Quote:
Originally Posted by sarguy01
Why do I need it at all then? ...if the engine is still burning gasoline, then the O2 sensor will still function properly, with no need to "trick" it?
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When the exhaust oxygen content goes up, the voltage from the O2 sensor goes down. The CPU assumes you have a lean mixture and increases fuel from the injectors to compensate. This is the normal closed loop process.
Yes, the oxygen sensor will function properly regardless... That's not the reason EFIEs are needed.
When you actually increase combustion efficiency, there will be more oxygen in the exhaust, because oxygen is not being tied up as CO and as NOx. With efficient combustion, you also don't need as much fuel to maintain the same power output, so if you reduce the actual fuel rate, you get 'more' oxygen in the exhaust from that too.
This is what we saw when we were applying Carburetor Enhancer, HyCO 2A and HyZor systems to carbureted vehicles. The CO2 would rise slightly, the HC would drop to near nothing, the CO2 and NOx would also drop dramatically. The exhaust oxygen would typically rise by 2%, sometimes getting as high as 16%.
The pollutants were so low that hamsters, which would go unconscious in 2 minutes breathing regular exhaust, would not go unconscious in a vehicle that was idling from HyCO 2A vapors, even after 15 minutes.
The CPU doesn't 'understand' more efficient combustion... It's programming assumes certain conditions that do not include the more efficient combustion, so when it 'sees' more oxygen in the exhaust, it adds fuel that results in a mileage LOSS when combustion enhancement technology is applied to EFI in closed loop.
The EFIE 'compensates' (adjusts the voltage signal) for the increased oxygen content in the exhaust so that the CPU doesn't 'see' the extra oxygen and doesn't increase injector fuel.
So the only time you need an EFIE is when you apply combustion enhancement technology.