Very cool cam less video - Fuel Economy, Hypermiling, EcoModding News and Forum

pgfpro · 10-21-2016, 01:24 AM

I love all the possibility's.
'Engineering Explained' tackles Koenigsegg's camless engine

Fat Charlie · 10-21-2016, 08:08 AM

Very cool cam less video

Impressive. But until they increase their animation budget, they're still going to need to use cams for their videos.

pgfpro · 10-21-2016, 10:55 AM

Quote:

Originally Posted by Fat Charlie

Very cool cam less video

Impressive. But until they increase their animation budget, they're still going to need to use cams for their videos.

LOL

I forgot the other video.

https://www.youtube.com/watch?v=Bch5B23_pu0

sheepdog 44 · 11-10-2016, 08:01 PM

https://www.youtube.com/watch?v=S3cFfM3r510

serialk11r · 11-11-2016, 01:49 AM

Interesting, they moved from pneumatic to electromagnetic, and that solenoid wire is a very reasonable size. I hope this is the solution we've been waiting for.

freebeard · 11-11-2016, 02:00 AM

47% more torque
45% more horsepower
15% better fuel economy
35% less emissions

The part I'd like to see explained is using it for a compressed air pump for regeneration. That sounds like an end run around the Scuderi patent.

Quote:

There's also no need for a throttle body and the packaging of the engine is more simplified compared to an engine using a camshaft system.

No pumping loses. When the Chinese actuators are on eBay, it will be possible to 3D print a VW 1600cc boxer head with a 4-valve hemi combustion chambers and a compressed air hybrid system. It would rev to 15,000rpm.

serialk11r · 11-13-2016, 03:25 AM

47% more torque is rather dishonest. They just turned the boost pressure up to get that.

A typical NA street engine with 1 cam profile produces something like 75Nm/L at 1500rpm, and around 100Nm/L in the midrange. With a big cam, you can get 120-130Nm/L at high speed, but that's it.

Ideal valve timing can get you maybe around 90Nm/L at low speed rather than 70-80, the same 120-130 at high speed, and maybe 110 in the midrange if the intake runners are tuned to work best there. The torque increase is more like maybe 3-5% peak, and 10-20% in "torque dip" regions. The torque increase over something with multiple cam profiles will be much smaller.

If these are commercialized and have reasonable power consumption that would be a dream come true. More power, more efficiency, less weight.

19bonestock88 · 11-16-2016, 02:09 PM

He also said in the video at on that redesigned cylinder head he was running 12:1 compression instead of the original 9:1, which would make substantially more torque as well... On an earlier video, he mentioned retrofitting a Saab 9-5, and gaining 20%, which sounds more reasonable... It sounds great, having a continuously variable valve opening profile...