Goal
Enable existing internal-combustion engines to run on a 70 % water / 30 % ethanol (or other water-soluble alcohol) blend, reducing emissions and increasing torque with minimal hardware changes.
Problem
Reliance on fossil fuels, high carbon, nitrogen- and sulfur-oxide emissions, and the need for a renewable fuel that can be used in existing engine platforms without costly infrastructure changes.
Concept Summary
A modified internal-combustion engine injects a high-pressure water-ethanol (or water-alcohol) mixture into the cylinder. The mixture is compressed to a high pressure, ignited, and the resulting hot gases and steam expansion generate mechanical power. The high water content prolongs cylinder pressure, raising mean effective pressure and torque while suppressing NOx/SOx formation. The system can be adapted to piston, rotary, or jet engines and may include a small on-board hydrogen source (brown-gas) to further enrich the charge.
Principles
- Homogeneous Charge Compression Ignition (HCCI)
- Multi-stage combustion
- High compression ratio operation
- Water-fuel heat-absorption effect
Scientific Domains
Materials
- Water
- Ethanol
- Iso-propyl alcohol
- Other water-soluble alcohols (iso-butanol, propyl alcohol, etc.)
- Acetone
- Aldehydes (formaldehyde, acetaldehyde, etc.)
Mechanisms of Action
- Injection of water-ethanol droplets into the combustion chamber
- Compression of the liquid-gas mixture to raise temperature
- Ignition by spark plug or high-energy ignition system
- Steam expansion adds to piston work
Energy Sources
Applications
- Power generators (20 kW - 120 kW)
- Automotive engines
- Marine propulsion
- Industrial diesel-type engines
Claimed Performance
Additional power and torque through multi-stage combustion; significant reduction in carbon footprint; quieter operation; elimination of nitrogen and sulfur oxide emissions.
Experimental Evidence
The inventors built a prototype by modifying a 400 cc off-the-shelf diesel engine and operated it with a 70 % water / 30 % iso-propyl-alcohol fuel at injection pressures up to 2000 psi. No quantitative performance data were provided.
Replication Status
Prototype demonstrated; no independent replication reported.
Limitations
- Requires high-pressure fuel injection system
- Hydrogen generation (brown-gas) adds complexity
- No published quantitative efficiency or emissions data
- Potential corrosion from water-rich fuel
Red Flags
- Claims of "significant reduction" in emissions without supporting measurements
- Reliance on a proprietary hydrogen-generation method that is not described in detail
- No independent third-party testing reported