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  2. Exhaust gas recirculation - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas_recirculation

    The impact of EGR on engine efficiency largely depends on the specific engine design, and sometimes leads to a compromise between efficiency and NO x emissions. In certain types of situations, a properly operating EGR can theoretically increase the efficiency of gasoline engines via several mechanisms: Reduced throttle losses.

  3. Engine efficiency - Wikipedia

    en.wikipedia.org/wiki/Engine_efficiency

    With the help of geometrically variable turbo-charging system (albeit more maintenance) this also increases the engines' torque at low engine speeds (1,200–1,800 rpm). Low speed diesel engines like the MAN S80ME-C7 have achieved an overall energy conversion efficiency of 54.4%, which is the highest conversion of fuel into power by any single ...

  4. Component parts of internal combustion engines - Wikipedia

    en.wikipedia.org/wiki/Component_parts_of...

    An illustration of several key components in a typical four-stroke engine. For a four-stroke engine, key parts of the engine include the crankshaft (purple), connecting rod (orange), one or more camshafts (red and blue), and valves. For a two-stroke engine, there may simply be an exhaust outlet and fuel inlet instead of a valve system.

  5. 10 Tips to Improve Your Gas Mileage - AOL

    www.aol.com/news/2011-05-26-ten-tips-to-improve...

    10 Tips to Improve Your Gas Mileage. Jorgen Wouters. Updated July 14, 2016 at 9:17 PM. Tips for Improving Your Gas Mileage. With a gallon of gas approaching -- or even exceeding, depending on your ...

  6. Variable valve timing - Wikipedia

    en.wikipedia.org/wiki/Variable_valve_timing

    Cylinder head of Honda K20Z3.This engine uses continuously variable timing for the inlet valves. Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions.

  7. Internal combustion engine - Wikipedia

    en.wikipedia.org/wiki/Internal_combustion_engine

    The High-Speed Internal Combustion Engine. Singal, R.K. Internal Combustion Engines. New Delhi, India: Kataria Books. ISBN 978-93-5014-214-1. Stone, Richard (1992). Introduction to Internal Combustion Engines (2nd ed.). Macmillan. ISBN 978-0-333-55083-0. Yamagata, H. (2005). The Science and Technology of Materials in Automotive Engines ...

  8. Volumetric efficiency - Wikipedia

    en.wikipedia.org/wiki/Volumetric_efficiency

    A more modern technique for four-stroke engines, variable valve timing, attempts to address changes in volumetric efficiency with changes in speed of the engine: at higher speeds the engine needs the valves open for a greater percentage of the cycle time to move the charge in and out of the engine.

  9. Four-stroke engine - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_engine

    The Lenoir engine ran on illuminating gas made from coal, which had been developed in Paris by Philip Lebon. [2] In testing a replica of the Lenoir engine in 1861, Otto became aware of the effects of compression on the fuel charge. In 1862, Otto attempted to produce an engine to improve on the poor efficiency and reliability of the Lenoir engine.

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