Seminarsonly.com

Custom Search

>>

Are you interested in this topic. Then mail to us immediately to get the full report.

E-mail :- contactv2@gmail.com

______________________________


 

 

 

 

 

 

 

 

 

 

 

Next Generation Engines : Seminar Report and PPT

In this page, you can find Next Generation Engines and want to download the Seminar Report and PPT in PDF and DOC Format, then visit this page. Also you will get free download of Seminar Topics Abstract, Synopsis and Slides or Power point Presentation by exploring more in this page..

>

Definition of Next Generation Engines

Gasoline direct injection (GDI) engine technology has received considerable attention over the last few years as a way to significantly improve fuel efficiency without making a major shift away from conventional internal combustion technology. In many respects, GDI technology represents a further step in the natural evolution of gasoline engine fueling systems. Each step of this evolution, from mechanically based carburation, to throttle body fuel injection, through multi-point and finally sequential multi-point fuel injection, has taken advantage of improvements in fuel injector and electronic control technology to achieve incremental gains in the control of internal combustion engines. Further advancements in these technologies, as well as continuing evolutionary advancements in combustion chamber and intake valve design and combustion chamber flow dynamics, have permitted the production of GDI engines for automotive applications.

GDI technology has potential applications in a wide segment of automotive industry. It is attractive to two stroke engine designer because of the inherent ability of in cylinder injection to eliminate the exhaust of uncombusted fuel during the period of overlap in intake and exhaust valve opening. The greatest fuel efficiency advantages of GDI can be realized in direct injection stratified charge lean combustion applications, significant fuel savings can be achieved even under stochiometric operation. 

Use of gasoline direct injection (GDI) can reduce charge-air temperature while allowing for higher compression ratios.  This has the effect of reducing the potential for detonation yet increasing gasoline engine efficiency. Instead of fuel and air mixing prior to entering the cylinder as with typical fuel injection, GDI uses a high-pressure injector nozzle to spray gasoline directly into the combustion chamber.  An example of a GDI system is shown in Figure.  One advantage of GDI is that as the fuel vaporizes, it absorbs energy from the charge.  This "cooling effect" lowers the temperature of the air in the cylinder, thereby reducing its tendency to detonate.

http://2.bp.blogspot.com/-nPN65bFwg2A/TogaL-SkvlI/AAAAAAAAAKY/cIaWV8kAAuA/s1600/Untitled.png

GDI WITH TURBOCHARGING

In current turbocharged applications, the intake and exhaust valves are never open simultaneously. Unfortunately, lack of  any  valve overlap allows combustion gasses to remain in the cylinder after the exhaust stroke, which is a detriment to the next combustion process and can possibly increase NO X  emissions. In GDI engines, though, the intake charge is air only-not an air-fuel mixture.  This means that both intake and exhaust valves can be open at the end of the exhaust stroke and that fresh air can be used to flush out the cylinder.

Another recent innovation in turbocharger design that can further aid cylinder emptying during the exhaust stroke is the concept of twin-scroll turbine housing.  Twin-scroll turbine housing serves to prevent pressure-wave interaction of the exhaust flows.  Engines with an even number of cylinders, especially four-cylinder engines, frequently have a problem with exhaust pressure-waves from cylinders just beginning the exhaust stroke interacting with other cylinders that are nearing the end of the exhaust stroke. By using typical single-inlet turbine housing, approximately ten percent of the combustion gas remains in the cylinder after each exhaust stroke.  Twin-scroll turbine housing, like that pictured in Figure, creates two separate inlets to the turbine section.  Each inlet combines the exhaust flows from cylinders that are on different strokes in the cycle.  Utilization of twin-scroll turbine housing significantly reduces the pressure-wave interaction between the cylinders, helping empty the cylinders of exhaust gasses more completely.

 

You may also like this : Dyna-cam engine, Apache Helicopter, CAMM Systems, Friction Stir Welding, HEMI engines, Just In Time Manufacturing, Lean manufacturing, Quality improvement tool "poka yoke", MEMS for Space, Personal Protection , Mine Detection Using Radar Bullets, Overall Equipment Effectiveness, Predictive Maintenance using Thermal Imaging, Methanol Fueled Marine Diesel Engine, Quality function deployment, Quasi turbine, Robots In Radioactive Environments, Sidewinder Missile, Smart Materials, Transit Mixer & Concrete Pump, Turbofan Engine, Solar Sails, Ultrasonic Metal Welding, The Hy-Wire Car, Thermal Barrier Coatings, Ultrasonic Techniques for hidden corrosion detection, Solar-powered vehicles , Two Stroke Engine Using Reed Valves, Vacuum Braking System, Variable Valve Timing In I.C. Engines, Space Elevator, Supercavitation, Thermal shock on interfacial adhesion of thermally conditioned, Total Productive Maintenance, Welding Robots , Air powered cars, Biomechatronic Hand , Computer Aided Process Planning , Re-entry of Space Vehicle, Sensotronic Brake Control, Skid Steer Loader and Multiterrain Loader, Space Robotics, Space Shuttles and its Advancements, Continuously variable transmission (CVT),Cryogenic grinding, Design, Analysis, Fabrication And Testing Of A Composite Leaf Spring, F1 Track Design and Safety, Green Engine, Head And Neck Support (HANS), Hydro Drive,Mechanical Seminar Reports, PPT and PDF.

 

<<back


copyright © 2006 V2 Computers E-mail :- contactv2@gmail.com