Transmission technology specialist Xtrac says the flywheel kinetic energy recovery systems (KERS) currently being developed for Formula One could be applied to road vehicles in a number of ways.
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“By providing an additional boost of power, the F1 technology is particularly relevant to the trend to fit cars with smaller engines in pursuit of better fuel efficiency and lower CO2 output,” said technical director Adrian Moore.
“The technical challenge with engine downsizing is compensating for the loss of engine torque and driveability, which can be restored by applying flywheel technology. It is also possible that a mechanical KERS system could be used as a range extender in a battery electric hybrid vehicle or even to power vehicle auxiliaries.”
“All are potential applications of the technology, subject to the size of the flywheel, compactness of the system and vehicle packaging requirements. These are all resolvable technical issues. The intent of the KERS technology in F1 is to consider energy recovery, storage and discharge, and to demonstrate that technology in a novel and effective way.”
Complementing its work in F1, the transmission technology provider is also an active partner in a new project to develop a flywheel hybrid system for premium cars. Xtrac forms part of a consortium supported by the UK government’s Technology Strategy Board, which recently announced funding of GBP23m for 16 innovative low carbon vehicle development projects.
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By GlobalDataThe flywheel hybrid project will involve the design and development of a mechanical KERS system for use in a premium segment passenger car as an alternative solution to other hybrid systems and to prove its effectiveness and viability for production.
Jaguar is leading the project, which will be carried out by a consortium made up of Flybrid Systems, Ford, Prodrive, Ricardo, Torotrak and Xtrac.
The energy recovery rate and storage requirements of a flywheel for a road car could be considerably less than that required in F1 where the energy which can be recovered from 5g braking is significant.
As the flywheel is required to be charged, some preliminary motion may be required; though road cars could store energy in the flywheel directly from the engine, which is not currently permissible under F1 regulations.
