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Engine braking is a generally accepted practice and can help save wear on friction brakes. It is even used in some motor sports to reduce the risk of the friction brakes overheating. Additionally, fuel injection engines generally do not use fuel while engine braking. This is known as deceleration fuel cut-off (DFCO).
In contrast, a gasoline engine under deceleration runs with a closed throttle that prevents free flow of air into the cylinders, resulting in little pressure to release at the top of the compression stroke. The closed throttle provides engine braking by forcing the engine to generate a vacuum between the throttle and the cylinders.
Regenerative braking is not by itself sufficient as the sole means of safely bringing a vehicle to a standstill, or slowing it as required, so it must be used in conjunction with another braking system such as friction-based braking.
Target-type thrust reversal (also called bucket thrust reversal or clamshell thrust reversal [1]) is a deceleration method when an aircraft lands. Like other types of thrust reversals, it temporarily diverts the engine exhaust forward to provide deceleration. This type of thrust-reverser is suitable for engines of 3,000 lbf (13 kN) or greater ...
The ABS controller knows that such a rapid deceleration of the car is impossible (and in actuality the rapid deceleration means the wheel is about to slip), so it reduces the pressure to that brake until it sees an acceleration, then it increases the pressure until it sees the deceleration again. It can do this very quickly before the wheel can ...
In the latter part of the 20th century, vehicles with electrical transmission systems (powered by internal combustion engines, batteries, or fuel cells) began to be developed—one advantage of using electric machines is that specific types can regenerate energy (i.e. act as a regenerative brake)—providing deceleration as well as increasing ...
Deceleration ramp down — positive jerk limit; linear increase in acceleration to zero; quadratic decrease in velocity; approaching the desired position at zero speed and zero acceleration Segment four's time period (constant velocity) varies with distance between the two positions.
The rear brake of an upright bicycle can only produce about 0.25 g (≈2.5 m/s 2) deceleration at best, [87] because of the decrease in normal force at the rear wheel as described above. All such bikes with only rear braking are subject to this limitation: for example, bikes with only a coaster brake , and fixed-gear bikes with no other braking ...