Dynamic braking

About: Dynamic braking is a research topic. Over the lifetime, 3472 publications have been published within this topic receiving 34897 citations. The topic is also known as: Rheostatic brake.

A regenerative braking control strategy for electric vehicle with four in-wheel motors

Abstract: Regenerative braking control technology of electric vehicle plays a vital role in automotive energy-saving and environmental protection. Actually, there are two important aspects included in regenerative braking control. First and foremost is to maintain the vehicle safety during the braking process, and secondly is to maximize the energy recovery and minimize the energy consumption as far as possible. This paper proposes a regenerative braking control strategy to meet the above two aspects. In this research, the electric vehicle is assumed to keep straight line driving with a driver. First, according to the desired braking torques of the driver during braking process, the brake torque on front and rear axle respectively are allocated based on the tire load ratio, which makes sure that maximizing the use of tire adhesion during deceleration. Second, in order to deal with multi-objections and constraints for maximizing the energy recovery and minimizing the energy consumption, an model predictive controller is designed to distribute the brake torque between the hydraulic brake mode and the electric motor brake mode. In the end, the effectiveness of the proposed strategy is verified through the simulations of the electric vehicle model with four individually driven in-wheel motors based on Matlab/Simulink and AMESim software.

Design and implementation of a regenerative braking system for electric bicycles based on DSP

Abstract: This paper proposes a regenerative braking system for electric bicycle based on DSP. The proposed method is used to adjust the switching sequence of the inverter, so that the braking energy will be returned to charge the battery. With the cooperation of regenerative braking energy recovery technologies and digital signal processor (TMS320LF2407) as the control unit, the regenerative braking energy is transformed to electrical energy and then returns to battery. The recovered energy can increase the driving endurance of the electric vehicles.

Brake control device of electric vehicle

Abstract: PROBLEM TO BE SOLVED: To restrain the change in the vehicle attitude caused by the change in braking force distribution with respect to the brake control device of an electric vehicle. SOLUTION: In a period A till time ta, regenerative braking force equal to required braking force FREQ is generated by regenerative priority control. When it is judged that hydraulic priority control is to be started because of lowering in vehicle speed, for example, at time ta, the current control is switched to hydraulic priority control in a period B. In the period B, the regenerative braking force FG for front wheels is reduced at an inclination rate of δ2, and the hydraulic braking force FII for the front wheels is increased at the same inclination rate of δ2. When regenerative braking force FG becomes zero at time tb, the switching to hydraulic priority control completes.

Method for terminating a braking intervention of an adaptive cruise control system of a motor vehicle

Abstract: A method for terminating a braking intervention of an adaptive cruise control system of a motor vehicle. The braking intervention is terminated in accordance with a predefined algorithm in response to the driver overriding of the adaptive cruise control system. In this context, the algorithm is formed in such a manner that a jerk-free transition from braking to acceleration of the motor vehicle is ensured, thus increasing the ride comfort. The transition from braking to acceleration preferably takes place in accordance with a linear function. Provision can also be made for stepwise functions. To prevent the braking operation from being terminated prematurely by an inadvertent actuation of the accelerator, provision is made for a threshold value to be adjusted for the accelerator for a desire of the driver to accelerate. This threshold value is dependent on the deceleration during braking. The higher the braking deceleration is, the more heavily the driver must operate the accelerator to initiate the acceleration process. In the case of a low deceleration, the threshold value is lower, so that it suffices to step more lightly on the accelerator to bring about an acceleration of the motor vehicle.

Safety braking control for a vehicle that is responsive to hard braking by a driver of the vehicle

Abstract: A safety braking control for use with a vehicle for providing a visual warning of hard braking to a rearwardly positioned driver of another vehicle, the safety braking control includes an electrical hydraulic pressure transducer forming an analog electrical signal between the hydraulic braking system of the vehicle and a brake light control mechanism providing a significant electrical signal when hydraulic braking pressure is low and a lesser electrical signal when the hydraulic braking pressure is high; a brake light control mechanism in the electrical circuit between the vehicle foot pedal brake switch and vehicle brake lights, the brake light control mechanism having a normal braking mode of operation for allowing the vehicle brake lights to be constantly illuminated upon receipt of a higher electric signal from the transducer and a hard braking mode of operation for allowing the vehicle brake lights to be rapidly flashed upon receipt of a determined lesser electrical signal from the transducer.