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Engineering
Mechanical Engineering
Exhaust brake for gasoline engines
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[QUOTE=".Scott, post: 6027548, member: 489053"] First we need to note the difference between an exhaust brake (where the exhaust is simply obstructed) and a Jake Brake (where the engine is used to compress air). Even if you don't have an exhaust brake, keeping your engine in gear while descending a steep hill will spare your brakes. Mt Washington (6289 feet) is a few hours drive from where I live. I have seen the results of drivers trying to descend that road without using low gear and without stopping to rest their brakes. The result is a lot of heat, a lot of smoke, and a car that will cannot fully come to a stop without hitting something. So given that a non-diesel engine is already capable of providing some braking. Any incremental improvement will be that much more beneficial. The key advantage in engine braking (low gear, exhaust braking, or Jake braking) is that the engine is bigger that the brake with a more effective cooling system. So it is in a better adapted to slowing the vehicle without damage to itself. This braking isn't a replacement to use of the braking system - but is supplemental. It takes enough of the load away from the brakes to keep the brakes from overheating in heavy (but not urgent) braking situations. [/QUOTE]
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Mechanical Engineering
Exhaust brake for gasoline engines
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