engine breaking is stepping off the accelerator and changing to a lower gear than appropriate for the speed of the car to use the vacuum/compression in the cylinders and friction in the drive train to slow the car, the point is to avoid wearing out the brakes and also old brakes weren’t so powerful, it doesn’t really apply to new cars but it’s useful to know how in case your brakes should fail. Jakes brakes are similar but a more deliberate system installed in diesel cars https://en.wikipedia.org/wiki/Compression_release_engine_brake
Latest Answers