Over recent years ionic liquids have gained in importance, causing a growing number of scientists and engineers to investigate possible applications for these liquids because of their unique physical and chemical properties. Their outstanding advantages such as nonflammable liquid within a broad liquid range, high thermal, mechanical, and chemical stabilities, low solubility for gases, attractive tribological properties (lubrication), and very low compressibility, and so forth, make them more interesting for applications in mechanical engineering, offering great potential for new innovative processes, and also as a novel hydraulic fluid. This paper focuses on the outstanding compressibility properties of ionic liquid EMIM-EtSO4, a very important physical chemically property when IL is used as a hydraulic fluid. This very low compressibility (respectively, very high Bulk modulus), compared to the classical hydraulic mineral oils or the non-flammable HFDU type of hydraulic fluids, opens up new possibilities regarding its usage within hydraulic systems with increased dynamics, respectively, systems' dynamic responses.

The aim of this work was to identify, which of the known ionic liquids used within the technical area, primarily as a lubricant, would also be appropriate for use as a hydraulic fluid. In this context, their suitability has been proved based on experimental research with respect to the appropriate physical and chemical properties as required for mineral based hydraulic fluid. Primary aim of the research was to determine the ability of ILs to protect against corrosion, which is one of the important factors in choosing an ionic liquid. The results show that, despite excellent lubricating properties, certain ILs fail on this corrosion test. Except the corrosion protection performance of the basic hydraulic components parts, e.g. hydraulic pumps and valves, in the foreground was their compatibility with other materials used within other parts of hydraulic system, e.g. coating of the hydraulic tank and the filter material. For this purpose standard tests methods for mineral based hydraulic oils have been used, supplemented with non-standard tests, carried out at the same conditions as they occur during the operation of the hydraulic system.

The base of the final product is the base oil. The final product is ready for use and is a mixture of base oil (or several base oils) and additives. Additives improve the properties of the base oil. Base oils can be mineral or synthetic based. Base oils or base stocks are created from separating and cleaning up crude oil. They are one of several liquid components that are created from crude oil. The crude oil refining process will be briefly described. The American Petroleum Institute implemented a system for describing various base oil types. The result was the development and introduction of base oils group numbers. The API numbers of various base oil groups and the main differences between them will be explained. At the end, premium quality hydraulic oil and its main characteristics will be presented.

Design and layout:University of Maribor Press No. of Copies 120Published in: September 2017 © University of Maribor PressAll rights reserved. No part of this book may be reprinted or reproduced or utilized in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publisher. The International Fluid Power Conference is a two day event, intended for all those professionally-involved with hydraulic or pneumatic power devices and for all those, wishing to be informed about the 'state of the art', new discoveries and innovations within the field of hydraulics and pneumatics. CIP -Kataložni zapis o publikacijiThe gathering of experts at this conference in Maribor has been a tradition since 1995, and is organised by the Faculty of Mechanical Engineering at the University of Maribor, in Slovenia. Fluid Power conferences are organised every second year and cover those principal technical events within the field of fluid power technologies in Slovenia, and throughout this region of Europe. This year's conference is taking place on the 14th and 15th September in Maribor.We wish all participants at the International Conference-Fluid Power 2017 continued successful professional work, and hope that we have yet again added another small piece within the mosaic of fluid power. 1The role of pneumatics in digital systems Industry 4.0 represents a future where intelligent machines are self-aware and automation challenges can be solved by the machinery itself. In the factory of tomorrow, cyber-physical systems will communicate with one another using the Internet of Things. Microsystems will make decisions autonomously and highly sensitive robots will support employees so that they can continue to work, even in their later years.Pneumatic applications are sturdy and reliable, which from an Industry 4.0 perspective might also be interpreted as inflexible. For pneumatics, this concept seems to leave only peripheral tasks. Simple, repetitive tasks might remain under the control of some intelligent sub-system. The "natural" motion for intelligent cyberphysical systems seems to be driven electrically.For machine builders and machine operators pneumatic controls come with some additional challenges, since every logical function comes encapsulated in a physical valve. Changing the functionality means exchanging the valve. This also means that potentially a lot of valves and other pneumatic function elements such as throttles are kept on stock resulting in costs. Pneumatic valve terminal with controller and multiple functions, where any combination of functions can be implemented, but changing functions requires physical changes is shown in Figure 1. Digital pneumaticsAs a response to above mentioned challenges, Festo has developed the Festo Motion Terminal, the world's first standardised platform that will develop into a "cyber-physical system" thanks to its intelligent fusi...