More an ancient tool than a groundbreaking gadget, the fire piston relies on basic chemistry to ignite a campfire with the simple pump of a hand. The new Aviator's Ember from Aerohart applies ...

There are several types of engine compression testers. Be sure to use the correct type for your specific engine, otherwise you may get an inaccurate reading.

Converting the ignition of a fuel-air mixture into usable mechanical energy lies at the core of a dizzying number of internal combustion engines developed over the course of more than century.

Unless you drive a Wankel rotary, your combustion engine vehicle has pistons, and each of those pistons has three rings. Why is it always three?