Effect of Combustion System Parameters on DI Diesel Engine Performance and Exhaust Emissions

This paper presents a comparative analysis of the diesel engine performance and emission characteristics, when operating on diesel fuel and various diesel-biodiesel (B10, B20, B40, B60) blends, at various loads and engine speeds. The experimental tests were performed on a four-stroke, four-cylinder, direct injection, naturally aspirated, 60 kW diesel engine D-243. The in-cylinder pressure data was analysed to determine the ignition delay, the Heat Release Rate (HRR), maximum in-cylinder pressure and maximum pressure gradients. The influence of diesel-biodiesel blends on the Brake Specific Fuel Consumption (bsfc) and exhaust emissions was also investigated. The bench test results showed that when the engine running on blends B60 at full engine load and rated speed, the autoignition delay was 13.5% longer, in comparison with mineral diesel. Maximum cylinder pressure decreased about 1–2% when the amount of Rapeseed Methyl Ester (RME) expanded in the diesel fuel when operating at full load and 1400 min–1 speed. At rated mode, the minimum bsfc increased, when operating on biofuel blends compared to mineral diesel. The maximum brake thermal efficiency sustained at the levels from 0.3% to 6.5% lower in comparison with mineral diesel operating at full (100%) load. When the engine was running at maximum torque mode using diesel – RME fuel blends B10, B20, B40 and B60 the total emissions of nitrogen oxides decreased. At full and moderate load, the emission of carbon monoxide significantly raised as the amount of RME in fuel increased.

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Experimental Study on External Supercharging of DI Diesel Engine with Swirl Chamber Combustion System

2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring ◽

10.1109/cdciem.2011.96 ◽

2011 ◽

Author(s):

Shengli Wei ◽

Zhong Wang ◽

Gongping Mao ◽

Peiyong Ni

Keyword(s):

Experimental Study ◽

Diesel Engine ◽

Combustion System ◽

Swirl Chamber ◽

Di Diesel Engine

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Performance Assessment of DI-Diesel Engine using the Blend of Sunflower Oil and Rice Bran Oil

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.d8455.118419 ◽

2019 ◽

Vol 8 (4) ◽

pp. 4048-4052

Keyword(s):

Diesel Engine ◽

Sunflower Oil ◽

Fuel Injection ◽

Rice Bran Oil ◽

Engine Performance ◽

Performance And Emission ◽

Animal Fats ◽

Di Diesel Engine ◽

Hc Emissions ◽

Direct Fuel Injection

Biodiesel, a derivative of vegetable oils and animal fats, is used nowadays as an alternative renewable and sustainable fossil fuel. In this work, the investigation of manufacture, characterization, and results of biodiesel blends are carried out using two important feedstock’s, sunflower oil and ricebran oil on engines. For the collective advantageous of sunflower oil and ricebran oil, the two biodiesels are combined together and the mixture is analysed to assess the engine performance and emission characteristics. NaOH catalyzed transesterification process is used for producing the Biodiesels A 4.4 kW, four-stroke, single-cylinder and direct fuel injection diesel engine is used for measuring physic-chemical with full load and varying speed conditions and using the specifications of ASTM D6751 standard, the properties are compared. It is observed that the Biodiesel mixtures produce a low brake torque and high brake-specific fuel consumption (BSFC) in addition to the reduction of CO and HC emissions. NOx, however, is reduced considerably with the improvement of brake thermal efficiency. The Performance analysis indicates that the mixture of sunflower oil and ricebran oil improves performance and emission characterizes over sunflower oil and ricebran oil biodiesel when they are unmixed..

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