Development of a High Performance Catalytic Converter for a Turbocharged Gasoline Engine Using Thin Wall Ceramic Technology

1993 ◽  
Author(s):  
Iain Sword ◽  
Geoff Morgan ◽  
Richard O'Sullivan ◽  
Duncan Winterbone ◽  
Minoru Machida
Keyword(s):  
High Performance ◽  
Gasoline Engine ◽  
Catalytic Converter ◽  
Ceramic Technology ◽  
Thin Wall ◽  
Wall Ceramic

Tumble Flow Measurements Using Three Different Methods and Its Effects on Fuel Economy and Emissions

2006 ◽  
Author(s):  
Myoungjin Kim ◽  
Sihun Lee ◽  
Wootae Kim
Keyword(s):  
Fuel Economy ◽  
High Performance ◽  
Gasoline Engine ◽  
Exhaust Emissions ◽  
Combustion Stability ◽  
Lean Burn ◽  
Flow Measurements ◽  
Part Load ◽  
Gasoline Engines ◽  
Dynamometer Test

In-cylinder flows such as tumble and swirl have an important role on the engine combustion efficiencies and emission formations. In particular, the tumble flow, which is dominant in-cylinder flow in current high performance gasoline engines, has an important effect on the fuel consumptions and exhaust emissions under part load conditions. Therefore, it is important to know the effect of the tumble ratio on the part load performance and optimize the tumble ratio of a gasoline engine for better fuel economy and exhaust emissions. First step in optimizing a tumble flow is to measure a tumble ratio accurately. In this research the tumble flow was measured, compared and correlated using three different measurement methods: steady flow rig, 2-Dimensional PIV, and 3-Dimensional PTV. Engine dynamometer test was performed to find out the effect of the tumble ratio on the part load performance. Dynamometer test results of high tumble ratio engine showed faster combustion speed, retarded MBT timing, higher exhaust emissions, and a better lean burn combustion stability. Lean limit of the baseline engine was expanded from A/F=18:1 to A/F=21:1 by increasing a tumble ratio using MTV.

scholarly journals No Catalytic Performance Analysis of Gasoline Engine Tapered Variable Cell Density Carrier Catalytic Converter

2021 ◽  
Author(s):  
Qingsong Zuo ◽  
Xiaomei Yang ◽  
Bin Zhang ◽  
Qingwu Guan ◽  
Zhuang Shen ◽  
...  
Keyword(s):  
Cell Density ◽  
Conversion Rate ◽  
Gasoline Engine ◽  
Catalytic Converter ◽  
Structural Parameters ◽  
Reference Value ◽  
Catalytic Performance ◽  
No Conversion ◽  
Field Uniformity ◽  
Physical And Mathematical Models

Abstract Improving the flow field uniformity of catalytic converter can promote the catalytic conversion of NO to NO2. Firstly, the physical and mathematical models of improved catalytic converter are established, and its accuracy is verified by experiments. Then, the NO catalytic performance of standard and improved catalytic converters is compared, and the influences of structural parameters on its performance are investigated. The results showed that: (1) The gas uniformity, pressure drop and NO conversion rate of the improved catalytic converter are increased by 0.0643, 6.78% and 7.0% respectively. (2) As the cell density combination is 700 cpsi/600 cpsi, NO conversion rate reaches the highest, 73.7%, and the gas uniformity is 0.9821. (3) When the tapered height is 20 mm, NO conversion rate reaches the highest, 72.4%, the gas uniformity is 0.9744. (4) When the high cell density radius is 20 mm, NO conversion rate reaches the highest, 72.1%, the gas uniformity is 0.9783. (5) When the tapered end face radius is 20 mm, NO conversion rate reaches the highest, 72.0%, the gas uniformity is 0.9784. The results will provide a very important reference value for improving NO catalytic and reducing vehicle emission.

Influence of Powder Distribution on the Al2O3 Thin-wall Ceramic Formed by Laser Engineered Net Shaping

2015 ◽  
Vol 42 (1) ◽  
pp. 0103006 ◽  
Author(s):  
马广义 Ma Guangyi ◽  
王江田 Wang Jiangtian ◽  
牛方勇 Niu Fangyong ◽  
孙贝 Sun Bei ◽  
吴东江 Wu Dongjiang
Keyword(s):  
Thin Wall ◽  
Laser Engineered Net Shaping ◽  
Wall Ceramic ◽  
Net Shaping

PHASE EVOLUTION AND MICROWAVE DIELECTRIC PROPERTIES OF (Li0.5Bi0.5)(W1-xMox)O4(0.0 ≤ x ≤ 1.0) CERAMICS WITH ULTRA-LOW SINTERING TEMPERATURES

2012 ◽  
Vol 05 (04) ◽  
pp. 1250042 ◽  
Author(s):  
DI ZHOU ◽  
JING GUO ◽  
XI YAO ◽  
LI-XIA PANG ◽  
ZE-MING QI ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
High Performance ◽  
Microwave Dielectric Properties ◽  
Phase Evolution ◽  
Solid State Reaction Method ◽  
Ceramic Technology ◽  
Microwave Range ◽  
X Ray ◽  
Microwave Dielectric ◽  
C Complex

The ( Li 0.5 Bi 0.5)( W 1-x Mo x) O 4(0.0 ≤ x ≤ 1.0) ceramics were prepared via the solid state reaction method. The sintering temperature decreased almost linearly from 755°C for ( Li 0.5 Bi 0.5) WO 4 to 560°C for ( Li 0.5 Bi 0.5) MoO 4. When the x≤0.3, a wolframite solid solution can be formed. For x = 0.4 and x = 0.6 compositions, both the wolframite and scheelite phases can be formed from the X-ray diffraction analysis, while two different kinds of grains can be revealed from the scanning electron microscopy and energy-dispersive X-ray spectrometer results. High performance of microwave dielectric properties were obtained in the (Li0.5Bi0.5)(W0.6Mo0.4)O4 ceramic sintered at 620°C with a relative permittivity of 31.5, a Qf value of 8500 GHz (at 8.2 GHz), and a temperature coefficient value of +20 ppm/°C. Complex dielectric spectra of pure (Li0.5Bi0.5)WO4 ceramic gained from the infrared spectra were extrapolated down to microwave range, and they were in good agreement with the measured values. The ( Li0.5Bi0.5 )( W 1-x Mo x) O 4(0.0 ≤ x ≤ 1.0) ceramics might be promising for low temperature co-fired ceramic technology.

The Innovative Reinforcement Technology of Thin Wall Ceramic Substrate Having High Coatability

2000 ◽  
Author(s):  
Masakazu Tanaka ◽  
Mamoru Nishimura ◽  
Masakazu Murata ◽  
Keiji Itou
Keyword(s):  
Ceramic Substrate ◽  
Thin Wall ◽  
Wall Ceramic

Acoustic focusing with engineered node locations for high-performance microfluidic particle separation

The Analyst ◽  
2014 ◽  
Vol 139 (5) ◽  
pp. 1192-1200 ◽  
Author(s):  
Erika J. Fong ◽  
Amanda C. Johnston ◽  
Timothy Notton ◽  
Seung-Yong Jung ◽  
Klint A. Rose ◽  
...  
Keyword(s):  
High Throughput ◽  
High Performance ◽  
High Efficiency ◽  
Particle Separation ◽  
Main Channel ◽  
Thin Wall ◽  
Device Design ◽  
Secondary Channel ◽  
New Approach ◽  
Acoustic Focusing

We present a new approach to acoustofluidic device design with a secondary channel separated from the main channel by a thin wall. This allows off-center placement of acoustic nodes, which enables high-efficiency and high-throughput separation of cell-scale objects.

Factors Affecting the Extensional Flow of Crowded Suspensions for the Manufacture of thin Wall Ceramic Bodies

1992 ◽  
Vol 289 ◽  
Author(s):  
James Greener ◽  
Julian R.G. Evans
Keyword(s):  
Extensional Flow ◽  
Thin Wall ◽  
Flow Measurements ◽  
Factors Affecting ◽  
Particulate Suspensions ◽  
Vacuum Forming ◽  
Ceramic Components ◽  
Plastic Forming ◽  
Wall Ceramic ◽  
Ceramic Suspensions

AbstractProcedures for the manufacture of thin wall ceramic components from particulate suspensions using plastic forming methods which employ extensional flows are described. These include vacuum forming, blow moulding and film blowing. In order to understand how to select materials and to adjust the composition of such suspensions, the factors which control suspension rheology are identified. The measurement of extensional viscosity of ceramic suspensions is reported and compared with shear flow measurements.

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