Brake energy recovery, its types and the possibility of application on domestic cars

Abstract

Introduction. The most important part of a car is the brake system. Road traffic safety and, most importantly, people’s lives depend on the proper operation of the brake system. The development of brake energy recovery system allows increasing the service life of the brake system and increasing its resistance to overheating.
Materials and methods. This paper examines regenerative braking types. The KERS (Kinetic Energy Recovery System) system and its types, recuperation of braking energy via a kinetic flywheel and a motor generator have been considered. The paper examines hydraulic recuperation or Hybrid Air system, and calculates the regenerative power of a kinetic flywheel as applied to domestic cars.
Results. It is assumed that for the implementation of the recovery system in domestic cars, it is more profitable to use mechanical recovery, since it is cheaper than other types, easier to install and manufacture. Recovering braking energy via a kinetic flywheel leads to about 7 horsepower delivered to the car wheels. The remaining energy is spent on spinning the flywheel and losses in the system mechanisms associated with transmission from the flywheel to the wheels. The energy that was previously spent on heating the brake discs and brake pads is now spent on spinning the flywheel, thereby reducing the temperature of the braking system mechanisms.
Discussion and conclusions. In the course of the analysis of design and technological solutions, as well as the calculations performed, it can be concluded that the use of a kinetic recuperative system on the LADA KALINA-2 vehicle under study will allow an additional 7 horsepower to be obtained in the city cycle of vehicle operation during 6 seconds of operation of the recuperative system.