Design and downhill speed control of an electric-hydrostatic hydraulic hybrid powertrain in battery-powered rail vehicles

Huanlong Liu, Yue Jiang and Shun Li

Energy, 2019, vol. 187, issue C

Abstract: The diesel-driven rail vehicles are gradually replaced by battery-powered rail vehicles (BRVs), due to its exhaust emissions and noise. However, the development of BRVs have two aspects that need improvement: low energy efficiency and poor downhill stability. To address these problems, this paper presents the design and downhill speed control of an electric-hydrostatic hydraulic hybrid (EH3) powertrain, which is mainly composed of a variable pump, a variable pump/motor, a proportional flow control valve (PFCV) and accumulators. Through a laboratory test bench, the hydraulic regenerative/non-friction braking performance of an EH3 powertrain is validated and experimentally analyzed. The hydraulic average energy recovery rate could be 50%. The method of downhill speed control is proposed, which is validated by the simulation results. During the downhill process, EH3 rail vehicle has a relatively high energy efficiency, which will bring good economic benefits in energy conversation and environmental protection.

Keywords: Battery-powered rail vehicles (BRVs); Electric-hydrostatic hydraulic hybrid (EH3) powertrain; Hydraulic regenerative/ non-friction braking; Downhill speed control; Energy efficiency (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:187:y:2019:i:c:s0360544219316470

DOI: 10.1016/j.energy.2019.115957

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