Results 271 to 280 of about 11,408 (310)
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Active Plasma Probing for Lean Burn Flame Detection
SAE Technical Paper Series, 2023<div class="section abstract"><div class="htmlview paragraph">Combustion diagnostics of highly diluted mixtures are essential for the estimation of the combustion quality, and control of combustion timing in advanced combustion systems. In this paper, a novel fast response flame detection technique based on active plasma is introduced and ...
Linyan Wang +5 more
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DeNOx catalyst for automotive lean-burn engine
Catalysis Today, 1996Abstract 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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Development of KMC 2.4L Lean Burn Engine
SAE Technical Paper Series, 1995<div class="htmlview paragraph">This paper describes the development process and test results of the lean burn engine. LML (Lean Misfire Limit) extension and NOx emission reduction was realized in combination with the following factors. (1) Installing several types of SCV (Swirl Control Valve) with different section shapes and dividing wall in ...
Chulho Yu +5 more
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Effusion Cooling System Optimization for Modern Lean Burn Combustor
Volume 5B: Heat Transfer, 2016Stricter legislation limits concerning NOx emissions are leading main aero-engine manufacturers to update the architecture of the combustors towards the implementation of lean burn combustion concept. Cooling air availability for the thermal management of combustor liners is significantly reduced, demanding even more effective liner cooling schemes ...
Andreini, Antonio +5 more
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Prechamber for Lean Burn for Low NOx
SAE Technical Paper Series, 1995<div class="htmlview paragraph">To ignite very lean natural gas mixture it is necessary to use prechambers. The extension of lean limit of a combustion system is given by citing an example. The orifice diameter from the prechamber to the main chamber has a strong effect. The magnitude of the effect for one particular example is shown.
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Adaptive intake oxygen estimation in lean-burn engines
2012 American Control Conference (ACC), 2012The oxygen concentration in the intake manifold of a lean-burn engine is a key variable that is directly related to the quality of combustion. In this paper, an adaptive observer is developed to estimate the intake oxygen concentration in the intake manifold of a lean-burn engine using measurements from existing sensors with minimum computational load.
null Jun-Mo Kang +3 more
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Deactivation in Cu-ZSM-5 lean-burn catalysts
Applied Catalysis B: Environmental, 1993Abstract Cu-ZSM-5 catalysts that exhibit fair fresh performance for nitric oxide reduction by hydrocarbons under oxidizing conditions also exhibit facile deactivation. Brief periods of catalytic use at temperatures of 600–800°C result in substantial deactivation. The higher the temperature, the more severe the deactivation.
K.C.C. Kharas, H.J. Robota, D.J. Liu
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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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Formation of formaldehyde in lean-burn gas engines
MTZ worldwide, 2009In recent times stationary gas engines, especially those fuelled with poor gases such as biogas or landfill gas, have shown amounts of formaldehyde (HCHO) emissions exceeding the given limits of the German emission regulation TA Luft. In order to achieve compliance with the emission regulations, research was conducted at the Lehrstuhl fur ...
Markus Bauer, Georg Wachtmeister
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A Lean-Burn, Sub-Compact Natural Gas Vehicle
SAE Technical Paper Series, 1996<div class="htmlview paragraph">This study evaluates a prototype, light-duty natural gas vehicle using lean-burn technology. Emissions and fuel economy for lean-burn operation are compared to that of stoichiometric operation. The vehicle is a sub-compact, 1991 Chevrolet Turbo Sprint. Multi-port natural gas injection was used to fuel the engine at
S Hill +5 more
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