{"id":5681,"date":"2023-05-08T12:15:16","date_gmt":"2023-05-08T12:15:16","guid":{"rendered":"https:\/\/seadonna.com\/blog\/?p=5681"},"modified":"2023-06-02T17:30:49","modified_gmt":"2023-06-02T17:30:49","slug":"classification-of-internal-combustion-engines-meo-class-4","status":"publish","type":"post","link":"https:\/\/seadonna.com\/blog\/classification-of-internal-combustion-engines-meo-class-4\/","title":{"rendered":"CLASSIFICATION OF INTERNAL COMBUSTION ENGINES | MEO Class 4"},"content":{"rendered":"

Classification of Internal Combustion Engines<\/strong>\"\"<\/strong><\/h3>\n

Classification can be done under various categories:<\/p>\n

1) 2-stroke or 4-stroke<\/strong>: Usually, 2-stroke is preferred for marine engine propulsion while 4-stroke is preferred for auxiliary diesel generation.<\/p>\n

2) Fuel used<\/strong>: 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 ).<\/p>\n

3) Single or Double Acting<\/strong>: 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.<\/p>\n

4) Naturally Aspirated or Supercharged<\/strong>: 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.<\/p>\n

5) Compression Ignition (marine diesel engines) or Spark Ignition (carburetor and gas engines)<\/strong>: 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.<\/p>\n

6) Trunk type engines (4-stroke engines) or Crosshead engines <\/strong>(2-stroke engines):<\/strong> 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.<\/p>\n

7) Single or Multi cylinder<\/strong>: Modern marine engines use 4 to 12 cylinders.<\/p>\n

8) V, W or X pattern of arrangement of the cylinders<\/strong>.<\/p>\n

9) Main Propulsion use (Ship’s propeller drive) or Auxiliary engine use (power generation & auxiliaries).<\/strong><\/p>\n

10) Low, Medium, and High Speed<\/strong><\/p>\n

Low speed – <\/span>(100 to 350 rpm)<\/span><\/p>\n

Medium speed – (350 to 750 rpm)
\nHigh speed – (750 to 2500 \u0433\u0440m).<\/p>\n

11) Mean Piston Speed<\/strong>
\nLow speed – (4.5 m\/s to 7 m\/s)
\nMedium speed – (7 m\/s to 10 m\/s)
\nHigh speed – (10 m\/s to 15 m\/s).<\/p>\n

12) Uni directional (same direction) or Reversible Engines using a reversing mechanism.<\/strong><\/p>\n

13) Ahead direction in clockwise or anti-clockwise direction<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

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 […]<\/p>\n","protected":false},"author":1,"featured_media":5682,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"class_list":["post-5681","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-marine-engineering-competency-exams-study-blogs"],"_links":{"self":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5681","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=5681"}],"version-history":[{"count":2,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5681\/revisions"}],"predecessor-version":[{"id":5684,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/posts\/5681\/revisions\/5684"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/media\/5682"}],"wp:attachment":[{"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/media?parent=5681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/categories?post=5681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/seadonna.com\/blog\/wp-json\/wp\/v2\/tags?post=5681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}