Hydrogen combustion enhancement.
On-demand hydrogen-oxygen gas, generated from purified water by a PEM stack and drawn into the engine air intake while the engine runs.
What is hydrogen combustion enhancement?
Hydrogen combustion enhancement introduces a small hydrogen-oxygen gas stream into the air intake of a running engine. Hydrogen burns faster than diesel, so the flame front spreads more quickly and the fuel charge burns more completely within the same crank angle. The gas is produced on demand by a PEM electrolyser, is never stored, and the engine keeps running on its normal fuel.
- Gas source: proton-exchange-membrane (PEM) electrolysis of purified water
- No caustic electrolyte — no KOH or NaOH carry-over into the air path
- No onboard hydrogen storage; production stops when the engine stops
- Injection point: air intake upstream of combustion
- Fuel system, ECU and emissions after-treatment remain unmodified
- Installation is non-destructive and fully reversible
- Engine range
- 1.0 – 16.0 L
- Supply
- 12 / 24 V DC
- Water
- Purified, TDS ≤ 5 µS/cm
- Start / stop
- Vibration sensor
The terms, precisely.
PEM electrolysis
Splitting purified water into hydrogen and oxygen across a solid polymer membrane. No liquid alkaline electrolyte is used, so nothing corrosive can travel down the gas line.
Hydrogen-oxygen mixed gas
The combined output of the stack, delivered as a single low-pressure stream in litres per minute. It is consumed immediately; nothing is compressed or stored.
Combustion enhancement
Improving how completely and how quickly the existing fuel charge burns, rather than substituting the fuel. Diesel flow is still controlled entirely by the factory ECU.
Water to cylinder, step by step.
1 · Water
Purified water at TDS ≤ 5 µS/cm is held in the onboard reservoir and polished by a resin filter.
2 · Electrolysis
The PEM stack draws 12 / 24 V DC from the vehicle or genset battery and splits the water.
3 · Gas line
Hydrogen and oxygen leave as one low-pressure stream through the supplied line.
4 · Intake
The stream is teed into the air intake upstream of combustion and mixes with intake air.
5 · Combustion
The faster-burning hydrogen raises flame speed inside the cylinder during the normal burn.
Deeper detail on the stack itself is on PEM electrolysis and thermal efficiency.
Matching a unit to an engine.
| Unit | Displacement | Typical use |
|---|---|---|
| A-450 | 1.0 – 1.8 L | Light commercial vehicles, vans |
| A-675 | 2.0 – 2.5 L | Utes, light trucks |
| A-900 | 2.7 – 7.0 L | Medium trucks, 20–30 kW gensets |
| H-900 | up to 7.0 L | Heavy-duty road transport |
| D-900 | up to 16.0 L | Prime movers, road trains, large gensets |
Side-by-side current draw and gas output are on Compare PEM systems.
Questions.
What is hydrogen combustion enhancement?
- It is the introduction of a small, continuously generated hydrogen-oxygen gas stream into the air intake of a running diesel or gas engine. The gas is produced on demand by a PEM electrolyser from purified water and is consumed immediately in the cylinder. It is a combustion aid, not a fuel replacement.
Does it replace diesel?
- No. The engine continues to run on its normal fuel and its factory fuel system is untouched. The hydrogen-oxygen stream is a combustion enhancer measured in litres per minute, not a substitute fuel.
Is hydrogen stored on the vehicle?
- No. There is no cylinder, tank or accumulator. Gas is generated only while the engine is running — the vibration sensor starts and stops the unit with the engine — and is drawn straight into the intake.
Does fitting a unit modify the engine?
- No. Installation is non-destructive and fully reversible: the unit is mounted, wired to 12 V or 24 V DC, and a gas line is teed into the air intake upstream of the turbo or throttle body. No changes are made to the fuel system, ECU or emissions after-treatment.
Continue reading.
Engine performance improvement
Flame speed, burn completeness and load response on diesel engines.
Fuel efficiency
How to baseline and measure litres per 100 km or litres per hour.
Emissions reduction
Soot, particulate and unburnt-fuel behaviour, and how to test it.
Installation guide
Nine-step fitting sequence: mounting, wiring, gas line, commissioning.
Safety & compliance
On-demand gas, no storage, alarms, shutdowns and reversibility.
Troubleshooting
Alarms, low gas output, water quality and no-start diagnostics.
Case studies & field results
Published operator data and trial methodology.
Compare PEM systems
A-450 to D-900 side by side: displacement, output, current draw.
FAQ
Answers on fitment, water, warranty, freight and duty cycles.