Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
HYDRAULIC-PNEUMATIC REGENERATIVE BRAKING SYSTEM FOR HYBRIDIZATION OF COMMERCIAL URBAN VEHICLES
Submission Author:
Rafael Rivelino da Silva Bravo , RS
Co-Authors:
Rafael Rivelino da Silva Bravo, Artur Tozzi de Cantuaria Gama, Amir Antonio Martins Oliveira, Victor Juliano De Negri
Presenter: Artur Tozzi de Cantuaria Gama
doi://10.26678/ABCM.COBEM2017.COB17-1787
Abstract
This article presents a new concept of hybrid powertrain for commercial vehicles. The proposed system is comprised of a hydraulic system integrated to a pneumatic system, which enables the conversion of braking energy into potential energy. Unlike the current hybrid-hydraulic systems, the hybrid vehicle concept presented herein adds a pneumatic system for the production of compressed air. Compressed air can be used to supply the pneumatic auxiliary devices of the vehicle such as brakes, chassis suspension, doors opening and closing, among other applications. In addition, the proposed design has greater energy storage capacity compared to the volumetric capacity of hydraulic accumulators, usually characterized by their low energy density. In this context, the dynamic simulation responses of a hybrid bus are shown in similar conditions to that found in urban driving cycle. During the deceleration, the hydraulic-pneumatic system is used as a regenerative braking system and, during the increase of speed the hybrid system assists the engine in the acceleration work. The results show that the proposed hybridization generates fuel economy for the vehicle above 10 % and that regenerative braking is able to provide compressed air network autonomy.
Keywords
Hybrid Commercial Vehicles., Hybrid-Hydraulic Systems, Hybrid-Pneumatic Systems., Hybrid-Hydropneumatic Systems.
