Emission Pattern of Compression Ignition Engine Fueled with Blends of Tropical Almond Seed Oil-Based Biodiesel using Artificial Neural Network

Engine pollutants have been a significant source of concern in most countries around the world because they are one of the major contributors to air pollution, which causes cancer, lung disorders, and other severe illnesses. The need to reduce emissions and its consequences has prompted studies into the emission profile of internal combustion engines running on particular fuels. To this end, this study employed the power of Artificial Neural Networks (ANNs) to investigate the impact of injection timing on the emission profile of Compression Ignition Engines fuelled with blends of Tropical Almond Seed Oil based-biodiesel; by conducting a series of experimental tests on the engine rig and using the results to train the ANNs; to predict the emission profile to full scale. Blend percentages, load percentages, and injection timings were used as input variables, and engine emission parameters were used as output variables, to train the network. The results showed that injection timing affect emission output of CI engines fuelled with Tropical Almond Oil based biodiesel; and for the emission pattern to be friendly, injection timing must rather be retarded and not advanced. The results also showed that for different engine emission parameters, there is a strong association between the ANN output results and the actual experimental values; with mean relative error values less than 10%, which fall within the acceptable limits. For emission of CI engines fuelled with Tropical Almond Oil based biodiesel to be friendly in pattern, injection timing must be relatively retarded. The study also concluded that Artificial Neural Network (ANN) is a reliable tool for predicting Compression Ignition Engines emission profiles.

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Utilisation of Cashew Seed Oil Methyl Ester in Compression Ignition Engines and its Engine Performance

Journal of Biofuels ◽

10.5958/j.0976-4763.3.2.010 ◽

2012 ◽

Vol 3 (2) ◽

pp. 97 ◽

Cited By ~ 1

Author(s):

F.I. Otu ◽

E.I. Bello ◽

S.K. Otoikhian ◽

B. Diamond ◽

L.O. Ekebafe

Keyword(s):

Methyl Ester ◽

Seed Oil ◽

Engine Performance ◽

Compression Ignition ◽

Compression Ignition Engines

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Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

10.31224/osf.io/xywbc ◽

2017 ◽

Author(s):

Zachary M. Hammond ◽

John Hunter Mack ◽

Robert W. Dibble

Keyword(s):

Hydrogen Peroxide ◽

Homogeneous Charge Compression Ignition ◽

Injection Timing ◽

Compression Ignition ◽

Aqueous Hydrogen Peroxide ◽

Compression Ignition Engine ◽

Compression Ignition Engines ◽

Wide Range ◽

Phasing Control ◽

Homogeneous Charge

The effect of the direct injection of hydrogen peroxide into a port-injected methane fueled homogeneous charge compression ignition engine was investigated numerically. The injection of aqueous hydrogen peroxide was implemented as a means of combustion phasing control. A single cylinder homogeneous charge compression ignition engine (2.43 L Caterpillar) was modeled using the Cantera 2.0 flame code toolkit, the GRI-Mech 3.0 chemical reaction mechanism, and a single-zone slider-crank engine model. Start of injection timing and the amount of injected hydrogen peroxide were manipulated to achieve desired combustion phasing under a wide range of intake temperatures. As the concentration of hydrogen peroxide is increased, the combustion phasing is advanced up to 22 degrees for the conditions investigated in this study. This advancing effect is most pronounced at small concentrations (< 10 g H2O2 / kg CH4) and early injection timings (SOI < 25 degrees BTDC). The model suggests hydrogen peroxide can be introduced as a means of combustion phasing control while maintaining the low emissions and peak in-cylinder pressures inherent in homogeneous charge compression ignition engines.

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Fuel Stratification and Partially Premixed Combustion With Neat n-Butanol in a Compression Ignition Engine

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4040517 ◽

2018 ◽

Vol 140 (12) ◽

Cited By ~ 3

Author(s):

Shouvik Dev ◽

Tongyang Gao ◽

Xiao Yu ◽

Mark Ives ◽

Ming Zheng

Keyword(s):

Fuel Injection ◽

Direct Injection ◽

Premixed Combustion ◽

Injection Timing ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Fuel Stratification ◽

Partially Premixed Combustion ◽

Partially Premixed ◽

Ci Engines

Homogeneous charge compression ignition (HCCI) has been considered as an ideal combustion mode for compression ignition (CI) engines due to its superb thermal efficiency and low emissions of nitrogen oxides (NOx) and particulate matter. However, a challenge that limits practical applications of HCCI is the lack of control over the combustion rate. Fuel stratification and partially premixed combustion (PPC) have considerably improved the control over the heat release profile with modulations of the ratio between premixed fuel and directly injected fuel, as well as injection timing for ignition initiation. It leverages the advantages of both conventional direct injection compression ignition and HCCI. In this study, neat n-butanol is employed to generate the fuel stratification and PPC in a single cylinder CI engine. A fuel such as n-butanol can provide additional benefits of even lower emissions and can potentially lead to a reduced carbon footprint and improved energy security if produced appropriately from biomass sources. Intake port fuel injection (PFI) of neat n-butanol is used for the delivery of the premixed fuel, while the direct injection (DI) of neat n-butanol is applied to generate the fuel stratification. Effects of PFI-DI fuel ratio, DI timing, and intake pressure on the combustion are studied in detail. Different conditions are identified at which clean and efficient combustion can be achieved at a baseline load of 6 bar IMEP. An extended load of 14 bar IMEP is demonstrated using stratified combustion with combustion phasing control.

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