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Toyota and Yamaha R&D on a hydrogen powered V8



rubydist

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There is plenty of ability to generate hydrogen in a "clean" way, unlike electricity (in spite of what your clean planet friends think).
 

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I think the big issue is cost and the amount of energy it takes to make hydrogen. Everything I’ve read on the subject, fuel cells are the most efficient way to use it.

Even with the ICE route, there is little in the way of negatives as far as emissions go. You burn hydrogen and get heat and water as the emissions. Of course, fuel mileage sucks but it’s do able.

Then there is the storage tank problem. You need a huge storage capacity for equivalent distances between refueling if you go ICE. Fuel cells greatly reduce the required fuel needed. But you are back to the cost and availability for refueling locations.
 

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You burn hydrogen and get heat and water as the emissions.
All that heat and water is gonna raise the sea levels. WE"RE DOOOOOOOOMED :fie:
 

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I think the big issue is cost and the amount of energy it takes to make hydrogen. Everything I’ve read on the subject, fuel cells are the most efficient way to use it.

Even with the ICE route, there is little in the way of negatives as far as emissions go. You burn hydrogen and get heat and water as the emissions. Of course, fuel mileage sucks but it’s do able.

Then there is the storage tank problem. You need a huge storage capacity for equivalent distances between refueling if you go ICE. Fuel cells greatly reduce the required fuel needed. But you are back to the cost and availability for refueling locations.
The ICE route has the nasty long term negative of hydrogen embrittlement. Those nasty little hydrogen atoms get between the aluminium atoms of the piston, and make the top brittle. Then, suddenly it catastrophically fails - that was historic issue. Now, better metals might have fixed that, but older engines would be susceptible.
 

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hydrogen embrittlement shouldn't effect the piston tops unless something hits them though, right? brittle is fine as long as nothing hits them and compression doesn't suddenly increase?

but doesn't heating them pistons during combustion also release the hydrogen embrittlement? i think we have to bake our parts for a certain amount of time to fight hydrogen embrittlement during plating processes where i work. (not specifically in the shop i work, we have a plating shop)
 

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Compression increases suddenly every power stroke during compression - although the direction reversal between exhaust and intake might be higher force

The combustion is what is forcing not yet burned hydrogen into the pistons - it effectively baking it in.
 

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Toyota can't do anything themselves anymore. Needed the damn Krauts to make their new supra.. apparently enlisting another manufacturer to make a new mr2.. help from yamaha.. pfft.
 

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Toyota can't do anything themselves anymore. Needed the damn Krauts to make their new supra.. apparently enlisting another manufacturer to make a new mr2.. help from yamaha.. pfft.
They aren't the only ones. Lotus uses an Toyota engine in the Elise.
 

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