What does “engine braking” involve?

Engine braking involves using the engine's resistance to help slow down the vehicle when the driver downshifts into a lower gear. This technique takes advantage of the deceleration properties of the engine, as the higher compression in lower gears creates a vacuum effect that resists the forward motion of the car. When the driver downshifts, the engine revs up to match the new gear's speed, which generates a braking force that can be felt as the vehicle slows down.

This method is particularly useful in situations where controlled slowing is required, such as descending a hill or preparing to stop, as it can reduce wear on the braking system and help maintain better control over the vehicle. It facilitates smoother transitions during braking and allows for greater control, especially in slippery conditions.