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Adoption of the F-statistic of Fisher-Snedecor distribution to analyze importance of impact of modifications of injector opening pressure of a compression ignition engine on specific enthalpy value of exhaust gas flow
1
Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Poland
Submission date: 2023-05-15
Final revision date: 2023-06-17
Acceptance date: 2023-06-19
Online publication date: 2023-07-05
Publication date: 2024-01-02
Corresponding author
Patrycja Puzdrowska
Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Poland
Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Poland
Combustion Engines 2024,196(1), 37-45
KEYWORDS
diagnosisinjector opening pressureF statistic of the Fisher-Snedecor distributioncompression ignition enginefumes temperature
TOPICS
ABSTRACT
This article analyzes the effect of modifications of injector opening pressure on the operating values of a compression ignition engine, including the temperature of the fumes. A program of experimental investigation is described, considering the available test stand and measurement capabilities. The structure of the test stand on which the experimental measurements were conducted is presented. The method of introducing real modifications of injector opening pressure to the existing test engine was characterized. It was proposed to use F statistic of Fisher-Snedecor (F-S) distribution to evaluate the importance of the impact of modifications of injector opening pressure on the specific enthalpy of the flue gas flow. Qualitative and statistical studies of the results achieved from the measurements were carried out. The specific enthalpy of the fumes for a single cycle of the compression ignition engine, determined from the course of rapidly variable flue gas temperature, was analyzed. The results of these studies are presented and the usable adoption of this type of assessment in parametric diagnosing of compression ignition engines is discussed.
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