Abstract
Abstract
Research and optimization of the diesel engine´s working process assume the knowledge about
characteristic of the used fuel, especially its auto-ignition properties described by cetane number (CN). In the case of application of the fuels originating from bio-mass and also of classical fuels with additives for improvement of auto-ignition characteristics (so called cetane improvers), the only option for determination of CN is the engine method. Standard ISO 5165 (ASTM D613) test and similar tests demand application of specific, very expensive, laboratory equipment, so relatively small number of institutions has been approved for the test.
The fact that the method for CN determination is comparative in nature has led us to try to develop substitute engine method for CN determination, by the use of the available laboratory equipment and serial, mono-cylindrical engine with direct injection, DMB LDA 450. Description of the method, results of optimization of engine´s working parameters for conduction of the test and method´s precision estimate are given in the paper.
Keywords: alternative fuels, auto-ignition quality, cetane engine method, diesel engine
.