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  2. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    Exhaust system of the Opel Corsa B 1.2 petrol Exhaust manifold (chrome plated) on a car engine. An exhaust system is used to guide reaction exhaust gases away from a controlled combustion inside an engine or stove. The entire system conveys burnt gases from the engine and includes one or more exhaust pipes. Depending on the overall system ...

  3. Antilag system - Wikipedia

    en.wikipedia.org/wiki/Antilag_system

    The anti-lag system (ALS) is a method of reducing turbo lag or effective compression used on turbocharged engines to minimize turbo lag on racing or performance cars. It works by retarding the ignition timing and adding extra fuel (and sometimes air) to balance an inherent loss in combustion efficiency with increased pressure at the charging side of the turbo.

  4. Pressure wave supercharger - Wikipedia

    en.wikipedia.org/wiki/Pressure_wave_supercharger

    Energy exchange in the pressure-wave supercharger occurs at sonic velocity, resulting in good response even at low engine speeds, a common downfall of turbocharged engines. It combines the advantages of mechanical and exhaust gas supercharging, offering ample torque at lower engine speeds.

  5. Engine knocking - Wikipedia

    en.wikipedia.org/wiki/Engine_knocking

    In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.

  6. Engine tuning - Wikipedia

    en.wikipedia.org/wiki/Engine_tuning

    Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be mutually exclusive; an engine may be de-tuned with respect to output power in exchange for better economy or longer engine ...

  7. Compression release engine brake - Wikipedia

    en.wikipedia.org/wiki/Compression_release_engine...

    The typical compression brake consists of a hydraulic system using engine oil which transfers the motion of the fuel injector rocker arm to the engine's exhaust valve(s). When activated, the exhaust valve opens very briefly near the engine's top dead center , and releases the compressed air in the cylinder so that the air compression energy is ...

  8. Wastegate - Wikipedia

    en.wikipedia.org/wiki/Wastegate

    One advantage of installing a remote mount wastegate to a free-float (or non-wastegate) turbo includes an allowance for a smaller area over radius (A/R) turbine housing, resulting in less lag time before the turbo begins to spool and create boost. [2] One of the earliest usage of a modern wastegate was in the Saab 99 Turbo 1978, presented in ...

  9. Noise, vibration, and harshness - Wikipedia

    en.wikipedia.org/wiki/Noise,_vibration,_and...

    Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. While noise and vibration can be readily measured, harshness is a subjective quality, and is measured either via jury evaluations, or with analytical ...

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