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Posts Tagged oxygen sensor

Digital EFIE Devices Increase Fuel Efficiency

Aug 5

Posted by Jermy Johnson in HHO Articles | No Comments

The Problem: Modern Vehicle Computers & Oxygen Sensors

Using an HHO generator is one of the many methods used to increase the efficiency of the engine’s combustion gasoline. One side effect of increased combustion efficiency is that additional oxygen appears in the exhaust. Modern vehicles equipped with oxygen sensors will detect this additional oxygen, informing the vehicle’s computer. The computer then incorrectly thinks that the air/fuel mix is too lean, and then richens the mix incorrectly. Thus resulting in wasted gasoline and negates any performance benefits.

The Solution: Compensate with EFIE

A simple solution exists: compensate for the extra oxygen in the exhaust to maximize fuel efficiency gains. Whether you are using an HHO generator or some other method to increase the combustion efficiency, a compensation method is required to unlock maximum fuel efficiency.  The Electronic Fuel Injector Enhancer (EFIE), when switched on, will alter the signal sent from the oxygen sensor to the vehicle’s computer. Instead of a lean condition being reported, a normal condition or rich condition is sent. This reduces the amount of fuel sent to the engine’s combustion chamber. These devices have been around for several years and many people have realized dramatic gains in fuel economy by using them in conjunction with an HHO generator. Since this is a mature product, innovation has revised and refined the design.

Innovation: Digital EFIE devices

Quad Digital EFIE - Up to 4 O2 Sensors

Quad Digital EFIE - Works with Up to Four O2 Sensors

Recently released, the Digital Narrow Band EFIE ushers in a new era in oxygen sensor enhancement. With this device, you can make your vehicle much leaner than with previous EFIE designs. It is also extremely stable despite changes in temperature. From -40C to 125C the variation is negligible (1/2 of 1% max). Older style EFIEs have trouble working with old, tired oxygen sensors, the new digital model works with any sensor that is still able to produce voltage.
The new Digital EFIE sensor operates differently from any current EFIE on the market. Click How Digital EFIEs Compare to read a comparison between the old and new designs. The comparison should help you make an informed decision on what to install.

Quad Digital EFIE Features

Quad Digital EFIE Features

Quad Digital EFIE Wiring Diagram

Quad Digital EFIE Wiring Diagram

Where to Purchase

The all new Digital Electronic Fuel Injector Enhancers (EFIEs) are available for purchase at the following link: EFIE Devices. You will find premade EFIE devices and help to find the right model for your vehicle.

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The Reason for Oxygen Sensor Adjustment

Sep 30

Posted by Jermy Johnson in HHO Articles | 1 Comment

This article describes the main reasons that the oxygen sensor needs adjustments when using s a fuel efficiency device such as an HHO electrolyzer. Additionally, products that solve or provide the oxygen sensor adjustments are presented.

Almost all modern vehicles, employ oxygen sensors to tell the vehicle’s computer if the air/fuel mixture is too rich or too lean. The computer uses the information from the 02 sensor to determine if more or less fuel should be added to the mix in order to maintain the correct proportion. Gas vehicle engines (as opposed to diesel engines) are designed to operate at an air/fuel ratio of 14.7 to 1. When these proportions are being supplied to the engine, a certain amount of oxygen will be detected in the exhaust by the 02 sensor, and this information is fed into the vehicle’s computer.

If more oxygen is sensed, the computer thinks the mixture is too lean (not enough fuel), and adds fuel to the mix. Likewise, if less oxygen is sensed, the computer thinks the mixture is too rich (too much fuel) and cuts back on the fuel fed to the engine.

There’s a big problem with this scenario as soon as you start adding a workable fuel efficiency device. For any given air/fuel ratio, burned more efficiently, the oxygen content in the exhaust will rise. If you have two or more efficiency devices installed, even more oxygen will be present in the exhaust. The oxygen content rises as the fuel is burned more efficiently for a number of reasons. Chief amongst these are:

a) less fuel is being used to produce an equivalent amount of horsepower, and

b) less oxygen is being consumed to create carbon monoxide in the exhaust.

The bottom line is there is more oxygen in the exhaust as the fuel burning efficiency is increased. So, now that we have spent time and money to install a fuel efficiency device or two, and we are getting a more efficient fuel burn, what does the vehicle’s computer do? It dumps gas into the mix in an attempt to get an oxygen reading in the exhaust equal to it’s earlier, inefficient setup. This will then negate the fuel savings of just about any efficiency device, and in some cases will actually cause an increase in fuel consumption, despite having a workable fuel efficiency device.

The Solution

The handling for this situation is simple. The signal coming from the 02 sensor needs to be adjusted to compensate for the increased fuel efficiency being achieved. Basically the added oxygen in the exhaust fools the computer into thinking the mixture is too lean, causing it to (incorrectly) richen the mix. We need to un-fool the computer so it continues to give us the same amount of gas as before. We do this by making it think there is less oxygen in the exhaust than there actually is. The amount of change to the signal has to be easily adjustable to accommodate the different types of efficiency devices that are available. The oxygen sensor produces voltages to communicate the oxygen content to the computer. When the sensor reads below .45 volts, that means it’s lean, and when it reads above .45 volts, it’s saying the mix is rich. If you connect your volt meter to an oxygen sensor signal wire and ground, while the engine is running, you’ll see the voltage is constantly changing, and you’ll probably see voltages in the range of .3 to .7 volts or so. In actual fact, the voltage is changing back and forth from about .1 volt to about 1.0 volts, several times per second. But a hand held meter is not quick enough to show this. The EFIE adds it’s voltage to the sensor’s voltage, which shifts the voltage that the computer receives towards rich. This causes the computer to provide less gas. Many people think we’re trying to fool the computer with an EFIE. That’s actually not accurate. The extra oxygen in the exhaust because of a more complete combustion is what’s fooling the computer. It’s making the computer think the mix is too lean, and it’s compensating by adding gas that is not needed. The EFIE is un-fooling the computer. All we want to do is get it back to giving us a 14.7 to 1 air/fuel ratio again. It should be noted that an oxygen sensor handling device, by itself, is not a fuel efficiency device. It possibly could be used to control the vehicle’s computer, and make the engine burn a little leaner, and this could possibly give a small increase in gas mileage. But this is not what it was designed to do. It was designed to complement, and in some cases make possible, increased gas mileage using other fuel efficiency devices. If you need to purchase an EFIE for your project, you can find them information below. We specialize in accessories for fuel saving devices such as the EFIE and have a number of different models to suit different applications and budgets.

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EFIE - 2 O2 sesors - handles 2 Oxygen Sensors

EFIE device - Single O2 sensor

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Electronic Fuel Injection Enhancers (EFIE) and HHO

May 13

Posted by Jermy Johnson in HHO Articles | 28 Comments

In the past, fuel savers would not work when applied to fuel injection because those systems are actually designed to prevent efficient combustion. Adding an HHO kit to your engine’s air-intake increases the combustion efficiency. In order to get the most MPG gains from the HHO kit, the oxygen sensor’s voltage needs to be externally regulated. This is because the vehicle’s factory computer does not know how to deal with the addition of HHO / Brown’s gas in the air intake system.

Increasing the combustion efficiency of an engine increases the exhaust oxygen percentage. Most fuel injection engines use an oxygen sensor to infer the air/fuel ratio of the engine, the increased oxygen content in the exhaust is ‘read’ by the computer to be a lean mixture in the engine. The computer then adds extra fuel to bring the pollution back to ‘normal’.

This problem led to the development of the Electronic Fuel Injection Enhancer (EFIE, pronounced Ee-Fy). The EFIE allows you to apply an offset to the voltage coming from the oxygen sensor, so your vehicle’s computer is completely unaware that the oxygen content of the exhaust has increased.

Only the O2 sensors in front of the catalytic converter should need the EFIE device as the ones behind the catalytic converter are there to make sure the one’s in front are doing their job.

More about HHO: The H2 and O being pumped into the system will react with themselves and then the additional oxygen being pumped in will react with the gasoline. However, since the H2 and O combust more efficiently, it will also increase the efficiency of the gasoline being burned resulting in more oxygen exiting your cylinder and thus making your catalytic converter work less.

How EFIE’s work:

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 from the HHO generator, 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.

Where to Purchase

There are kits/instructions available from sites that will tell you how to make your own EFIE, but if you don’t have time or the skill to make one there are stores that sell already build EFIEs. If you have purchased an HHO kit or are considering it for a fuel injected vehicle, go to EFIE Devices, to get an already assembled EFIE device.

EFIE - 2 O2 sesors - handles 2 Oxygen Sensors EFIE device - Single O2 sensor

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