Hydraulic Hybrid Vehicle Configurations and Comparison With Hybrid Electric Vehicle

In this paper three basic configurations of hydraulic hybrid vehicle are explained. An overview of literature for parallel, series and power-split hydraulic hybrid vehicles is presented. The main advantages and disadvantages, from the aspect of simplicity of implementation, fuel economy and overall efficiency, between individual configurations are also presented. In the end, a more detailed comparison was made between hydraulic hybrid vehicles with hybrid electric vehicles. The main advantages and disadvantages, from the aspect of energy and power density, efficiency of the regenerative braking, speed of the regenerative charging, and initial and maintenance costs of hydraulic hybrid vehicles and hybrid electric vehicles are also presented, as well as an overview of the literature that deals with the comparison of these two types of hybrid vehicles.