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How to Make HHO Fuel Cell Circuit in Automobiles for better Fuel Efficiency

How to Make HHO Fuel Cell Circuit in Automobiles for better Fuel Efficiency

In this post we'll try to investigate the making of HHO gas in automobiles for enhancing their mileage by approximately 50% or more, that means a reduction of petrol or diesel consumption by the same amount.

In the previous post I tried to put forth an innovative design of a high voltage low current generator which could be used for splitting water into HHO gas (by decomposing the H2O bond into two parts of hydrogen and one part of oxygen).

Using a high voltage for the electrolysis allows the breaking apart of the water molecules by brute force without the need of a higher magnitudes of current (amps), which in turn makes the procedure extremely efficient.

We can understand the above logic by analyzing the following example:

Higher Voltage is more Effective

Suppose we have a 12V battery capable of delivering a maximum current of 7.5 amps, if we use this battery power for the electrolysis we would probably be implementing it very inefficiently and the power required for the electrolysis would easily exceed by far than the power of the accumulated HHO gas in terms of  megajoules.

However if the same 12V/7AH is boosted to say around 20,000 voltage with a current as low as 5mA would be able to yield better results (many people might not agree with this).

Moreover since this high voltage is pulsed using a PWM circuit, the sharp rise and fall of the pulses adds up to the efficiency level of the process.

Many critics argue and don't substantiate the use of a high voltage for yielding higher efficiency, however the following few examples provide us sufficient logical evidence regarding why a high voltage could be more effective than using high current for the electrolysis of water.

Passing a low voltage, high current potential through a very high resistance could be useless because the current would be restricted by the high resistance and produce little effect on the process. Since pure water can be notorious with its resistance value (pure water may have a resistance as high as 200k or even more), a high current at low voltage would be quite ineffective.

On the contrary a higher voltage would be strong enough to tear apart the water high resistance and be  comparatively more effective, even though a lot lesser number of electrons would be passing through, but nevertheless we would see electrons crossing over with better efficiency.

Assessing with Practical Examples

Just try applying a 12V/100amp through a 200k resistor and check the current with an ammeter, according to Ohms law it would be around I = 12/200000 = 0.00006amps or 0.06 mA, in contrast if a 20,000 volt is used we would find it to be capable of delivering I = 20000/200000 = 0.1 amps or 100mA, that looks much impressive, although we wouldn't want 100mA to be used for electrolysis in order to avoid explosions or atomization of water, we can expect about 10mA to be quite sufficient for the process.

Another example that looks quite relevant to the subject is our body itself, we experience a lethal shock when we come across a high voltage AC with any part of our body, but in contrast if we touch a lower potential input such as a 12V AC we might not feel anything regardless of how high the source may be rated with amperage.

The above example provides an authoritative proof regarding the power of high voltage in terms of  its riping ability through high resistance passages, the same may be true with lightning thunder bolts which are equipped with millions of volts and that's why are able to knock out the huge atmospheric barrier and reach the earth surface.

Having said this, in the proposed use of HHO gas in automobiles one must be careful regarding not supplying the high voltage with high current, otherwise that might lead to an explosion inside the water and result in atomization of water molecules which is definitely not an electrolysis.

Installing HHO Fuel Cell in Automobiles for Enhancing its fuel Efficiency

Here we'll talk about using the HHO fuel cell idea in a motorbike and learn the procedure of installing and integrating it with a motorcycle engine.

In our earlier post we discussed how HHO gas could be produced using a high voltage CDI coil circuit, we will use the same design for the proposed implementation and for enhancing a motorcycle's fuel efficiency.

Since your motor cycle would be already having a CDI ignition system this could make things much easier for us, since we could simply borrow it's function for the discussed purpose.

However we must be careful about a couple of things: the sharing of the high voltage pulse from the existing CDI should not hamper the actual ignition of the bike for which the CDI coil is originally installed.

Secondly, we don't want the vehicle's alternator to work extra hard for compensating the sharing of the CDI sparks with our HHO fuel cell.

Using Spark Suppressor

The above situations can be countered by employing a spark arrestor resistor or a spark suppressor device. This device is normally used in series with the high tension input from the CDI before it enters the spark plug.

As the name suggests the spark suppressor is used for suppressing excessive voltage from reaching the spark plug thus helping to cancel out the generation of unnecessary RF disturbance and noise.

This means that in normal conditions the spark plug would be wasting a good amount of energy by shorting the high voltage across it's spark gap which apparently looks pretty small compared to the enormous voltage it's been fed.

The use of a suppressor ensures that the excess voltage which would otherwise become wasted in the spark plug now gets restricted and is converted to heat, which is again a wasted energy unless it's diverted for some useful purpose.

The utilization of a spark suppressor resistor and by diverting the excess energy from the CDI coil to the HHO cell appears to be a smart move.

Circuit Diagram

An easy to understand set up for generating "on demand HHO gas" can be witnessed in the above diagram.

The electrodes are made out of  good quality stainless steel pates which are appropriately arranged in a mesh like formation through a face to face intersection but without touching each other.

Using Baking Soda to Increase Efficiency

A little baking soda is added in the water for speeding up the electrolysis process and assisting the electrons to flow with greater efficiency.

In the left container we can see an air vent pipe, this is introduced to allow air to pass inside the vessel as the water is electrolyzed into HHO gas. This air vent pipe prevents vacuum formation in the vessel while the electrolysis is in process.

Since the input high voltage is derived from the motorcycle's CDI coil or the spark plug, we can assume it to be in sync with the engines RPM and in accordance with the speed of the vehicle. Therefore the chance of inducing a disproportionate amount of HHO inside the combustion chamber is automatically controlled, making the procedures much safer and healthier for the vehicle's engine.

The HHO gas output from the bubbler chamber is directly integrated with the air intake passage of the motorcycle's combustion chamber.

Once the above set up is installed and initiated, an immediate improvement in the performance of the motorcycle's engine could be expected and a drastic reduction in the consumption of the primary fuel could be witnessed.



About the Author

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials. If you have any circuit related query, you may interact through comments, I'll be most happy to help!

48 thoughts on “How to Make HHO Fuel Cell Circuit in Automobiles for better Fuel Efficiency”

  1. Hi Swagatam,
    It would appear you are trying to promote a perpetual motion machine. Your idea cannot possibly work, more energy will ALWAYS be required to split water into oxygen and hydrogen gas than you will generate by burning the hydrogen. And the combustion process will only be at best about 30% efficient. So the energy required to produce the hydrogen gas will be three times the combustion energy even if the electrolysis process was 100% efficient (which it won’t be). I suggest you familiarize yourself with the laws of thermodynamics before suggesting schemes like this which can NEVER work.

    • Hi Vic, may be you did not understand the concept fully. The electrolysis process uses the wasted energy from the spark plug. The energy supplied by the ignition coil to the spark plug is unnecessarily high. Since the spark gap is just a few mm apart, it can be arced with much lower amount energy, while the remaining energy can be bifurcated to the HHO cell for the HHO production.

      I hope you got it now!

  2. It is a very interesting idea from which it is only a step towards the water car. In the 70’s of the last century, this was even said to be that electrolytically decomposed water into an oxygen-hydrogen mixture is fed to the engine where it is burned, and of course water is generated as waste. There was no longer enough to bring this water back to the generator, where it would be re-decomposed into the oxygen-hydrogen mixture and the perpetuum cell phone is in the world.
    It is true that this device is described here a little differently. It’s just like an additional combustion. Here’s just a question of how much power I use to distribute that water and how much power my engine will increase. If I forget all this, there are still a few technical problems.
    First, try to discuss this water decomposition with an experienced chemist, who will surely explain that the oxygen-hydrogen mixture you create is extremely dangerous from the explosive point of view, otherwise they say that this mixture “barks” when burning.
    Second: The voltage and current decomposition data for water decomposition are at least improperly formulated. Depending on the size of the electrodes and the distance from each other, if you operate the water at a voltage of about 12v, but if there is distilled water of about 10µs, you will achieve a current of several meters or just µ ampere, according to the electrode sizes and distances mentioned above . you can accelerate this process by adding liquor to distilled water, which will increase conductivity rapidly, but only water will decompose in the decomposition process, the lye will remain there. Therefore, it is sufficient to add distilled water and the process will continue.
    This was the essence of the “oxygen-hydrogen” welder published in “Do It Yourself” in my youth until there was a few explosions of these devices. Fortunately, those developers were designed so that the amount of mixture produced was quite small, so the explosion was rather just a “freak” and did not cause destruction. I personally experienced such a bang with my developer.
    So that my view is, put your hands away from such devices. Not to mention how badly it affects the engine in the combustion chamber, where the oil burns at elevated combustion temperatures, and only after a few 10000 when you find that the engine is “running out” due to imperfect lubrication.

  3. You said, “…we wouldn’t want 100mA to be used for electrolysis in order to avoid explosions or atomization of water…” (This is at 20kv.)

    From what you have said there must be a cross-over point of voltage vs current where it becomes dangerous. Is there a known formula, or electrolysis law that predicts where the danger level occurs? Thanks!

    • I have not yet investigated about the formula, however the easiest way is to start with the lowest possible current, may be at around 10mA, and then check the response by gradually increasing it until the most favorable combination is achieved.

  4. Hi, Thanks for your good post. I have a question.
    Q1: If I connect my hho cell with spark cable and body(-), will it effect my motorcycle CDI device?

    Q2: What is the good sell design for this system? (+-+-+-+-) or (+nnn-nnn+).

    coz heat is the main problem for hho cell. (+-+-+-+-) is more production but cell take too amp and heat. (+nnn-nnn+) is less production and low amp draw. I hv no idea about high voltage for production and heat. Thanks.

    • Hi, Glad you liked the concept.

      yes it might affect the ignition process of the engine, therefore it is advisable to use a suppressor resistor for both the units, one for the HHO cell and the other for the spark plug separately.

      sorry I do not have idea idea regarding the electrode configuration, you may have to investigate through some practical experimentation

  5. swag,
    Thank you for your response. I looked at other schematic you advised. I don’t fully understand it. What is requirement of step up transformer in your hho circuit? Should it be pulsed at 50hz? Can the tip122 transistor be operated at this frequency?
    Looking forward to hearing from you.

    • Hi Perry, the ignition coil primary is designed to work with 100V minimum and upto 300V, therefore it becomes necessary to step up the 12V DC to above 100V for operating the ignition coil optimally.

      The frequency is not crucial but 50 Hz looks quite fine, and can be used

      Why would the TIP122 have problems with 50Hz? sorry I could not understand this justification, kindly clarify.

  6. Swag,
    I built your hho high voltage schematic. I have noted some deficiencies in it. The pwm circuit only supplies 8hz at low end and 9hz at high end. Duty cycle is greater than 50%. My transformer operates best at 50hz. I think this a problem to getting unit to work. Do you have a modification of the pwm circuit?
    I would appreciate any help.

  7. swagatam,
    I will build your hho generator using cdi ignition coil. On your schematic, you call for a 105/250 capacitor. Is this a ufd or mfd size? Can a electrolytic cap be used? What do you recommend?

  8. thank you for your reply. Base in the picture above there is a red wire connected to the positive wire of the ignition coil and theres is also a spark suppressor, the question is, where should I exacly connect the red wire, is it before the spark suppressor or after?

    thank you

    • you are welcome!

      connect it before the suppressor, that is towards the high tension cable.However I think the real problem could arise due to difference between the resistances of the air gap of the spark plug tip, and the water resistance.

      spark plug's air gap may have a resistance of over 5 meg (2mm apart), while water only around 200k.

      to create a balance between the two you might have to add a resistor with the HHO cell wire, or increase the distance between the electrodes to an extent where the sparking in the spark plug does not get affected, you may have to find this balance with some trial and error on your workbench table.

  9. Hi sir,

    Thank you for the quick reply.Actually I'm just using 2 wires for positive and negative and each end is submerged in the water, the two ends are far enough about 1.5-2 inches.
    How do I add suppressor resistor, can you show me a diagram?

    Is it right if I directly connect the positive wire to the tip of spark plug? this is what i did.

    thank you

    • Jake, from where are these two wires coming? it is supposed to be from the high tension wire of the ignition coil and the ground.

      you can try increasing the distance of the electrodes inside water to increase the water resistance…and remember do not use any form of chemical in the water, the water must be pure tap water, without any external agents.

      for a suppressor resistor, you can go to any motorbike spare part shop and tell them to give you a spark plug noise suppressor resistor, it will be a small cylindrical shaped black carbon rod, about an inch long and 3mm in diameter, connect this in series with the HHO cell wire.

  10. hi sir,
    i tried this method sir, actually it looks very simple but when it try it with my motorcycle it's not starting, it seems that the currents are all diverted to to hho cell. I tried to remove the ground of the hho cell then when the engine started I manually connect the wire to the body of the vehicle then engine stopped.did I do something wrong
    .please help me
    .thank you..

    • Hi Jake,

      That should not happen, I think you must first check the HHO apparatus on table by connecting the supply from your bike's ignition col, and if possible remove the spark plug from the bike engine and check the response of the spark while the HHO is also connected. This will allow you to find the fault in the design.

      If you find the spark getting affected you can reduce the diversion by adding a suppressor resistor in series with the HHO cell.

      I have manufactured ignition coils and CDI systems, therefore I am sure that The current from the ignition coils strong enough to power both the devices comfortably.

  11. good morning sir,
    can i directly use the current from the spark plug or i need any circuitry before connecting it to spark plug…

    • yes you can extract some energy from the spark plug high tension cable into your HHO generator….but you will have to first experiment with it to ensure that the voltage does not cause explosions or any abnormal reaction inside the HHO container, if it does then you can reduce the current by adding a wire-woulnd resistor in series with the source.

  12. hi sir,
    i have completed making up with the hho dry cell.
    After connecting it to the bike battery it draws a lot of current at the end i get the results of producing HHO..
    but the battery is draining quit fast..
    i saw many plans about pwm but getting confused…
    i liked your plan about CDI.
    Please help me in making my hho cell more efficient by drawing less current..
    so that there is no load on battery.

    • Hi Akshay, the consumption by the HHO generator will depnd on the cross sectional area of the plates which are inserted into the liquid. …but still this can not be so large to discharge the battery quickly….you can check if there is any short circuit inside the container

  13. Water is one of the most unknown materials we have in the Universe and newest research and industrial applications shows that water has a MEMORY and many other new effects if treated with RF frequencies where water can creep from one container to the other bilding a bride ( see the You Tube documentary). I read also all about Stanley Meyers invention and in my opinion, each material can have a resonance frequency. Widely used today is for example the Ultrasound SONIFICATION in many industrial processes (see Ultrasound cavitation in the Biodiesel process). It might even be possible to split up HHO with Ultrasound alone! I heard that Honda has a Motorcycle Prototype that runs on water only but it seems they locked the project in (if not, the whole world would drive with water now). I would test the HHO generator on a two cycle Motorcycle motor connecting the HHO outlet in the hose before the oscillating Valve unit. One could use a parallel CDI Unit only for the HHO generation- not "stealing" the pulses from the Spark plug. I have a Yamaha AG 100 and a Chinese 4 cycle 150 ccm Cross machine and might give it a try. In the AG 100 there is a steel cable bowden which regulates the two stroke oil supply to the Motor. This one might be used to drive a potentiometer which could vary the HHO production according to the Motor speed. But one could also use the voltage from the Spark plug coil exiter coming out from the generator plate of the Motor.Very good article from SWAGATAM- I like this site!

    • Thank you Rainer for sharing your valuable suggestions, I am sure the readers will be inspired and enlightened by it, and I am glad you liked my website…please do keep visiting.

  14. Hello Swagatam,

    Thank you very much for sharing your interesting design.

    I would want to convert a 91 GSX-R 750 to your system. Should I connect the HHO generator to only one of the spark plugs?

    The bike has 2 ignition coils and the setup should be like this:

    I would want to use a 7 plate design like this:
    My plates would be 100 x 130 x 1 mm each.

    Would one cell be enough or would you recommend 2 (1 per coil)?

    How would I secure proper fitting of the cables to the spark plugs?

    I plan to add a simple bubbler and rely on the metal net of the air filter (k&n) as a flame arrestor by leading the HHO to the outside of it.

    I am aiming at at least 30% improvement on mileage – but more would be nice of course :o)

    Any input from you would be very much appreciated.

    Kind regards

    • Thank you Thorsten,

      According to me therer's nothing too critical about the parameters which you have stated, you can go ahead with the mentioned plans and it should work.

      power from a single spark plug would be enough for getting good results.

      The input could be secured to the spark plug neck where the high tension cable from the CDI is clamped

      however a practical test will only be able to confirm the actual results, which can further tweaked for improving the overall efficiency of the system.

    • the CdI is already installed in the vehicle therefore it's referred for the use of its excess voltage for the HHO generation, I am not sure how you would be fitting the xenon ballast in the vehicle, may be it would also serve the purpose

  15. Hello sir,I have installed a hho cell in my scooter bajaj chetak and it works …but the only problem is h2 is producing at very high rate .I want to control the production of h2 .is there any mechanism to control the production with throttle.

    • Hello Kiran,

      the HHO gas is supposed to be integrated with the petrol pipe feeding the ignition chamber, so that it is allowed to enter the chamber only at the right time and when required, therefore I think it is already controlled by this intake pipe valve mechanism.

      you can consult a qualified automobile technician for more info regarding this.

    • HI kiran kumar ! Could you please send a video on youtube , realy interested because I thought that it doesn't work. So happy that someone tried it and it works, I have read all Stanley Meyer's patents and effectively, he uses very high voltage on all his setup, running about 20k volts up to even 80l volts

    • High production is good. Every body want it. stop ur oil inject. than test again. it should run without oil. plz calculate ur hho production (LPM). and share your hho cell design. it could be help us.

  16. Wouldn't the left side air vent need a check valve? Otherwise your O2 (hopefully O2 and not just mono oxygen) and H could exit via the vent and be lost rather than exit through the right-side bubbler.

  17. Sir i tried this experiment in my bike but it didn't work. While i connect the wires as mentioned in image even bike not starts. If i remove the black wire bike starts but spark coming inside the jar. Can u tell me what would be the problem. And one more doubt what happen if i connect it directly to the battery.

    • Naresh, you will need to check and verify the stages separately and then simulate the whole process on a work bench, and then install it in your bike….you'll need an expert automobile engine mechanic's assistance while carrying on the procedures…who should be thoroughly aware how motorcycle ignition works…you'll need to confirm each and every point with meter and troubleshoot if something's not working at a given point.

      if you connect it to battery then also it would work but the outcome will not be free…here we are trying to utilize the excess spark energy which is wasted across the spark plug…and thus we are trying to achieve a Free HHO gas for enhancing the ignition.

  18. Hi sir

    I have tried it but i didn't test it in my bike. HHO is generating in the experiment but as soon as the water color is changing like brownish. Is there any problem with the construction? And one more doubt how long the liquid work in a single fill. Eg. 100km or 200km? . Am using a 150 ml airlock plastic jar.

    • Hi Naresh,

      If the current or the PWM is high then more quantity of HHO will be generated at a rapid rate, which will cause the water to turn murky quickly….so you can try reducing the PWM or the current from the input to prevent the water from getting brownish.

      I am not sure for how long a given quantity of water may last, however again it might depend upon the rate of the HHO release

  19. Mr. Swagatam,
    I am interested to experiment with this HHO Fuel cell.
    As a starter, can you give me a simple hint for the measurement od the S/S plates to be made facing each other face-to-face, just enough for experimenting? I understand the hazard involved, it is may call for the safety.
    Thanks for this information..

    • Mr. Unknown,

      it could be a matter of some experimentation, however approximately 10mm distance between the mesh plates would be just OK

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