DOI: 10.5593/sgem2017/53/S21.035


L. Dumitrescu, P.A. Chirita, I.C. Dutu, C. Marculescu
Wednesday 13 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-10-2 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 53, 277-284 pp, DOI: 10.5593/sgem2017/53/S21.035


Multipurpose vehicles are trucks that were implemented in order to achieve some different equipment related to road works such as snow removal, sweeping and spraying the streets, roadside mowing, trimming trees etc. Multipurpose vehicles have two operating modes. ● Regime for marching. Rapidly moving vehicles from one location to another. Torque at the drive wheels is small and the speed is high. ● Technological regime. The vehicle traveling at a low speed (max 8 km/h) imposed by technology of working multifunctional equipment. Torque at the drive wheels is high and the speed is low. In this sense, the request came from a company in the field of road maintenance to achieve a special transmission that allows achieving low speeds during working operations. The product is made in a research project between the company and a specialized institute in hydraulic drives. The article analyzes the solution of the energy efficiency of multifunctional trucks in the technological shift regime by means of a hydraulic, mechano-hydraulic transmission achieved by the implementation in the kinematic chain of the mechanical transmission of the truck of a hydraulic transmission. The following are presented: Hybrid transmission construction and operation, hydrostatic transmission scheme and structure, energy efficiency as a result of the hydraulic transmission implementation and numerical simulation of the main functional parameters of the transmission.

Keywords: Energy efficiency, hydrostatic transmission, technological speed, multifunctional truck