نتایج جستجو برای: lean burn

تعداد نتایج: 41655  

Journal: :Journal of critical care 2000
R H Demling D P Orgill

PURPOSE Severe burn injury leads to marked catabolism and decreased lean mass, which can impair healing. Anabolic agents can attenuate net catabolism. Our purpose was to determine whether the testosterone analog, oxandrolone, given during the acute post burn period decreased the degree of nitrogen loss and loss of body weight while also increasing the healing rate of a skin donor site. MATERI...

2008
I. Nova L. Lietti P. Forzatti F. Frola F. Prinetto G. Ghiotti W. S. Epling N. W. Currier

Introduction Lean NOx Traps (LNTs) represent a viable solution for the abatement of NOx emissions from lean–burn engines [1]. Several studies were published on the mechanisms of both the NOx storage [1] and reduction [2], but a complete understanding of these processes has not yet been achieved. We have previously shown that on Pt-Ba/Al2O3 LNT systems the reduction of nitrates by H2 involves a ...

2003
Jing Sun Yong Wha Kim Leyi Wang

Control of aftertreatment systems for lean burn technology engines represents a big challenge, due to the lack of on-board emission measurements and the sensitivity of the hardware components to ageing and sulphur poisoning. In this paper, we consider the control and adaptation of aftertreatment systems involving lean NOx trap (LNT). A phenomenological LNT model is presented to facilitate the m...

2007
Jan Koop Olaf Deutschmann

The removal of nitrogen oxides emitted by diesel and lean burn engines is one of the most important targets in catalytic exhaust aftertreatment research. Besides the selective catalytic reduction (SCR) reaction with ammonia the most promising approach is the NOx Storage and Reduction Catalyst (NSR) which utilizes the nitrogen oxides storage on barium sites to form nitrates during the lean phase...

Journal: :Journal of the Visualization Society of Japan 2005

Journal: :DEStech Transactions on Materials Science and Engineering 2017

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 2000

Journal: :Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 2009

Journal: :International Journal of Automotive Engineering and Technologies 2021

Maximizing the fuel economy while lowering exhaust emissions highly depend on precise air-fuel ratio (AFR) control. The major challenge in control of AFR is time-varying delay, which an inherent reason for performance degradation and instability. For analysis, time delay approximated by Padé approximation, leading to a non-minimum phase system that exhibits difficulty controlling due its zeroes...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 2005

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید