Chalid el Dsoki

Bio: Chalid el Dsoki is an academic researcher from Technische Universität Darmstadt. The author has contributed to research in topics: Fatigue limit & Material properties. The author has an hindex of 5, co-authored 13 publications receiving 142 citations.

Device for region-wise checking of rolling and/or wear resistance of e.g. linear guide to determine service life of component, has contact body for rolling and sliding motion on surface area of component under application of force on area

Abstract: The device (100) has a support for fixing a component (101) to be checked i.e. linear guide, and a contact body arranged opposite to the support. The support and the contact body are linearly moveable relative to each other with constant or variable relative speed over a selectable time period in a region wise manner. The contact body is placed for carrying-out a rolling and/or sliding motion on a surface area of the component facing the contact body under application of force on the surface area of the component that is fixed on the support. The contact body is selected from a group consisting of a step-shaped sliding body, a roller or belt pulley, a curvilinear such as a ball or gear component, a trained logarithmic profile such as ball bearing or cylindrical roller bearing. The contact conditions are selected from a group consisting of Hertz pressing, slippage, lubrication state, normal or frictional force, temperature, lubricants or geometric dimensions of the contact body and/or component. An independent claim is also included for a method for a region-wise checking of a rolling and/or wear resistance of a component.

Status of Pure Electric Vehicle Power Train Technology and Future Prospects

Abstract: Electric vehicles (EV) are becoming more common mobility in the transportation sector in recent times. The dependence on oil as the source of energy for passenger vehicles has economic and political implications, and the crisis will take over as the oil reserves of the world diminish. As concerns of oil depletion and security of the oil supply remain as severe as ever, and faced with the consequences of climate change due to greenhouse gas emissions from the tail pipes of vehicles, the world today is increasingly looking at alternatives to traditional road transport technologies. EVs are seen as a promising green technology which could lead to the decarbonization of the passenger vehicle fleet and to independence from oil. There are possibilities of immense environmental benefits as well, as EVs have zero tail pipe emission and therefore are capable of curbing the pollution problems created by vehicle emission in an efficient way so they can extensively reduce the greenhouse gas emissions produced by the transportation sector as pure electric vehicles are the only vehicles with zero-emission potential. However, there are some major barriers for EVs to overcome before totally replacing ICE vehicles in the transportation sector and obtain appreciable market penetration. This review evaluates the technological aspects of the different power train systems of BEV technology and highlights those technological areas where important progress is expected by focusing on reviewing all the useful information and data available on EV architecture, electrical machines, optimization techniques, and its possibilities of future developments as green mobility. The challenges of different electric drive trains’ commercialization are discussed. The major objective is to provide an overall view of the current pure electric vehicle powertrain technology and possibilities of future green vehicle development to assist in future research in this sector.