Advertisement

Jaguar Tests Flywheel Hybrid System Just Like Racing Porsche

Follow John

Since Ford sold Jaguar Land Rover to Indian carmaker Tata in TK, the luxury maker has stepped out a bit.

Their green efforts have taken down several interesting technology paths that seem unlikely had they stayed underneath the Blue Oval of Dearborn.

The latest to surface is a demonstration vehicle that uses a Formula 1-style Kinetic Energy Recovery System to store energy that would otherwise have been wasted as brake heat.

Regenerative braking--like that of a conventional hybrid-electric vehicle like the Toyota Prius--is used to produce electricity via a generator connected to the road wheels, but instead of being stored in a battery pack, that energy is used to spin a lightweight flywheel.

Then, when extra boost is needed, the spinning flywheel is used to drive the generator in reverse, as an electric motor, to contribute torque that supplements that from the engine. Note that this is a conventional hybrid of two different torque providers, not an electric vehicle; it cannot run solely on electricity.

The system was shown in a 2010 Jaguar XF demonstrator vehicle displayed this week at the Low Carbon Vehicle event at England's famous Millbrook testing grounds.

Jaguar calls the system its "flywheel hybrid system for premium vehicles" (FHSPV)--we suggest a new and catchier name--and says it can raise the XF's fuel efficiency by 20 percent and add a full 80 horsepower (60 kilowatts).

The same flywheel hybrid system is used not in a luxury sports sedan but an out-and-out track racer, the Porsche 911 GT3 R Hybrid, which will make its first U.S. appearance in competition at the end of the month in the Petit Le Mans race at Road Atlanta. Porsche race driver Patrick Long, for one, loves the car's speed.

As well as a hybrid built around the flywheel system, the company has explored a range-extended electric vehicle design for its XJ full-size luxury sedan, under the Jaguar "LimoGreen" research program.

As well as a small, highly efficient Lotus three-cylinder, 1.2-liter Range Extender engine-and-generator set as a range extender, Jaguar is also experimenting with microturbines that dispense with gasoline engines altogether.

The new FHSPV system is a joint effort among many partners: not only Jaguar, but Flybrid Systems, Prodrive, Ricardo, Torotrak, and Xtrac. Oh yeah, and Ford's in there too. Hmmmmmm.

[Jaguar, Torotrak via Motor Authority]

Advertisement
 
Follow Us

 

Have an opinion?

  • Posting indicates you have read this site's Privacy Policy and Terms of Use
  • Notify me when there are more comments
Comments (3)
  1. Hi John,
    You write that the Jaguar FHSPV XF demonstrator uses the same system as the Porsche 911 GT3 R Hybrid.
    However, it seems that the Porsche uses the Williams Hybrid Power flywheel system, not the Flybrid system.
    http://www.autoblog.com/2010/02/11/videos-porsche-911-gt3-r-hybrid-uses-williams-f1-flywheel-kers/
    Similar, but not the same.
    The Williams Hybrid Power system converts the vehicle kinetic energy to electrical energy, then drives an electric motor/generator to spin up the flywheel. To extract the energy again, the flywheel generates electrical energy again, which is used to drive a gearbox-mounted motor/generator.
    The complete energy round-trip involves 4 energy conversions.
    The Flybrid system uses a CVT to transfer the vehicle kinetic energy directly to kinetic energy in the flywheel, and vice versa.
    The energy round-trip involves ZERO energy conversion, just 2 energy transfers.
    Energy transfer : Efficient
    Energy conversion : Inefficient
    Regards
    Mick O'Neill
     
    Post Reply
    Vote
    Bad stuff?

  2. @Mick: Many thanks for the distinction. Clearly an area for more articles!
     
    Post Reply
    Vote
    Bad stuff?

  3. hi everybody,
    I would like to know if you were told about gyroscopic effect stems from rotation of the flywheel.
    thanks you.
    Antoine
     
    Post Reply
    Vote
    Bad stuff?

 

Have an opinion? Join the conversation!

Advertisement
Advertisement

Find Green Cars

Go!

Advertisement

 
© 2014 Green Car Reports. All Rights Reserved. Green Car Reports is published by High Gear Media. Send us feedback. Stock photography by izmo, Inc.