This is a typical dry cell setup with Pulse Width Modulator (PWM). What you see in the above diagram is a HHO dry cell connected to electrolyte tank which has electrolyte filled just past half way and re-circulates through the HHO cell from the tank as shown by the red and green arrows. The top half of the electrolyte tank is where the HHO (hydroxy) Gas will accumulate before it moves to the bubbler tank.
The purpose of the bubbler tank is 2 fold -
(1) It filters the HHO gas coming from the top of the electrolyte tank to the bottom of the bubbler tank and through the water in the bubbler tank (bubbler tank filled with water - no more than half way). This stops harmful steam carrying electrolyte from making its way to your engine as the water traps it in the bubbler tank. This protects your engine.
(2) It stops a possible backfire from your engine igniting the HHO gas while it's still in the hose that takes it to your engine. It would then continue to the electrolyte tank but... FIRE CANNOT PASS THROUGH THE WATER IN THE BUBBLER. Although in all our installations we have never experienced a flash back from an engine back fire ourselves we know that it is possible. We simulate them when testing by purposely igniting the gas coming out of the bubbler.
The explosion even with such a small amount of HHO gas (less than Half a liter) is just unbelievable.
Although many people sell flash arrestors and other safety devices all of which we tested so far have failed with the exceptions of a SPRING LOADED PISTON VALVE placed at the top of the bubbler or a BLOW OF MEMBRANE placed into a hole drilled into the cap of the bubbler.
It is the simplest safety device, yet the most effective. 100% guaranteed to work.
The electrical setup is very basic. Our PWM is used to transfer positive power to your HHO cell from your battery. The PWM must have a source to trigger this, the best source is to find the wire inside your fuse box responsible for the check engine light in your dashboard display. The source of the check engine light only gives power when the engine has already started.
You don't want electrolysis to start if the engine hasn't started first. When production of HHO gas begins, after the engine has started, all the HHO gas produced will be consumed immediately keeping your unit safe. This is called a HHO on demand system which means no Hydroxy gas is stored and all Hydroxy gas produced is consumed immediatelly.
You should consider a good PWM (pulse width modulator) that's been DESIGNED FOR HHO USE. Not something designed for controlling electric motors or lighting as most are.
The PWM must be specifically designed to have feedback from the HHO cell so it can control the rapid fluctuating currents involved with an installed electrolysis apparatus in a car.