalyst feasibility index algorithm that includes various catalyst criteria inputs and provides for weighting factors to independently value each catalyst input. The technology further provides for the optimal determination of automotive catalyst specifications in order to reduce vehicle toxic exhaust emissions such as hydrocarbons (HC) and oxides of nitrogen (NO).

Method and system for determining the feasibility of an automotive exhaust catalyst

A non-intrusive method and arrangement for detecting the aging of an oxygen sensor, without increasing tailpipe emissions, is provided. The method detects an aging oxygen sensor, located between a motor vehicle engine and a catalytic converter, by sampling a series of oxygen level signals taken over a calibratable time block only when at least one engine operating condition satisfies a predetermined criterion whereunder the method will not intrude upon the engine controller's ability to minimize undesirable exhaust emissions. After a series of signal processing, the samplings are then compared to calibratable thresholds in order to determine the aging degree of the oxygen sensor.

Oxygen sensor monitoring arrangement

Growing community of inventors

Tecumseh, MI, United States of America

William E Leisenring