A novel dual function pneumatic valve for blending braking system and control strategies

For urban electric bus, due to its operating conditions and relatively large vehicle weight, a IoT of energy is lost during braking, so it is very important to develop advanced braking energy recovery system. In this paper, an electromechanical double-acting pneumatic brake was designed by adding the electromagnet structure based on a parallel dual-chamber pneumatic brake, and then made the designed valve as the actuator of pneumatic brake system, and the scheme of pneumatic composite braking system based BBW was designed. To maximize energy recovery, the composite brake control strategy based on maximizing energy recovery was established, making full use of the regenerative braking force provided by the motor. In ADVISOR software, the designed regenerative braking model in this paper was loaded into the default EV module, the energy recovery of electric buses was analyzed in different cyclic conditions.