DESIGN AND FUEL ECONOMY OF A SERIES HYDRAULIC HYBRID VEHICLE

Peter ACHTEN, Georges VAEL, Mohamed Ibrahim SOKAR, Torsten KOHMÄSCHER
2008 Proceedings of the JFPS International symposium on fluid power  
A series hydraulic hybrid drive train for application in a passenger car is described. This 'Hydrid' drive train features an in-wheel hydraulic motor in all four wheels, hydraulic transformers for power control and hydraulic-pneumatic accumulators for energy storage and power management. The hydrostatic components are based on the highly efficient floating cup principle. The result is an efficient all-wheel drive vehicle with variable traction control on the front and rear axis. The fuel
more » ... is. The fuel economy and the CO 2 -emission of the drive train are calculated for a mid-class sedan while driving the New European Driving Cycle (NEDC). The efficiency of the hydrostatic components is derived from efficiency measurements of the floating cup pump. KEY WORDS Series Hybrid Hydraulic Vehicle Efficiency NOMENCLATURE b NEDC specific fuel consumption [l/100km] c conversion constant [l/100km/Wh] E drag cumulative rolling and aerodynamic resistance during the NEDC [Wh] E kin cumulative kinetic energy during the NEDC [Wh] ICE average cycle efficiency of a diesel engine [-] recup degree of recuperated kinetic energy which is actually stored in the accumulator [-] T average cycle efficiency of a transmission component of a series hybrid [-] rotational position of the motor shaft [°]
doi:10.5739/isfp.2008.47 fatcat:ll5qbl5nurhuzdtxmjhezpyura