Throttle wins system

[jakobnev]

The idea is to use the exhausts to heat the incoming air. The air is then passed through a variable axial turbine that acts as the throttle plate. Then through an inter cooler.

The power produced could be used either for generating electricity, or geared down and sent to the crank.

[dcb]

Then Lancelot, Galahad and I wait until nightfall and then leap out of the rabbit

[drmiller100]

i have always wondered why we don't put an alternator on a turbo charger exhaust to generate electricity.

[dcb]

There are some, see post 18 in this thread Turbo-Charged Alternator

[jakobnev]

Originally Posted by dcb

Then Lancelot, Galahad and I wait until nightfall and then leap out of the rabbit

Maybe you'd care to elaborate on how this relates?

[dcb]

where does the energy to turn the turbine come from and under what operating conditions? How is this better than direct injection with no throttle? I guess it doesn't make much sense without more explanation.

[jakobnev]

The turbine is powered by vacuum from the engine at low to moderate loads. (I drew an engine by forgot to mention it i guess) The available energy is further boosted by heating the air before it enters the turbine with heat otherwise lost in the exhausts from the ICE.

The turbine replaces the throttle plate and performs all the air restriction necessary for partial load operation of the ICE.

[pete c]

Originally Posted by jakobnev

Maybe you'd care to elaborate on how this relates?

Not a monty python fan, I take it?

[pete c]

I actually like this idea assuming varying the drag on the turbine can give you respectable throttle response. I suspect it might not.

[dcb]

just wondering:

why do you think heating the air will make the turbine extract more energy in this case?

How does changing the angle of attack on the turbine blades effect turbine efficiency?

Can you have a turbine that can restrict air down to idle demands while providing sufficient full throttle airflow?

And of course there are enumerable energy conversions going on as well with losses, from the throttle plate pumping losses (and intercooler fan and extra weight/complexity/cost). I don't see how it could stack up to eliminating those losses (i.e. direct injection or pulse and glide).

As pete notes, you may need a somewhat sophisticated controller for your variable vanes for ok throttle response. It needs to know the rpm of the turbine (and etc) and adjust accordingly to the gas pedal

fwiw I did pick up on the engine and the brown exhaust.

Am I missing something here? Maybe a giant wooden badger would help? (Just kidding )