Thursday, November 29, 2012

Car Engines

by Science Terminal, This post originally appeared at Science Avengers.

Hello everyone, this is Science Terminal, and I am going to show you guys about the car engines! 

In my opinion, engines are the best inventions; they are very efficient and mechanical.

First, let’s start with this simple engine model that shows you how cylinders and pistons work. By the way, this is an “L” engine (cylinders are arranged in a LINE!).





This kind of engines is commonly used in plenty of normal cars (like home of family cars). The only shortcoming of this sort of engines is if there are too many cylinders, it will be very long.

So, people improved a new structure V engines.

V engines are very popular as well, many SUVs, high level cars and racing cars are using this kind of engines. The structures of V engines are very balanced; compact designs have made these engines common. By the way, the angle between two rows of cylinders is usually 90 degrees; however, for Renault F1 V10 engine, the angle is a little bigger than normal ones.

Next, let’s talk about H(horizontal)/Flat engines. They are kinda like V engines, but they have the angle of 180 degrees in between.


They are not very commonly used, only Porsche and Subaru are using this technique.

Then, there are some “weird” engines that are also well known.

W engines

This sort of engines is currently only used in Bugatti Veyron 16.4, which is one of the fastest cars in the world. These engines have more complicated structures and a little bit less steady; however, they require less space so it is convenient for having many cylinders.

Rotary Engines

As you can see, this engine does not use cylinders but two rotors. Only Mazda RX-8 is using this kind of engines. Even though these engines are not popular, they have good designs and new ideas of engines.

In addition, there are plenty of “upgrades” for car engines.

The most popular one would be Turbochargers.

Basically, what a turbocharger does is that it takes the wasted air form cylinders and then convert them into new power for the air input so that the engine will be more efficient.

And a new technique for the oil input is FSI (Fuel Stratified Injection) from Audi.

For a long time, the oil will be combined with air before going into cylinders, that is just relatively inefficient because the oil molecules sometimes will stick onto the input valve which is wasted. FSI can solve this problem by split the injection of oil up with the air; however, it requires accurate calculations for the injection. And now it is possible!

Hope you have enjoyed!

Yours,
Science Terminal

About this contributor: Science Terminal is very interested in modern technology, and he spends plenty of time on computer designs and programming. He really has fun thinking deeper and solving logic problems. 

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