Modeling of a bioethanol combustion engine under different operating conditions

Hedfi, Hachem; Jedli, Hedi; Jbara, Abdessalem; Slimi, Khalifa

doi:10.1016/j.enconman.2014.09.035

Cited by 15 publications

(5 citation statements)

References 36 publications

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“…An encoder autonics (6) and sensor for temperature (7) were mounted on the flywheel (5) and the engine (4), respectively. The fuel travels to the fuel filter (10) from the fuel tank (8) and then to the fuel pump (9), where it is injected into the fuel injectors (11). The box to filter the air (15) and the throttle allow air to enter the intake pipe (16).…”

Section: Experiments Setupmentioning

confidence: 99%

“…Under a variety of operating conditions, characteristics of burning rates are analyzed to clarify the initiation, propagation, and termination of the flame. Hedfi et al studied bioethanol combustion and discovered that retarded spark timing leads to higher temperature and pressure of the gas mixture in the cylinder [9]. The optimal injection and ignition timing for a methanol engine was investigated by Li et al They discovered that these timings had a major impact on methanol engine combustion and exhaust emissions [10].…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Effect of Ignition Timing on Residual Gas, Effective Release Energy, and Engine Emissions of a V-Twin Engine

Yhcmute

Khoa

2021

Energies

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The ignition timing of an SI engine is a critical parameter. The influence on residual gas, effective release energy, and emissions characteristics of ignition timing for the V-twin engine is investigated in this research. For this purpose, an experiment system was built with a dynamometer, and a model of the simulation was created. In this research, the ignition timing was varied from 10 to 45 degrees BTDC under full load operating conditions, with engine speeds ranging from 3000 to 10,000 rpm. Based on the output data, ignition timing has a major impact on the proportion of residual gas, efficient release energy, performance of the engine, and the emission characteristics. The smallest proportion of residual gas was 0.07% at 8000 rpm and ignition timing of 10 °CA. At 15 °CA of ignition timing, the highest efficient release energy was 0.817 kJ at 4000 rpm, while at 8000 rpm and 25 °CA of ignition timing, it was 0.8305 kJ. At 6000 rpm, the greatest braking torque of the engine was 21.57 Nm, while the minimal BSFC was 343.821 g/kWh. The nitrogen oxide emission and HC emission increase with the advanced ignition timing, but CO emission decreases.

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Section: Experiments Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Study on the Effect of Ignition Timing on Residual Gas, Effective Release Energy, and Engine Emissions of a V-Twin Engine

Yhcmute

Khoa

2021

Energies

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“…Based on the model, the combination of control parameters can be obtained by using various optimization algorithm. 6,7 To further reduce the calibration workload, engine online calibration method is proposed. On-line calibration method can be divided into two categories: model-based and non-model-based.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the model, the combination of control parameters can be obtained by using various optimization algorithm. 6,7…”

Section: Introductionmentioning

confidence: 99%

Study on momentum gradient descent on-line engine calibration algorithm combined with search space division

Huang,

Wang,

2023

International Journal of Engine Research

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Because of the control problem complexity, engine calibration becomes a multi-object nonconvex optimization problem (MONCOP). To solve this problem and shorten the calibration time, this study proposes an innovative on-line engine calibration algorithm which combines momentum gradient descent algorithm with search space division (MGD-SSD). Firstly, taking a two-stroke kerosene engine as the research object, the engine response model is built by support vector machine (SVM), and based on the analysis of the spark timing and air-to-fuel ratio calibration problem, MAPs of objective function value under three typical engine operation conditions are established. Then the design of MGD-SSD is introduced in detail. The search space division is used to find the appropriate initial point quickly and the momentum gradient descent algorithm is used to quickly find the global best point through the appropriate initial point. A comparative study on three methods including genetic algorithm (GA), genetic and gradient descent hybrid algorithm (GGD) and MGD-SSD is carried out through benchmark function test and virtual calibration test. All tests show that the MGD-SSD is able to find the global optimal solution with higher accuracy and fewer iterations. Finally, the bench test of MGD is carried out, and the validity of the algorithm is verified.

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“…That is why important growth of numerical techniques and computer capacities pushed the researchers to develop an efficient numerical approach in order to gain an accurate knowledge of the aerodynamic phenomena within the combustion chamber. In fact, there are different commercial codes such as ANSYS Fluent, Star-CD, and KIVA, or the specific codes based on C++, MATLAB and FORTRAN (Hedfi et al 2014(Hedfi et al , 2016. Computational Fluid Dynamics (CFD) is an efficient tool for the engine simulation which has the advantage to reduce the cost and speed time.…”

Section: Introductionmentioning

confidence: 99%

In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

Moussa

Ketata

Zied

et al. 2019

JAFM

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Three-dimensional flow simulations of the full cycle for four-valve direct-injection Diesel engine have been carried out with different meshes. The aim of the present study is to establish an extensive CFD investigation of in-cylinder aero-thermal flow of a direct-injection Diesel engine. The ICE-CFD solver is used to examine the unsteady behavior of a realistic engine configuration. Moreover, a layering approach and dynamic mesh model are adopted to generate the grid. The predicted radial velocity and swirl ratio for four different meshes are compared with Laser Doppler Velocimetry measurements and with numerical results from the literature. The comparison shows that the obtained results with the fine mesh present a good agreement with the experimental measurements along the compression phase and at the start of the expansion phase. In addition, these results are more accurate than the predicted results reported in the literature. Furthermore, CFD analysis is presented for the whole cylinder volume with regard to several parameters such as velocity field, swirling, tumble flow, pressure and temperature distributions. These results prove that in-cylinder CFD simulation gives reasonably accurate results that enable enhanced knowledge of the aero-thermal flow of full engine cycle.

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Modeling of a bioethanol combustion engine under different operating conditions

Cited by 15 publications

References 36 publications

A Study on the Effect of Ignition Timing on Residual Gas, Effective Release Energy, and Engine Emissions of a V-Twin Engine

A Study on the Effect of Ignition Timing on Residual Gas, Effective Release Energy, and Engine Emissions of a V-Twin Engine

Study on momentum gradient descent on-line engine calibration algorithm combined with search space division

In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

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