Pressure wave generator for developing resonance in a closed pipe, used for an alternant-hydraulic transmission

Abstract

To meet the current requirements imposed by the vehicle manufacturers to reduce significantly the fuel consumption and associated CO2 emissions, it is necessary the research and development of new technical emission and consumption quantity reducing systems. A direction that has emerged in recent years is to develop hybrid-hydraulic propulsion systems which permit to reconsider the research objectives of the engines for an optimal functioning. The scientific approach is based on the fundamental research regarding the pressure waves energy generation - propagation and conversion process, research based on 2D simulations of the flow and on experimental results obtained by waves’ piezoelectric measuring. The conclusions from the fundamental study are further used for developing mechano-hydraulic resonant systems designed to be integrated into the vehicle’s propulsion system.