Numerical Analysis of Influence of EGR on combustion of Biogas fuelled HCCI engines and the Possibility to Use EGR for reducing the High Intake Temperature Requirements

Kozarac, Darko and Vuilleumier, David and Saxena, Samveg and Dibble, Robert (2013) Numerical Analysis of Influence of EGR on combustion of Biogas fuelled HCCI engines and the Possibility to Use EGR for reducing the High Intake Temperature Requirements. = Numerical Analysis of Influence of EGR on combustion of Biogas fuelled HCCI engines and the Possibility to Use EGR for reducing the High Intake Temperature Requirements. In: 8th Conference on Sustainable Development of Energy, Water and Environment Systems, 22-27. 09. 2013., Dubrovnik, Hrvatska.

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Official URL: http://bib.irb.hr/prikazi-rad?rad=666539

Abstract

Numerical study that analyzed the influence of combustion products (CP) concentration on the combustion characteristics (combustion timing and combustion duration) of a biogas fuelled HCCI engine was made. The purpose of the study was to investigate the possibility of using internal exhaust gas recirculation (EGR) enabled by negative valve overlap (NVO) for reducing the high intake temperature requirement observed in biogas fuelled HCCI engines. The analysis used a validated engine model made in AVL Boost. The results showed that when CP’s are increased the required intake temperature for the same combustion timing must be increased. When NVO is used the cylinder temperature does increase, but the influence of CP almost entirely counteracts this effect. Additionally, it has been observed that with larger fractions of CP some instability of combustion in the calculation was obtained which indicates that the increase of EGR might produce some combustion instability.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Biogas, HCCI, Negative valve overlap, Internal EGR, Simulation
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 400 Department of IC Engines and Mechanical Handling Equipment > 410 Chair of IC Engines and Motor Vehicles
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 20 Apr 2016 10:24
Last Modified: 03 Mar 2017 12:27
URI: http://repozitorij.fsb.hr/id/eprint/5699

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