Hydi Technology - How it Works

How do the HYDI units work?

The HYDI hydrogen on demand system supplies hydrogen gas to a diesel engine’s intake. On a mass-to-mass basis, hydrogen has three times the energy content of diesel and delivers a higher flame speed to improve combustion efficiency.  This powerful combination reduces fuel consumption, carbon and greenhouse gas exhaust emissions and increases performance.

HYDI diagram explained

In Simple Terms

The units generate Hydrogen gas from de-mineralized water without the need for re-gassing, pressurized hydrogen cylinders, or storage. The system produces Hydrogen on demand during engine operation, automatically shutting down when the engine is turned off. There is no separate hydrogen storage, as the unit creates its own hydrogen supply, introducing it into the combustion process through the air intake for a clean and efficient burn. The water chamber needs periodic refilling based on usage, such as 1 liter of de-mineralized water for approximately 30 hours of operation in a 15-liter engine. This approach is straightforward, environmentally friendly, and safe, making it suitable for use even in remote areas.


Sophisticated safety features ensure the HYDI Unit
does not store hydrogen and only produces it
while the engine is running.


Durable welded 316 stainless-steel construction
ensures the HYDI Unit performs optimally in harsh


A HYDI Unit offers rapid return on investment
based on fuel cost savings.


Cutting-edge electronics allow HYDI Units to
minimise the electrical input required for
maximum output of hydrogen.


HYDI Units use the latest technology. Electronics
monitor and optimise hydrogen production while
Bluetooth enables the operation status to be
displayed in real time.


The effectiveness of our units has been proven
over years of field trials. Independent testing at
the University of South Australia is validating
our results.


HYDI Units do not contain or require any base
chemicals, just demineralised water.

In Simple Terms

Environmental Impact

HYDI is taking on climate change.

The HYDI Unit:

Reduces global diesel emissions from internal combustion engines.

Removes particulates emissions up to 80%.

Removes carbon monoxide up to 25%.

Estimate the contribution you could make to achieving net zero carbon emissions below.

Economic Impact

A rapid return on investment leading to increase profit due to reduced operating costs.

The HYDI Unit:

Reduces fuel consumption for heavy transport, buses, generators and marine applications by 8% to 14%.

Lower service costs and maintenance downtime due to a cleaner running engine from reduced carbon deposits.

Offers a potential income stream from carbon credits if accredited within applicable jurisdictions.