Spark-ignition engine

<h2 id="fuels">Fuels</h2>
<p>Spark-ignition engines are commonly referred to as "gasoline engines" in North America, and "petrol engines" in Britain and the rest of the world.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> Spark-ignition engines can (and increasingly are) run on fuels other than <a href="/facts/Gasoline/lcnxq5BS">petrol/gasoline</a>, such as <a href="/facts/Autogas/63cElx5y">autogas</a> (<a href="/facts/Liquefied_petroleum_gas/bw6trakm">LPG</a>), <a href="/facts/Methanol/EIfpoNCg">methanol</a>, <a href="/facts/Ethanol/3lCLfBSP">ethanol</a>, <a href="/facts/Bioethanol/3lCLfBSP">bioethanol</a>, <a href="/facts/Compressed_natural_gas/tMsYjxMK">compressed natural gas</a> (CNG), <a href="/facts/Hydrogen/BoYHjl0J">hydrogen</a>, and (in drag racing) <a href="/facts/Nitromethane/mfVA2AA1">nitromethane</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>
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<h2 id="working-cycle">Working cycle</h2>
<p>The working cycle of both spark-ignition and compression-ignition engines may be either <a href="/facts/Two-stroke_cycle/Al4uUeo9">two-stroke</a> or <a href="/facts/Four-stroke_cycle/70vDIDvJ">four-stroke</a>.
</p><p>A <a href="/facts/Four-stroke/70vDIDvJ">four-stroke</a> spark-ignition engine is an <a href="/facts/Otto_cycle/jP5s560r">Otto cycle</a> engine. It consists of following four strokes: <a href="/facts/Intake_stroke/whnTkDl3">suction or intake stroke</a>, <a href="/facts/Compression_stroke/whnTkDl3">compression stroke</a>, <a href="/facts/Power_stroke_(engine)/whnTkDl3">expansion or power stroke</a>, <a href="/facts/Exhaust_stroke/whnTkDl3">exhaust stroke</a>. Each stroke consists of 180 degree rotation of crankshaft rotation and hence a <a href="/facts/Four-stroke/70vDIDvJ">four-stroke</a> cycle is completed through 720 degree of crank rotation. Thus for one complete cycle there is only one power stroke while the crankshaft turns by two revolutions.
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<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Multifuel/2drFfMq8">Multifuel engine</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Dabelstein, Werner; Reglitzky, Arno; Schütze, Andrea; Reders, Klaus; Brunner, Andreas (2016). "Automotive Fuels". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. pp. 1–41. doi:10.1002/14356007.a16_719.pub3. ISBN 9783527306732. <a href="9783527306732" target="_blank">9783527306732</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Naijar, Yousef S.H. (2009). "Alternative Fuels for Spark Ignition Engines". The Open Fuels & Energy Science Journal. 2 (2): 1–9. doi:10.2174/1876973X01002010001. <a href="https://doi.org/10.2174%2F1876973X01002010001" target="_blank">https://doi.org/10.2174%2F1876973X01002010001</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
</ol>

Spark-ignition engine open-in-new

Spark-ignition engine