The Crower six stroke engine

the most fuel efficient engine I've ever heard of.
http://en.wikipedia.org/wiki/Crower_six_stroke
http://www.autoweek.com/apps/pbcs.dll/article?AID=/20060227/FREE/302270007/10...

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• crower

[Blondets1]

with a potential of 1600 expansion rate for steam who says that you would need an equal amount of water. it may take less water to match the power stroke of gas/diesel and since the water is heated it them becomes a fuel source

[ekid2k]

I doubt the temperatures my engine runs at are high enough to reach that potential, but I'm just trusting information that seems to have come from the guy who built a prototype.

[VanDeGraaff]

...Witch is only possible with computer controlled electric/hydraulic/pneumatic valves and common rail injection. And this tecnology already exist.

This is not a pliable system for cars and other vehicle engines. But it could well be a major breakthrough for ships and stationary engines like generators, fuel consumption and cooling are major headaches for these engines.

[ekid2k]

are you saying the 6 stroke engine or just the diesel version isn't apply-able to cars?

or are you just saying it's not as necessary for shit that's moving because it has all that air rushing past it to help it cool?

[ismokewead420]

this guy thinks water pumps and radiator fans were a horrible waste of energy....don't even get me started on air-cooled flathead(L-head/side-valve) engines....used on everything from lawnmowers to welders.

[aubreyholman]

Maybe we could upgrade the cooling systems of vehicles into a high-pressure system which could expand and contract turning a steam turbine which could be used to power the alternator and possible a/c compressor? take the load off the engine and use the heat for accessories. Of course again it would count on the vehicle running at high temp in order to work. Then again what does that take.... five minutes of normal operation? Ten? Twenty? Anyone?

[aubreyholman]

Maybe we could upgrade the cooling systems of vehicles into a high-pressure system which could expand and contract with a steam turbine which could be used to power the alternator and possible a/c compressor? take the load off the engine and use the heat for accessories. Of course again it would count on the vehicle running at high temp in order to work. Then again what does that take.... five minutes of normal operation? Ten? Twenty? Anyone?

[josephdupont]

it makes a lot of sense..

so how much water would you need per hour per horse power.

I have a feeling that it would be a lot.

One boiler horse power unit or BHP is equal to a boiler thermal output of 33,475 BTU/h (9.8095 kW), which is the energy rate needed to evaporate 34.5 lb (15.65 kg) of water at 212 °F (100 °C) in one hour.

[josephdupont]

it makes a lot of sense..

so how much water would you need per hour per horse power.

I have a feeling that it would be a lot.

[petem1989]

@maplelaffs The design doesn't use water as fuel, it runs on ordinary petrol or diesel fuels..

What the water does is capture some of the waste heat energy and convert it into useful work instead of dissipating it through the radiator. The water is just a working fluid to make the engine more efficient.

[getoffmyinternet]

Even in a spotlight this guy would have no public speaking skills.

[maplelaffs]

awsome vid bud 6 stroke is genius but if we start using water as fuel it will no longer be cheap or plentiful you can bet on that the beauracrats will make sure of that

[AgentCROCODILE]

Also you will need some antifreeze solution to keep the water from freezing (and thus expanding and damaging the pipes used to transfer it) too. So the engine is rendered useless in winter.

Also they need a "warm up period" in which the pistons are to get warm enough. This means that initially the last two strokes are useless until the piston is hot enough to heat the water to such an amount.

[nem427]

Since the steam expansion stroke wouldn't produce as much power as the expansion of the combustion gasses, the maximum specific power output is reduced. There are other practical problems too. Basically you end up with an engine with low specific power, dirty combustion, cracked piston or cylinder head, worn cylinder liners, massive blow-by past the failed rings, degraded oil etc, etc. There's a reason this idea has lain dormant for 94 years. Funny that autoweek swallowed the 'invention' ...