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The Unfortunate Truth About Toyota's Hydrogen V8 Engine

Engineering Explained · 2.4M views · 2022-10-28 · 14:28

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Overview

Engineering Explained examines Toyota's hydrogen-burning V8 engine built with Yamaha and explains the practical problems of hydrogen combustion vehicles. It covers efficiency, storage and distribution issues.

On Hacker News

HN uses it as the go-to explanation of why hydrogen internal combustion engines do not make sense.

Recommended by 3 HN people across 4 months · HN mentions 2022–2024

Topics

Cars, EVs & motorcyclesRenewables, batteries & storage
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hydrogentoyotainternal combustionenergy efficiencyvehicles

What people said

drewg123 · 2023-10 · Strong recommendation

The YouTube channel Engineering Explained has an excellent video regarding why hydrogen is not a practical replacement for gasoline/petrol/diesel in a traditional internal combustion engine: [VIDEO]

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drewg123 · 2024-01 · Recommendation

Except containing hydrogen requires bulky tanks. I was curious, and googled.. It turns out the only hydrogen car I'm aware of that's on sale in the US (Toyota Mirai) weighs several hundred pounds more than the most popular EV in the US (Tesla Model 3).. ~4300lbs vs ~3900lbs. Except the Mirai isn't a pure hydrogen car.. its more of an EV with a hydrogen powered generator. I'm not aware of any purely hydrogen fueled cars on sale. i watched a fascinating YT video by Engineering Explained that went into the reasons why a pure hydrogen car is not practical ( [VIDEO] )

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gwbas1c · 2023-01 · Recommendation

> collect facts The physical properties and limitations of hydrogen are well-known. Many people repeat them in other posts in this thread. Here's a very factual explanation of why hydrogen internal combustion engines won't work: [VIDEO] (In summary, you can't compress hydrogen enough to fit in a reasonably-sized tank. The energy that it takes to compress hydrogen will be expensive.)

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Sources

Video by Engineering Explained, played through YouTube.

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