Hybrid drive systems for passenger and commercial vehicles are undergoing extensive development, with almost exclusive concentration on electric hybrid drives. Hydraulic hybrid drives, mostly using various arrangements of hydrostatic drives in conjunction with mechanical energy storage (flywheels), were investigated by various companies and Universities without much commercial success. The perceived disadvantages of hybrid drives, such as pump/motor inefficiencies, led to the abandonment of serious development work in this area. The interest in hydraulic hybrid was recently revived by the development of the Permo-Drive Regenerative Energy Management System (PDREMS), along with recent attention by a major car manufacturer. The objective of the R&D project is to develop a hybrid diesel-hydraulic drive for large commercial vehicles e.g. urban freight delivery, buses or garbage trucks. The major advantages of the PDREMS System over other systems proposed in the past is a reduction in losses during transfer of energy between the truck drive system and the hydraulic pump/motor, and in the application of microprocessor control to optimise power utilisation. This paper presents and discusses the development of the system, modelling approaches and the results of simulation and tests on a test vehicle.
Development of hybrid diesel-hydraulic system for large commercial vehicles
Entwicklung eines hybriden diesel-hydraulischen Systems für große kommerzielle Fahrzeuge
2003
13 Seiten, 5 Bilder, 1 Tabelle, 20 Quellen
Conference paper
English
Hydraulic Hybrid Systems for Commercial Vehicles
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