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Published On: Tue, May 12th, 2015

How engine damper works

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The function of the damper is to reduce the torsional vibrations caused by the fluctuation of engine torque. This helps to protect the drive system from failure, from these vibrations. The damper also helps on absorbing the impact torque generated when accelerated suddenly.

Normally in heavy duty applications engine dampers are a necessity.

So in an abstract it can be explained as – the damper absorbs the torsional vibration and impact load coming from the engine, this protect the power train components such as torque converter, transmission etc.As you can see in the drawing, damper is fixed between the engine and the transmission and can be considered as a part of the engine itself.

As explained earlier the requirement of engine dampers are crucial in long crank shaft engines. But normally now a days it can be noticeable in even smaller range of engines as it reduces the torsional vibration. The frequency if torsional vibration will directly affect the life of the crank shaft.

In the absence of the damper the crank shaft wool have a tendency to act also like torsional spring. In the normal working of the engine, crank shaft will behave like a torsional spring due to the action of the connecting rod load acting on the crank shaft and if at a particular RPM if it’s working continuously, the crank shaft will be prone to fatigue failure or vibration resulting fur further failure. 

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