Comments by "John Burns" (@johnburns4017) on "INFINITI Reinvents The Gasoline Engine — VC-Turbo" video.

  1. Koenigsegg in Sweden have developed a camless engine using pneumatically operated valves. The engine has no cambelt or camshaft making it smaller and lighter. The oil pump need not be as powerful reducing HP taken off the crank. Oil will last longer. A management system can make it run at an Atkinson cycle, 4-stroke or a 2-stoke cycle on the fly. Fiat use electric solenoids on the inlet valves of one engine. The Koenigsegg solution is much better than this complexity. It is best they ditch this complexity for camless engines. Koenigsegg are introducing a camless engine in one of their supercars.
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  2.  @mateuszzimon8216  the new Koenigsegg will have a camless engine.
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  3. Thanks Jason. This engine is over-complex. It even has two injectors per cylinder. I believe it was designed by the French. What are the advantages in the real world of driving? • Is fuel consumption twice as good? • It is lighter? • Is it smaller? • Are the emissions better? Makers are badly trying stop the rolling steamroller of EVs and electric battery hybrids. They are better off doing as Volvo are doing and going EV and hybrid only in their range, dropping 100% ICEs. They need to develop superior electricity generating engines. A constant speed engine can be much, much simpler. I advise Nissan to look at Liquid Piston's rotary design, which is now being used for electricity production, although for a large gun. Liquid Piston reversed the Wankel design with the rotor being oval and the engine casing triangular with the ports in the rotor. This is the only new engine design in 60 years. The piston/crank engine is by its design inefficient - 80% of the fuel in the tanks is wasted. Going via this route is a dead end. They need to wake up... and soon. EDIT: Auto Express state: What are the benefits? Fuel economy is said to be around 27 per cent better than for the 3.5-litre V6, and 10 per cent better than comparable 2.0-litre petrol rivals. Consumption is on a par with 2.0-litre diesels. Performance is said to be 10 per cent up on 2.0-litre turbo petrol rivals. That complexity is just not worth it for the little gain.
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