Fuel & fuel saving devices

[charlay86]

lol If GM-H could just fit a bunch of magnets and crystals to their cars to enhance performance and handling I'm sure they would, sounds a lot cheaper than real engineering.

if you want to save fuel you could run leaner AFR and use water injection (which can help to lower NOx too due to lower combustion temps).

Most people can't adjust their mixture on modern cars so I can't see a product like that being of much benefit.
If it heats the intake air to lower its density that would certainly decrease the charge density, but most engine management systems will add in extra fuel to cool the hot charge air and pull timing.

[festy]

a device called the "Energy Polariser" containing crystals and magnets in an epoxy resin

Well I made my own version of the Polariser using an epoxy resin, fitted it directly to my fuel tank and can show beyond any doubt that it has improved my fuel economy.







That might have something to do with where I fitted it, placing the epoxy directly over the hole in the bottom of the tank where the fuel was leaking out

[vlad01]

here you go.

http://www.ebay.com.au/itm/Magnetic-Pow ... 4ab2686ffd

[antus]

awesome, greater oxidisation, just what we all need!

[V8hilux]

I've wondered about one of those hydrogen bubble generators... it might work a small amount if you built a steam generating heat exchanger around the exhaust system to run a small steam engine in the boot that spun a generator to power the hydrogen bubbler... then you'd have the extra weight to haul. maybe on a stationary engine might work.

[Holden202T]

[antus]

Theres other, better documented ways to recover heat energy from the exhaust that I'd prefer to go with.

http://en.wikipedia.org/wiki/Turbocharger
"A turbocharger may also be used to increase fuel efficiency without increasing power.[21] This is achieved by recovering waste energy in the exhaust and feeding it back into the engine intake. By using this otherwise wasted energy to increase the mass of air, it becomes easier to ensure that all fuel is burned before being vented at the start of the exhaust stage. The increased temperature from the higher pressure gives a higher Carnot efficiency."

I'll take that one, thanks.

[Holden202T]

i'll stick with a turbo, that's the best way to re-use the energy

[Circlotron]

4: As a result, your vehicles fuel is now burnt entirely so your engine consumes less of it during your journey.
I would assume that for a 20% increase in economy then 20% of the injected fuel is coming out the tail pipes and this will make it burn

The fact is, a good modern engine burns about 98% of the fuel. The 2% remainder gets cleaned up by the cat. Consider this: a 100kW engine going full noise uses about 300kW worth of fuel. The unburned 2% of that = 6kW which is part of what makes the cat get hot as it is doing it's job. If it had to deal with 20% unburned fuel, that's 60kW it would have to burn off besides the heat of the incoming exhaust stream. It would melt clean off the exhaust system in about 20 seconds. On a good, modern, homogenous charge standard engine there is almost zero margin for improving combustion.

Many people say a car engine is very wasteful and inefficient and so it is. The thing to remember is an engine doesn't convert fuel straight to mechanical power. It converts fuel to heat as mentioned with about 98% efficiency. But turning that heat into mechanical power is where the wheels fall off, not in poor combustion. 1/3 goes out the radiator and 1/3 goes out that blazing hot exhaust. Only 1/3 at best is left over to paint black lines up and down your street. This lop-sided distribution of energy is where the big gains are to be had, if at all possible. http://en.wikipedia.org/wiki/Carnot_eff ... Efficiency All part of "the cussedness of nature".

[vlad01]

thats where this comes in.

http://revetec.com/index.html