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The Impact of Rapeseed Oil Methyl Esters on Fuel Injection Parameters in a Diesel Engine Equipped with the Common Rail Injection System

Lotko Wincenty

Advances in Science and Technology. Research Journal

2021

Vol. 15, no 3

76--87

In the global fuel economy, new challenges concerning the use of alternative (vegetable) fuels in the internal combustion engines are starting to arise. The important issue is to meet the new limits on four main pollutant emissions from a diesel engines: CO (carbon monoxide), NOx (nitrogen oxides), HC (hydrocarbons) and PM (particulate matter). The design of a modern engine must be characterized by high efficiency, its dynamics of movement and durability. Dynamic development of plant fuels is forced by the new strategy of the global fight against the global warming. For these reasons, it is necessary to do research concerning the effects of the use of biofuels, including methyl esters, higher fatty acids of rapeseed oil for self- ignition engines. The current tests must concern the engines equipped with the latest Common Rail fuel injection systems. In the publication, the above-mentioned issues have been analyzed, and the results of tests of the basic injection process parameters have been presented. The AVL5402 engine was fueled with mixtures of diesel oil with RME ester of rapeseed oil produced by ORLEN Południe S.A. in Trzebinia. The impact of the fuel (v/v) RME content in the mixture with diesel oil on the injection process parameters such as: initial velocity of the injected fuel, critical speed of secondary fuel breakup, critical droplet diameter, microstructure of the fuel stream, droplet Sauter mean diameter, vertical angle of the fuel stream, have been justified. The impact of the fuel (v/v) RME content in the mixture with diesel oil on the above-mentioned parameters has been proved. During the tests, the engine worked on the load characteristics.

The influence of spray guided charge on possibility of stratified mixture formation in SI gasoline direct injection engine

Sendyka B., Kudzia S.

Journal of KONES

2007

Vol. 14, No. 4

393-402

In this paper there has been described the structure of ZI gasoline direct injection engines in which there has been applied spray guided. There has been shown the burning chambers structure of the engines of that type. There has been also presented the modification range of ZI engines equipped with system of gasoline multipoint indirect injection in order to get the gasoline direct injection engine with spray guided. The authors have described the block diagram of fuel supply system of this type of an engine which is being developed in Cracow University of Technology's Combustion Engine Department. Certain information about mechanical modification of engine is given. They have proposed model of fuel air mixture stratification in a combustion chamber of spray guided engine, in which base homogeneous mixture come into being out of the this chamber. In this paper there has been also designated an influence of an angle of crank shaft on initial velocity of fuel stream and on flow intensity of fuel stream that flows through the injector. There also has been presented an influence of air fuel coefficient of homogeneous base mixture on the angle on a crank shaft of ignition charge.