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Supplemental Hydrogen Injection for 10% Boost in Fuel Economy

Canadian Hydrogen Energy Company (CHEC) used the annual SEMA show to launch a smaller version of its Hydrogen Fuel Injection System (HFI LT) targeted at passenger vehicles and Class 1 to Class 4 light trucks up to 7.3 liters in displacement.

HFI introduces small amounts of hydrogen and oxygen, produced via an on-board electrolysis unit, into the intake manifold and thence into the fuel charge, improving combustion and permitting a leaner fuel mix, thereby delivering more power with about a 10% increase in fuel efficiency and reduced emissions.

The HFI device delivers the gas to the engine under pressure, thereby ensuring a constant flow even when the air intake pressure is high due to turbocharger boost. The gases are continuously available, aided by a separate on-board water supply that automatically replenishes the cell when needed.

The device contains both heating and cooling features that enable gas to be generated in extreme weather conditions. The only operator maintenance required is to occasionally refill the water supply. Even under commercial driving conditions, only one refill approximately every 3-4 weeks should be sufficient.

The vehicle battery provides the power for the electrolysis unit, and the output gas hose simply attaches to a standard input at the air intake manifold.

The original HFI HT Series was designed for application on Class 7 and Class 8 heavy duty trucks (7.3 to 16 liters). HFI HT has racked up more than 60,000,000 miles of testing and on road use.

CHEC expects the HFI LT Series will produce similar results in passenger cars: fuel savings and reduced emissions, lowered maintenance costs, more power and torque and fewer oil changes.

The original HFI HT system weights approximately 90 pounds and has a volume of 2 cubic feet.

(A hat-tip to Yueh!)




If the old one weighed 90 lbs, how much does the new one weigh?

tom deplume

Weren't similar claims made for water injection back in the 70s?

CK Seek

Questions :

1. What is the fuel efficiency achieved for heavy duty trucks?

2. If more hydrogen is injected into the combustion chamber, can the fuel efficiency improves further, say upto 25% or 30%?

3. Will there be any vapor residue left in the chamber that will cause rust and the range of water-iron problems?



allen Z

Normal combustion of organic fuels (alcohol, hydrocarbons, esters ethers, etc) produces water vapor as a byproduct. If the source of the H2 is onboard, and derived from energy in exhaust gases, then overall efficiency of the system may improve 20-30%. However, the waste heat recovery might as well go towards producing electricity for various power uses, or other forms of mechanical energy.

Lance Funston

This commercial device is 90lbs and fairly large. Small under-the-hood units are available on various website but their reliability and performance seem largely untested. Has anyone here seen any testing or research on these units?

Dwayne Batice

The only device that I have see that is worth anything is the H2DDI Unit. The H2DDI unit is sold by a company called Wildfire. http://w2ewildfire.com

I can only say that I have field tested these units and not under lab conditions. The response has been very good when we sold these units in 2006 but demands has gone way down for some reason. I have sold a few of these but I understand in talking to the developer, Corey James that the units are being retooled and being made better.


Scott Cramton

Has this system ever been tested on large engines? 3600HP
In addition, can a larger quantity of H2 be injected into the cylinder to improve the fuel efficiency as with cars that are completely operational on H2 (i.e. BMW)

Is Hy-drive or any other company interested in a joint venture to accomplish the above?

Dwayne Batice

Call them.... but joint venture to me sounds like a one way street.

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