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Types of Engines

The types of engines you'll learn about in this section include diesel, rotary, HEMI, stirling and quasiturbine, to name a few. You'll also see photos and animated images of the technologies we explore.

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How does a Miller-cycle engine work?

Mazda has been using this type of engine in some of its cars for several years. Learn what a Miller-Cycle engine is and how it works.


Did cars ever have external combustion engines?

Most modern cars and trucks are powered by an internal combustion engine. But was there ever a time when vehicles were powered by engines that required an external source of heat? See more »

Inside an Opposed Piston Opposed Cylinder (OPOC) Engine

Do you know how Opposed Piston Opposed Cylinder (OPOC) engines work? Check out this amazing graphic that explains how OPOC engines work! See more »

Inside a Sleeve Valve Engine

Do you know how sleeve valve engines work? Check out this amazing graphic that explains how sleeve valve engines work! See more »

5 Benefits of Beltless Engines

Look under the hood of most cars and you'll probably find one or more pulley-driven belts. But if one of those engine belts break, your car can suddenly become undriveable. See more »

How to Make a Coke Can Stirling Engine

With a simple soda can and a handful of basic tools and accessories, it's possible to make one of the first commercially viable engines ever made. Find out what makes a Coke can Stirling engine chug away. See more »

How does an electric water pump benefit your engine?

The traditional water pump is a relatively simple, belt-driven component. But could an electric water pump be more efficient and more in tune with your engine's specific cooling needs? See more »

How the Hüttlin Spherical Engine Works

It may take a bit of time to understand how this ball gets rolling; but once you get it, you'll see how it just might take hybrid auto engineering to the next level. See more »

How Sleeve-valve Engines Work

The sleeve-valve engine may have already been dismissed as a historical relic; however, at least one company is seeking to bring the sleeve-valve engine back into action -- with a few modern twists. See more »

How Opposed Piston Opposed Cylinder (OPOC) Engines Work

Internal combustion engines aren't going away anytime soon. And since a practical alternative can't be ready for use within the next few years, we need a better internal combustion engine in the meantime. See more »

How the Wave Disk Generator Works

The wave disk generator is a propulsion system that could revolutionize the way we move our vehicles. But we've all heard that before, right? So what makes this one so special? See more »