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Formula413 -

Originally Posted by Formula413

As I understand it the O2 sensors should not come into play when using this device because, in theory, it would supply a perfect 2/1 mix of hydrogen and oxygen into the intake stream, which would enter the exhaust stream as water vapor which would be ignored by the O2s.

Really? I hadn't heard that. Isn't the exhaust stream above 700 degrees? Would the extra 02 have recombined into water vapor at that temperature? :

Understanding oxygen sensors can help techs test, diagnose
http://www.asashop.org/autoinc/dec2002/mech.htm

In construction of the zirconia sensing element, a porous platinum electrode material covers the inner and outer surfaces of the zirconia solid-state electrolyte. The inner surface of the sensing element is exposed to an outside air reference, while hot gases in the exhaust stream surround the sensor's outer portion. Oxygen content of outside air is approximately 21 percent, while exhaust gases have much lower oxygen content - between 1 percent and 3 percent.

Differences in the two oxygen levels, and the electrolytic properties existing between the two platinum electrodes, allow ion transfer to take place and generate a small electrical charge. Oxygen ions are electrically charged particles that flow through the zirconia sensing element when there is a disparity in oxygen levels. The greater the ion flow, the higher the voltage produced. Once the zirconia sensor element reaches an operating temperature of 572 degrees Fahrenheit to 680 degrees Fahrenheit, signal voltage output can range from near zero to 1 volt - depending on the oxygen content of the exhaust gases.

CarloSW2