Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine

In the diesel engine Exhaust Gas Recirculation (EGR) components, valve and connecting pipes are the critical components and fails often during new engine development. These components are important for meeting NOx emissions norms. Therefore design of these components should remain robust. But the ch...

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Main Author: Karthikeyan Subramanian
Format: Article
Language:English
Published: Islamic Azad University-Isfahan (Khorasgan) Branch 2014-03-01
Series:International Journal of Advanced Design and Manufacturing Technology
Online Access:https://admt.isfahan.iau.ir/article_534868_7dd289ee682912aacd51cbf333859040.pdf
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author Karthikeyan Subramanian
author_facet Karthikeyan Subramanian
author_sort Karthikeyan Subramanian
collection DOAJ
description In the diesel engine Exhaust Gas Recirculation (EGR) components, valve and connecting pipes are the critical components and fails often during new engine development. These components are important for meeting NOx emissions norms. Therefore design of these components should remain robust. But the challenge in design is compact packaging of complete EGR components on the engine consequently vibration related failure plays a major role. Normally in pneumatic EGR valve, shaft spring stiffness plays a major role for shaft opening and closing. But in this layout during emission testing, shaft is self-opened without feedback signal from sensor this is due to resonance and this problem is solved by increasing the spring stiffness. The next key components is the EGR pipes, the flexible bellows on these pipes are useful for thermal expansion during hot conditions. In this case the bellow crack failure is observed due to vibration. Therefore design improvements were made by proper design of bellow geometry and bracket support for these pipes facilitated prevention of EGR pipe failure. Overall this paper describes the methodology to conduct proper failure investigation to identify the root cause for vibration related failures of EGR system during new product development.
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spelling doaj.art-4fccd9d86a8d410eac3d10b9770eef962023-10-18T09:36:41ZengIslamic Azad University-Isfahan (Khorasgan) BranchInternational Journal of Advanced Design and Manufacturing Technology2252-04062383-44472014-03-0171534868Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel EngineKarthikeyan Subramanian0Manager- Engine Product Development Ashokleyland- Technical Center- Vellivoiyal chavadi (near New Manali Town) Chennai Tamil Nadu, IndiaIn the diesel engine Exhaust Gas Recirculation (EGR) components, valve and connecting pipes are the critical components and fails often during new engine development. These components are important for meeting NOx emissions norms. Therefore design of these components should remain robust. But the challenge in design is compact packaging of complete EGR components on the engine consequently vibration related failure plays a major role. Normally in pneumatic EGR valve, shaft spring stiffness plays a major role for shaft opening and closing. But in this layout during emission testing, shaft is self-opened without feedback signal from sensor this is due to resonance and this problem is solved by increasing the spring stiffness. The next key components is the EGR pipes, the flexible bellows on these pipes are useful for thermal expansion during hot conditions. In this case the bellow crack failure is observed due to vibration. Therefore design improvements were made by proper design of bellow geometry and bracket support for these pipes facilitated prevention of EGR pipe failure. Overall this paper describes the methodology to conduct proper failure investigation to identify the root cause for vibration related failures of EGR system during new product development.https://admt.isfahan.iau.ir/article_534868_7dd289ee682912aacd51cbf333859040.pdf
spellingShingle Karthikeyan Subramanian
Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
International Journal of Advanced Design and Manufacturing Technology
title Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
title_full Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
title_fullStr Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
title_full_unstemmed Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
title_short Design Enhancement of EGR System for Improved Vibration Performance on Truck Diesel Engine
title_sort design enhancement of egr system for improved vibration performance on truck diesel engine
url https://admt.isfahan.iau.ir/article_534868_7dd289ee682912aacd51cbf333859040.pdf
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