An Investigation on the Effect of Using Regenerative Braking System on Energy Consumption Reduction of Hybrid Vehicles Based on Tehran City Driving Cycle

In driving and when you brake, a lot of energy is dissipated to stop the car; especially in urban areas where the vehicle is driving in a stop-and-go pattern. This energy, which is dissipated by the brake pads, can be stored in the vehicle's battery. In Hybrid and Electric Vehicles, a regenerative brake can be used alongside the mechanical brakes to regenerate some energy while braking. The purpose of this article is to investigate the appropriate time to use the regenerative brake, the amount of energy recoverable versus the vehicle's speed, braking power and deceleration rate, the amount of energy on front and rear axles, to investigate the braking power to meet the two requirements of providing the required brake force and not locking the wheels (not to slide the wheels) and to investigate two parallel and fully controlled hybrid braking systems. To this end, a Dena hybrid vehicle was used and the recovered energy during Europe and Tehran city driving cycles was computed and compared with each other. The results shows a significant and efficient effect of the use of the regenerative brake system to utilize the braking energy and consequently the energy consumption reduction for the hybrid vehicles in Tehran city driving.