Reply #16: Not too bright this one.... [View All]

[HysteryDiagnosis]

http://www.hy-drive.com/main/Default.asp?Page=88


The first studies were carried out by NASA’s Jet Propulsion Laboratory in Pasadena, CA.

“The J.P.L. concept has unquestionably demonstrated that the addition of small quantities of gaseous hydrogen to the primary gasoline significantly reduces CO and NOx exhaust emissions while improving engine thermal efficiency”

A study at the University of Calgary by G.A. Karim on the effect of adding hydrogen to a methane-fuelled engine says:

“... the addition of some hydrogen to the methane, speeds up the rates of initiation and subsequent propagation of flames over the whole combustible mixture range, including for very fast-flowing mixtures. This enhancement of flame initiation and subsequent flame propagation, reduces the ignition delay and combustion period in both spark ignition and compression ignition engines. This should lead to noticeable improvements in the combustion process and performance.”

SAE Report: A Before Treatment Method for Reduction of Emissions in Diesel Engines
(SAE Tech Paper 2000-01-2791, Bade Shrestha et al) Emission Reductions:

* PM 60%
* CO 30%
* NOx 19%


CEE Analysis: Heavy-Duty Exhaust Emission Test Report
Emission Reductions:

* HC 74.5%
* CO 14.6%
* NOx 11.1%
* PM 81.4%


SAE Report: Performance and Fuel Consumption Estimation of a Hydrogen-Enriched Gasoline Engine at Part-Load Operation
(SAE Tech Paper 2002-01-2196, Fontana et al) Reduction in Fuel Consumption:

* 12% to 50% over range of torques


Additional useful reading on the efficacy of hydrogen injection may also be found in:

Investigating combustion enhancement and emissions reduction with the addition of 2H2 + O2 to a SI engine (SAE Tech Paper 2003-32-0011, D’Andrea et al)

Spectral analysis and chemiluminescence imaging of hydrogen addition to HSDI diesel combustion under conventional and low-temperature conditions (SAE Tech Paper 2004-01-2919, Lu et al)

Hydrogen addition for improved lean burn capability of slow and fast burning natural gas combustion chambers (SAE Tech Paper 2002-01-2686, Tunestal et al)

Experimental evaluation of SI engine operation supplemented by hydrogen gas from a compact plasma boosted reformer (SAE Tech Paper 2000-01-2206, Green et al)

Influence of hydrogen-rich-gas addition on combustion, pollutant formation and efficiency of an IC-SI engine (SAE Tech Paper 2004-01-0972, Conte et al)

A numeric investigation of NOx formation in counterflow CH4/H2/Air diffusion flames (IMECE 2006-14458, Guo et al)

While Hy-Drive continues to establish Hydrogen as solution for the inefficiencies of the combustion engine, others are also pursuing hydrogen-enhanced combustion. Click here for more details.