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  2. Balance shaft - Wikipedia

    en.wikipedia.org/wiki/Balance_shaft

    Balance shaft in Ford Taunus V4 engine. Balance shafts are used in piston engines to reduce vibration by cancelling out unbalanced dynamic forces. The counter balance shafts have eccentric weights and rotate in opposite direction to each other, which generates a net vertical force. The balance shaft was invented and patented by British engineer ...

  3. Engine balance - Wikipedia

    en.wikipedia.org/wiki/Engine_balance

    Engine balance refers to how the inertial forces produced by moving parts in an internal combustion engine or steam engine are neutralised with counterweights and balance shafts, to prevent unpleasant and potentially damaging vibration. The strongest inertial forces occur at crankshaft speed (first-order forces) and balance is mandatory, while ...

  4. Mercedes-Benz OM642 engine - Wikipedia

    en.wikipedia.org/wiki/Mercedes-Benz_OM642_engine

    The engine features a counter-rotating balance shaft mounted between the cylinder banks to cancel the vibrations inherent to the 72 degree V6 design, and the crankpins are offset by 48 degrees to achieve even 120 degree firing intervals.

  5. Balancing of rotating masses - Wikipedia

    en.wikipedia.org/wiki/Balancing_of_rotating_masses

    These four readings are sufficient to define the size and position of a final mass to achieve good balance. Ref 4 For production balancing, the phase of dynamic vibration is observed with its amplitude. This allows one-shot dynamic balance to be achieved with a single spin, by adding a mass of internally calculated size in a calculated position.

  6. List of Volkswagen Group petrol engines - Wikipedia

    en.wikipedia.org/wiki/List_of_Volkswagen_Group...

    GJL 250 grey cast iron; 33 kg (73 lb), die-forged steel crankshaft with five 58 mm (2.28 in) diameter main bearings, two chain-driven counter-rotating balance shafts suppressing second degree free inertial forces and oil pump, horizontal-baffled oil sump. The water pump bolts to the side of the block, under the intake manifold, and is driven by ...

  7. Nissan QR engine - Wikipedia

    en.wikipedia.org/wiki/Nissan_QR_engine

    The QR25DE is a 2.5 L (2,488 cc) variant built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. The engine bore and stroke is 89 mm × 100 mm (3.50 in × 3.94 in) and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.

  8. 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.

  9. Counterweight - Wikipedia

    en.wikipedia.org/wiki/Counterweight

    A simple crane. A counterweight is a weight that, by applying an opposite force, provides balance and stability of a mechanical system. [1] The purpose of a counterweight is to make lifting the load faster and more efficient, which saves energy and causes less wear and tear on the lifting machine.

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