Application of the Miller cycle and turbo charging into a diesel engine to improve performance and decrease NO emissions

Gonca, Güven; Şahi̇n, Bahri̇; Parlak, Adnan; Ayhan, Vezir; Cesur, İdris; Köksal, Sakıp

doi:10.1016/j.energy.2015.08.032

Cited by 64 publications

(15 citation statements)

References 28 publications

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“…The main disadvantage of this method is that it implies a worsening of engine performance. Recent studies suggest to combine the Miller cycle with turbocharging in order to improve the engine performance and control NOx emissions [11].…”

Section: Introductionmentioning

confidence: 99%

Combustion noise analysis of partially premixed combustion concept using gasoline fuel in a 2-stroke engine

Broatch

Margot

Novella

et al. 2016

Energy

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ElsevierBroatch Jacobi, JA.; Margot, X.; Novella Rosa, R.; Gómez-Soriano, J. (2016). Combustion noise analysis of partially premixed combustion concept using gasoline fuel in a 2-stroke engine. Energy. 107:612-624. AbstractIn the last decade, different advanced combustion concepts based on generating totally or partially premixed conditions have been investigated in CI engines with the aim of achieving lower NOx and soot emissions. Most of the drawbacks inherent to this type of combustions, such as the combustion phasing control or combustion stability, can be mitigated by combining the PPC concept fueled by gasoline and a small 2-stroke HSDI engine. However, combustion noise issue remains unsolved while it is a critical aspect due to its strong influence in the customer purchasing decision and compliance of more stringent regulations. In this work, an analysis of the combustion noise generated by PPC combustion concept is performed in order to identify the most influential parameters and to define key paths for controlling the noise level. In addition, 3D CFD simulations have been performed to further understand the combustion noise generation mechanisms. Results evidence how the strong impact of the maximum pressure time-derivative achieved during combustion process renders all other sources of noise generation irrelevant. The trade-off between combustion noise and combustion efficiency of this PPC concept has been confirmed, while the intrinsic relation between such parameters and the engine efficiency has been also evaluated.

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Section: Introductionmentioning

confidence: 99%

Combustion noise analysis of partially premixed combustion concept using gasoline fuel in a 2-stroke engine

Broatch

Margot

Novella

et al. 2016

Energy

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“…The results showed that NO emissions decreased without considerable power loss. Gonca et al [53] experimentally and theoretically investigated the effects turbo charging on the engine performance and emissions. Gonca and Sahin [54] examined the effects of the MC on the performance of a steam injected and turbocharged diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Comparative performance analyses of irreversible OMCE (Otto Miller cycle engine)-DiMCE (Diesel miller cycle engine)-DMCE (Dual Miller cycle engine)

Gonca

2016

Energy

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“…Gonca 24 carried out performance comparisons between the diesel-Otto-dual MC engines. Gonca 25 and Gonca et al [26][27][28][29][30][31][32][33][34] performed a series of theoretical and empirical works on the emission characteristics, performance simulation, and analysis of the diesel engines, which have different configurations and operating modes including MC diesel engine, 32 turbocharged MC diesel engine, 33 and turbocharged MC diesel engine with steam injection. 34 Zhou et al 35 realized the MC with late exhaust valve closing method and abated NO x emissions significantly without changing of fuel injection direction; however, fuel economy deteriorated.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a novel eco‐friendly internal combustion engine cycle

Gonca

Şahi̇n

2019

Int J Energy Res

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Summary The Miller cycle applications have been performed to diminish NOx released from internal combustion engines (ICEs), in recent years. The Miller cycle provides decreased compression ratio and enhanced expansion ratio; hereby, maximum in‐cylinder combustion temperatures diminish, and NOx formations slow down remarkably. Another less‐known method is Takemura cycle application, which provides heat addition into engine cylinder at constant combustion temperatures. In this study, a novel cycle including the Miller cycle and the Takemura cycle has been developed by using novel numerical models and computing methods with seven processes and a novel way to decrease NOx emissions at higher levels compared with the single applications of known cycles. A comprehensive performance examination of the proposed cycle engine in terms of performance characteristics such as effective power (EFP), effective power density (EFPD), exergy destruction (X), exergy efficiency (ε), and ecological coefficient of performance (ECOP) has been conducted. The impacts of engine operating and design parameters on the performance characteristics have been computationally examined. Furthermore, irreversibilities depending on incomplete combustion loss (INCL), exhaust output loss (EXOL), heat transfer loss (HTRL), and friction loss (FRL) have been considered in the performance simulations. The minimum exergy destruction and maximum performance specifications have been observed with 30 of the compression ratio. Maximum effective power values have been obtained at range between 1 and 1.2 of equivalence ratio. The optimum range for exergy efficiency is between 0.8 and 1 of equivalence ratio. Increasing engine speed has provided enhancing effective power. However, an optimum range has been found for the exergy efficiency that is interval of 3000 to 4000 rpm. The results obtained can be assessed by researchers studying on modeling of the engine systems and designs.

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Application of the Miller cycle and turbo charging into a diesel engine to improve performance and decrease NO emissions

Cited by 64 publications

References 28 publications

Combustion noise analysis of partially premixed combustion concept using gasoline fuel in a 2-stroke engine

Combustion noise analysis of partially premixed combustion concept using gasoline fuel in a 2-stroke engine

Comparative performance analyses of irreversible OMCE (Otto Miller cycle engine)-DiMCE (Diesel miller cycle engine)-DMCE (Dual Miller cycle engine)

Performance analysis of a novel eco‐friendly internal combustion engine cycle

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