Steam injection test on Saab 900 Internal combustion engine, not HHO or water car but Hypermiling

Steam injected into the manifold increases engine vacuum and torque, RPMs rise faster and the engine is de coked and cleaned internally, also the exhaust gas vanishes? I am unable to explain why this happens, there are thousands of patents for steam injection systems yet I have never seen one on a car, why not? my fuel logs show a 14% increase in efficiency so far.

Any comments and suggestion are welcome to try and explain this phenomena.

Category:

Autos & Vehicles

Tags:

• Dry Steam
• Superheated Steam
• Water vapour.

[tuvoca]

Face it, gerhube2000 -- you got pwned.

[kremene]

I see here only idiots.Steam is hot water and from Chemistry point of view is a mix of Hydrogen and oxygen.hydrogen is the most energetic element in UNIVERSE.When is combustion in oxygen results 143 Kj for every gram of Hydrogen.Gasoline offer only 44 Kj of energy.So Steam INCREASE POWER OF ENGINE AND HELPS TO IMPROVE BURNING OF GASOLINE.Thats why never smoke when steam is injected in manifold.chek on Google Patents Yuri Yatsenko US PAtent Application 021507 from 2007(September 20)

[nlo114]

Why bother with the steam generator?

The inlet manifold vacuum will lower the temperature and condense the steam into water.

Would it not improve the efficiency by just injecting water?

[volks1234]

your tricking your engine to run lean

the oxygen sensor works by temperature so the steam lowers temps computer adjust by running lean

[givebenadollar]

The increase in vacuum you see is due to the cooling effect of the steam. The steam you are providing the engine is low quality (high water content) and the water then boils off in the engine removing heat. This causes the internal temperature to go down and increases vacuum. The steam also plays a part in combustion, and preheating fuel/air. This does not change AFRs (with the exception of the more efficient burn possible with the water.)

[marek0086]

@Ollitopay~ no u got it wrong! Whats water made up of??..... Hydrogen and Oxygen!!!

Which means the air:fuel ratio will be leaner!

He should hook up a wideband O2 sensor and check the afr's under load.

[Emporator]

@marek0086 Doesn't everybody start off as an amateur? Oh, you mis-spelt amateur.

[wizardman42]

not sure about the vacuum issue , but when splitting molecules any kid of stess helps break them down , steam injection is like electrolysis on the fly , first heat turns the water in to saturated steam , under 400F, some of the mol. give up its basic components , then the compression stroke break some more, then BANG electricity !!!!then more fire , heat and pressure , well DANG!!!! a lot of the molecules break apart to basic gas's I had a Nissan 1.9 liter up to 80 MPG and was not using a pump

[kenterprise1]

steam cool down the air/ mixture during compression, reducing pumping looses and then over-expand on power stroke and further cool the gases during exhaust stroke. That's why you get higher vacuum on idle and less "smoke" - vapors in fact - on exhaust. Engine load based variable volume improve the combustion preventing spark plugs wetting. Comparing to large water droplets injection the steam is already "energetically charged" so for less added energy still have expansion potential ..

[Pinhead650]

I don't know why the exhaust condensation disappears with the steam.

The increased power and mileage, however, is due to the fact that steam expands at a much higher rate than nitrogen. This increase in expansion creates higher cylinder pressures which increases the amount of work done on the piston.

[Ollitopay]

The car thinks it is getting air but it is actually getting air and steam. The steam takes a great portion of air out of the air to fuel ratio equation and replaces it with water. Water doesn't burn. Less air = richer air fuel ratio = more power and efficiency. But it is bad for the emissions system. The engine is cleaned because water is an excellent solvent, especially when it is hot.

[kremene]

@Crazylalalalala I never said that is a splitting.Steam is just water but with another state of energy(much higher).Indeed is not burning with a regular flame but if you try with high voltage plasma definietly will BURN.Inside combustion chamber are very high temperatures and presuures and so steam IS BURNING(in fact first molecule is splitting then hydrogen burning)