Results 161 to 170 of about 33,336 (222)

Egr-2 and Egr-3 are negative regulators of T cell activation

Nature Immunology, 2005
T cell receptor engagement in the absence of proper accessory signals leads to T cell anergy. E3 ligases are involved in maintaining the anergic state. However, the specific molecules responsible for the induction of anergy have yet to be elucidated. Using microarray analysis we have identified here early growth response gene 2 (Egr-2) and Egr-3 as key
Meredith, Safford, Samuel, Collins, Michael A, Lutz, Amy, Allen, Ching-Tai, Huang, Jeanne, Kowalski, Amanda, Blackford, Maureen R, Horton, Charles, Drake, Ronald H, Schwartz, Jonathan D, Powell   +10 more
openaire   +2 more sources

EGR System Fouling Control

SAE International Journal of Engines, 2008
<div class="htmlview paragraph">Exhaust gas recirculation (EGR) is effective in reducing engine-out NO_x emissions; however, the EGR system is subject to fouling and corrosion. Fouling is mainly due to particulate buildup on the EGR component (e.g., EGR valve and cooler) surfaces.
Reggie Zhan, Scott T. Eakle, John W. Miller, Joseph W. Anthony   +3 more
openaire   +1 more source

Potential of n-butanol/diesel blends for CI engines under post injection strategy and different EGR rates conditions

, 2020
Blending n-butanol and diesel fuels in combination with a post injection strategy could accomplish the target of ultra-low soot emissions. However, the introduction of n-butanol leads to increased NOX emissions. Exhaust gas recirculation (EGR) technology
Xiaorong Zhou, Weiwei Qian, Mingzhang Pan, Rong Huang, Leilei Xu, Jichong Yin   +5 more
semanticscholar   +1 more source

Experimental and numerical investigation of the effects of low-pressure, high-pressure and internal EGR configurations on the performance, combustion and emission characteristics in a hydrogen-enriched heavy-duty lean-burn natural gas SI engine

Energy Conversion and Management, 2019
In this study, a detailed 1D simulation model of the hydrogen-enriched natural gas SI engine was built according to realistic engine layout in the lab with practical boundary conditions, and validated against the experimental data.
Xiongbo Duan, Yiqun Liu, Jing-ping Liu, Ming-Chia Lai, M. Jansons, Genmiao Guo, Shiheng Zhang, Qijun Tang   +7 more
semanticscholar   +1 more source

Control of backfire and NOx emission reduction in a hydrogen fueled multi-cylinder spark ignition engine using cooled EGR and water injection strategies

International journal of hydrogen energy, 2019
The experimental study was carried out on a constant speed multi-cylinder spark ignition engine fueled with hydrogen. Exhaust gas recirculation (EGR) and water injection techniques were adopted to control combustion anomalies (backfire and knocking) and ...
V. Dhyani, K. Subramanian
semanticscholar   +1 more source

Study of injection pressure couple with EGR on combustion performance and emissions of natural gas-diesel dual-fuel engine

, 2020
Natural gas (NG) dual-fuel engines can attain a similar thermal efficiency as that of diesel engines while achieving lower emissions. However, the trade-off relationship between CH4 and NOX emissions limits the development of dual-fuel (DF) engines.
Yingjie Chen, Zan Zhu, Yajuan Chen, Haozhong Huang, Zhaojun Zhu, Delin Lv, Mingzhang Pan, Xiaoyu Guo   +7 more
semanticscholar   +1 more source

Diesel EGR Cooler Fouling

SAE International Journal of Engines, 2008
<div class="htmlview paragraph">The buildup of deposits in EGR coolers causes significant degradation in heat transfer performance, often on the order of 20-30%. Deposits also increase pressure drop across coolers and thus may degrade engine efficiency under some operating conditions.</div> <div class="htmlview paragraph">It is ...
John Hoard, Mehdi Abarham, Dan Styles, Julia M. Giuliano, C. Scott Sluder, John M. E. Storey   +5 more
openaire   +1 more source

The effects of compression ratio and EGR on the performance and emission characteristics of diesel-biogas dual fuel engine

Applied Thermal Engineering, 2019
In this study, an experimental investigation on diesel-biogas dual fuel (DF) engine is presented based on energy and exergy analyses. The effects of change in compression ratio (CR), exhaust gas recirculation (EGR) and EGR temperature on the performance ...
S. Verma, L. Das, S. Kaushik, S. S. Bhatti   +3 more
semanticscholar   +1 more source

Investigating the influence of oxygenated fuel on particulate size distribution and NOX control in a common-rail diesel engine at rated EGR levels

, 2020
The effect of butanol-diesel blend (B20) and different rates of exhaust gas recirculation (EGR) on particulate matter (PM) characterisation and NOX emissions were investigated in this experimental work.
M. Fayad
semanticscholar   +1 more source

Dedicated EGR Vehicle Demonstration

SAE International Journal of Engines, 2017
<div class="section abstract"><div class="htmlview paragraph">Dedicated EGR (D-EGR) is an EGR strategy that uses in-cylinder reformation to improve fuel economy and reduce emissions. The entire exhaust of a sub-group of power cylinders (dedicated cylinders) is routed directly into the intake.
Dennis Robertson, Christopher Chadwell, Terrence Alger, Jacob Zuehl, Raphael Gukelberger, Bradley Denton, Ian Smith   +6 more
openaire   +1 more source