Effective Utilization of Blended Plant Fuels for Pre-Combustion Chamber Compression Ignition Engines

Instantaneous and mean values of heat transfer at various positions in the combustion chamber were obtained, by means of surface thermocouples, for different loads and speeds and compared with those obtained theoretically from synthesized cycle calculations. The results show that the usual model of homogeneity in the cylinder is inadequate for heat transfer calculations. Peak rates of heat transfer when in the vicinity of a fuel spray were comparatively little dependent upon load or speed. At the periphery of the combustion chamber the mean heat transfer rates were appreciably lower than to the cylinder head and piston and the rapid rise in instantaneous values occurred appreciably later. The results all suggest the need for a more realistic model based upon the geometry and penetration of the fuel sprays.

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Experimental Investigation on Combustion and Emission Characteristics of Modified Piston in an IDI Diesel Engine Fueled with Ethyl Alcohol

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.984-985.873 ◽

2014 ◽

Vol 984-985 ◽

pp. 873-877 ◽

Cited By ~ 4

Author(s):

M. Parthasarathy ◽

J. Isaac Joshua Ramesh Lalvani ◽

E. Prakash ◽

S. Jayaraj ◽

K. Annamalai

Keyword(s):

Combustion Chamber ◽

Ethyl Alcohol ◽

Ignition Temperature ◽

Flame Temperature ◽

Emission Characteristics ◽

Compression Ignition ◽

Hot Surface Ignition ◽

Compression Ignition Engines ◽

Surface Ignition ◽

Hot Surface

Compression ignition engines with ethyl alcohol as a fuel are associated with some problems. Because of ethyl alcohol has high self-ignition temperature. It can be used in compression engine by hot surface ignition method which is used to resolve the ignition of the fuel. The modification of the engine is carried out in such a way that a pre combustion chamber is designed in engine head with a provision for heat plug is made on the pre combustion chamber. A piston with squish plate is designed and thermally analyzed. The squish piston helps for attaining better homogeneous mixture than conventional piston. Thus the better combustion is obtained with the squish piston resulting with higher adiabatic flame temperature than the conventional piston. When air is inducted into the combustion chamber it is exposed to high temperature. Modifications for pure ethyl alcohol made significant improvement in thermal efficiency, torque and reduction in specific fuel consumption of an engine. The results exhibit a path toward ethyl alcohol has an effective alternative to conventional diesel engines.

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EFFECT OF CNG IN A FUEL DOSE ON THE COMBUSTION PROCESS OF A COMPRESSION-IGNITION ENGINE

Transport ◽

10.3846/16484142.2015.1045938 ◽

2015 ◽

Vol 30 (2) ◽

pp. 162-171 ◽

Cited By ~ 10

Author(s):

Maciej Mikulski ◽

Sławomir Wierzbicki

Keyword(s):

Natural Gas ◽

Combustion Chamber ◽

Alternative Fuels ◽

Combustion Process ◽

Diesel Oil ◽

Dual Fuel ◽

Compression Ignition ◽

Compression Ignition Engine ◽

Compression Ignition Engines ◽

Main Component

Currently, one of the major trends in the research of contemporary combustion engines involves the potential use of alternative fuels. Considerable attention has been devoted to methane, which is the main component of Natural Gas (NG) and can also be obtained by purification of biogas. In compression-ignition engines fired with methane or Compressed Natural Gas (CNG), it is necessary to apply a dual-fuel feeding system. This paper presents the effect of the proportion of CNG in a fuel dose on the process of combustion. The recorded time series of pressure in a combustion chamber was used to determine the repeatability of the combustion process and the change of fuel compression-ignition delay in the combustion chamber. It has been showed that NG does not burn completely in a dual-fuel engine. The best conditions for combustion are ensured with higher concentrations of gaseous fuel. NG ignition does not take place simultaneously with diesel oil ignition. Moreover, if a divided dose of diesel is injected, NG ignition probably takes place at two points, as diesel oil.

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