{"id":39316,"date":"2026-03-20T00:58:10","date_gmt":"2026-03-19T22:58:10","guid":{"rendered":"https:\/\/diagnozabam.ro\/sfaturi\/?p=39316"},"modified":"2026-03-20T00:58:10","modified_gmt":"2026-03-19T22:58:10","slug":"diesel-knock-explained-the-real-cause","status":"publish","type":"post","link":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/diesel-knock-explained-the-real-cause\/","title":{"rendered":"Diesel Knock Explained: The Real Cause"},"content":{"rendered":"<h2 data-start=\"382\" data-end=\"406\">What Is Diesel Knock?<\/h2>\n<p data-start=\"408\" data-end=\"522\"><strong data-start=\"408\" data-end=\"424\">Diesel knock<\/strong> is the sharp metallic sound produced during abnormal combustion in a compression-ignition engine.<\/p>\n<p data-start=\"524\" data-end=\"622\">Unlike <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/do-gasoline-engines-have-injectors-full-technical-breakdown\/\">gasoline<\/a> knock (detonation), diesel knock is mainly caused by <strong data-start=\"593\" data-end=\"621\">excessive ignition delay<\/strong>.<\/p>\n<p data-start=\"624\" data-end=\"639\">It occurs when:<\/p>\n<ol data-start=\"641\" data-end=\"767\">\n<li data-start=\"641\" data-end=\"661\">\n<p data-start=\"644\" data-end=\"661\">Fuel is injected.<\/p>\n<\/li>\n<li data-start=\"662\" data-end=\"685\">\n<p data-start=\"665\" data-end=\"685\">Ignition is delayed.<\/p>\n<\/li>\n<li data-start=\"686\" data-end=\"715\">\n<p data-start=\"689\" data-end=\"715\">Too much fuel accumulates.<\/p>\n<\/li>\n<li data-start=\"716\" data-end=\"767\">\n<p data-start=\"719\" data-end=\"767\">Sudden combustion causes a rapid pressure spike.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"769\" data-end=\"816\">That pressure spike creates the knocking sound.<\/p>\n<hr data-start=\"818\" data-end=\"821\" \/>\n<h2 data-start=\"823\" data-end=\"852\">The Role of Ignition Delay<\/h2>\n<p data-start=\"854\" data-end=\"920\">Ignition delay is the time between injection and combustion start.<\/p>\n<p data-start=\"922\" data-end=\"943\">If ignition delay is:<\/p>\n<ul data-start=\"945\" data-end=\"1014\">\n<li data-start=\"945\" data-end=\"977\">\n<p data-start=\"947\" data-end=\"977\">Short \u2192 smooth pressure rise<\/p>\n<\/li>\n<li data-start=\"978\" data-end=\"1014\">\n<p data-start=\"980\" data-end=\"1014\">Long \u2192 sudden pressure explosion<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1016\" data-end=\"1105\">This is directly linked to <strong data-start=\"1043\" data-end=\"1060\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cetane-number-explained-why-51-is-critical\/\">cetane number<\/a><\/strong>. Lower cetane fuel increases ignition delay.<\/p>\n<p data-start=\"1107\" data-end=\"1243\">Under European regulation <strong data-start=\"1133\" data-end=\"1174\"><span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">EN 590<\/span><\/span><\/strong>, diesel must have a minimum <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cetane-number-explained-why-51-is-critical\/\">cetane number<\/a> of 51 to reduce this risk.<\/p>\n<hr data-start=\"1245\" data-end=\"1248\" \/>\n<h2 data-start=\"1250\" data-end=\"1277\">Why Diesel Knock Happens<\/h2>\n<p data-start=\"1279\" data-end=\"1317\">Several factors increase diesel knock:<\/p>\n<h3 data-start=\"1319\" data-end=\"1342\">1\ufe0f\u20e3 Low Cetane Fuel<\/h3>\n<p data-start=\"1343\" data-end=\"1407\">Longer ignition delay \u2192 more premixed fuel \u2192 violent combustion.<\/p>\n<h3 data-start=\"1409\" data-end=\"1428\">2\ufe0f\u20e3 Cold Engine<\/h3>\n<p data-start=\"1429\" data-end=\"1477\">Lower cylinder temperature delays auto-ignition.<\/p>\n<h3 data-start=\"1479\" data-end=\"1500\">3\ufe0f\u20e3 High Altitude<\/h3>\n<p data-start=\"1501\" data-end=\"1550\">Reduced air density affects combustion stability.<\/p>\n<h3 data-start=\"1552\" data-end=\"1577\">4\ufe0f\u20e3 Injector Problems<\/h3>\n<p data-start=\"1578\" data-end=\"1627\">Poor atomization causes uneven fuel distribution.<\/p>\n<h3 data-start=\"1629\" data-end=\"1663\">5\ufe0f\u20e3 Incorrect Injection Timing<\/h3>\n<p data-start=\"1664\" data-end=\"1716\">Too advanced <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-timing-belt-or-chain-interval-the-real-maintenance-guide\/\">timing<\/a> can increase pressure rise rate.<\/p>\n<hr data-start=\"1718\" data-end=\"1721\" \/>\n<h2 data-start=\"1723\" data-end=\"1761\">Pressure Rise and Mechanical Stress<\/h2>\n<p data-start=\"1763\" data-end=\"1831\">During normal combustion, cylinder pressure increases progressively.<\/p>\n<p data-start=\"1833\" data-end=\"1851\">With diesel knock:<\/p>\n<ul data-start=\"1853\" data-end=\"1962\">\n<li data-start=\"1853\" data-end=\"1882\">\n<p data-start=\"1855\" data-end=\"1882\">Pressure rises too quickly.<\/p>\n<\/li>\n<li data-start=\"1883\" data-end=\"1913\">\n<p data-start=\"1885\" data-end=\"1913\">Mechanical stress increases.<\/p>\n<\/li>\n<li data-start=\"1914\" data-end=\"1962\">\n<p data-start=\"1916\" data-end=\"1962\">Pistons and bearings experience shock loading.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1964\" data-end=\"1997\">Repeated knock can contribute to:<\/p>\n<ul data-start=\"1999\" data-end=\"2063\">\n<li data-start=\"1999\" data-end=\"2017\">\n<p data-start=\"2001\" data-end=\"2017\">Premature wear<\/p>\n<\/li>\n<li data-start=\"2018\" data-end=\"2039\">\n<p data-start=\"2020\" data-end=\"2039\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/p0016-code-timing-chain-or-sensor-fault\/\">Crankshaft<\/a> stress<\/p>\n<\/li>\n<li data-start=\"2040\" data-end=\"2063\">\n<p data-start=\"2042\" data-end=\"2063\">Increased vibration<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2065\" data-end=\"2136\">Modern ECUs actively adjust injection <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-timing-belt-or-chain-interval-the-real-maintenance-guide\/\">timing<\/a> to reduce knock intensity.<\/p>\n<hr data-start=\"2138\" data-end=\"2141\" \/>\n<h2 data-start=\"2143\" data-end=\"2176\">Diesel Knock vs Gasoline Knock<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2178\" data-end=\"2486\">\n<thead data-start=\"2178\" data-end=\"2211\">\n<tr data-start=\"2178\" data-end=\"2211\">\n<th class=\"\" data-start=\"2178\" data-end=\"2193\" data-col-size=\"sm\">Diesel Knock<\/th>\n<th class=\"\" data-start=\"2193\" data-end=\"2211\" data-col-size=\"sm\"><a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/do-gasoline-engines-have-injectors-full-technical-breakdown\/\">Gasoline<\/a> Knock<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2245\" data-end=\"2486\">\n<tr data-start=\"2245\" data-end=\"2312\">\n<td data-start=\"2245\" data-end=\"2272\" data-col-size=\"sm\">Caused by ignition delay<\/td>\n<td data-col-size=\"sm\" data-start=\"2272\" data-end=\"2312\">Caused by uncontrolled auto-ignition<\/td>\n<\/tr>\n<tr data-start=\"2313\" data-end=\"2360\">\n<td data-start=\"2313\" data-end=\"2336\" data-col-size=\"sm\">Linked to low cetane<\/td>\n<td data-col-size=\"sm\" data-start=\"2336\" data-end=\"2360\">Linked to low octane<\/td>\n<\/tr>\n<tr data-start=\"2361\" data-end=\"2440\">\n<td data-start=\"2361\" data-end=\"2403\" data-col-size=\"sm\">Happens in compression ignition engines<\/td>\n<td data-col-size=\"sm\" data-start=\"2403\" data-end=\"2440\">Happens in spark ignition engines<\/td>\n<\/tr>\n<tr data-start=\"2441\" data-end=\"2486\">\n<td data-start=\"2441\" data-end=\"2464\" data-col-size=\"sm\">Sharp metallic noise<\/td>\n<td data-col-size=\"sm\" data-start=\"2464\" data-end=\"2486\">Pinging \/ rattling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2488\" data-end=\"2521\">They are not the same phenomenon.<\/p>\n<hr data-start=\"2523\" data-end=\"2526\" \/>\n<h2 data-start=\"2528\" data-end=\"2567\">Modern Common Rail and Knock Control<\/h2>\n<p data-start=\"2569\" data-end=\"2605\">Common-rail systems reduce knock by:<\/p>\n<ul data-start=\"2607\" data-end=\"2745\">\n<li data-start=\"2607\" data-end=\"2654\">\n<p data-start=\"2609\" data-end=\"2654\">Pilot injection (small pre-injection event)<\/p>\n<\/li>\n<li data-start=\"2655\" data-end=\"2684\">\n<p data-start=\"2657\" data-end=\"2684\">Multiple injection events<\/p>\n<\/li>\n<li data-start=\"2685\" data-end=\"2713\">\n<p data-start=\"2687\" data-end=\"2713\">Precise injection <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-timing-belt-or-chain-interval-the-real-maintenance-guide\/\">timing<\/a><\/p>\n<\/li>\n<li data-start=\"2714\" data-end=\"2745\">\n<p data-start=\"2716\" data-end=\"2745\">Optimized spray atomization<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2747\" data-end=\"2830\">Pilot injection pre-burns a small amount of fuel to reduce the main pressure spike.<\/p>\n<p data-start=\"2832\" data-end=\"2860\">This significantly improves:<\/p>\n<ul data-start=\"2862\" data-end=\"2924\">\n<li data-start=\"2862\" data-end=\"2877\">\n<p data-start=\"2864\" data-end=\"2877\">Noise level<\/p>\n<\/li>\n<li data-start=\"2878\" data-end=\"2903\">\n<p data-start=\"2880\" data-end=\"2903\">Combustion smoothness<\/p>\n<\/li>\n<li data-start=\"2904\" data-end=\"2924\">\n<p data-start=\"2906\" data-end=\"2924\">Emission control<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2926\" data-end=\"2929\" \/>\n<h2 data-start=\"2931\" data-end=\"2960\">How to Reduce Diesel Knock<\/h2>\n<p data-start=\"2962\" data-end=\"2981\">Practical measures:<\/p>\n<ul data-start=\"2983\" data-end=\"3156\">\n<li data-start=\"2983\" data-end=\"3020\">\n<p data-start=\"2985\" data-end=\"3020\">Use quality diesel meeting EN 590<\/p>\n<\/li>\n<li data-start=\"3021\" data-end=\"3060\">\n<p data-start=\"3023\" data-end=\"3060\">Avoid very low cetane imported fuel<\/p>\n<\/li>\n<li data-start=\"3061\" data-end=\"3092\">\n<p data-start=\"3063\" data-end=\"3092\">Maintain <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/do-gasoline-engines-have-injectors-full-technical-breakdown\/\">injectors<\/a> properly<\/p>\n<\/li>\n<li data-start=\"3093\" data-end=\"3120\">\n<p data-start=\"3095\" data-end=\"3120\">Replace worn glow plugs<\/p>\n<\/li>\n<li data-start=\"3121\" data-end=\"3156\">\n<p data-start=\"3123\" data-end=\"3156\">Ensure correct injection <a href=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/%e2%9a%99%ef%b8%8f-timing-belt-or-chain-interval-the-real-maintenance-guide\/\">timing<\/a><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3158\" data-end=\"3231\">Fuel additives claiming large cetane increases should be used cautiously.<\/p>\n<hr data-start=\"3233\" data-end=\"3236\" \/>\n<h2 data-start=\"3238\" data-end=\"3254\">Key Takeaways<\/h2>\n<ul data-start=\"3256\" data-end=\"3515\">\n<li data-start=\"3256\" data-end=\"3309\">\n<p data-start=\"3258\" data-end=\"3309\">Diesel knock is caused by excessive ignition delay.<\/p>\n<\/li>\n<li data-start=\"3310\" data-end=\"3349\">\n<p data-start=\"3312\" data-end=\"3349\">Low cetane fuel increases knock risk.<\/p>\n<\/li>\n<li data-start=\"3350\" data-end=\"3395\">\n<p data-start=\"3352\" data-end=\"3395\">Rapid pressure rise creates metallic noise.<\/p>\n<\/li>\n<li data-start=\"3396\" data-end=\"3460\">\n<p data-start=\"3398\" data-end=\"3460\">Modern injection systems minimize knock using pilot injection.<\/p>\n<\/li>\n<li data-start=\"3461\" data-end=\"3515\">\n<p data-start=\"3463\" data-end=\"3515\">Fuel quality directly affects combustion smoothness.<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>What Is Diesel Knock? Diesel knock is the sharp metallic sound produced during abnormal combustion in a compression-ignition engine. Unlike gasoline knock (detonation), diesel knock is mainly caused by excessive ignition delay. It occurs when: Fuel is injected. Ignition is delayed. Too much fuel accumulates. Sudden combustion causes a rapid pressure spike. That pressure spike [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":39317,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[18606],"tags":[45323,45361,45357,45353,45359,45355],"class_list":["post-39316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-cetane-number","tag-common-rail-injection","tag-diesel-combustion","tag-diesel-knock","tag-fuel-quality-diesel","tag-ignition-delay-diesel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.2 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Diesel Knock Explained: The Real Cause - Diagnoza BAM<\/title>\n<meta name=\"description\" content=\"What causes diesel knock? 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Learn how ignition delay, cetane number and combustion pressure rise create diesel engine noise and long-term\" \/>\n<meta property=\"og:url\" content=\"https:\/\/diagnozabam.ro\/sfaturi\/blog\/diesel-knock-explained-the-real-cause\/\" \/>\n<meta property=\"og:site_name\" content=\"Diagnoza BAM\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/diagnozabam\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-19T22:58:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/damage-due-to-abnormal-combustion.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"713\" \/>\n\t<meta property=\"og:image:height\" content=\"690\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Bejenaru Alexandru Ionut\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scris de\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bejenaru Alexandru Ionut\" \/>\n\t<meta name=\"twitter:label2\" content=\"Timp estimat pentru citire\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/\"},\"author\":{\"name\":\"Bejenaru Alexandru Ionut\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#\\\/schema\\\/person\\\/77202adf825f4528d9ba9ab5b4ffafec\"},\"headline\":\"Diesel Knock Explained: The Real Cause\",\"datePublished\":\"2026-03-19T22:58:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/\"},\"wordCount\":393,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/damage-due-to-abnormal-combustion.webp\",\"keywords\":[\"cetane number\",\"Common Rail injection\",\"diesel combustion\",\"diesel knock\",\"fuel quality diesel\",\"ignition delay diesel\"],\"articleSection\":[\"News\"],\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/\",\"url\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/\",\"name\":\"Diesel Knock Explained: The Real Cause - Diagnoza BAM\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/blog\\\/diesel-knock-explained-the-real-cause\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/diagnozabam.ro\\\/sfaturi\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/damage-due-to-abnormal-combustion.webp\",\"datePublished\":\"2026-03-19T22:58:10+00:00\",\"description\":\"What causes diesel knock? 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Pilot injection is a small amount of fuel injected into the combustion chamber before the main injection event. Modern diesel engines no longer inject fuel in a single burst. 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Many drivers confuse cetane number (diesel) with octane rating (gasoline). They measure opposite combustion behaviors. Cetane number measures how easily diesel fuel auto-ignites. Octane rating measures how resistant gasoline is to auto-ignition. In short: Diesel needs fuel that ignites easily. 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For modern diesel engines \u2014 especially high-pressure common rail systems \u2014\u2026","rel":"","context":"\u00cen \u201eNews\u201d","block_context":{"text":"News","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/news\/"},"img":{"alt_text":"ce sa faci daca ai alimentat cu benzina in loc de motorina","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/05\/ce-sa-faci-daca-ai-alimentat-cu-benzina-in-loc-de-motorina.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/05\/ce-sa-faci-daca-ai-alimentat-cu-benzina-in-loc-de-motorina.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/05\/ce-sa-faci-daca-ai-alimentat-cu-benzina-in-loc-de-motorina.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/05\/ce-sa-faci-daca-ai-alimentat-cu-benzina-in-loc-de-motorina.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2024\/05\/ce-sa-faci-daca-ai-alimentat-cu-benzina-in-loc-de-motorina.webp?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":39310,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/cetane-number-explained-why-51-is-critical\/","url_meta":{"origin":39316,"position":4},"title":"Cetane Number Explained: Why 51 Is Critical","author":"Bejenaru Alexandru Ionut","date":"19 martie 2026","format":false,"excerpt":"The cetane number (CN) measures the auto-ignition quality of diesel fuel used in compression-ignition engines. It indicates how quickly the fuel ignites after being injected into the combustion chamber. In simple terms: Higher cetane number \u2192 shorter ignition delay Lower cetane number \u2192 longer ignition delay Ignition delay is the\u2026","rel":"","context":"\u00cen \u201eNews\u201d","block_context":{"text":"News","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/news\/"},"img":{"alt_text":"Close up of fuel injectors and common rail in a diesel engine","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/02\/close-up-of-fuel-injectors-and-common-rail-in-a-diesel-engine.webp?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":39329,"url":"https:\/\/diagnozabam.ro\/sfaturi\/blog\/combustion-phasing-in-diesel-engines\/","url_meta":{"origin":39316,"position":5},"title":"Combustion Phasing in Diesel Engines","author":"Bejenaru Alexandru Ionut","date":"21 martie 2026","format":false,"excerpt":"What Is Combustion Phasing? Combustion phasing refers to the exact crankshaft angle at which peak cylinder pressure occurs during combustion. In simple terms: It defines when the maximum pressure happens relative to Top Dead Center (TDC). For optimal efficiency in diesel engines, peak pressure should occur slightly after TDC, not\u2026","rel":"","context":"\u00cen \u201eNews\u201d","block_context":{"text":"News","link":"https:\/\/diagnozabam.ro\/sfaturi\/category\/news\/"},"img":{"alt_text":"sustainability 14 15902 g001","src":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/diagnozabam.ro\/sfaturi\/wp-content\/uploads\/2026\/03\/sustainability-14-15902-g001-scaled.webp?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pf97go-ae8","jetpack_sharing_enabled":true,"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/comments?post=39316"}],"version-history":[{"count":1,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39316\/revisions"}],"predecessor-version":[{"id":39318,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/posts\/39316\/revisions\/39318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/media\/39317"}],"wp:attachment":[{"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/media?parent=39316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/categories?post=39316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diagnozabam.ro\/sfaturi\/wp-json\/wp\/v2\/tags?post=39316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}