since auto braking is the worlds largest source of kinetic energy why are auto makers blind to this?

Question

Charging batteries ect...

Answer 1

Some cars do take advantage of the car's kinetic energy while braking in order to recharge batteries or do some other form of work. It is often used in hybrid type cars which are designed to get such great city driving gas mileage (but have pretty average highway driving mileage) since the car tries to conserve as much of the energy of possible when stopping.

By converting the car's kinetic energy into some other form of energy (be it chemical potential, or what-have-you), that energy can be stored for later use.
Remember, no energy conversion is/will ever be 100% efficient, there will always be some loss.

It is not always possible/practical do implement this type of feature in every situation. For example, if you have to slam on your breaks and stop the car ASAP, you dont have time to wait for a generator to charge up a battery, it would be "better" to just "Waste" the energy and transfer it into heat.

Answer 2

The worlds largest source of kinetic energy is in a car??? Who on earth told you that?????
I've never heard so much bollocks!!!
What about the kinetic energy of tides, winds or even the rotation of the earth.. bit of energy tied up there.
What is the point of extracting energy from decelleration of vehicles when around 60+% of the fossil fuel they burnt is wasted energy????
Yeah.. you could put a massive fly wheel into a car, say about one tonne and it would effectively eat up the kinetic energy in braking, but the extra energy used to get the car running????

Answer 3

would require a tremendous amount of energy to operate correctly or the answer is more political than mechanical.

just a guess