Abstract
Biofuels represent an energy option to mitigate polluting gases. However, technical problems must be solved, one of them is to improve the combustion process. In this study, the geometry of a piston head for a diesel engine was redesigned. The objective was to improve the combustion process and reduce polluting emissions using biodiesel blends as the fuel. The methodology used was the mechanical engineering design process. A commercial piston (base piston) was selected as a reference model to assess the piston head’s redesign. Changes were applied to the profile of the piston head based on previous research and a new model was obtained. Both models were evaluated and analyzed using the finite element method, where the most relevant physical conditions were temperature and pressure. Numerical simulations in the base piston and the new piston redesign proposal presented similar behaviors and results. However, with the proposed piston, it was possible to reduce the effort and the material. The proposed piston profile presents adequate results and behaviors. In future, we suggest continuing conducting simulations and experimental tests to assess its performance.
Highlights
IntroductionThe need to expel water from mines led to the steam engine’s development, which used wood, coal, or oil as fuel [1]
Published: 25 May 2021The use of combustion machines began in the 18th century
The results showed a decrease in gases with increasing biodiesel content in the mixtures, demonstrating the advantages of using this biofuel in diesel engines
Summary
The need to expel water from mines led to the steam engine’s development, which used wood, coal, or oil as fuel [1] Inconveniences such as extreme working conditions, excessive fuel demand, and low efficiency motivated several engineers to apply modifications to improve the steam engine [2]. The use of hydrogen with oxygen in François Isaac de Rivaz’s internal combustion engine was among the first research conducted in this field [5] This machine’s development led to research in 1851 on pistons fabricated out of cast iron by Barsanti and Felice Matteucci, in an engine where valves were already used to intake and expel gases. The development of various engines, such as George Brayton’s engine in 1872 [4] or Nikolaus August Otto’s engine in 1877 [6], formed the basis for the implementation of internal combustion engines in cars used as means of transport [7]
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