Biodiesel stability effect on diesel fuel injection equipment
Abstract
The subject of this study is the investigation of the effect of fatty acid methyl esters (FAME) biodiesel fuel degradation on the operation of a modern vehicle’s fuel injection equipment (FIE) and specifically οn solenoid injectors and high-pressure pump. An advanced experimental FIE test rig, that is able to accurately simulate the operation of the FIE and reproduce the formation of deposits inside FIE components, has been developed. The study focuses specifically on deposits formed during the polymerization of secondary oxidation products from autoxidation processes. Autoxidation is a free radical chain process consisting of chain initiation, propagation, and termination steps. The initiation is characterized by the depletion of oxidation stability and the formation of peroxides (intermediate product) and is represented by an exponential increase of the peroxide number (POΝ). Peroxide decomposition leads to the formation of secondary oxidation products that is reflected by an expon ...
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