A novel Hybrid Drive System is described. An advanced composite flywheel is one core element of this system. Key components of the system are identified and their roles discussed. Potential integration with other typical elements of hybrid drive systems is discussed. The characteristics of the flywheel, e.g. energy density and power density are derived from basic design considerations and dimensioning constraints. Safety considerations are mentioned. The benefit of the mechanical hybrid drive system for commercial vehicles is identified and the application to is described.It has been shown that as a consequence of employing innovative enabling technology building blocks mechanical hybrid systems based on high speed flywheels can make a significant contribution towards improving the CO2 balance of vehicles. Increased energy density avoiding vacuum seals and high rotational speed outside the actual flywheel and independent dimensioning of CVT (Continious variable transmission)(for power) and flywheel (energy) make this a virtually infinitely adaptable component. Due to this and its modularity it is mandatory to explore the best possible adaption to the operational envelope of the respective application and the most effective combination with other new vehicle subsystems in order to achieve the best energetic efficiency. The base of a Kinergy system for a heavy duty truck might consist of a modular arrangement of two CVT Flywheel units, rated at 150 kW and 2 MJ each, where a electrical bleed/feed interface to a (small) battery which could run the auxiliaries and also be fed by a exhaust gas heat recovery system. The cost advantage of Kinerg will make up for some additional complexity. Ricardo Vehicle Simulation (V-Sim) software is able to simulate a flywheel hybrid vehicle the hybrid control strategy has evolved from the strategy developed previously for electric hybrids and was subsequently further refined for flywheel specific functionality. Thus a variety of potential combinations can be explored under different use-profiles and the best adapted system be combined from a limited number of modules. The current interest in exhaust gas heat recovery and the great efforts dedicated to battery development open avenues to significant progress. Multiple additional bifurcations in energy flow will call for enhanced control algorithms. Ricardo has long experience and relevant expertise in all these fields.
Ricardo high efficiency mechanical hybrid for heavy-duty vehicles
Hocheffizientes mechanisches Ricardo-Hybridsystem für Schwerlastkraftwagen
2010
14 Seiten, 11 Bilder, 6 Quellen
Conference paper
Storage medium
English
Ricardo high efficiency mechanical hybrid for heavy duty vehicles
Automotive engineering | 2010
|Energy Conversion Efficiency of Hybrid Electric Heavy-duty Vehicles
SAE Technical Papers | 2009
|Energy conversion efficiency of hybrid electric heavy-duty vehicles
Automotive engineering | 2009
|Technology - Test Equipment Review - New Heavy-Duty Emissions Test Cell At Ricardo
Online Contents | 2002
Reducing CO2 - the Ricardo mechanical hybrid drive
Automotive engineering | 2010
|