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.

Study on Braking Force Distribution of Electric Vehicles

Abstract: Braking force distribution of an electric vehicle has an important impact on braking performance and energy recovery. With the analysis of braking dynamics and the establishment of motor model, a braking force distribution strategy is proposed from the viewpoint of maximum energy recovery. From another point of view, how to distribute the braking force can be thought as a constrained optimization problem, in which the motor maximum power, the motor maximum angular speed and the requirements of vehicle stability are all taken into account. The task is to find the optimal distribution ratio of the regenerative braking torque and the friction braking torque so that the regenerated energy can be maximized. Genetic algorithm is used to solve the optimization problem. The simulation results show that the braking force distribution by optimization is in accordance with the proposed braking force distribution strategy. The strategy takes advantage of the motor maximum torque and can obtain maximum energy recovery.

Method for determining the start of an automatic braking process

Abstract: The invention relates to a method for determining the start of an automatic braking process. In those instances where the brake pedal is actuated starting from an initially unactuated position, triggering of automatic braking occurs when the actuation speed of the brake pedal remains above a threshold trigger value for automatic braking, and a prescribed pedal travel is exceeded in a specific time interval after the start of the actuation of the brake pedal. Light depression of the brake pedal which takes place only briefly at a high pedal actuation speed does not lead to the automatic braking process being triggered.

Hybrid drive system with regeneration for motor vehicles and the like

Abstract: A hybrid motor vehicle includes a storage battery providing motive power to an electric motor under the control of a microprocessor. A generator with an internal combustion engine may be used to charge the storage battery. The motor is operated either in an actuated mode in which current flows from the battery and a dynamic braking mode in which regenerated current flows from the motor to the battery. Electronic circuitry is used to insure that regenerative current is generated even if the motor Emf is lower than the voltage of the storage battery.

Driving/braking force controller for vehicle

Abstract: PROBLEM TO BE SOLVED: To provide a controller achieving driving/braking force and yaw moment which are as close to driving/braking force and yaw moment that a vehicle needs to have as possible and suitable to the state of driving operation of a driver. SOLUTION: Target driving/braking force Fvn that the vehicle needs to have and the target yaw moment Mvn of the vehicle are calculated (S20). When one of the targets can not be achieved with the driving/braking force of respective wheels (S40), a distribution ratio K is calculated (S60) so that it will be smaller as a value indicating an accelerating/decelerating operation by the driver is larger and larger as a value indicating a steering operation by the driver is larger, and the straight line L which is closest to a point P of the target driving/braking force Fvn and target yaw moment Mvn is specified among the out lines of a quadrilateral 100 showing a range of driving/braking force and yaw moment which can be achieved with the driving/braking force of the respective wheels (S80), so that values of coordinates of a target point R as an internal division point on the straight line L based upon the distribution ratio K are regarded as target driving/braking force Fvt and target yaw moment Mvt after correction (S90, S100). COPYRIGHT: (C)2006,JPO&NCIPI