Original scientific paper

https://doi.org/10.17559/TV-20230315000440

Updating a Didactical Piston Engine Test Bench, from Analogue Instrumentation to Digital

Cornel Mihai Tărăbîc ; National Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu, 061126 Bucharest, Romania; Faculty of Aerospace Engineering, National University of Science and Technology Politehnica Bucharest, 1-7 Polizu Street, 1, 011061 Bucharest, Romania
Grigore Cican orcid.org/0000-0003-0669-8131 ; National Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu, 061126 Bucharest, Romania; Faculty of Aerospace Engineering, National University of Science and Technology Politehnica Bucharest, 1-7 Polizu Street, 1, 011061 Bucharest, Romania *
Gabriel Dediu ; National Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu, 061126 Bucharest, Romania
Razvan Marius Catană ; National Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu, 061126 Bucharest, Romania

* Corresponding author.

Abstract

This paper presents a study on the transition of a didactic piston engine from analogue instrumentation to digital. The T81M piston engine, paired with the T82M dynamometer, both manufactured by Didacta Italia, underwent supplementary instrumentation to facilitate the experimental campaign. Additional sensors, including a speed sensor, thermocouples for exhaust and intake, and pressure sensors for intake and cylinder, were incorporated. A graphical interface was developed using LabView software to capture and store data obtained from experiments conducted with bioethanol fuel. The T81M piston engine features a quartz cylinder for visualizing different stages of the combustion process, and its piston operates without the need for lubrication due to the specific materials used in its construction. The experimental campaign involved starting the engine, maintaining it in idle mode for a few minutes, and gradually increasing the throttle needle while keeping the control lever fully open to reach the maximum regime step by step for data collection. The concluding phase of the experiment involved visualizing the combustion process in the cylinder for various piston positions and studying the flame's color. The digitalization of the T81M piston engine enhances its suitability for modern teaching experiments.

Keywords

analogue to digital; experiment; instrumentation; piston engine; quartz cylinder

Hrčak ID:

318450

URI

https://hrcak.srce.hr/318450

Publication date:

27.6.2024.

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