{"id":7441,"date":"2026-01-01T19:00:02","date_gmt":"2026-01-01T19:00:02","guid":{"rendered":"https:\/\/systec-automotive.de\/?p=7441"},"modified":"2026-01-19T19:36:58","modified_gmt":"2026-01-19T19:36:58","slug":"challenges-solutions-engine-flow-measurement","status":"publish","type":"post","link":"https:\/\/systec-automotive.de\/en\/challenges-solutions-engine-flow-measurement\/","title":{"rendered":"Challenges and solutions in engine flow measurement"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7441\" class=\"elementor elementor-7441\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-baa3ab0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"baa3ab0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5df09bf\" data-id=\"5df09bf\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4e077b6 elementor-widget elementor-widget-text-editor\" data-id=\"4e077b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Why is flow measurement on engines so complex?<\/h2><h3>Dynamic and thermal influences on flow measurement in engines<\/h3><p>Flow measurement in engines is one of the most challenging tasks in measurement technology. Hardly any other measuring point is influenced as much by changing operating conditions, vibrations, temperature and pressure fluctuations as the engine compartment of a commercial vehicle, be it a lorry or a construction machine. Those who require precise and stable measurements in this environment depend on robust sensor technology and stable solutions for signal evaluation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-656c209 elementor-widget elementor-widget-spacer\" data-id=\"656c209\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ad98cd3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ad98cd3\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-e8f99ef\" data-id=\"e8f99ef\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4982bec elementor-widget elementor-widget-text-editor\" data-id=\"4982bec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>1. Uneven gas flow<\/h3><p>Flows in the intake or exhaust tract are rarely uniform. Pulsations caused by engine operation, valve openings or turbochargers lead to highly fluctuating volume flows. This dynamic makes it difficult to calculate an exact average value, requiring sensors for gas flow measurement that deliver stable results even under dynamic conditions.<\/p><h3>2. Vibrations and mechanical stress<\/h3><p>Engine vibrations directly affect the measuring elements. Without suitable damping and signal processing, this can result in noise or inaccurate readings. A solid mechanical design and intelligent signal analysis are therefore crucial.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d6025b2 elementor-widget elementor-widget-spacer\" data-id=\"d6025b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-4e0eeb7\" data-id=\"4e0eeb7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a9dbd25 elementor-widget elementor-widget-image\" data-id=\"a9dbd25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Abgas_PEMS_systec_Automotive_768x768-300x300.jpg\" class=\"attachment-medium size-medium wp-image-5515\" alt=\"Auspuff eines Fahrzeugs mit Abgas, Emission, PEMS\" srcset=\"https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Abgas_PEMS_systec_Automotive_768x768-300x300.jpg 300w, https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Abgas_PEMS_systec_Automotive_768x768-150x150.jpg 150w, https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Abgas_PEMS_systec_Automotive_768x768.jpg 768w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5f4cfeb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5f4cfeb\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-e741427\" data-id=\"e741427\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ef86e98 elementor-widget elementor-widget-image\" data-id=\"ef86e98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Strasse-systec-Automotive-768x768-1-300x300.jpg\" class=\"attachment-medium size-medium wp-image-5520\" alt=\"Strasse zum Horizont unter blauem Himmel, systec Automotive\" srcset=\"https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Strasse-systec-Automotive-768x768-1-300x300.jpg 300w, https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Strasse-systec-Automotive-768x768-1-150x150.jpg 150w, https:\/\/systec-automotive.de\/wp-content\/uploads\/2024\/02\/Strasse-systec-Automotive-768x768-1.jpg 768w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-ee29d85\" data-id=\"ee29d85\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f6be176 elementor-widget elementor-widget-text-editor\" data-id=\"f6be176\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>3. Dirt, condensate and particles<\/h3><p>Exhaust gas measurements are often impaired by soot, oil mist or condensate. These deposits can alter flow conditions or block measuring openings. Low-maintenance systems with a self-cleaning effect or an adapted probe shape minimise this influence.<\/p><h3>4. Limited installation space and short inlet sections<\/h3><p>Space is at a premium in the engine compartment. Flow measurement sensors on the engine often have to be mounted directly after bends, valves or turbochargers, where the flow profile is severely disturbed. In these cases, the correct inflow angle and optimal positioning of the probe are crucial.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b42cf3 elementor-widget elementor-widget-spacer\" data-id=\"9b42cf3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-03c0418 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"03c0418\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c59823c\" data-id=\"c59823c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4051310 elementor-widget elementor-widget-text-editor\" data-id=\"4051310\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Influence of temperature and pressure fluctuations on measurement results<\/h2><h3>Compensation and density correction of gas flow measurement under variable engine conditions<\/h3><p>Hardly any other measurement task is so strongly influenced by thermodynamic changes. When measuring flow at the engine, pressure and temperature fluctuate constantly depending on the load. These changes directly affect the density of the medium and therefore the calculated mass flow.<\/p><p>Systems developed specifically for this purpose compensate for these influences through integrated pressure and temperature measurements, delivering accurate, density-compensated values even under highly fluctuating conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7603d1 elementor-widget elementor-widget-spacer\" data-id=\"d7603d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6383599 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6383599\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-607ef05\" data-id=\"607ef05\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d1174b6 elementor-widget elementor-widget-text-editor\" data-id=\"d1174b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Signal stabilisation and data processing in differential pressure measurement on the engine<\/h2><p>A key issue in engine flow measurement is processing the differential pressure signal.<\/p><p>Differential pressure measurement (DP measurement) has proven to be particularly robust and reliable. It enables precise measurements even at high temperatures and with pulsating gas flows, and is also low-maintenance.<\/p><p>To stabilise the signal, modern dp systems use digital filters, moving averages and adaptive algorithms. This ensures that the signal remains evaluable even in the presence of high noise levels and delivers reproducible results.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-294b482 elementor-widget elementor-widget-spacer\" data-id=\"294b482\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b45a38d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b45a38d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4314b7c\" data-id=\"4314b7c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-652cf1e elementor-widget elementor-widget-heading\" data-id=\"652cf1e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion: Precise flow measurement on the engine requires an understanding of the system.<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0a6be7b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0a6be7b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b3600da\" data-id=\"b3600da\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-111ceef elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"111ceef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"far fa-lightbulb\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-bca3e3e\" data-id=\"bca3e3e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f5174e9 elementor-widget elementor-widget-text-editor\" data-id=\"f5174e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Flow measurement on the engine requires more than just installing a sensor. The influence of pressure and temperature on flow measurement is particularly relevant here. The following factors are crucial for precise measurement results:<\/p><ul><li>correct positioning in the flow path<\/li><li>physical compensation for pressure and temperature<\/li><li>robust signal processing<\/li><li>a sensor architecture that can withstand vibrations and contamination.<\/li><\/ul><p>It is only through the interaction of these factors that reliable, dynamically correct measured values can be achieved, both on the test bench and in real driving conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Why is flow measurement on engines so complex? Dynamic and thermal influences on flow measurement in engines Flow measurement in engines is one of the most challenging tasks in measurement technology. Hardly any other measuring point is influenced as much by changing operating conditions, vibrations, temperature and pressure fluctuations as the engine compartment of a&hellip;<\/p>\n","protected":false},"author":15,"featured_media":5296,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wp_rev_ctl_limit":""},"categories":[50],"tags":[51],"class_list":["post-7441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-engine-flow-measurement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Challenges and solutions in engine flow measurement - Systec Automotive<\/title>\n<meta name=\"description\" content=\"Flow measurement in engines is one of the most challenging tasks in measurement technology. 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