Search for dissertations about: "hydrostatic transmission"

Showing result 1 - 5 of 8 swedish dissertations containing the words hydrostatic transmission.

2. 1. On Complex Hydrostatic Transmissions : Design of a Two-Motor Concept using Computer-Aided Development Tools

   Author : Mikael Sannelius; Jan Wikander; Stockholm Kungliga Tekniska Högskolan; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Hydrostatic drives are being used in heavy, low-speed vehicles to an ever-increasing extent. The reason for this is that a number of advantages can be achieved such as stepless gear ratios, simple power distribution and high stiffness. Increased demands have led to an interest for new conceptual designs for hydrostatic transmissions. READ MORE

4. 2. Continuously Variable Split-Power Transmissions with Several Modes

   Author : Per Mattsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; continuously variable transmission; variator; speed ratio range; ratio coverage; traction drive; mode shift; CVT; planetary gear; power split; IVT; infinitely variable transmission; epicyclic gear train; hydrostatic variator;

   Abstract : A continuously variable transmission (CVT) of split-power design consists of a variator and an arrangement of planetary gears. A black box model describing such transmissions is presented. The model can be used for synthesis as well as loss-free analysis of split-power CVT concepts in general. READ MORE

5. 3. Numerical and experimental study of performance of a hydraulic motor

   Author : Leon Dahlén; Mittuniversitetet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydraulic fluid; hydrostatic transmission; hydraulic motor; Engineering mechanics; Teknisk mekanik; Maskinelement;

   Abstract : The aim of this study was to develop an understanding of the fluid properties that influence the efficiency of hydraulic systems in a steady-state, especially components in hydrostatic transmission systems under different running conditions. The aim has also been to investigate and model the sources of losses in hydraulic machines, in order to estimate the losses, taking fluid properties into account. READ MORE

6. 4. Performance analysis of a low-speed high-torque hydrostatic transmission unit

   Author : Håkan Olsson; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

   Abstract : This thesis concerns a study of the performance of an industrial low-speed high-torque hydrostatic drive system. This type of hydrostatic transmission is commonly used in continuous operation in a wide range of heavy-duty drive applications. In many applications the transmissions have to compete with e.g. READ MORE

7. 5. Optimal Engine Operation in a Multi-Mode CVT Wheel Loader

   Author : Tomas Nilsson; Jan Åslund; Lars Nielsen; Anders Fröberg; Lars Johanneson Mårdh; Linköpings universitet; []
   Keywords : ;

   Abstract : Throughout the vehicular industry there is a drive for increased fuel efficiency. This is the case also for heavy equipment like wheel loaders. The operation of such machines is characterized by its highly transient nature, the episodes of high tractive effort at low speed and that power is used by both the transmission and the working hydraulics. READ MORE