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what is otto cycle ??

Posted by MADHUR | Labels: , , , , , , ,

  
nikolus otto

The four-stroke approach is also known as the Otto cycle, in honor of Nikolaus Otto, who invented it in 1867. 


 the four stroke are 
  • Intake stroke
  • Compression stroke
  • Combustion stroke
  • Exhaust stroke


 The piston is connected to the crankshaft by a connecting rod. As the crankshaft revolves, it has the effect of "resetting the piston"

what is intake stroke ????
The piston starts at the top, the intake valve opens, and the piston moves down to let the engine take in a cylinder-full of air and gasoline. This is the intake stroke.

plz note:- Only the tiniest drop of gasoline needs to be mixed into the air for this to work. 

what is compression stroke ???
after the cycle of intake stroke  the piston moves back up to compress this fuel/air mixture. Compression makes the explosion more powerful. 

what is combustion stroke ??
When the piston reaches the top of its stroke, the spark plug emits a spark to ignite the gasoline. The gasoline charge in the cylinder explodes, driving the piston down. 

what is exhaust stroke ??
Once the piston hits the bottom of its stroke, the exhaust valve opens and the exhaust leaves the cylinder to go out the tailpipe. 

Now the engine is ready for the next cycle, so it intakes another charge of air and gas.

Notice that the motion that comes out of an internal combustion engine is rotational, . In an engine the linear motion of the pistons is converted into rotational motion by the crankshaft. The rotational motion is nice because we plan to turn (rotate) the car's wheels with it anyway.

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Posted by MADHUR
Location: Ambala Cantt, Ambala City, Haryana, India
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what is The ­principle behind any reciprocating internal combustion engine

Posted by MADHUR |

Internal Combustion is The ­principle behind any reciprocating internal combustion engine: now the question arises what is internal combustion engine guys in car engines we need to have more energy but the space from where this energy is to produced is small so the basic principle of internal combustion engine is if you you put a tiny amount of high-energy fuel (like gasoline) in a small, enclosed space and ignite it, an incredible amount of energy is released in the form of expanding gas. You can use that energy to propel a potato 500 feet. In this case, the energy is translated into potato motion. You can also use it for more interesting purposes. For example, if you can create a cycle that allows you to set off explosions like this hundreds of times per minute, and if you can harness that energy in a useful way, what you have is the core of a car engine!this is the basic principle behind the car engine ....

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Posted by MADHUR
Location: Ambala Cantt, Ambala City, Haryana, India
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principle behind cAR working????

Posted by MADHUR |

Compared to other technologies we use every day, it seems like car engines haven't really changed much. The engine in an old Ford Model T has plenty in common with the engine in a 2011 Ford Fusion, but it's doubtful Alexander Graham Bell would know what to do with an iPhone. While communications technology has changed drastically, car engines use the same basic principle: The combustion of air and fuel to create rotational force and move a car.
But while the same basic principles that drove the first car engines are still used today, modern car engines have evolved to meet the power and efficiency needs of today's drivers. Think of older car engines as wolves and modern car engines as dogs. They're share the same heritage and have similar characteristics, but one does just fine in everyday modern situations, while the other just couldn't adapt to living in a city or suburb.
Before we talk about how modern car engines are different from older ones, you need to understand the basics of how a car engine works. Basically, gasoline and air are ignited in a cylinder. In the cylinder is a piston that gets moved up and down by the gasoline/air explosion. The piston is attached to the crankshaft. As the piston moves up and down, it makes the crankshaft rotate. The crankshaft goes out to the transmission, which transmits that power to the car's wheels. Sounds simple, right? With modern engines the basics still apply, but there's a lot more to think about.Your basic gasoline car engine isn't all that efficient. Of all the chemical energy in gasoline, only about 15 percent gets converted into the mechanical energy that actually moves the car. The EPA says over 17 percent of the energy is lost as the engine idles, and a whopping 62 percent is lost in the engine due to heat and friction.
Modern engines have a number of technologies in place to make them more efficient. For example, direct injection technology, which mixes the fuel and the air before they're put into the cylinder, can improve engine efficiency by 12 percent because the fuel burns more efficiently [source: U.S. Department of Energy]. Turbochargers, which use compressed air from the car's exhaust system, compress the air that's used in the combustion cycle. The compressed air leads to more efficient combustion. Variable-valve timing and cylinder deactivation are technologies that allow the engine to use only the fuel it needs, increasing efficiency.

There's a common misconception that efficient engines are underpowered engines.

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what is a v8 engine

Posted by MADHUR |

hello guys this is my first blog on cars so let me be very clear on what i will be sharing on this blog ....
everything that i know and would also love to listen from you what you will like to read 
so first query will be 

what is a v8 engine 

A V8 engine is a V engine with eight cylinders mounted on the crankcase in two banks of four cylinders, in most cases set at a right angle to each other but sometimes at a narrower angle, with all eight pistons driving a common crankshaft.

In its simplest form, it is basically two straight-4 engines sharing a common crankshaft. However, this simple configuration, with a single-plane crankshaft, has the same secondary dynamic imbalance problems as two straight-4s, resulting in vibrations in large engine displacements. As a result, since the 1920s most V8s have used the somewhat more complex crossplane crankshaft with heavy counterweights to eliminate the vibrations. This results in an engine which is smoother than a V6, while being considerably less expensive than a V12 engine. Most racing V8s continue to use the single plane crankshaft because it allows faster acceleration and more efficient exhaust system designs.

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Posted by MADHUR
Location: Ambala Cantt, Ambala City, Haryana, India
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