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  2. Tachometer - Wikipedia

    en.wikipedia.org/wiki/Tachometer

    A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.

  3. Dynamometer - Wikipedia

    en.wikipedia.org/wiki/Dynamometer

    The engine is allowed to accelerate from its starting RPM to its ending RPM, varying at its own acceleration rate, depending on power output at any particular rotational speed. Power is calculated using (rotational speed x torque x constant) + the power required to accelerate the dyno and engine's/vehicle's rotating mass.

  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. Crankshaft position sensor - Wikipedia

    en.wikipedia.org/wiki/Crankshaft_position_sensor

    A crank sensor (CKP) [1] [2] [3] is an electronic device used in an internal combustion engine, both petrol and diesel, to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control the fuel injection or the ignition system timing and other engine parameters.

  6. Boost gauge - Wikipedia

    en.wikipedia.org/wiki/Boost_gauge

    Turbochargers and superchargers are both engine-driven air compressors (exhaust-driven or mechanically driven, respectively) and provide varying levels of boost according to engine rpm, load etc. [4] Quite often there is a power band within a given range of available boost pressure and it is an aid to performance driving to be aware of when ...

  7. Idle (engine) - Wikipedia

    en.wikipedia.org/wiki/Idle_(engine)

    Idle speed, sometimes simply called "idle", is the rotational speed an engine runs at when the engine is idling, that is when the engine is uncoupled from the drivetrain and the throttle pedal is not depressed. In combustion engines, idle speed is generally measured in revolutions per minute (rpm) of the crankshaft.