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Posted by: engineering project helper
Created at: Tuesday 15th of January 2013 11:13:05 PM
Last Edited Or Replied at :Tuesday 15th of January 2013 11:13:05 PM
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he charge is relatively low. If the intake were to remain open much beyond BDC, the up moving piston would force the charge already in the cylinder back in the intake manifold causing a significant reduction in volumetric efficiency. Hence the intake valve is closed relatively early after BDC for a slow speed engine.
•In low speed engines the intake valve closes 60 after BDC.


•The exhaust valve is set to open 25 before BDC in low speed engines and 55 before BDC in high speed engines.
•If the exhaust valve did not open until BDC, the pressure in the ..................==> [ Click Here to Read More ]

Page Name: Two Stroke engines Four stroke engines ppt

Posted by: engineering project helper
Created at: Thursday 08th of November 2012 05:01:45 AM
Last Edited Or Replied at :Thursday 08th of November 2012 05:01:45 AM
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he engine is reciprocating, this means that the piston must move up and down the cylinder, and therefore the crankshaft must revolve once. The air and fuel(Petrol or CNG) are mixed before compression.

Four Stroke Petrol Engines

The four strokes refer to intake, compression, combustion (power), and exhaust strokes that occur during two crankshaft rotations to complete the processes needed to convert the energy in the fuel into work.

Working of Four Stroke Petrol Engines

Intake Stroke

On the intake or induction stroke of the piston , the piston descends from ..................==> [ Click Here to Read More ]

Page Name: ENGINE ppt

Posted by: project source code cheker
Created at: Friday 27th of July 2012 01:40:01 AM
Last Edited Or Replied at :Friday 27th of July 2012 01:40:01 AM
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more preferred than Two stroke engines.


A stroke is a single action of certain engines, or A Stroke is a half revolution of an engine during which the piston travels from one extreme of its range to the other.


Four Stroke engine

An internal combustion engine (type of engine in which burning of fuel takes place within the engine)in which the entire engine cycle is completed in four piston strokes. In this type of engine with a single intake of fuel the engine can run four strokes . Four stroke engine includes the fo..................==> [ Click Here to Read More ]


Posted by: fine project uploader
Created at: Saturday 04th of February 2012 03:18:43 AM
Last Edited Or Replied at :Saturday 04th of February 2012 03:18:43 AM
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This is why steam power is so
The Six stroke Beare Head simply replaces the conventional Four Stroke Engines
Cylinder Head. The manufacturers Four Stroke bottom end remains unchanged. The
Beare Head utilizes an overhead short stroke Crankshaft and Piston arrangement which
opens and closes Inlet and Exhaust Ports leading through the Upper Cylinder Liner. The
Beare Head Technology can be fitted to new production engines or retro-fitted via
aftermarket replacement. The technology combines a four stroke engine bottom end with
an oppo..................==> [ Click Here to Read More ]

Page Name: four stroke engine

Posted by: birajdar
Created at: Thursday 21st of October 2010 02:18:24 AM
Last Edited Or Replied at :Monday 03rd of December 2012 12:05:02 AM
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Need seminars on four stroke engine..................==> [ Click Here to Read More ]


Posted by: seminar topic helper
Created at: Monday 04th of October 2010 05:56:29 AM
Last Edited Or Replied at :Monday 04th of October 2010 05:56:29 AM
ENGINES , FOUR STROKE, CONTROLLING , PROBLEM, problem of controlling four stroke engine ppt , the problem of controlling four stroke engines,
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Prepared by:
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Posted by: project report maker
Created at: Monday 05th of July 2010 12:23:30 PM
Last Edited Or Replied at :Tuesday 09th of April 2013 01:03:03 AM
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Design and analysis of piston 4s S.I engine.

The projects DESIGN AND ANALYSIS OF 4-STROKE S.I. ENGINE PISTON is about designing the piston according to the forces acting on it from the gases, which are released during the combustion.
The piston head acts as a particular case and hence the piston is analyzed for the stresses developed due to the conditions.
At first, the piston is designed according to the specifications. After the designing, the model is subjected to certain conditions. According to the conditions we have checked the stresses acting on it and checked the ..................==> [ Click Here to Read More ]

Page Name: VVT-i

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:59:05 AM
Last Edited Or Replied at :Saturday 20th of September 2008 11:59:05 AM
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exhaust camshafts) was first introduced in the RS200 Altezza's 3S-GE engine. Dual VVT-i is also found in Toyota's new generation V6 engine, the 3.5L 2GR-FE V6. This engine can be found in the Avalon, RAV4, and Camry in the US, the Aurion in Australia, and various models in Japan, including the Estima. Other Dual VVT-i engines will be seen in upcoming Toyota models, including a new 4 cylinder Dual VVT-i engine for the new generation 2007/2008 Corolla. Another notable implementation of the Dual VVT-i is the 2GR-FSE D-4S engine of the Lexus GS450h. By adjusting the valve timing, engine start and..................==> [ Click Here to Read More ]

Page Name: gate valve

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:58:04 AM
Last Edited Or Replied at :Friday 27th of July 2012 12:39:10 PM
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g stem. Rising stems provide a visual indication of valve position. Nonrising stems are used where vertical space is limited or underground.

Bonnets provide leakproof closure for the valve body. Gate valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger valves and higher pressure applications.

Another type of bonnet construction in a gate valve is pressure seal..................==> [ Click Here to Read More ]

Page Name: VANOS Variable Nockenwellen Steuerung

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:56:59 AM
Last Edited Or Replied at :Tuesday 19th of January 2010 07:24:56 AM
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VANOS (Variable Nockenwellen Steuerung) is an automobile variable valve timing technology developed by BMW in close collaboration with Continental Teves. VANOS varies the duration of the intake valves by moving the position of the camshafts in relation to the drive gear. This movement varies from 6degrees of advanced to 6degrees of retarded camshaft timing. BMW recently began offering 'double' VANOS, which operates on the exhaust camshaft as well, on a number of its cars...................==> [ Click Here to Read More ]

Page Name: Gasoline direct injection or GDI

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:55:43 AM
Last Edited Or Replied at :Friday 29th of June 2012 03:32:57 AM
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Gasoline direct injection or GDI is a variant of fuel injection employed in modern four stroke petrol engines. The gasoline or biobutanol is injected right into the combustion chamber of each cylinder, as opposed to conventional multi point fuel injection that happens in the intake manifold.

GDI enables stratified charge (ultra lean burn) combustion for improved fuel efficiency and emission levels at low load. Further improving efficiency and high-load output-power, the engine power is governed by modulating fuel injection, like a diesel engine; as opposed to restricting intake airflow, lik..................==> [ Click Here to Read More ]

Page Name: Valvetronic

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:55:16 AM
Last Edited Or Replied at :Saturday 20th of September 2008 11:55:16 AM
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added to many of BMW's engines. The Valvetronic system is coupled with BMW's proven double-VANOS, to further enhance both power and efficiency across the engine speed range. Valvetronic will not be coupled to BMW's N53 and N54, 'High Precision Injection' (gasoline direct injection) technology due to lack of room in the cylinder head.

Cylinder heads with Valvetronic use an extra set of rocker arms, called intermediate arms (lift scaler), positioned between the valve stem and the camshaft. These intermediate arms are able to pivot on a central point, by means of an extra, electronicly actuat..................==> [ Click Here to Read More ]

Page Name: BlueTec

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:52:33 AM
Last Edited Or Replied at :Tuesday 27th of July 2010 02:37:32 AM
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BlueTec is DaimlerChrysler's name for its two nitrogen oxide (NOx) reducing systems, for use in their Diesel automobile engines. One is a urea catalyst called AdBlue, the other is called DeNOx and uses an oxidising catalytic converter and particular filter combined with other NOx introduced the systems in the reducing systems. Both systems were designed to slash emissions further than ever before. Mercedes-BenzE-Class (using the 'DeNOx' system) and GL-Class (using 'AdBlue') at the 2006 North American International Auto Show as the E 320 and GL 320 Bluetec. This system makes these vehicles 45-s..................==> [ Click Here to Read More ]

Page Name: List of mechanical Seminar topics4

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:52:04 AM
Last Edited Or Replied at :Wednesday 26th of February 2014 02:29:45 PM
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wheel Batteries
Highly Productive And Reconfigurable Manufacturing System, (Hiparms)
Hydrogen Car
Active Control of Near-Wall Turbulent Flow
Power frequency magnetic fields
Multi Valve Engine
Power System Contingencies
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Electric Automobiles
Modern Air Pollution Control Technologies
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Explosive Welding
O..................==> [ Click Here to Read More ]

Page Name: 10 tips to take a seminar

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 10:11:25 AM
Last Edited Or Replied at :Thursday 15th of August 2013 05:03:47 AM
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A speech needs time to grow. Prepare for weeks, sleep on it, dream about it and let your ideas sink into your subconscious. Ask yourself questions, write down your thoughts, and keep adding new ideas. As you prepare every speech ask yourself the following questions.

In one concise sentence, what is the purpose of this speech?
1) Who is the audience? What is their main interest in this topic?
2) What do I really know and believe about this topic as it relates to this audience?
3) What additional research can I do?
4) What are the main points of this presentation?
5) What supporting..................==> [ Click Here to Read More ]

Page Name: stratified charge engine

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:12:49 PM
Last Edited Or Replied at :Thursday 24th of January 2013 11:26:13 AM
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The stratified charge engine is a type of internal-combustion engine, similar in some ways to the Diesel cycle, but running on normal gasoline. The name refers to the layering of fuel/air mixture, the charge inside the cylinder.

In a traditional Otto cycle engine the fuel and air are mixed outside the cylinder and are drawn into it during the intake stroke. The air/fuel ratio is kept very close to stoichiometric, which is defined as the exact amount of air necessary for a complete combustion of the fuel. This mixture is easily ignited and burns smoothly.

The problem with this design is t..................==> [ Click Here to Read More ]

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