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  2. 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 ...

  3. Active Fuel Management - Wikipedia

    en.wikipedia.org/wiki/Active_Fuel_Management

    It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy. Estimated performance on EPA tests shows a 5.5–7.5% improvement in fuel economy. [1] GM's Active Fuel Management [2] technology used a solenoid to deactivate the lifters on selected cylinders of a pushrod V-layout engine.

  4. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    A check engine light or malfunction indicator lamp (MIL), is a tell-tale that a computerized engine-management system uses to indicate a malfunction or problem with the vehicle ranging from minor (such as a loose gas cap) to serious (worn spark plugs, engine problems or a faulty oil valve, etc.).

  5. Hybrid vehicle drivetrain - Wikipedia

    en.wikipedia.org/wiki/Hybrid_vehicle_drivetrain

    This approach isolates the engine from demand, allowing it to operate only at its most efficient speed. The engine can be much smaller, since it does not have to accommodate high speed/acceleration. Traction motors are typically powered only by the battery, which can also be charged from external sources.

  6. Harmonic damper - Wikipedia

    en.wikipedia.org/wiki/Harmonic_damper

    Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft.

  7. Ignition timing - Wikipedia

    en.wikipedia.org/wiki/Ignition_timing

    Pressure in cylinder pattern in dependence on ignition timing: (a) - misfire, (b) too soon, (c) optimal, (d) too late. In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke.

  8. GM LT1 engine - Wikipedia

    en.wikipedia.org/wiki/GM_LT1_engine

    1970–1972 LT-1 – Chevrolet Generation I Small-Block; 1992–1997 LT1 – GM Generation II Small-Block; 2013–(current) ... GM LT1 engine. 1 language ...

  9. General Motors Rotary Combustion Engine - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Rotary...

    The final design General Motors Rotary Combustion Engine (GMRCE) was fixed when responsibility for the power plant's manufacture was turned over to General Motors Hydra Matic Division in August 1972 – two rotors displacing 206 cubic inches (3.38 L), twin distributors and coils, and a switch to aluminum housing construction.

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