LeefH2: Comparison of Hydrogen Combustion within Engine
A detailed comparison showcasing how hydrogen enhances the combustion within the combustion chamber of the engine.
LeefH2™ Technology
LeefH2™: The Future of Clean Combustion™
Hydrogen enhanced combustion technology for diesel engines and anything that burns fuel.
What is LeefH2™?
Leveraging Energy Efficient Fuel with Hydrogen
LeefH2™ is HNO International’s advanced hydrogen-assisted fuel optimization technology, designed to improve fuel efficiency, enhance engine performance and reduce harmful emissions for cleaner transportation.
Rather than replacing engines, LeefH2™ integrates directly with the fleet you already run. Pure hydrogen is generated on demand from distilled water using efficient PEM hydrolysis — no chemical storage, no pressurized hydrogen tanks.
The LeefH2™ Advantage
Better for Your Fleet Better for the Planet
Better Fuel Economy
Improves combustion efficiency to deliver 10–20% better fuel economy.
Enhanced Engine Performance
Increases power, torque and throttle response for smoother driving.
Lower Emissions
Reduces harmful emissions by up to 50% for a cleaner environment.
Hydrogen-Assisted Technology
Utilizes safe hydrogen production for efficient and reliable engine optimization.
Featured Videos
Discover LeefH2™ Technology in Action
LeefH2: The Future of Clean Combustion — Truck Fleets
See how LeefH2™ is transforming truck fleets with cleaner combustion, lower emissions, and optimized engine performance.
Technology Insights
How Hydrogen Changes the Burn
01 Insight
Hydrogen-Enhanced Combustion
How It Works
The LeefH2™ hydrogen-enhanced combustion cycle: how trace, on-demand hydrogen accelerates flame propagation inside the combustion chamber.
02 Insight
Environmental Impact
Combustion Engines: Environmental Impact
Why clean combustion is critical for industrial, trucking and marine logistics in the coming decades.
Under the Hood
Core LeefH2™ Technology
Efficient PEM Hydrolysis
Splits pure/distilled water into highly pure hydrogen (99.99%) and oxygen on demand.
Safe & Dry Operation
Generates gas instantly as needed. No chemical storage, pressurized hydrogen tanks, or risk of deflation.
Chemical-Free
Functions strictly on pure water. Eliminates highly corrosive strong acids or alkaline (KOH/NaOH) additives.
OBD-II Smart Control
High precision 7nm U.S. control chip integrates seamlessly with the engine’s onboard OBD port.
Microsecond Ignition Algorithm
Reads engine injection, ignition and shift timing to release trace hydrogen at the precise microsecond.
Ultra-Low Draw
Minimizes battery load to just 2W for computer processing, lowering thermal and electrical stress.
Model: H-Power
LeefH2™ for Engines 7.0L and Below
- Applicable Engines: 7.0 Liters and below (Gasoline, Diesel, LPG, Hybrid)
- Fuel Economy Improvement: 15% to 20% average savings
- Horsepower & Torque: Boosts engine performance by more than 25%
- Driving Experience: Eliminates gear shift setbacks and latency
- Maintenance Benefit: H₂ combustion deeply cleans engine carbon deposits
$2,150.00 USDFor multiple unit and/or fleet sales, call 844-466-5333 (HNO-LEEF)
H-Power technical specification
| Parameter | Unit / Metric | Technical Specification |
|---|---|---|
| Model Name | / | H-Power |
| Applicable Engine Displacement | Liters | 7.0 and below |
| Microcomputer Interface | / | 16 pins, OBD-II Plug |
| Operating Power (Control Unit) | Watts | 2 W |
| Maximum Generator Operating Power | Watts | 80 W |
| Maximum Hydrogen & Oxygen Output | ml/min | 450 ml/min |
| Input Voltage | Volts | 12 V |
| Output Current | Amps | 0–20 A (Factory Setting: 10 A) |
| Water Tank Capacity | Liters | 2.0 L |
| Water Quality Requirement | / | Pure or Distilled Water (Conductivity < 2 µS/cm) |
| Generator Cabinet Dimensions | cm | 22 × 20 × 22 (H) |
| Packing Dimensions | cm | 32 × 28 × 39 (H) |
| Packing Weight | kg | 11 kg |
Model: DH-Power
LeefH2™ for Engines 8.0L to 16.0L
- Applicable Engines: 8.0L to 16.0L Heavy Diesel (Logistics, Transit, Fleet)
- Fuel Economy Improvement: 10% to 18% heavy-haul fuel savings
- Exhaust Emissions Reduction: Cuts harmful diesel emissions by 50%
- Torque & Pulling Power: Increases climbing torque under maximum payload
- Industrial Safety: Durable steel cabinet casing with multi-voltage support (12V/24V)
$3,475.00 USDFor multiple unit and/or fleet sales, call 844-466-5333 (HNO-LEEF)
DH-Power technical specification
| Parameter | Unit / Metric | Technical Specification |
|---|---|---|
| Model Name | / | DH-Power |
| Applicable Engine Displacement | Liters | 8.0L to 16.0L (Designed for heavy fleets) |
| Microcomputer Interface | / | 16-Pin OBD Plug (Optional 9-Pin Round Connector) |
| Operating Power (Control Unit) | Watts | 2 W |
| Maximum Generator Operating Power | Watts | 160 W |
| Maximum Hydrogen & Oxygen Output | ml/min | 900 ml/min |
| Input Voltage | Volts | 12 V / 24 V |
| Output Current | Amps | 0–25 A (Factory Setting: 15 A) |
| Water Tank Capacity | Liters | 4.0 L |
| Water Quality Requirement | / | Pure or Distilled Water (Conductivity < 2 µS/cm) |
| Generator Cabinet Dimensions | cm | 35 × 22.5 × 40 (H) |
| Packing Dimensions | cm | 46 × 36 × 49 (H) |
| Packing Weight | kg | 20 kg |
Custom Integration
Custom Systems for Very Large Engines (50,000–100,000 HP)
Tailored hydrogen production arrays designed for blending hydrogen with the fuel of large-scale commercial marine vessels, container ships, massive diesel generator plants, bunker fuel engines and other shipping systems. We are currently accepting custom integration consultations.
Verified Road-Test Logs
Measured on Heavy-Duty Cargo Fleets
Fuel consumption recorded before and after LeefH2™ installation on fully loaded heavy semi-trailers.
15.5%
Fuel Savings
Auman Heavy Semi-Trailer · 11.6L · 460hp
15.0%
Fuel Savings
FAW Jiefang Heavy Semi-Trailer · 11.05L · 460hp
25%+
Performance Increase
LeefH2™ H-Power
Up to 50%
Lower Emissions
LeefH2™ DH-Power
Road-test telemetry
Heavy-Duty Fleet Cargo Vehicles
| Vehicle | Before LeefH2™ | With LeefH2™ | Economy Rate |
|---|---|---|---|
| Auman Heavy Semi-Trailer (11.6L, 460hp, Fully Loaded) | 33.0 L/100km | 27.9 L/100km | 15.5% Fuel Savings |
| FAW Jiefang Heavy Semi-Trailer (11.05L, 460hp, Loaded) | 34.4 L/100km | 29.2 L/100km | 15.0% Fuel Savings |
Assurance
Certified, Warranted and Built to Last
Certifications & Qualifications
Full CE and FCC compliant testing completed.
Warranty Program
H-Power and DH-Power units carry a standard 2-year full warranty.
Service Life
Running on pure water alone — with no corrosive acid or alkaline additives — keeps the cell clean and extends operating life.
Let’s Build Together
Interested in LeefH2™? Inquire Today
Tell us about your engines or fleet and our team will come back to you with the right configuration and pricing.