chuntington101

ok i have been looking at a few WW2 aircraft recently and came cacross some very intresting stuff that came about just after WW2. in the late 1940's jet engines where just starting to come in. this was fine for the air force but airliners still wanted to run tried and tested units.

anyway they came up with some very novel systems to recover the power that you would normally throw out the exhaust.

basically they ran turbines (like on a turbo) that where geard back to the crank! these systems used the exhaust gas to drive them and where able to recover upto 20% of the power form the engine that would normally be pump out the exhaust pipe!

i was wondering, could this kind of system be used on modern car engines? also it could make the engines "greener" as you would need less power, and thus fuel, when crusing around.

i know its got a lot of peoblems, packaging being the biggest problem these days, but it has to be better than all the stupid hybrid cars out there!!!

thanks Chris

Thomas

I have heard of recent experiments using a jet engine to spin an electric turbo generator that powers electric motors as well as charges backup batteries...

1989GTA

Yep, they were called "power recovery turbines". They used the exhaust gas energy to spin the turbines that are connected to the crankshaft.

I think the better idea for a couple of reasons is to use the exhaust gas to spin a supercharger for increased power.

trumperZ06

Or a tubro-charger !!!

If memory serves... the German ME 109 used a tubro-charged engine along with fuel injection back in WW 2.



Jet engines are currently being used to power generators... GE has complete systems available for industrial use.

chuntington101

thanks guys.

so there is no real use on a car or truck???

take it its just better to run a boosted engine.

thanks Chris.

PS. i was reading that some rolls royce didn't want to go turbo on their aircraft becuase they would lose the trust they got from the exhaust stacks! how cool is that! lol

chuntington101

no the 109 ran a hydraulic clutched SC. think they did run injection though. think there was even direct injection going to be introduced to some american engines. for some reason it never made it to production.

Chris,

HSV-GTS-300

Google "turbocompounding"
Scania, Cummins & Holset have done a ton of work over the past 20 years on using a power turbine downstream of a turbocharger.
http://www.holset.co.uk/files/2_5_1_...d%20system.php

The added complexity has not made it a viable proposition until recent years when more stringent emmision laws and new complex electronic controls have appeared.

http://findarticles.com/p/articles/m...67/ai_81147055

trumperZ06

Sorry... the ME 109 DB605 engine did use a supercharger with direct fuel injection.

Some Allied aircraft used turbo-charged engines in WW 2.

The DB605 engines (later models) were fitted with methanol/water or nitrous-oxide injection for additional power.

laxmax44@

probably not the best idea for a car, youd be better off just running a turbo. but yes, jet engine powered generators are around. the USAF has tons of them we use to provide electricty or bleed air to aircraft.

Ping King

iTrader: (20)

http://www.autoweek.com/apps/pbcs.dl...THISWEEKSISSUE

Or that