Analysis of benefits of using internal exhaust gas recirculation in biogas-fueled HCCI engines

Kozarac, Darko; Vuilleumier, David; Saxena, Samveg; Dibble, Robert W.

doi:10.1016/j.enconman.2014.04.085

Cited by 43 publications

(31 citation statements)

References 17 publications

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“…The second method is retaining the exhaust gas by varying the exhaust valve opening (EVO) time. This method is called as internal EGR [37,39]. Generally, closing the exhaust valve earlier leads to increasing the percentage of exhaust gas retained inside the cylinder.…”

Section: Exhaust Gas Recirculationmentioning

confidence: 99%

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2022

Int. J. Automot. Mech. Eng.

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Compression ignition (CI) engines are used in heavy duty engine applications due to their high torque capability and thermal efficiency. However, high NOx and smoke emissions are the challenges in using CI engines. Homogeneous charge compression ignition (HCCI) is one of the best methods to reduce NOx and smoke emissions. However, controlling the combustion for an entire range of operation in HCCI mode is a challenging task. Different methods like fast thermal management (FTM), exhaust gas recirculation (EGR), turbo charging and reactivity controlled compression ignition (RCCI) are reviewed and discussed in this article. RCCI is similar to HCCI, which uses reactivities of two different fuels to control combustion. The combustion objectives of HCCI such as less NOx and soot emission can also be obtained through this method. Combustion control based on reactivities of various fuels (RCCI) is discussed significantly. Fuels that have different reactivities can help to control the combustion phasing and thereby reducing the emission. Two different fuels can be injected together into the manifold or one fuel can be injected in the port and other in the combustion chamber directly for reactivity based combustion control. The technological development in different combustion control methods is reviewed and discussed in this article which is a useful knowledge base for further research investigations. When compared to other combustion control methods, RCCI is found to be advantageous in all perspectives such as cost, flexibility in control, simplicity and wide range of operation.

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Section: Exhaust Gas Recirculationmentioning

confidence: 99%

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2022

Int. J. Automot. Mech. Eng.

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“…The European Union promotes usage of different fuels for powering transportation vehicles [2]. Therefore, in order to remain the most used vehicle powering system, diesel engines must meet higher efficiency standards which can be achieved through their constant development [3]. Modern development methods combine experimental research with Computational Fluid Dynamics (CFD) tools which offer a costeffective approach.…”

Section: Introductionmentioning

confidence: 99%

Modelling of spray and combustion processes by using the Eulerian multiphase approach and detailed chemical kinetics

Petranović

Edelbauer

Vujanović

et al. 2017

Fuel

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This research deals with computational modelling of non-reactive and reactive turbulent spray processes. The spray process is modelled using the Euler Eulerian multiphase approach together with a size-of-classes model where the discrete phase is considered as continuum and divided into sub-classes. The combustion process is modelled by taking into account chemical kinetics and solving homogeneous gas phase reactions. The combustion model is implemented into a commercial computational fluid dynamics code, and used in combination with previously validated spray sub-models. Several non-reactive cases are modelled by comparing the fuel spatial and temporal development to the available experimental data. The modelled results show excellent agreement for fuel penetration and mixture distributions. Furthermore, the developed method is validated by modelling reactive spray processes within constant volume vessel, and by comparing results to the Engine combustion network experimental data. The vessel conditions correspond well to diesel-like conditions in terms of gas residuals, pressure and temperature. Finally, the given results show a good agreement for the lift-off length and the ignition delay trends compared to the experimental data, but a slight discrepancy in the combustion process occurrence is observed.

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“…It was also found that HCCI operating range was extended at the low load boundary. Kozarac et al [30] analyzed the effects of internal EGR in HCCI engine fueled with biogas. The test results showed that cylinder temperature increased when the greater negative valve overlap was used to increase combustion products.…”

Section: Introductionmentioning

confidence: 99%