What Is Engine Braking? What Is A Jake Brake?

Dear driver in front of me that is constantly tapping your brakes to adjust your …

Dear driver in front of me that is constantly tapping your brakes to adjust your speed… and you do not need to do that.

Simple let off your throttle pedal and let the engine do some of the work for you. You will save some of the useful life of your brake pads, and see better fuel economy, and (most importantly) not agitate your fellow motorists.

Your engine works as the delightful tool to not just speed your vehicle up but also slow it down.

When you lift off the throttle in the gasoline-drinking car, you are closing the throttle body. This lets air into your engine during the intake stroke of a combustion process.

When the throttle body is closed, well, the air can’t get in when your engine is completing its combustion process so it is now slowing you down and acting as the brake.

A similar event happens in diesel cars as well. Instead of creating the vacuum from the closed throttle body, however, a diesel engine utilizes backpressure as its means of engine braking.

There’s the additional method of engine braking in the diesel and it involves the use of the Jake Brake. We will let Engineering Explained talk you through that one in the video below.

 

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Source: www.speedsociety.com