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Using the concept of push-back toy car in a real car to save fuel

The wastage of fuel in a traffic jam is significant for any car.Often the traffic moves at snail's pace and we have to put the car on driving slowly for quite a time for a short distance.

What if we can actually drive the car for a mile or two even if the engine is off?

This is where the concept of rewinding comes in,The toy car is winded back and goes forward and when stopped it pauses and then it goes forward again when left.

we may actually use this concept in a real car so that when the car moves on engine power it is also wound back.So when there is a traffic jam the engine is off and the movement is done by the unwinding thus saving fuel!

  • Sep 15 2013: Lejan makes a good point about flywheels. They have been used from almost the beginning of the steam engines back in the 19th century. They have been upgraded and it looks like it will be in buses/trucks soon and in passenger cars within 5-10 years. The flywheels are being used in Formula 1 racers.

    Here is an interesting article that the BBC published and had a special on in July 2013.
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      Sep 15 2013: Thank you, I had not read the f1 articles.
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    Sep 15 2013: I have owned a eclectic car for some years now. There have been many modification's to extend its range. You have struck on one that I have give much thought to. The highest load on the battery pack is getting the weight moving from a dead stop. So a spring assist just to get the weight moving would have a large impact on over all range. As Lejan stated using the battery to wind the spring would only be a tradeoff therefore your not gaining anything. But what if the spring was wound under breaking or deceleration as Volvo did.. My expanded view of this idea also uses a flywheel driven by a spring under braking and the deceleration. But how to Apply it to my Car?
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    Sep 14 2013: Volvo Flywheel KERS (Kinetic Energy Recovery System)

    The winding of a coil spring takes engine power as well and therefore doesn't save energy (fuel).

    Volvo's concept and such alike transforms braking energy into kinetic energy of a flywheel energy storage, which then reduces fuel consumption while it helps to accelerate the car again.

    In traffic jams this won't help much either, at least, not for long ...