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My Own Hydrogen-Oxygen Generator

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My Own Hydrogen-Oxygen Generator
 
 
 
        
 
  
My car is an old Mercedes. My dog is eager for traveling in cars.                     The gas generator itself is here. A red filling plug shows where the container
                                                                                                                  of the generator resides. The gas sucking rubber tube is put in a hole under
                                                                                                                   the handle of the container, opposite to the filling plug. Under the handle a
                                                                                                                   rubber cap can be seen that covers the upper ends of the electrodes and holds
                                                                                                                   them in their place. On the left side of the container lie an ammeter and a
                                                                                                                   fuse holder with a fuse. At the back of the red plug and ammeter, you can see
                                                                                                                   the container of the windscreen washer that at first I used for a gas generator.
 
 
A rubber tube leads the generated gases from the gas generator (left, red
plug) to the air intake hole of the engine.
 
 

Making My Own Hydrogen-Oxygen Generator

 
Principle of the Hydrogen-Oxygen Generator in Short

Normally, only hydrogen generators are spoken of, but you have to notice that when it is a matter of making a "hydrogen generator" for an auto, the electrolysis that is used to disintegrate water, generates also oxygen and is not separated from the hydrogen. Why? Because separating the two gases would mean unnecessary complication for the device, and it is useful to burn the oxygen in the cylinders together with the hydrogen. That way, for its part, the oxygen helps the fuel to burn better than by burning only the hydrogen that needs oxygen for its burning anyway. The engine gets practically all of the oxygen it needs by sucking air, but the pure oxygen mixed with hydrogen gives a special boost for burning. In addition, the electrolysing of water generates transformed water (HHO) and water vapor that also help the burning. The phenomenon electrolysis needs an electrolyte to occur, which implies a chemical solution that leads an electric current.

The generated hydrogen takes a double volume when compared with the oxygen, when both are created in an electrolysis of the water. That is because every water molecule (H2O) has two hydrogen atoms (H2) and only one oxygen atom (O). You can notice which electrode generates hydrogen, because much more bubbles are rising from there. That is the negative electrode, which is connected to the "ground" or body in most cars. This electrode collects the positive hydrogen ions of the disintegrated water. The positive electrode collects the negative oxygen ions, and you can notice much less gas bubbles rising from that electrode. Both gases are released into the same small chamber where they mix together and are sucked into the cylinders via a tube.

 
My First Attempt to Make a Hydrogen-Oxygen Generator

My car is an old Mercedes Benz Diesel 200E with automatic gears. Doing my own gas generator for the first time, I had to gain experience. That’s why I did this and that extra as well as make short cuts, that I would not do later. I was doing experiments, therefore I decided to use the plastic water container of the windscreen washer as an electrolyte container for my gas generator. I thought to save my effort and possible expenses when additionally, there was a heating tube spiraling inside the container with heating liquid of the car circulating within it (for freezing conditions). The tube was made of stainless steel and I could use it as one electrode. I connected it to the body of the car.

The other electrode I got from a water heater of an old wash machine that I had disassembled some years earlier. It too was of stainless steel, which is essential because the electrolysis tends to corrupt the electrodes. It had bends also, which was good, because the electrodes need to have a sufficient outer surface. This was intended to work as the positive electrode. I managed to install the electrode beside the first one, fixing it on the hole that I drilled on the upper end of the container. To prevent the electrodes from touching each other, I stuffed a small bundle of plastic fabric between them. The electrolysis had no effect on it.

First I took the electricity from an extra pin on the electric generator of the car, but it was the alternating current (AC) that did not generate hydrogen and oxygen as I noticed later. The fuel consumption did not diminish. Otherwise, it would have been a good solution, because the electricity would have come directly from the generator without the possibility of any other electric devices being involved with harmful results. Of course, I could have bought a rectifier and installed it at the pin to get direct current (DC), but to keep it simple, I decided to find another place for the necessary electric source.

There was a small plastic box under the hood with several cord heads. It was intended to be used in electric trouble shooting. I took my general electric meter and picked up one DC positive cord that had a voltage only when the engine was running and connected it to the positive electrode of the gas generator by an electric cord. It is important that the gas generator does not get current and generate gases except for when the engine is running and sucking the gases. The generated mixture of hydrogen and oxygen can explode if it gets a spark. I severed the electric cord in the middle and installed an ammeter with a fuse of 10 A there. I took the ammeter from an old battery charger that I had disassembled and bought a fuse holder with five fuses. They are necessary also, although the value of the fuse is under consideration. The more current the device consumes, the more gases it generates and the more effective it is. However, there is a practical limit somewhere, or some electric parts of the car will be damaged; even a fire is possible. Don't use too strong of a current nor too high of a value of the fuse!

On the upper end of the container, I drilled a usable hole for a rubber tube that I had gotten from the same old wash machine. One end of the tube was straight and the other end crooked. I put the straight end into the hole of the container together with a rubber ring gasket, and the crooked end I stuffed into the air intake hole of the engine.

I filled the container with soda (sodium carbonate) solution to work as an electrolyte. My gas generator seemed to be completed. I only had to demonstrate how it worked.

 
How My First Hydrogen-Oxygen Generator Worked?

My gas generator worked as I had expected. The consumption mentioned in the specifications of the car in the local driving such as I and my family were doing, was 8.0 liters per 100 km (US milage 29.4), which was the same number that I got at first, when I used AC. I got a new consumption value of 6.4 liters per 100 km (US milage 36.8), measured in the course of about 800 km (500 miles). It meant a fuel saving of 20%. The electric current had been about 5 A in average.

Then something happened that I should have expected. I made a journey with my wife to our summer cottage, and on the return trip, there were a lot of bugs flying, because the weather was warm, so I used the wind screen washer to wipe off the dead bugs. The windscreen became half opaque and I had to stop the car and clean the screen with a wet rag. Luckily there was a bottle full of water in the car. I realized that my idea to double the container of the wind screen washer as a container of the gas generator did not work. That was a loss, because otherwise it would have been a good idea. I had used only about 3.5 E ($5 US) of money for the fuse holder and five fuses. The junk that I used for the purpose, was my own and free.

I disassembled my device and fixed my car for an annual official examination, because it was a usable time to do that. The examiner accepted my car without remarks. He even praised the exhaustion gas because its emission values were especially good. I mused it in my mind but said only, 'good to hear', because I knew that the cause was the gas generator that had cleaned the cylinders. I don't not know what he would have said about my device if he had seen it. The examiners are prone to spoil all joy that the DIY car owners get from their own devices. I escaped that possibility and decided to make another generator that would be without the windscreen problem but could be removed easily for the annual examination.

 
My Second Hydrogen-Oxygen Generator

After the examination, I took a 4 liter (about 1 gallon) plastic juice container and used it as the container of a new gas generator. I cut two strips, 25 mm x 250 mm (1'’x 10'’) of stainless steel from the same disassembled wash machine, fixed electric cords on their upper ends by folding the ends and pressing the bare cord heads inside the folds. Then I heated an old table knife on the flame of my spirit lamp and cut a gap for each electrode on the upper end of he container on the opposite sides of the handle. Then I put the electrodes through the gaps and assembled the other parts as before, except that I used a stronger fuse. The straight end of the sucking tube got its place in a drilled hole under one end of the handle opposite to the filling hole and plug.

I prepared a place for the gas generator by folding one sharp steel panel edge just on the side of the container of the windscreen washer where there was a sufficient room. I cut a usable piece of plywood for the bottom of the room and put the container on it. The container needed no special attachments, because I estimated that it would hold its place under the hood in any circumstances. The new device was completed for a new demonstration, and I had not used a dime of more money.

There was still a problem. On the first journey to our summer cottage with the new gas generator in place, the electrodes moved so that they touched each other, causing an electric shortcut. A fuse burned up, which severed the current to the gas generator, the electric tuning of the cabin heater as well as to the rpm meter. Afterwards, I noticed that the fuse of the gas generator was too strong, stronger than the other fuse, so I took a weaker fuse of 10 A for the device and a stronger one in place of the other one. Also, I secured the electrodes that they could not move anymore and touch each other, although I did not use plastic fabric this time. I only covered the upper ends of the electrodes with a rubber cup, so that they held their places. I expect to get at least equivalent savings of the fuel as in the previous time.

It has to be noticed that the current values of the existing fuses of the car has to be honored, so that they are not carelessly changed to stronger ones. The current must not be so strong that it is able to wreck some electronic devices of the car, maybe even causing a fire. Therefore, the electrodes have to be of a moderate size and kept securely apart from each other, and the electrolyte must not be too strong. The electric current in my new device is about 5 to 6 A but could be a couple of amperes higher without any danger. The soda, as an electrolyte does not corrode the car, so it is a good substance, but the acids and salts do that and have to be rejected.

 
Some More Experience

In addition to my own car, I made a gas generator for the car of my daughter. Its exhaust header had lost its cover and it became very hot when the engine worked, so I decided to install a gas generator upon it. I took an old tin box for the container of the device and installed a positive electrode inside it, so that the head of the electrode came through one end of the box. I insulated it from the tin plate of the box that was the negative electrode connected to the body of the car. Otherwise I did as before. I thought that the remarkable generating of the water vapor in that place together with the hydrogen-oxygen mixture could be very effective to diminish the fuel consumption. However, there was a problem. The fuse burned up again and again, and I don't know yet if it was caused by a short circuit between the positive electrode and the ground or the electronics of the car that someone has tinkered earlier. More work expected!

 
Good luck!

These are my experiences. Many other guys have different ones, but a most important thing is to do all phases carefully. I blundered with the electrodes and fuses of my second device, but because I had taken precautionary measures, no damage happened. Only a fuse burned up. Even in the container with an exploding mixture of hydrogen and oxygen inside its upper end, no explosion occurred, because the electrodes could touch each other only well below the liquid surface. A bundle of unsolvable fabric or glass fiber is a good means to keep the electrodes apart from each other, but it is not necessary if you can secure them otherwise. Doubling the container of the windscreen washer as a container of the gas generator could be a good idea if there were an electrolyte around that could double as a windscreen washing solution without making the screen opaque in any circumstances. I don't know one. Do you?

Good luck for do-it-yourself gas-generators!
 
 
Update 08.19.2009
 
The second hydrogen oxygen generator was a success. On a drive of 834 kilometers (518 miles), the consumption was 6.1 liters/ kilometer (mileage 38.5), which means a saving of 24%. My son made a journey to West Lapland and drove a remarkable part of it on small dirt roads using low gears. Additionally in some phase, the electrolyte had heated too much while driving slowly under hot sunshine. The current had exceeded 10 A and the 10 A fuse had burned up. The average consumption would have been even lower without that incident.
 
The small incident shows one point more to be considered. The hotter the electrolyte, the higher the electric current is. Therefore, it must be noticed that when the engine and electrolyte are cold in the beginning, the current has to be adjusted at half or less what the ampere value of the fuse is. When the engine heats up and heats the electrolyte also, the current eventually rises to its maximum value that has to be lower than the value of the fuse. Sure, I had paid attention to this fact and adjusted the current to 5 A when the electrolyte was still cold, but the engine and electrolyte had heated more than I had expected under hot circumstances. The fuse burned up but nevertheless, it is not wise to use an excessively strong fuse. I replaced the burned up fuse by another with the same value of 10 A.
 
 
 


 

Comments

Kauko Loukas - Dec 24, 2009 3:59 AM

Updated.