Emission Control and Fuel Economy for Port and Direct Injected SI Engines

10.4271/pt-91 ◽  
2005 ◽  
Keyword(s):  
Fuel Economy ◽  
Emission Control ◽  
Si Engines

Emission Control Catalyst Derived from Mesoporous Molecular Sieves

1996 ◽  
Vol 431 ◽  
Author(s):  
Partha P. Paul ◽  
Michael A. Miller ◽  
Martin J. Heimrich ◽  
Stuart T. Schwab
Keyword(s):  
Catalytic Activity ◽  
Fuel Economy ◽  
Molecular Sieves ◽  
Emission Control ◽  
Mesoporous Molecular Sieves ◽  
Exhaust Gas ◽  
Engine Exhaust ◽  
Combustion Processes ◽  
Mcm 41

AbstractA lean NOx catalyst is needed to control NOx emissions generated by oxygen-rich combustion processes to obtain higher fuel economy. We have developed such a catalyst using modified mesoporous molecular sieves (MCM-41). An iron(II)-complex impregnated MCM-41 has been synthesized which has been further treated with [Pd(NH3)4]Cl2. This treatment resulted in further exchange of Na+ ions of the molecular sieves with Pd(NH3)42+ thus forming Catalyst A. The catalytic activity towards NOx, CO and HC was studied using simulated exhaust gas, as well as engine exhaust gas.

Fuel Vaporization Improves Fuel Economy of Alcohol-Burning SI Engines

1982 ◽  
Author(s):  
H. O. Hardenberg ◽  
A. J. Schaefer ◽  
H. I. Metsch
Keyword(s):  
Fuel Economy ◽  
Fuel Vaporization ◽  
Si Engines

Emission control and fuel economy

1975 ◽  
Vol 9 (9) ◽  
pp. 820-824 ◽  
Author(s):  
Ernest S. Starkman
Keyword(s):  
Fuel Economy ◽  
Emission Control

Variable compression ratio engine: A future power plant for automobiles - an overview

2007 ◽  
Vol 221 (9) ◽  
pp. 1159-1168 ◽  
Author(s):  
Amjad Shaik ◽  
N Shenbaga Vinayaga Moorthi ◽  
R Rudramoorthy
Keyword(s):  
Compression Ratio ◽  
Fuel Economy ◽  
Technology Development ◽  
Connecting Rod ◽  
Variable Compression Ratio ◽  
Chamber Volume ◽  
Consumption Benefit ◽  
Si Engines ◽  
Variable Valve ◽  
Variable Compression

Increasingly stringent emissions and fuel economy standards have long remained a source of challenges for research in automobile engine technology development towards the more thermally efficient and less polluting engine. Spark ignition (SI) engines have lower part-load efficiency when compared with the diesel engines. The greatest opportunity for improving SI engine efficiency is by way of higher compression ratio, variable valve timing, low friction, reducing throttling losses, boosting, and down-sizing. Variable compression ratio (VCR) technology has long been recognized as a method for improving the fuel economy of SI engines. In order to vary the compression ratio, some method of varying the geometric compression ratio through changing the clearance volume is required. There are several ways of doing this; various patents have been filed and designs presented, including modification of the compression ratio by moving the cylinder head, variation of combustion chamber volume using a secondary piston or valve, variation of piston deck height, modification of connecting rod geometry, moving the crankpin within the crankshaft, and moving the crankshaft axis. The potential of these technologies needs to be evaluated by a trade-off between cost and consumption benefit. This paper reviews the geometric approaches and solutions used to achieve VCR, considers the results of prior research, and forecasts what benefits, if any, a VCR would bring to present engine design.

Modelbased Temperature Control for Improved Fuel Economy of SI Engines

2001 ◽  
Vol 34 (1) ◽  
pp. 217-222
Author(s):  
E. Cortona ◽  
C.H. Onder ◽  
L. Guzzella
Keyword(s):  
Temperature Control ◽  
Fuel Economy ◽  
Si Engines
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