Practical Diesel-Engine Combustion Analysis

Hsu, B. D.

doi:10.4271/r-327

Cited by 48 publications

(19 citation statements)

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“…at the EVC, the predicted trend qualitatively coincides well with the published results of in-cylinder NO x traces, e.g. [38,41], which also indicate non-negligible NO x formation during the premixed burning period. This confirms meaningfulness of keeping RAFC above value 1.0 during the initial combustion phase, which ensures surplus of oxygen in the burned zone being required for NO x formation.…”

Section: Thermodynamic Model Resultssupporting

confidence: 80%

“…In contrast to some approaches where air-fuel ratio in the flame front is assumed to be <1 [37], in this model RAFC was kept above 1.0 during the initial combustion phase. This is aligned with the main focus of the model being NO x formation, as at least some surplus of oxygen in the burned zone is required to allow for NO x formation during the initial and thus also premixed combustion phase, which is indeed characterized by NO x formation [38]. After EOI, RAFC is linearly increasing thereby leaning burned gases.…”

Section: Determination Of Rafcmentioning

confidence: 59%

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Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Vihar

Baškovič

Katrašnik

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Abstract. This paper presents a control-oriented thermodynamic model capable of predicting nitrogen oxides (NO x ) emissions in diesel engines. It is derived from zero-dimensional combustion model using in-cylinder pressure as the input. The methodology is based on a two-zone thermodynamic model which divides the combustion chamber into a burned and unburned gas zone. The original contribution of proposed method arises from: (1) application of a detailed two-zone modeling framework, developed in a way that the thermodynamic equations could be solved in a closed form without iterative procedure, which provides the basis for achieving high level of predictiveness, on the level of real-time capable models and (2) introduction of relative air-fuel ratio during combustion as a main and physically motivated calibration parameter of the NO x model. The model was calibrated and validated using data sets recorded in two different direct injection diesel engines, i.e. a light and a heavy-duty engine. The model is suitable for real-time applications since it takes less than a cycle to complete the entire closed cycle thermodynamic calculation including NO x prediction, which opens the possibility of integration in the engine control unit for closed-loop or feed-forward control.

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Section: Thermodynamic Model Resultssupporting

confidence: 80%

Section: Determination Of Rafcmentioning

confidence: 59%

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Vihar

Baškovič

Katrašnik

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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“…∆Q is the heat released during a crankshaft rotation ∆θ. The application of the first thermodynamics law to the cylinder gas, assuming complete combustion and neglecting the variation of mass due to fuel injection [25,26], allows us to identify the three terms of Equation (7). The first is related to the measured level of in-cylinder pressure, multiplied for the corresponding variation of instantaneous cylinder volume (computed from the measured crank angle and engine geometry characteristics).…”

Section: Measurement Of In-cylinder Pressure Diagrams and Calculationmentioning

confidence: 99%

Influence of Fuel Injection, Turbocharging and EGR Systems Control on Combustion Parameters in an Automotive Diesel Engine

Zamboni

2019

Applied Sciences

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Indicated pressure diagrams were measured during experimental campaigns on the control of fuel injection, turbocharging and hybrid exhaust gas recirculation systems in an automotive downsized diesel engine. Three-part load operating conditions were selected for four test sets, where strategies aimed at the reduction of NOX emissions and fuel consumption, limiting penalties in soot emissions and combustion noise were applied to the selected systems. Processing of in-cylinder pressure signal, its first derivative and curves of the rate of heat release allowed us to evaluate seven parameters related to the combustion centre and duration, maximum values of pressure, heat release and its first derivative, heat released in the premixed phase and a combustion noise indicator. Relationships between these quantities and engine operating, energy and environmental parameters were then obtained by referring to the four test sets. In the paper, the most significant links are presented and discussed, aiming at a better understanding of the influence of control variables on the combustion process and the effects on engine behaviour. The proposed methodology proved to be a consistent tool for this analysis, useful for supporting the application of alternative fuels or advanced combustion modes.

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“…Pentingnya kesesuaian karakteristik bahan bakar alternatif sebagai suplemen pada solar dikarenakan pada akhirnya proses pembakaranlah yang akan memegang peranan terhadap unjuk kerja maupun pembentukan emisi pada motor diesel. Proses pembakaran pada motor diesel merupakan sebuah proses yang kompleks, dimulai sejak bahan bakar itu diinjeksikan ke dalam ruang bakar sampai pada proses pembuangan gas buang sisa pembakaran [2]. Parameter yang sangat mempengaruhi proses pembakaran pada motor diesel di antaranya adalah kehomogenan campuran bahan bakar dengan udara, waktu injeksi bahan bakar, dan karakteristik bahan bakar seperti volalitas, bilangan setana, auto ignition temperature, flash point, tingkat penguapan dan lain sebagainya [3][4][5].…”

Section: Pendahuluanunclassified

The Effect of Ethanol-Diesel Blends on The Performance of A Direct Injection Diesel Engine

Nur¹,

Putrasari

Reksowardojo

2012

J. Mechatron. Electr. Power Veh. Technol.

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The experiment was conducted on a conventional direct injection diesel engine. Performance test was carried out to evaluate the performance and emission characteristics of a conventional diesel engine that operates on ethanol-diesel blends. The test procedure was performed by coupling the diesel engine on the eddy current dynamometer. Fuel consumption was measured using the AVL Fuel Balance, and a hotwire anemometer was used to measure the air consumption. Some of the emission test devices were mounted on the exhaust pipe. The test of fuel variations started from 100% diesel fuel (D100) to 2.5% (DE2.5), 5% (DE5), 7.5% (DE7.5), and 10% (DE10) ethanol additions. Performance test was conducted at 1500 rpm with load variations from 0 to 60 Nm by increasing the load on each level by 10 Nm. The addition of 5% ethanol to diesel (DE5) increased the average pressure of combustion chamber indication to 48% as well as reduced the specific fuel consumption to 9.5%. There were better exhaust emission characteristics at this mixture ratio than diesel engine which used pure diesel fuel (D100), the reduction of CO to 37%, HC to 44% and opacity to 15.9%.Key words: performance test, fuel supplement, bioethanol, emission, diesel engine. Kata kunci: uji prestasi, pencampur solar, etanol, emisi, motor diesel. Abstrak Eksperimen dilakukan pada motor diesel dengan sistem injeksi langsung (direct injection). Uji prestasi ini dilakukan guna melihat karakteristik prestasi dan emisi motor diesel konvensional terhadap penambahan etanol sebagai bahan bakar suplemen pada solar. Uji prestasi dilakukan dengan menempatkan motor uji pada perangkat

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Practical Diesel-Engine Combustion Analysis

Cited by 48 publications

References 0 publications

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Influence of Fuel Injection, Turbocharging and EGR Systems Control on Combustion Parameters in an Automotive Diesel Engine

The Effect of Ethanol-Diesel Blends on The Performance of A Direct Injection Diesel Engine

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Practical Diesel-Engine Combustion Analysis

Cited by 48 publications

References 0 publications

Real-time capable virtual NOx sensor for diesel engines based on a two-Zone thermodynamic model

Real-time capable virtual NOx sensor for diesel engines based on a two-Zone thermodynamic model

Influence of Fuel Injection, Turbocharging and EGR Systems Control on Combustion Parameters in an Automotive Diesel Engine

The Effect of Ethanol-Diesel Blends on The Performance of A Direct Injection Diesel Engine

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Product

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Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model

Real-time capable virtual NO_x sensor for diesel engines based on a two-Zone thermodynamic model