EFIE HHO O2 Sensor
MAP MAF
EFIE - What is it and Why You
May Need an EFIE
First some terms you you
may or may not know - so we are one the same
page.
EFIE -
stands for Electrionic Fuel Injection
Enhancer. HHO - or Brown's Gas
- Is the gas produced when you use an electrolyser to
convert water into hydrogen gas your vehicle can use as
fuel. 
O2 Sensor - or oxygen
sensor - is a device used in fuel injected vehicles to
sense and maintain the correct air/fuel ratio. Most fuel
injected vehicles have one or more oxygen sensors installed
in the exhaust stream. MAP sensor
is the manifold
absolute pressure sensor. According to
Wikipedia - "This is
necessary to calculate air density and determine the
engine's air mass flow rate
(MAF
), which in turn is used to calculate the appropriate fuel
flow". Your fuel injected vehicle may have a
MAP sensor or a MAF sensor, depending on make, model
and year. By using sensing devices, your vehicle's
computer extrapolates what
the air/fuel
ratio is
based on the amount of oxygen in the exhaust, as
reported by the oxygen sensor.
Click Here for More Info
How the Oxygen Sensor Can Mess
With Your MPG
When a fuel saving device is
installed, such as an HHO hydroxy
electrolyzer,
the petroleum
based fuel is burned more
completely. One
of the results of this is that there is more oxygen (and
less unburned hydrocarbons) in the exhaust stream. This
is a good thing, and is in fact, what we are trying to
achieve, for increased mpg and fewer
emissions.
However, the computer will
perceive this condition as a "too lean" air/fuel mix. In other
words, what is now a desirable condition in the exhaust, will
be interpreted as "not enough gas",
and the computer
will direct the fuel injectors
to increase the amount of
gas being pumped
into the engine. This is bad.
The result is that the oxygen
sensor and computer prevent efficient combustion from
occurring!
How You Get More
MPG by Using an EFIE
The oxygen sensor "tells" the
computer what the oxygen content is by providing a voltage on
it's signal wire between 0 and 1 volt. 450 millivolts (.45
volts) means that the fuel/air mixture is correct. Higher
values means the mix is rich (has too much gas), and lower
voltages means the mix is lean. By adding voltage to the
sensor's output, we can compensate for the additional oxygen in
the exhaust.
The
Electronic Fuel
Injection Enhancer "EFIE" does exactly this. It adds a
floating voltage to the top of whatever the oxygen sensor
is putting out. It has an adjustment that allows you to
control, to within a few millivolts, the amount of this
added voltage. This allows the computer to be
unaware of the additional oxygen content
of the exhaust, and the electrolyzer can now achieve it's
full potential in fuel savings.
Most cars have oxygen sensors
both before and after the catalytic converter. The ones
downstream from the converter do not need to be treated. Their
data is used to determine when the converter has gone bad,
but are not
used in the air/fuel calculations. EFIEs are only needed
for all upstream oxygen sensors.
If you are installing an
electrolyzer for a fuel injected vehicle,
go
Here and get your
EFIE
today - it's a great resource for learning about what you
need.
Buy or Build Your Own EFIE for Max MPG
Or, if you want to make your
own EFIE, you can save a little if you buy
Water4Gas -
which includes plans to build your own EFIE along with your
hydrogen electrolyzer and start spending less money on fuel
today!
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