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2. Harmonic damper - Wikipedia

   en.wikipedia.org/wiki/Harmonic_damper

   A harmonic balancer (sometimes called crankshaft damper, torsional damper, or vibration damper) is the same thing as a harmonic damper except that the balancer includes a counterweight to externally balance the rotating assembly. The harmonic balancer often serves as a pulley for the accessory drive belts turning the alternator, water pump and ...

3. Tuned mass damper - Wikipedia

   en.wikipedia.org/wiki/Tuned_mass_damper

   A schematic of a simple spring–mass–damper system used to demonstrate the tuned mass damper system. Tuned mass dampers stabilize against violent motion caused by harmonic vibration. They use a comparatively lightweight component to reduce the vibration of a system so that its worst-case vibrations are less intense.

4. Engine balance - Wikipedia

   en.wikipedia.org/wiki/Engine_balance

   Harmonic damper for a 1937 Pontiac engine. Torsional vibration develops when torque impulses are applied to a shaft at a frequency that matches its resonant frequency and the applied torque and the resistive torque act at different points along the shaft. It cannot be balanced, it has to be damped, and while balancing is equally effective at ...

5. Torsional vibration - Wikipedia

   en.wikipedia.org/wiki/Torsional_vibration

   The viscous torsional damper is analogous to the hydraulic shock absorber in a car's suspension. Tuned absorber type of "dampers" often referred to as a harmonic dampers or harmonic balancers (even though it technically does not damp or balance the crankshaft). This damper uses a spring element (often rubber in automobile engines) and an ...

6. Harmonic oscillator - Wikipedia

   en.wikipedia.org/wiki/Harmonic_oscillator

   A simple harmonic oscillator is an oscillator that is neither driven nor damped.It consists of a mass m, which experiences a single force F, which pulls the mass in the direction of the point x = 0 and depends only on the position x of the mass and a constant k.

7. Geislinger coupling - Wikipedia

   en.wikipedia.org/wiki/Geislinger_coupling

   A related device is the Geislinger damper. [5] This is broadly the same coupling, but both input and output shafts are connected to the same central hub. The massive outer casing is connected to this through similar leaf spring packs, but is free to move torsionally, with damping. It is used as a harmonic damper to control vibrations in shafts.

8. Damping - Wikipedia

   en.wikipedia.org/wiki/Damping

   The damping ratio provides a mathematical means of expressing the level of damping in a system relative to critical damping. For a damped harmonic oscillator with mass m, damping coefficient c, and spring constant k, it can be defined as the ratio of the damping coefficient in the system's differential equation to the critical damping coefficient:

9. V6 engine - Wikipedia

   en.wikipedia.org/wiki/V6_engine

   To reduce the vibrations caused by this imbalance, most V6 engines use a harmonic damper on the crankshaft and/or a counter-rotating balance shaft. Six-cylinder designs have less pulsation in the power delivery than four-cylinder engines, due to the overlap in the power strokes of the six-cylinder engine.