The requirements imposed on the brake system of a Battery Electric Vehicle (BEV); above all the requirements imposed on the recuperative capacity of the system for maximum energy recovery, are constantly increasing. Energy recovery, not just in the usual form as a major contribution to energy efficiency and increasing the range in day-to-day operation, but rather in this case – which is typical of Porsche, using the first electric Porsche sports car, the Taycan as the example – this also extends to the limits of driving dynamics, under extremely high lateral acceleration and during ABS control. Thus recuperation is a very large and important contributor to thermal offload of the wheel brake on the one hand, but also towards increasing the drivable number of laps until the next charging procedure, on the other hand. The demand is to allow the interactions of the various deceleration actuators (friction brake and electric motor) required in this regard, to run in the best manner possible, unnoticed by the driver. This applies equally in the context of "requirements for racing circuit driving", and to the objective of a brake pedal feel that is as natural as possible, such as retention of the haptic ABS pressure point relative to pedal force and pedal travel, as well as to the challenge of minimal influence on front-axle to rear-axle braking force distribution, so as not to disadvantageously influence the driving dynamics that are customary and typical for Porsche. In the article below – after a brief description of drive system and chassis – the recuperative brake system for combined braking of the Porsche Taycan will be presented in detail. This includes all participating components, from the pedal system to the brake actuation system and the recuperation strategy and on through to the wheel brake. In this regard a technical description of the lightweight design concepts and technologies that are used will be provided.
Porsche Taycan - recuperative brake system for combined braking
Proceedings
2021-06-15
7 pages
Article/Chapter (Book)
Electronic Resource
English
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