Exhaust brakes acquire been saving lives for another than 30 senescence.
Exhaust Brakes (a.k.a. Jake or Jacobs brakes) are one proven method of reducing brake wear on massive trucks, and increasing downhill safety. After installing one of these effortless butterfly valves, the Chauffeur can effectively domination downhill acceleration without using the foot brakes, which can rapidly overheat and fail under continued exercise. On the other hand, too as they might business, exhaust brakes can participation failures caused by both usual wear and improper usage.
Shut Off
The locale: A Chauffeur engages the exhaust brake, and it engages for a hardly any seconds before releasing. This contingency is normally caused by either an upstream exhaust leak, or a blown gasket. Either idea, the exhaust brake is not receiving the energy it needs to stay dehiscent. This is an more and more accepted occupation on many aging aftermarket exhaust brakes in that they might chalk up come with inferior gaskets from the workshop.
Rattling
Latest exhaust brakes generally effect not vent directly to the gone cognate old-school units, which is why advanced tractor trailers lone query a stable growl when braking instead of the rifle-sharp rattling of yore. Whether you hear a deafening clink when the exhaust brake is busy, then there is a leak either on the exhaust bypass, exhaust manifold or exhaust brake gasket.
Turbo Overheating
The expectation of an exhaust brake is to reduce or eliminate exhaust flow completely, which means the turbo and exhaust manifold must contain all of the accumulated heat of exhaust. Factory turbo-diesel engines already have very tough iron turbo castings to deal with this heat-sinking problem, but even they can be overwhelmed and begin to melt down.
Engine Overheating
Over-Revving
Though almost all modern turbo-diesels have some sort of self-protection system to intercede in the event of an overheat, even the best designed cannot cope with an uncontrolled over-rev. If the transmission is in too low of a gear for the hill to be descended, a Jake brake might apply enough force to stick the transmission in gear and over-rev the engine to the point of destruction.This condition can come on very quickly, especially if the engine revs too high while the exhaust brake is engaged. The friction created by a running engine and the small amount of diesel still being injected creates a great deal of heat, which the engine is unable to eliminate when the exhaust is blocked. Over-revving while on the Jake brake can lead to rapid localized overheating, and engine safety shut-down.
