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The scientific term HHO stands for oxyhydrogen, a mixture of hydrogen and oxygen with a concentration ratio of two hydrogen parts and one oxygen part. Oxyhydrogen is also used in welding torches but has other uses in vehicle engines. Car systems have oxyhydrogen gas generators with an electric current to produce this gas using HHO water and a catalyst (known as an electrolyte solution).
Oxyhydrogen is burned with the engine’s primary fuel (gasoline or diesel) and helps the primary fuel burn more completely, providing more energy for the same amount of fuel being used by the engine. This extra (received) power is necessary for the engine to operate optimally compared to the load, so the engine’s primary fuel can be underpowered, while the engine delivers the same torque for that particular load.
When oxyhydrogen (also known as hydroxy gas) burns it reverts to its original formation before electrolysis occurs, meaning it becomes steam vapours, which are fine droplets of water.
Different types of HHO in car system
There are mainly two types of HHO in car systems, which include wet HHO cell and dry HHO cell configurations. Both of these systems produce hydroxy gas as a result, but differ in their technical design. Originally the experimental electrolysis process to produce hydrogen in laboratories took place under the wet HHO cell design. The wet cell configuration is still basically the same.
When experimenters began using this configuration as a fuel-saving device, word soon spread and many DIY technologists began trying to improve the design by using different materials, configuration layouts, and different catalysts. Gave. Wet cell design has improved a lot over the years and has also become more reliable. Through continuous research and development, some enthusiastic designers came up with a new idea to reduce the maintenance time associated with wet cell design. Fortunately the latest design also became more compact, which was a huge advantage with the tighter modern engine bays. This became known as the dry HHO cell design.
wet HHO cell vs dry HHO cell
We have tested many different designs currently on the market and have also created an HHO product review page for these DIY HHO tech guides. We found out that in general both the designs have their advantages and disadvantages.
Wet Cell Design Advantages,
- Easy to clean periodically as a preventive maintenance procedure
- Easier and faster to replace corroded anode plates
- Does not contain multiple seals that will eventually corrode or harden
- Cheaper to manufacture than most dry cell designs
- No additional external pump is required for electrolyte
Disadvantages of Wet Cell Design,
- Heavy in design which can be a problem to install on a modern engine bay
- Frequent corrosion of anode due to oxidation leading to greater cleaning
- Anode plates will need to be replaced more frequently due to excessive corrosion
- Wet cell design generates more heat in the electrolyte solution
- Requires more current than dry HHO cell design
- Electrolyte design requires more frequent flushing with fresh clean electrolyte
Advantages of dry cell design,
- Very compact in nature both in width and thickness
- Requires low current for continuous operation
- Heat build-up is almost non-existent in the HHO generator
- Electrolyte stays clean for longer
- Anode plates corrode very little
- Terminals do not corrode as they are isolated from the electrolyte
- Usually requires less periodic maintenance
Disadvantages of dry cell design,
- It’s more expensive to design or build one as a DIY project.
- More precision is needed to make the design
- Each cell is separated by a seal that will eventually harden and leak
- Preventive maintenance procedures require disassembling the entire HHO generator
- An external pump is required for the electrolyte on most designs
As you have seen from above both wet and dry HHO have their own advantages and disadvantages in car design. Before attempting this type of installation, a major factor to consider is the amount of space available in your engine bay. Most modern vehicles which seem to have very little space available will need a dry cell design mainly for two reasons which are less space required and less maintenance frequency. This allows installation in even the tightest and most difficult areas to reach, if that is the only option available to you. A common option is to install a dry cell HHO generator in the wheel well area, in front of the radiator, just behind the bumper or behind the front fenders, covered by a plastic fender liner from the factory.
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