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Posted by: engineering project helper
Created at: Wednesday 16th of January 2013 05:13:05 AM
Last Edited Or Replied at :Wednesday 16th of January 2013 05:13:05 AM
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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 11:01:45 AM
Last Edited Or Replied at :Thursday 08th of November 2012 11:01:45 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 06:40:01 AM
Last Edited Or Replied at :Friday 27th of July 2012 06:40:01 AM
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llowing strokes;
1. Intake or Suction Stroke
2. Compression Stroke
3. Power or Combustion Stroke
4. Exhaust stroke
Four stroke engine can be further divided on the bases of fuel, i.e. Four Stroke Diesel engine and Four Stroke Petrol engine.

Four stroke Petrol engine

The four stroke internal combustion engine which uses petrol as the burning fuel is known as four stroke petrol engine. The fuel actually used in the engine is the mixture of petrol and air (oxygen, used to ignite petrol).


The cycle begins at top dead center (TDC), when the piston is farth..................==> [ Click Here to Read More ]


Posted by: fine project uploader
Created at: Saturday 04th of February 2012 09:18:43 AM
Last Edited Or Replied at :Saturday 04th of February 2012 09:18:43 AM
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l ICE cycle,
 The fuel/air valves open as the piston moves down, which draws air and fuel into
The chamber.
 The valves close as the piston moves back up, putting the air/fuel mixture under
 The mixture is then ignited, causing a small explosion which forces the piston
back down, which turns the crank and provides the torque.
 The exhaust valves open as the piston moves back up once again, pushing the byproducts
of the fuel explosion out of the chamber. This leaves the piston back in
its starting position, ready for another cycle.
This process is repeated thousa..................==> [ Click Here to Read More ]

Page Name: four stroke engine

Posted by: birajdar
Created at: Thursday 21st of October 2010 07:18:24 AM
Last Edited Or Replied at :Monday 03rd of December 2012 06:05:02 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 10:56:29 AM
Last Edited Or Replied at :Monday 04th of October 2010 10:56:29 AM
ENGINES , FOUR STROKE, CONTROLLING , PROBLEM, problem of controlling four stroke engine ppt , the problem of controlling four stroke engines,
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Sándor Körözsi

A reasoned proposal for the modification of the controlling method of four-stroke engines, and motivation of the importance of and the need for such modification

Below, I want to outline the controlling techniques presently applied in operating four-stroke internal combustion engines, together with the enumeration of their dis..................==> [ Click Here to Read More ]


Posted by: project report maker
Created at: Monday 05th of July 2010 05:23:30 PM
Last Edited Or Replied at :Tuesday 09th of April 2013 06:03:03 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 04:59:05 PM
Last Edited Or Replied at :Saturday 20th of September 2008 04:59:05 PM
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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 04:58:04 PM
Last Edited Or Replied at :Friday 27th of July 2012 05:39:10 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 04:56:59 PM
Last Edited Or Replied at :Tuesday 19th of January 2010 01:24:56 PM
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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 04:55:43 PM
Last Edited Or Replied at :Friday 29th of June 2012 08:32:57 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 04:55:16 PM
Last Edited Or Replied at :Saturday 20th of September 2008 04:55:16 PM
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The Valvetronic system is the first variable valve timing system to offer continuously variable timing (on both intake and exhaust camshafts) along with continuously variable intake valve lift, from ~0 to 10 mm, on the intake camshaft only. Valvetronic-equipped engines are unique in that they rely on the amount of valve lift to throttle the engine rather than a butterfly valve in the intake tract. In other words, in normal driving, the 'gas pedal' controls the Valvetronic hardware rather than the throttle plate

First introduced by BMW on the 316ti compact in 2001, Valvetronic has since been..................==> [ Click Here to Read More ]

Page Name: BlueTec

Posted by: computer science crazy
Created at: Saturday 20th of September 2008 04:52:33 PM
Last Edited Or Replied at :Tuesday 27th of July 2010 07:37:32 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 04:52:04 PM
Last Edited Or Replied at :Wednesday 26th of February 2014 08:29:45 PM
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Reliability and risk analysis
Optimisation of Mechanical Systems
Cruise missile technology
Fast breeder reactor technology
Advanced safety features in nuclear reactors
Reusable launch vehicles
MHD submarine
Jetropha based biodiesel
Free Electron Laser
Durability in Design
Failure mode evaluation and criticality analysis
Green fuels
MEMS(Micro Electro Mechanical Systems)
Aircraft Maneuverability
Piston less dual chamber rocket fuel pump
Traction control
Adaptive Cruise Control
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New rolling technique for texturing
Acoustic Parking Systems
Fly..................==> [ 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 03:11:25 PM
Last Edited Or Replied at :Thursday 15th of August 2013 10:03:47 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 05:12:49 PM
Last Edited Or Replied at :Thursday 24th of January 2013 05:26:13 PM
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hat after the combustion process is complete, the resulting exhaust stream contains a considerable amount of free single atoms of oxygen and nitrogen, the result of the heat of combustion splitting the O2 and N2 molecules in the air. These will readily react with each other to create NOx, a pollutant. A catalytic converter in the exhaust system re-combines the NOx back into O2 and N2 in modern vehicles.

A Diesel engine, on the other hand, injects the fuel into the cylinder directly. This has the advantage of avoiding premature spontaneous combustion”a problem known as detonation or pi..................==> [ Click Here to Read More ]

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