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Modular Systems for Energy Conservation and Efficiency
Published in Yatish T. Shah, Modular Systems for Energy Usage Management, 2020
Another concept that has been developing over the years is a kinetic energy recovery system, often known simply as KERS. KERS is an automotive system for recovering a moving vehicle’s kinetic energy under braking. The recovered energy is stored in a reservoir (for example a flywheel or a battery or super-capacitor which are all modular in nature) for later use under acceleration. Electrical systems use a motor-generator incorporated in the car’s transmission which converts mechanical energy into electrical energy and vice versa. Once the energy has been harnessed, it is stored in a battery and released when required. The mechanical KERS system utilizes flywheel technology to recover and store a moving vehicle’s kinetic energy which is otherwise wasted when the vehicle is decelerated. Compared to the alternative of electrical-battery systems, the mechanical KERS system provides a significantly more compact, efficient, lighter, and environmental-friendly solution. There is one other option available, i.e. hydraulic KERS, where braking energy is used to accumulate hydraulic pressure which is then sent to the wheels when required.
Batteries
Published in Tom Denton, Electric and Hybrid Vehicles, 2020
KERS captures and stores energy that is otherwise lost during vehicle deceleration events. As the vehicle slows, kinetic energy is recovered through the KERS continuously variable transmission (CVT) or clutched transmission (CFT) and stored by accelerating a flywheel. As the vehicle gathers speed, energy is released from the flywheel, via the CVT or CFT, back into the driveline. Using this stored energy to reaccelerate the vehicle in place of energy from the engine reduces engine fuel consumption and CO2 emissions.
Comparative Ratings and Properties
Published in Alfred Rufer, Energy Storage, 2017
The kinetic energy recovery system (KERS) is a power assistance system based on the recovery of a moving vehicle’s kinetic energy under braking (Figure 3.23). The recovered energy is stored in a reservoir for later reuse under acceleration. Such systems have been developed for race cars based on different storage technologies. A first example using supercapacitors is described in Reference 13 and was developed under the label of “Formula S2000.”
Modelling and analysis of a gyrostat elastically attached to a vehicle
Published in Vehicle System Dynamics, 2018
Andreas Zwölfer, Günter Bischof
In the simulations to follow in this paper, flywheel dimensions which do not differ much from the Flybrid Systems specifications [2] (see Table 2) have been adopted. KERS of this type are going to be increasingly used in mass produced road vehicles. The spin axis of the flywheel is vertically aligned in all simulations.