abstract
An opposed-piston hydraulic free piston engine operating with homogenous charge compression ignition (HCCI) combustion, has been proposed by State Key Laboratory of Engines as a means of significantly improving the IC engine’s cycle thermal efficiency and lowering exhaust emissions. Single and multi-zone Chemkin model with detailed chemical kinetics, and unique piston dynamics extracted from one dimensional gas dynamic model, have been used to analyze the combustion characteristics and engine performance. Intake heating, va ....etc

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The History and State of the Art of
Variable-Speed wind Turbine
Technology

ABSTRACT
Early wind turbines used for performing mechanical work (pumping, grinding and cutting) optimized aerodynamics by being allowed to run at variable speed. Some of the earliest DC electric wind turbines were allowed to run at variable speed. With the advent of gridconnected AC turbines, rotational speeds were limited in order to control the wind turbine AC frequency output to equal the grid frequency. With the advent of se ....etc

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History of 64-bit Computing: AMD64 and Intel Itanium Processors
64-bit History
• “640K ought to be enough for anybody” – Bill Gates
• 64-bit twice as fast as 32-bits?
• Benefits of 64-bit technology
• Applications of 64-bit technology
AMD64 Outline
• AMD Athlon 64 Specifications
• Operating Modes
• Register overview
• DDR controller and Hypertransport
AMD Athlon 64 Specifications
Infrastructure Socket 754
Number of Transistors 105.9 million
64-bit Instruction Set ....etc

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This article is presented by:
Sudhir Kumar Routray
The University of Sheffield
History of Electronics

Abstract
In this paper the history of electronics has been represented in a chronological order along with the discoverer/inventor, who actually is responsible for that. The effects of electronics on the contemporary society are very significant and without the study of the effects the history is incomplete. Thus the effects on the economy, computing and the society a ....etc

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HCCI PROJECT

NAME : REVATHI
WANT PROJECT ON HCCI ....etc

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History of Polymer and Plastics

History of Plastics and Polymers

Plastics are polymers. What is a polymer? The most simple definition of a polymer is something made of many units. Think of a polymer as a chain. Each page link of the chain is the mer or basic unit that is made of carbon, hydrogen, oxygen, and/or silicon. To make the chain, many links or mers are hooked or polymerized together. Polymerization can be demonstrated by linking strips of construction paper together to make paper garlands or ....etc

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EFFECTS OF KEY FACTORS ON THE ENGINE COMBUSTION MODE SWITCHING BETWEEN HCCI AND SI
INTRODUCTION
 HCCI IS A PROMISING ENGINE COMBUSTION CONCEPT
 ADVANTAGES OF HIGH FUEL ECONOMY AND ULTRA LOW NOx EMISSIONS
 LIMITED APPLICATION-DIFFICULTY IN CONTROLLING AUTO-IGNITION
 SOLUTION:A HYBRID COMBUSTION SYSTEM IN GASOLINE DIRECT INJECTION ENGINES
HYBRID COMBUSTION SYSTEM
 COMBINATION OF SI AND HCCI MODE IN DIFFERENT OPERATING REGIONS
 HCCI MODE IN MIDDLE/LOW LOADS
 SI MODE IN HIGH SPEED/ ....etc

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ME Engines “ the New Generation of Diesel Engines

INTRODUCTION

The introduction of the electronically controlled camshaft-less low speed diesel engines, which is now gaining momentum, is a milestone in diesel technology that deserves a place in history like Rudolf Dieselâ„¢s first engine in Augsburg, the 1912 motor vessel Selandia, the introduction of turbocharging on two-stroke diesels in 1954, and the first SCR (Selective Catalytic NOx Reduction) systems on ships in 1989. This paper will outline how MA ....etc

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Progress and Recent Trends in Homogeneous Charge CompressionIgnition (HCCI) Engines
What Is HCCI?
An HCCI engine is a mix of both conventional spark-ignition and diesel compression ignition technology.
HCCI is characterized by the fact that the fuel and air are mixed before combustion starts and the mixture auto-ignites as a result of the temperature increase in the compression stroke.
The resulting spontaneous burn produces a flameless energy release in a large zone almost simultaneously -- very different th ....etc

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Abstract
Homogeneous charge compression ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. Homogeneous charge compression ignition (HCCI) engines have
the potential for high efficiencies and low pollutant emissions.By comparison with spark ignition (SI) engines, for example,HCCI engines can yield a 15-20% increase in fuel economy while emitting lower levels of oxides of nitrogen (NOx).HCCI engines can also achieve thermal eff ....etc

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