Fuel Economy and Operating Characteristics of a Hydropneumatic Energy Storage Automobile

Paper #:
  • 851678

Published:
  • 1985-10-01
Citation:
Wu, P., Luo, N., Fronczak, F., and Beachley, N., "Fuel Economy and Operating Characteristics of a Hydropneumatic Energy Storage Automobile," SAE Technical Paper 851678, 1985, https://doi.org/10.4271/851678.
Pages:
12
Abstract:
Recent advances in hydrostatic transmission efficiency and accumulator technology make the hydropneumatic energy storage automobile appear quite attractive as a means of improving fuel economy. The system examined in this paper utilizes a conventional internal combustion engine, and two hydrostatic pump/motor units with an accumulator between them. The accumulator allows regenerative braking and permits the engine operation to be uncoupled from the road load. Detailed, second-by-second driving cycle simulations have been used to study the fuel economy possible with various combinations of component parameters. The design can provide excellent fuel economy with a moderate size accumulator.
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