Results 271 to 280 of about 7,208 (307)

Development of lean NOx catalyst for lean burn gasoline engine

1999
Abstract Lean NOx catalyst for a lean burn gasoline engine was developed. This catalyst could constantly reduce NOx under lean burn driving condition by using hydrocarbon as a reducing agent. This catalyst consists of platinum (Pt), iridium (Ir) and rhodium (Rh) as active metals and H-MFI type zeolite as a support material.
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Homogeneous Chemistry in Lean-Burn Exhaust Mixtures

The Journal of Physical Chemistry A, 1997
The search for catalysts capable of reducing NOx in the exhaust of internal combustion engines operated in the lean-burn mode is presently focused on copper-exchanged zeolites. Despite intensive study, the mechanism of reduction over these catalysts is not well understood. In this study new complications are revealed.
Julian Smith, Jonathan Phillips, Alan Graham, Raymond Steele, Antonio Redondo, James Coons   +5 more
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Stability and Emissions of a Lean Pre-Mixed Combustor with Rich Catalytic/Lean-burn Pilot

International Journal of Chemical Reactor Engineering, 2014
Abstract In this work, a reactor network model was developed to study homogeneous gas-phase methane combustion taking place under typical operating conditions of lean pre-mixed combustors piloted by rich catalytic/lean-burn (RCL) systems. In particular, the thermo-kinetic interaction between the pilot stream (i.e.
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NO2 from Lean-Burn Engines - On its Lower Sensitivity to Leaning than NO

SAE Technical Paper Series, 1995
<div class="htmlview paragraph">Investigations on the NO_x reduction for natural-gas-fueled spark-ignition engines with lean-burn techniques revealed that NO₂ is less sensitive to reduction measures than NO.
Jacob Klimstra, Jan E. Westing
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Studying the Lean Burn Operation in Two-Wheelers to Increase Fuel Efficiency and Investigate the Use of Lean NOx Trap Catalyst (LNT) for Lean Burn System

SAE Technical Paper Series
<div class="section abstract"><div class="htmlview paragraph">This study offers an overview of the impact of lean burn technology in two-wheeler vehicles, specifically concentrating on enhancing the fuel economy and addressing the challenges associated with its adoption.
Karthikeyan Somasundaram, Purushothaman Sivaji, C John Derin, Karwa Vishal, S Manoj Kumar, Rajesh Maynal   +5 more
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The Volkswagen Lean Burn PC-Engine Concept

SAE Technical Paper Series, 1980
<div class="htmlview paragraph">Results from the 1600 cm³ PCI- (PreChamber Injection) Stratified Charge Engine with a divided combustion chamber and fuel injection into the prechamber were described in SAE Paper 750 869. The main objective of continued development on this engine was to meet future emission and fuel economy ...
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Turbulent Burning Velocity of Lean Hydrogen Mixtures

SAE Technical Paper Series, 2003
<div class="section abstract"><div class="htmlview paragraph">The present study is performed to examine experimentally the turbulent burning velocity characteristics of lean hydrogen mixtures with attention to the local burning velocity. The special mixtures, having nearly the same laminar burning velocity with different equivalence ratios ...
Hiroyuki Kido, Masaya Nakahara, Kenshiro Nakashima, Jun-Hyo Kim   +3 more
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DeNOx catalyst for automotive lean-burn engine

Catalysis Today, 1996
Abstract The performance and durability of Cu-ZSM-5 were studied. Cu-ZSM-5 has fairly high NOx reduction activity but its durability is insufficient for practical use. We developed a new deNOx catalyst. In this catalyst, we call NOx storage reduction catalyst (NSR-catalyst), NOx emitted from an engine at lean A F operation is stored and this ...
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Lean Burn Engine Concepts-Emissions and Economy

SAE Technical Paper Series, 1975
<div class="htmlview paragraph">This paper discusses lean burn engine concepts for meeting emission standards features versus the use of an oxidizing catalytic converter for HC and CO control. Purely theoretical considerations indicate that thermal efficiency and therefore fuel economy should be improved by lean operation.
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Increasing the efficiency of lean‐burn automotive engines

International Journal of Environmental Studies, 2006
Transportation is responsible for a large fraction of all of the energy consumed in the world today, and most of this energy is derived from fossil fuels. The combustion of fossil fuels in motor vehicle engines is therefore a major contributor to greenhouse gas emissions and smog production.
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