The effects of PGM zoning and washcoat staging have been investigated as a means to lower the cost and simultaneously improve the performance of a lean NOx trap system. It is shown that reverse PGM zo....
Within the framework of the French research program PREDIT, a study was undertaken by ADEME, IFP, LGRE, PSA Peugeot Citroën and Umicore, whose main objective was a better understanding of the NOx stor....
The mechanism for the purging of a lean NOx trap has been investigated. For realistic purge times (e.g., 2 to 5 seconds), the stored NOx species do not decompose simply from equilibrium considerations....
Thermal shock performance parameters to assure Ultra Thin Wall (UTW) substrate durability for close-coupled (CC) converter operating conditions have been defined through testing and FEM modeling. Prop....
Continuous improvement in vehicle emissions is necessary to meet ever tightening regulations. These regulations are advancing in both passenger and light truck vehicle markets, currently at different ....
The paper is aimed at investigating backpressure and backpressure variation of three way catalysts (TWC). Results presented show that backpressure variation is influenced by measurement error, substra....
In conventional gasoline engine vehicles, three-way catalysts are used to simultaneously remove HC, CO and NOx from the exhaust gas. The effectiveness of the catalyst to remove these harmful species d....
Materials with Oxygen Storage Capacity (OSC) are key components in the formulation of Three Way Catalysts (TWC) for more than 2 decades. To get advanced TWC catalysts complying with the coming more se....
We have developed a Pd-intelligent catalyst with a self-regenerative function that is realized by the passage of Pd through consecutive solid solution and segregation states in and out of a perovskite....
A new exhaust system has been developed to cope with post-SULEV (Super Ultra-Low Emissions Vehicle) regulation by newly designed hardware of exhaust system. This paper will describe the various new te....
BMW VALVETRONIC technology is able to maintain the most important measures to reduce emissions. The further optimized charge movement created by VALVETRONIC stabilizes the combustion in the catalyst h....
Global environmental consideration is now one of the essential components in automotive design. This concern needs be addressed not only by aftertreatment systems but also engine control technologies.....
