Alpine is exploring the possibility of putting the extreme Alpenglow concept into limited production as a road-going supercar with a hydrogen-combustion engine. First shown in 2022, the Alpenglow recently nudged closer to a potential production car when it became the Hy4 – a rolling prototype fitted with the brand's first hydrogen-fuelled ICE. It was due to conduct its first public demonstration at the recent World Endurance Championship round at Spa, Belgium, but failed to start.
This could cause some lag time problems that you will have to get around by other means.” Tardy added that mitigating engine knock is also a big challenge for hydrogen engines because it is flammable over a wider range of fuel-to-air concentrations than petrol is. Hydrogen burns at concentrations from 4% to 76%, whereas petrol vapour ignites from 1.4% to 7.6%. This means that – within a single combustion chamber – the mix of hydrogen and air can simultaneously be lean and rich.
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