MATEC Web Conf.
Volume 254, 2019XXIII Polish-Slovak Scientific Conference on Machine Modelling and Simulations (MMS 2018)
|Number of page(s)||12|
|Section||Advanced Industrial, Automotive and Green Energy Applications|
|Published online||15 January 2019|
The problems of measuring the temperature of the small engines (SI) on the example of a drive for non-road mobile machines
Poznan University of Technology, Chair of Basic of Machine Design, Piotrowo Street 3, 60-965 Poznan, Poland
* Corresponding author: firstname.lastname@example.org
Modern drive units designed for driving non-road machines are characterized by liberal regulations regarding the limits of toxic compounds emission in exhaust gases. These regulations contribute to the low level of technical advancement of this type of drive units. Among the new non-road small engines (SI) offered in the sale in 2018 in the European Union, the majority of them are equipped with carburettor systems whose fuel supply characteristics do not allow to achieve modern fuel-air mixture control standards. Therefore, action should be taken to develop these drive units towards electronic control of combustion processes in these engines, which will allow the use of innovative control algorithms. One of the basic signals supporting the selection of the air-fuel mixture is the engine temperature. The paper presents an overview of the methods for measuring the temperature of internal combustion engines and presents the results of research on the process of warming up the engine. The tests were carried out with three methods using an oil temperature sensor, a surface temperature sensor and a thermal imaging camera. An attempt was made to indicate construction guidelines taking into account the place of temperature measurement, correction factors were determined in relation to the oil temperature. The developed coefficients can be used to precisely determine the thermal state of the engine, which is an important aspect in the process of controlling the fuel-air mixture and affects its consumption.
Key words: small engine SI / non-road mobile machines / engine temperature measurement
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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