For heavy duty trucks like semis hauling lots of cargo over long distances, conventional friction brakes just can't do it on their own. To maintain safe speeds and prevent overheating on long descents ...
Engineering Explained on MSN

What is engine braking? What is a Jake brake?

What Is Engine Braking? What Is A Jake Brake? How does engine braking work? How do you engine brake with a manual transmission? How does a jake brake work? How do diesel cars engine brake? This video ...