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Porsche develops high-performance hydrogen engine

Porsche is committed to electric powering its future lineup, but it doesn’t want to get rid of the internal combustion engine entirely. especially when it comes to 911.

That’s why the company is developing solutions to clean the exhaust of internal combustion engines, including hybrid systems and engines with improved thermal efficiency, both of which help reduce emissions. The company is also growing synthetic fuel, can mean complete carbon neutral combustion.

Another promising solution is an engine instead of gasoline that burns hydrogen. When hydrogen is burned, carbon emissions are reduced to zero. This technology is not new. For example, in 2006, BMW introduced a 7-Series with V-12 can run on hydrogen. The main modifications concern the fuel tank and fuel injectors.

So what are the downsides? Besides lacking a steady supply of hydrogen, such an engine also emits harmful nitrogen oxides. However, there are ways to mitigate this, such as using the urea-based selective catalytic reduction process found in modern diesel engines. Hydrogen can also be produced without emissions, using renewable energy to split water into hydrogen and oxygen, something Porsche is working on. also test in the field of synthetic fuels.

Matching the power of the petrol engine is also an issue, although Porsche seems to have found a solution. Operating entirely in the virtual world, Porsche is testing an older version of the 4.4-liter V-8 designed to run with a higher compression ratio and a new turbocharger system. According to the automaker, to cleanly burn hydrogen, turbos need to deliver about twice the volume of air they do in gas engines, although this is a challenge due to the low temperatures and pressures of the exhaust gases. than when igniting hydrogen.

To compensate for the lack of pressure, engineers designed various turbo systems with electric compressors. The key is a unique arrangement for two compressor stages, driven by either the exhaust manifold or a powered electric motor. Basically, the air passes through the compressor first, is cooled in the intercooler and then re-compressed in the second stage.

Porsche says the hydrogen engine produces 590 horsepower, similar to what the original gas-powered version delivered. Porsche simulated the engine on a 5,842 lb car (which is Cayenne territory), and for a virtual Nürburgring lap the resulting time was around 8:20. Not bad for a heavy vehicle.

Don’t look for a hydrogen-powered Porsche anytime soon. The carmaker says the goal of the project is to test the engineering potential of the technology and expand the capabilities of existing engineering tools so that a hydrogen-burning engine is ready if demand is to be required. .

Porsche isn’t the only automaker looking at high-performance hydrogen engines. Another company, Toyota, is testing a racing car with hydrogen engineas well as a V-8 is designed to run on hydrogen.

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