{"id":6340,"date":"2024-08-29T15:53:55","date_gmt":"2024-08-29T15:53:55","guid":{"rendered":"https:\/\/svestudy.com\/?page_id=6340"},"modified":"2025-05-12T19:21:34","modified_gmt":"2025-05-12T19:21:34","slug":"mde-unit-5-q6-answer","status":"publish","type":"page","link":"https:\/\/svestudy.com\/?page_id=6340","title":{"rendered":"MDE Unit 5 Q6 \u2013 Answer"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"107\" src=\"https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-198-1024x107.png\" alt=\"\" class=\"wp-image-5914\" srcset=\"https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-198-1024x107.png 1024w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-198-300x31.png 300w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-198-768x80.png 768w, https:\/\/svestudy.com\/wp-content\/uploads\/2024\/08\/image-198.png 1037w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(a) Labeled Sketch:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>Scroll Housing:<\/strong> Houses the spiral groove (scroll).<\/li>\n\n\n\n<li class=\"\"><strong>Spiral Groove (Scroll):<\/strong> Helical groove machined inside the housing.<\/li>\n\n\n\n<li class=\"\"><strong>Rotor:<\/strong> Spool-shaped rotor with a tight fit inside the scroll.<\/li>\n\n\n\n<li class=\"\"><strong>Eccentric Cam Follower Pin:<\/strong> Off-center pin on the rotor.<\/li>\n\n\n\n<li class=\"\"><strong>Cam Follower Groove:<\/strong> Groove on the drive sleeve where the pin rides.<\/li>\n\n\n\n<li class=\"\"><strong>Drive Sleeve:<\/strong> Connected to the engine, rotates the rotor.<\/li>\n\n\n\n<li class=\"\"><strong>Inlet Port:<\/strong> Where fuel enters the pump.<\/li>\n\n\n\n<li class=\"\"><strong>Outlet Port:<\/strong> Where fuel exits towards the engine injectors.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>(b) Varying End of Delivery<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The scroll type fuel pump sketched in part (a) doesn&#8217;t directly control the &#8220;end of delivery&#8221; (injection timing) of fuel.&nbsp; Fuel injection timing is typically controlled by a separate mechanism within the engine&#8217;s fuel injection system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The scroll pump&#8217;s function is to <strong>meter the fuel quantity<\/strong> delivered per engine cycle based on load. Here&#8217;s how the pump design indirectly affects the end of delivery:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\"><strong>High Load:<\/strong> As explained previously, larger pockets form at high load, delivering more fuel per pump revolution. This <strong>increases the volume of fuel available<\/strong> for injection during the injection window controlled by the separate injection timing mechanism.<\/li>\n\n\n\n<li class=\"\"><strong>Low Load:<\/strong> Smaller pockets deliver less fuel per revolution, reducing the <strong>amount of fuel available<\/strong> for injection during the same injection window.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In essence, the scroll pump indirectly influences the end of delivery by providing a <strong>variable fuel quantity<\/strong> based on load, which can then be injected at the appropriate time determined by the injection timing control system.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>(a) Labeled Sketch: (b) Varying End of Delivery The scroll type fuel pump sketched in part (a) doesn&#8217;t directly control the &#8220;end of delivery&#8221; (injection timing) of fuel.&nbsp; Fuel injection timing is typically controlled by a separate mechanism within the engine&#8217;s fuel injection system. The scroll pump&#8217;s function is to meter the fuel quantity delivered [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"templates\/template-full-width.php","meta":{"nf_dc_page":"","footnotes":""},"class_list":["post-6340","page","type-page","status-publish","hentry"],"featured_image_src":null,"_links":{"self":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/6340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/svestudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6340"}],"version-history":[{"count":1,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/6340\/revisions"}],"predecessor-version":[{"id":6351,"href":"https:\/\/svestudy.com\/index.php?rest_route=\/wp\/v2\/pages\/6340\/revisions\/6351"}],"wp:attachment":[{"href":"https:\/\/svestudy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}