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

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

Advanced Emission and Fuel Economy Concept Using Combined Injection of Gasoline and Hydrogen in SI-Engines

2004 ◽  
Author(s):  
Thorsten Allgeier ◽  
Martin Klenk ◽  
Tilo Landenfeld ◽  
Enrico Conte ◽  
Konstantinos Boulouchos ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Si Engines

Recuperative Throttling of SI Engines for Improved Fuel Economy

2004 ◽  
Author(s):  
Lino Guzzella ◽  
Michael Betschart ◽  
Thomas Fluri ◽  
Roberto De Santis ◽  
Christopher Onder ◽  
...  
Keyword(s):  
Fuel Economy ◽  
Si Engines

Microstructure of an extruded rapidly solidified Al-8Fe-2Mo alloy

1986 ◽  
Vol 44 ◽  
pp. 548-549
Author(s):  
W. T. Donlon ◽  
J. E. Allison ◽  
S. Shinozaki
Keyword(s):  
Electron Microscopy ◽  
Automotive Industry ◽  
Fuel Economy ◽  
High Strength ◽  
Al Alloys ◽  
Light Weight ◽  
Thin Sections ◽  
Strength And Durability ◽  
Rapidly Solidified ◽  
Whitney Aircraft

Light weight materials which possess high strength and durability are being utilized by the automotive industry to increase fuel economy. Rapidly solidified (RS) Al alloys are currently being extensively studied for this purpose. In this investigation the microstructure of an extruded Al-8Fe-2Mo alloy, produced by Pratt & Whitney Aircraft, Goverment Products Div. was examined in a JE0L 2000FX AEM. Both electropolished thin sections, and extraction replicas were examined to characterize this material. The consolidation procedure for producing this material included a 9:1 extrusion at 340°C followed by a 16:1 extrusion at 400°C, utilizing RS powders which have also been characterized utilizing electron microscopy.

The Relation of Locomotive Maintenance to Fuel Economy

1918 ◽  
Vol 86 (2218supp) ◽  
pp. 11-11
Author(s):  
Frank McManamy
Keyword(s):  
Fuel Economy
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