Doping an internal combustion engine with water vapor

[Carnival DK]

Good evening,

I see this pump to feed (by pulsation not continuously) the GVI in small quantities with the sprayer head.

[Flytox]

Also possible .... you wouldn't give us the little diagram that goes with it?

[Carnival DK]

I would like to make you a little diagram but I suck see super suck in computer science and electronics my domain is boilermaking.

[Flytox]

New configuration with a membrane compressor to spray water at the entrance to the GVI and first burn-in run.



The test was carried out with a "nozzle" with a diameter of 8 mm for the arrival of exhaust gases in the GVI. The temperature rose to more than 350 ° on a big acceleration. At this stage we almost arrive in the field of EGR



At this temperature it does not work at all! The GVI inlet pressure moves very little (behind a jet) and did not want to exceed 1.03 bar in all circumstances (not exceeded 110 km / h).

When I partially close the flap in the intake manifold to increase the depression at the reactor outlet (0.95 bar) the pressure at the GVI inlet follows slowly (0.99 bar).

The 8 mm diameter "nozzle" passage can easily be replaced by a 4 mm or smaller nozzle. The GVI input temperature will certainly become more reasonable again.

[Flytox]

Spraying with the car's water circuit under 'normal' conditions, but with cold water (engine stopped). With water between 60 and 70 °, it will certainly be even finer:







Difficult to take a representative photo

The reactor before isolation:



The insulation is more to protect the surrounding plastic pipes and the starter than to gain a few degrees.

[Other]

Hello
spraying with exhaust gas gives a nice mist (better than with air) and the advantage of starting at low speed.
In my case, the spray hole is 1/8 or 3,2mm, I kept the same principle with air, adding ambient air and much more generous, the hole is 3/4 pipe.
the temperature at the inlet is low, even less than the ambient air
the outlet temperature depends on the volume of air circulating in the dry reactor, much more than on the quantity of water injected.
I am not sure that having temperatures this high at the entrance is efficient.
Although to see some assemblies on the net, it generously heats the entry of the reactor the exchanger is almost as big as the reactor itself.
After a few tries you will be fixed on the front heater.
I always have better results in spring and autumn than in summer in the hot weather if it is not due to the temperature of the air entering the reactor? the reactor outputs are higher at the cooler temperature 20c ..

Andre

Even when driving in town at 60kmh, the outlet temperature remains around 120 c, despite the drop in exhaust temperature

Photo of June 20

[Flytox]

Hello André

at the inlet temperature is low, even less than the ambient air
the outlet temperature depends on the volume of air circulating in the dry reactor, much more than on the quantity of water injected.

Speaking of air flow, are you still working in depression with a venturi in the intake manifold to suck in the steam?

I am not sure that having temperatures this high at the entrance is efficient.
Although to see some assemblies on the net, it generously heats the entry of the reactor the exchanger is almost as big as the reactor itself.

Indeed I cannot say whether it is good or not to heat the additional air. In any case, this makes it possible to increase the quantity of water that can be injected into the reactor without drowning ....

I always have better results in spring and autumn than in summer in the hot weather if it is not due to the temperature of the air entering the reactor? the reactor outputs are higher at the cooler temperature 20c ..

For all the assemblies that I could do, the results were better with the highest temperatures. I still have a doubt that there is not a bias in the instrumentation that would drift with the temperature ... The worst results are winter in the rain ...

[Other]

Hello

Speaking of air flow, are you still working in depression with a venturi in the intake manifold to suck in the steam?

Yes, the depression is around 80cm of water at 2500rpm, but when I enter I blow a jet of air with the turbo in a small venturium which draws air into the reactor.

The worst results are winter in the rain ...

It's the same for me as soon as the temperature drops below 10c and the freezing point the results are bad, even when heating the air intake of the reactor and the engine, on rainy days also less good ..
Didn't notice if running lighting and ventilation for heating at night, if it's simply producing more energy for props? or in the hot weather roll roof and open window?

[Flytox]

Yes, the depression is around 80cm of water at 2500rpm, but when I enter I blow a jet of air with the turbo in a small venturium which draws air into the reactor.

Can you give us a diagram?

Test of the day with a 3 mm nozzle to limit the flow of exhaust gas into the inlet of the GVI. Apparently it works. On the other hand there are sudden rises in temperature at the GVI entrance ... a little strange (light blue curve)

Apologies for the torticoli, but converting to Econo format makes the image unreadable in horizontal position



When the water flow is below a certain threshold, the GVI inlet temperature starts to follow the exhaust temperature. When the water flow exceeds approximately 0.6 liters / hour, everything seems to stabilize (except during the strongest accelerations). The steam outlet temperature follows more loosely the variations in the inlet temperature of the GVI.

It would therefore seem that the water flow rate can be one of the influencing parameters of the stability of the GVI / Reactor assembly with this threshold phenomenon.

It will be necessary to study an nth exchanger with the LDR to stabilize the temperature of the exhaust gases admitted into the GVI ... In fact, this is what is done on certain recent EGR valves.

[Flytox]

There is a strange point in my readings, an instantaneous consumption of 3.56 liters / hour at 122 km / h (very good!), But at the same time the vapor temperature is breaking down at 70 °.

Can someone confirm if we can drink well at this steam outlet temperature?