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A study of emission reduction by using alcohol blend fuel for small diesel engine

Kawakami T.

Journal of KONES

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2014

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Vol. 21, No. 1

125--130

EN

In practical diesel engines it is to achieve a low emission and low fuel consumption under from low to high load operation conditions. Several techniques were developed for the low emission and high efficiency, such as Homogeneous Charge Compression-Ignition Engines and the blend fuels. Nevertheless, there are only few data available for reducing the emissions and fuel consumption of small diesel engines by using blend fuels. This experiment has been carried out to examine the influence of alcohol blend fuels on combustion characteristics for small diesel engine. The fuels used in this study are light oil (Standard), ethanol, propanol and butanol. The combustion behaviours, such as the emissions in exhaust gas (NOX, CO, CO2, O2 concentration), fuel consumption rate are observed. The main conclusions are as follows: 1) it is possible to control the combustion behaviour by using alcohol blend fuels for small diesel engine, 2) the fuel consumption of at any alcohol blend fuels is bigger than that of light oil, 3) the net thermal efficiency of some alcohol blend fuels (E5P5, P5B5, E5B5) slightly increases than that of light oil, 4) the NOx emissions for all the alcohol blend fuels are smaller than that of light oil, 5) the CO emissions are remarkably bigger than that of light oil under from low to middle engine load without the ethanol 10% addition.

2

Ocena wpływu podziału dawki na parametry procesu spalania w małym silniku ZS

Pietras D.

Silniki Spalinowe

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2011

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R. 50, nr 3

PL

W artykule omówiono zagadnienie wpływu podziału dawki paliwa w silniku ZS na parametry procesu spalania. W ramach prac opisanych w referacie wykonano badania doświadczalne małego silnika o zapłonie samoczynnym z zasilaniem typu Common Rail i podziałem dawki paliwa na trzy części w zakresie małych obciążeń. W takcie badań w wytypowanych punktach pracy silnika wykonano pomiary dla dawki dzielonej na trzy i dwie części oraz dla dawki niedzielonej. W oparciu o opracowany program wykonano obliczenia podstawowych parametrów procesu spalania. Wyniki obliczeń zostały przedstawione graficznie na wykresach oraz przeprowadzono ich analizę.

EN

The article discusses the impact of the fuel dose division on diesel engine combustion parameters. In the work described in this paper experimental study of a small diesel engine with Common Rail fuel delivery with the division into three parts for light duty was performed. During the tests at selected points of engine operation performed measurements for the dose shared into three and two parts, and for a unshared dose. Based on the developed program calculating the basic parameters of the combustion process was performed. The calculation results are graphically in the charts presented and their analysis was carried out.

3

Combustion characteristics for small diesel engine by using emulsified blend fuels of vegetable oil and light oil

Kawakami T.

Journal of KONES

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2011

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Vol. 18, No. 4

185-190

EN

The paper is focusing on combustion characteristics for small diesel engine by using emulsified blend fuels of vegetable oil and light oil. Target is to achieve low emissions and low fuel consumption for internal combustion engines. The fuels used in this study are light oil, blend fuels [light oil + coconut oil, light oil + palm oil], and emulsified fuels [light oil + water, blend fuels + water]. Mean increasing rate of pressure is calculated from the value which subtracted initial pressure from maximum burning pressure divided by total burning time. The mean increasing ratio of pressure is calculated from the value which subtracted initial pressure from maximum burning pressure divided by the total burning time. The emissions in exhaust gas are measured with an analyzer of exhaust gas. The data of 30 tests for each engine revolutions were averaged arithmetically. Experimental approach and results have been presented by details. The main conclusions are as follows: it is possible to control the combustion behaviour by using blend fuels and emulsified blend fuels for small diesel engine; the maximum burning pressure of emulsified blend fuels increases at low engine speed; the CO emission of blend fuels is smaller than that of light oil; the NOX emission of emulsified coconut blend fuel and emulsified palm blend fuel is smaller than that of light oil; the CO emission of emulsified Coconut-Palm blend fuel is equal to that of light oil at low engine speed.