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Tuesday, 12 August 2014
Friday, 16 May 2014
What is Detonation in Engine?
Detonation is the spontaneous combustion of the end-gas (remaining fuel/air mixture) in the chamber. It always occurs after normal combustion is initiated by the spark plug. The initial combustion at the spark plug is followed by a normal combustion burn. For some reason, likely heat and pressure, the end gas in the chamber spontaneously combusts. The key point here is that detonation occurs after you have initiated the normal combustion with...
Difference between CI and SI engine .
1. In SI engines, a properly mixed air-fuel mixture is provided by an electrical spark. Whereas in CI engines high temperature caused by compressing the air is sufficient for ignition.Hence they are called CI engines.
2.The SI engine works on Otto cycle. WhereasThe CI engine works on Diesel cycle.
3. the fuel used in SI engine is Petrol that burns if left in air at a little bit temperature. It is very volatile. The fuel used in CI engine...
Monday, 5 May 2014
Milling Machine (PPT)
•Used to produce one or more machined surfaces accurately on workpiece
–One or more rotary milling cutters
•Workpiece held on work table or holding device and brought into contact with cutter
•Vertical milling machine most common
•Horizontal milling machine handles operations normally performed by other tools.
ppt on milling machine
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Monday, 31 March 2014
What is Supercharger?
Superchargers are also called forced induction systems. An internal combustion engine works by drawing a mixture of air and fuel (the intake charge) into its cylinders, compressing that mixture and then burning it. The more air/fuel mixture that can be crammed into the cylinders for burn, the more power the engine produces. We can increase power in three basic ways:
1) By improving the engine’s ability to draw more air and fuel...
Friday, 28 February 2014
Lathe Machine (PPT)
The basic engine lathe, which is one of the most widely used machine tools, is very versatile when used by a skilled machinist. However, it is not particularly efficient when many identical parts must be machined as rapidly as possible.The standard engine lathe is not a high production machine, but it can be readily tooled up for many one-piece or short-run jobs.
It is also possible to modify the basic machine for many higher production applications.The...
PPT ON ABS
ANTILOCK BRAKING SYSTEM, which is commonly known as ABS is used as an antiskid device in a vehicle. It used to prevent skidding of wheels while
braking when we want to stop the vehicle or suddenly reduce its speed at any time.ABS was first developed for aircraft use in 1929 by the French automobile and aircraft pioeer, Gabriel Voisin.
download ppt on ABS
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PPT ON HOT WORKING PROCESS
Although basic concepts of many forming processes have remained largely unchanged throughout history, details and equipment have evolved considerably.
Hot-working processes provide means of producing a desired shape.At elevated temperatures, metals weaken and become more ductile.With continual re-crystallization, massive deformation take place without exhausting material plasticity.
PPT ON HOT WORKING PROCE...
PPT ON ROLLING PROCESS
Rolling is usually first process used to convert material into a finished wrought product.Stock can be rolled into blooms, billets, slabs, or these shapes can be obtained directly from continuous casting.
A bloom has a square or rectangular cross section, with a thickness greater than 6 inches and a width no greater than twice the thickness.
Download ppt on ROLLING PROCESS...
Wednesday, 19 February 2014
Advantages and Disadvantages of Chain Drive over Belt or Rope Drive .
Following are the advantages and disadvantages of chain drive over belt or rope drive:
Advantages:-
1.As no slip takes place during chain drive, hence perfect velocity ratio is obtained.
2.Since the chains are made of metal, therefore they occupy less space in width than a belt or
rope drive.
3.It may be used for both long as well as short distances.
4.It gives a high transmission efficiency (upto 98 percent).
5.It gives less load...
components of automobile engine
1)Camshaft:
Camshaft is a type of rotating device or apparatus used in piston engines for propelling or operating poppet valves.
2.)Crankshaft:
Crankshaft is a device, which converts the up and down movement of the piston into rotatory motion.
3)Connecting Rod:
Connecting rods are made of metals, which are used, for joining a rotating wheel to a reciprocating shaft. More precisely, connecting rods also referred to as con...
How Car starts ?
To make an engine start it must be turned at some speed, so that it sucks fuel and air into the cylinders, and compresses it.The powerful electric starter motor does the turning. Its shaft carries a small pinion (gear wheel) which engages with a large gear ring around the rim of the engine flywheel.In a front-engine layout, the starter is mounted low down near the back of the engine.The starter needs a heavy electric current, which it draws through...
What is Detonation in Engine ?
Detonation is the spontaneous combustion of the end-gas (remaining fuel/air mixture) in the chamber. It always occurs after normal combustion is initiated by the spark plug. The initial combustion at the spark plug is followed by a normal combustion burn. For some reason, likely heat and pressure, the end gas in the chamber spontaneously combusts. The key point here is that detonation occurs after you have initiated the normal combustion with the spark plug. Under normal conditions, the combusting air and fuel mixture inside the combustion...
Monday, 17 February 2014
Black is a good conductor of heat, meanwhile tires are made black, Why ?
Originally rubber tires are white, which is the natural color of rubber. In the early 1900s, Binney & Smith began selling their carbon black chemicals to Goodrich Tire Company,
as it was found that the use of carbon black in rubber manufacturing significantly increased certain desirable qualities for rubber meant to be turned into tires.Carbon black works as a reinforcing filler in rubber, which increases the durability and strength...
Tuesday, 7 January 2014
What is the difference between "Industry" and "Factory" ?
The terms factory and industry are used interchangeably, but the meaning of these words are not the same. In fact, industry refers to the production of economic goods. These goods can be materials, products or services. A factory, on the other hand, is the actual location where the materials or products are produced or created.INDUSTRY :-
Industry is the production of an economic good or service within an economy.Manufacturing industry became a...
