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Auto | Under the Hood | 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 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.


How the Wave Disk Generator Works

 How the Wave Disk Generator Works

The wave disk generator propulsion system could revolutionize the way we move our vehicles. Read about what makes the wave disk generator so special. See more »

How an Atkinson Cycle Engine Works

 How an Atkinson Cycle Engine Works

An Atkinson cycle engine can complete all four strokes with a single rotation of the crankshaft. Read more about Atkinson cycle engines at HowStuffWorks. See more »

How the Grail Engine Works

 How the Grail Engine Works

What is the Grail Engine? Read about the Grail Engine and how it could change how we drive in the future. See more »

 What are the types of internal combustion engines?

What are the types of internal combustion engines? Visit HowStuffWorks.com to learn the types of internal combustion engines. See more »

The Ultimate Hot Bulb Engine Quiz

 The Ultimate Hot Bulb Engine Quiz

How well do you know hot bulb engines? Take the Ultimate Hot Bulb Engine quiz to find out! See more »

How a Hot Bulb Engine Works

 How a Hot Bulb Engine Works

What were hot bulb engines? Read about hot bulb engines at HowStuffWorks Auto. See more »

How Direct Injection Engines Work

 How Direct Injection Engines Work

Direct injection engines offer high efficiency and performance. Learn how direct injection engines work at HowStuffWorks. See more »

How In-wheel Motors Work

 How In-wheel Motors Work

The in-wheel motor may make many of your car's components obsolete. Read about in-wheel motors and learn how they work in this article. See more »

Rev Up: The Diesel Engine Quiz

 Rev Up: The Diesel Engine Quiz

The diesel quiz will test your knowledge of diesel engines and how they work. Prove you know all things diesel with this quiz at HowStuffWorks. See more »

How the Tesla Turbine Works

 How the Tesla Turbine Works

The Tesla turbine was one of the many inventions of Nikola Tesla, the father of alternating current. Learn more about the Tesla turbine. See more »