Scientific Studies

Emissions and total energy consumption of a multicylinder piston engine running on a gasoline and a hydrogen-gasoline mixture

John F. Cassidy. NASA - National Aeronautics and Space Administration, Cleveland, Ohio 44135, USA

A NASA study (Technical Note D-8487) has demonstrated that adding hydrogen to gasoline significantly improves engine efficiency and reduces emissions. The research, conducted with a high-compression 7.4L engine, found that:

Increased Efficiency: Hydrogen addition extends the lean operating range, reducing fuel consumption without affecting power output.

Lower Emissions: NOx emissions were reduced by up to 80%, while CO emissions also decreased.

Better Combustion: Hydrogen increases flame speed, leading to more complete fuel combustion and smoother engine operation.

These findings align with the benefits of HHO kits, which produce on-demand hydrogen to enhance fuel economy and reduce environmental impact.

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On-Board Hydrogen Generator for a Partial Hydrogen Injection Internal Combustion Engine

John Houseman and D. J. Cerini. CALTECH California Institute of Technology. California, USA

This paper presents a groundbreaking solution for reducing NOx emissions and improving fuel efficiency in internal combustion engines through partial hydrogen injection. The authors developed a compact onboard hydrogen generator that produces hydrogen-rich gas from gasoline and air using a partial oxidation process. This hydrogen-enriched fuel allows engines to operate at ultra-lean air/fuel ratios, significantly lowering NOx emissions and increasing overall engine efficiency.

Key highlights of the research include:

Efficiency Gains: By injecting small amounts of hydrogen into the engine, the lean flammability limit of gasoline is extended, enabling combustion at air/fuel ratios as high as 30. This results in lower flame temperatures, reduced NOx emissions, and improved engine efficiency.

Practical Application: The onboard hydrogen generator is designed to be compact and efficient, making it suitable for automotive use. The system has been successfully tested in single-cylinder engines, V8 engines, and even in a vehicle, demonstrating its feasibility for real-world applications.

This technology offers a promising solution for reducing emissions and improving fuel economy, making it an attractive option for environmentally conscious consumers. By integrating this hydrogen generator into your HHO kits, you can offer customers a proven method to enhance their vehicle's performance while reducing their environmental impact.

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Investigation of the Effects of Hydrogen Addition on Performance and Exhaust Emissions of Diesel Engine

Mihaylov Milen, Barzev Kiril. University of Rousse, Bulgaria. FISITA World Automotive Congress. Barcelona.

This study investigates the impact of adding a hydrogen-oxygen mixture (generated via electrolysis) to the intake air of a diesel engine. The research demonstrates that hydrogen supplementation significantly improves combustion efficiency, leading to a 15% increase in engine power and enhanced fuel utilization. The superior combustion characteristics of hydrogen reduce heat transfer losses and optimize energy output.

Key benefits of hydrogen addition include:

Increased engine efficiency: more power with the same amount of fuel.

Lower fuel consumption: improved energy utilization reduces diesel dependency.

Cleaner combustion: potential reduction in harmful emissions.

These findings highlight the advantages of HHO kits, which enable diesel engines to run more efficiently and cost-effectively while contributing to environmental sustainability.

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Effect of Hydroxy (HHO) Gas Addition on Performance and Exhaust Emissions in Compression Ignition Engines

Ali Can Yilmaz, Ering Uludamar, Kadir Aydin. Çukurova University, Adana, Turkey

This scientific study demonstrates the significant benefits of using Hydroxy (HHO) gas as a supplementary fuel in compression ignition (diesel) engines. The HHO gas, produced through the electrolysis of water, was introduced into the engine without any modifications, resulting in improved performance and reduced emissions.

Key findings include:

Increased Engine Torque: The addition of HHO gas increased engine torque by an average of 19.1%, especially at higher engine speeds (above 1750 rpm), due to enhanced combustion efficiency.

Reduced Emissions: HHO gas significantly reduced carbon monoxide (CO) emissions by 13.5% and hydrocarbon (HC) emissions by 5%, thanks to the absence of carbon in HHO and its high flame speed.

Improved Fuel Efficiency: Specific fuel consumption (SFC) was reduced by 14%, as HHO gas promotes more complete combustion, leading to better fuel economy.

The study highlights that HHO gas, when used as a supplementary fuel, can enhance engine performance, reduce harmful emissions, and improve fuel efficiency, making it an excellent addition to diesel engines.

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Design and Applications of Hydroxy (HHO) System

Ali Can Yilmaz, Institute of Natural and Applied Sciences. Çukurova University, Adana, Turkey

This scientific study conducted at Çukurova University explores the design and application of a Hydroxy (HHO) gas system as a supplementary fuel for both compression ignition (diesel) and spark ignition (gasoline) engines. The HHO gas is introduced into the engine's intake manifold without any modifications. The study demonstrates significant improvements in engine performance, fuel efficiency, and reductions in harmful emissions.

Key findings include:

Increased Engine Torque: The addition of HHO gas resulted in an average 19.1% increase in torque for diesel engines and 32.4% for gasoline engines, especially at higher engine speeds.

Improved Fuel Efficiency: Specific fuel consumption (SFC) was reduced by 14% for diesel engines and 16.3% for gasoline engines, leading to better fuel economy.

Reduced Emissions: Hydrocarbon (HC) emissions were reduced by 5% for diesel engines and 6.7% for gasoline engines, while carbon monoxide (CO) emissions dropped by 13.5% for diesel engines and 14.4% for gasoline engines.

The study concludes that the HHO system is a cost-effective and efficient solution for improving engine performance and reducing emissions, making it an excellent addition to both diesel and gasoline engines.

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