H2 is a very diffcult fuel to burn in an engine -it wants to explode all the time and at all mixture ratios.
Combustion chamber temperature control is critical.
Pivotal have even gone as far as water cooling their "pistons":
http://www.pivotalengine.com/hydrogen.html
Depends what kind of engine too - there has been some amazing work done on Sterling engines lately...
I believe that combustionproblmes can be relatively easily fixed by tweaking, as opposed to innovation. The advances in direct injection engines, and high speed engine management by computers will be able to deal with that easily enough.. (IMO)
All very interesting. However one person says H2 has a lower 'energy density' than petrol, one says the opposite. I'm lazy today and can't be bothered googling it, so what's the answer? Or does it vary?
>> test tube of Hydrogen in a test tube<<
Rule - Don't answer phone mid-post.
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