"The Natural Philosopher" wrote in message
...

There are far more efficient diesel and gasoline
engines around, and are running.


Sadly these would require huge changes
in engine factories, costing huge
amounts of money.

These new engines require no more than existing technology and engineering
tools.

These can be developed fully and integrated into a hybrid setup.
Another method suggested is waste heat from an advanced rotary engine
(not
an inefficient Wankel design) which has well over 50% efficiency,
driving a
small Stirling engine from its waste heat, which drives a compressor,
which
charges an air tank. The compressed air assists drive via an air motor
in a
hybrid setup. This is a fine stop gap, and around town the car can run
on
non-polluting air, which is generated from what would have been wasted
heat.
The whole setup can be small in size as rotary engines are small and a
compressor/air motors is also small. The compressor can also be the
starter
motor too.

hugely complicated and expensive.

No more complicated than an existing hybrid. Expense will be cheap when
production is up and running.

You could simply have a smaller engine that charges the batteries.

Been tried. Not feasible as yet.



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