{"id":5680,"date":"2023-05-08T12:11:04","date_gmt":"2023-05-08T12:11:04","guid":{"rendered":"https:\/\/seadonna.com\/blog\/?p=5680"},"modified":"2023-06-02T17:30:57","modified_gmt":"2023-06-02T17:30:57","slug":"classification-of-internal-combustion-engines-meo-class-4-2","status":"publish","type":"post","link":"https:\/\/seadonna.com\/blog\/classification-of-internal-combustion-engines-meo-class-4-2\/","title":{"rendered":"Classification of INTERNAL COMBUSTION ENGINES |  MEO CLASS 4"},"content":{"rendered":"<p><strong>Classification of INTERNAL COMBUSTION ENGINES.<\/strong><br \/>\nClassification can be done under various categories:<br \/>\n1) 2-stroke or 4-stroke: Usually, 2-stroke is preferred for marine engine propulsion while 4-stroke is preferred for auxiliary diesel generation.<br \/>\n2) Fuel used: Petroleum fuel ( gasoline, naphtha, kerosene, gas oil, diesel oil), heavy fuel ( motor oil, burner fuel), residual fuels, gaseous fuels (natural or producer gas) and mixed fuel (liquid fuel for starting combustion and gaseous fuel for running ).<br \/>\n3) Single or Double Acting: A single acting engine is one where the upper part of the cylinder is used for combustion. A double acting engine is one which uses both the upper and lower part of the cylinder alternatively. e.g. Opposed piston engines.<br \/>\n4) Naturally Aspirated or Supercharged: In naturally aspirated engines, the piston itself sucks in air (e.g. 4-stroke engines) or is fed by a scavenge pump (2-stroke engines). In supercharged engines, air under pressure is supplied to the cylinder which is pressurized externally by mechanical means or an exhaust blower.<br \/>\n5) Compression Ignition (marine diesel engines) or Spark Ignition (carburetor and gas engines): In compression ignition, the fuel ignites with the air due to high temperature caused by compression of air. In spark ignition, an external electric spark is used for ignition.<br \/>\n6) Trunk type engines (4-stroke engines) or Crosshead engines<br \/>\n(2-stroke engines): In trunk type engines, the piston has an extended skirt which acts as a guide. In crosshead engines, there is a crosshead which has shoes sliding over the crosshead guides.<br \/>\n7) Single or Multi cylinder: Modern marine engines use 4 to 12 cylinders.<br \/>\n8) V, W or X pattern of arrangement of the cylinders.<br \/>\n9) Main Propulsion use (Ship&#8217;s propeller drive) or Auxiliary engine use (power generation &amp; auxiliaries).<br \/>\n10) Low, Medium, and High Speed Low speed<br \/>\n(100 to 350 rpm)<br \/>\nMedium speed<br \/>\n(350 to 750 rpm)<br \/>\nHigh speed<br \/>\n(750 to 2500 \u0433\u0440\u0442).<br \/>\n11) Mean Piston Speed<br \/>\nLow speed<br \/>\n(4.5 m\/s to 7 m\/s)<br \/>\nMedium speed<br \/>\n(7 m\/s to 10 m\/s)<br \/>\nHigh speed<br \/>\n(10 m\/s to 15 m\/s).<br \/>\n12) Uni directional (same direction) or Reversible Engines using a reversing mechanism.<br \/>\n13) Ahead direction in clockwise or anti-clockwise direction.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Classification of INTERNAL COMBUSTION ENGINES. Classification can be done under various categories: 1) 2-stroke or 4-stroke: Usually, 2-stroke is preferred for marine engine propulsion while 4-stroke is preferred for auxiliary diesel generation. 2) Fuel used: Petroleum fuel ( gasoline, naphtha, kerosene, gas oil, diesel oil), heavy fuel ( motor oil, burner fuel), residual fuels, gaseous [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5680","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5680","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/comments?post=5680"}],"version-history":[{"count":1,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5680\/revisions"}],"predecessor-version":[{"id":5835,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5680\/revisions\/5835"}],"wp:attachment":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/media?parent=5680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/categories?post=5680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/tags?post=5680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}