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.

Regenerative braking system for hybrid electric vehicle

Abstract: A regenerative braking system for a hybrid electric vehicle 10 comprises an engine 14, a geared electric motor-generator or transaxle assembly 16 and a transmission assembly 18 which selectively receives torque from the engine 14 and the motor-generator assembly 16, and which delivers an output torque to a pair of road wheels 26,28. The engine 14 is connected to the transmission 18 by a clutch 20, which the system disconnects during certain braking events. This allows a maximum amount of energy to be recovered by eliminating engine drag. The motor-generator assembly 16 simulates engine drag, thus providing a driver of the vehicle 10 with a consistent feel during all operating modes. The powertrain configuration is typically a parallel hybrid front wheel drive system. The braking system interfaces with a friction brake system and preferably responds to inputs such as an accelerator pedal position, vehicle speed and battery 34 charge level.

Electronic braking system with system test

Abstract: An electronic braking system for a multi-axle road vehicle, having a foot-operable braking transducer (12) which generates electrical braking demand signals (D) representative of a driver's braking demand, load transducers (18,36) which generate electrical load signals (L) representative of the respective load on different axles of the vehicle, and an electronic controller (10) which receives the braking demand signals (D) and load signals (L) and generates electrical output signals (B) for controlling the operation of braking devices (16,34) for the wheels carried by axles, the controller (10) including a load compensation device (90) which acts to modify the output signal (B) of the controller (10) to the various braking devices so as to take account of prevailing loads on the respective axles. The system can be brought into a test mode wherein in place of the electrical braking demand signals (D) representative of driver braking demand, a preset standard braking input demand (D F ) is applied to the controller whereby the system generates for testing purposes compensated braking pressure which take into account the operating values of the axle loads.

A new braking force distribution strategy for electric vehicle based on regenerative braking strength continuity

Abstract: Regenerative braking was the process of converting the kinetic energy and potential energy, which were stored in the vehicle body when vehicle braked or went downhill, into electrical energy and storing it into battery. The problem on how to distribute braking forces of front wheel and rear wheel for electric vehicles with four-wheel drive was more complex than that for electric vehicles with front-wheel drive or rear-wheel drive. In this work, the frictional braking forces distribution curve of front wheel and rear wheel is determined by optimizing the braking force distribution curve of hydraulic proportional-adjustable valve, and then the safety brake range is obtained correspondingly. A new braking force distribution strategy based on regenerative braking strength continuity is proposed to solve the braking force distribution problem for electric vehicles with four-wheel drive. Highway fuel economy test (HWFET) driving condition is used to provide the speed signals, the braking force equations of front wheel and rear wheel are expressed with linear equations. The feasibility, effectiveness, and practicality of the new braking force distribution strategy based on regenerative braking strength continuity are verified by regenerative braking strength simulation curve and braking force distribution simulation curves of front wheel and rear wheel. The proposed strategy is simple in structure, easy to be implemented and worthy being spread.

Braking Deceleration Measurement Using the Video Analysis of Motions by Sw Tracker

Abstract: Abstract This contribution deals with the issue of car braking, particularly with the one of M1 category. Braking deceleration measurement of the vehicle Mazda 3 MPS was carried out by the declerograph XL MeterTM Pro. The main aim of the contribution is to perform comparison of the process of braking deceleration between the decelograph and the new alternative method of video analysis and to subsequently examine these processes. The test took place at the Rosina airfield, the airstrip in a small village nearby the town of Žilina. The last part of this paper presents the results, evlauation and comparison of the measurements carried out.