The irony here is that camless engines are relatively easy to build. The average hacker could modify a small four-stroke engine for camless. The latest to catch my attention: engine valves that operate without camshafts. For decades the idea of electronically controlled electromagnetic. The “camless” engine developed by Koenigsegg sister company FreeValve edged closer to production on Friday with Qoros’ unveiling of a.

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Supercars December 31, The valve actuators are there on this design, albeit for only half the valves. Rather its usually the springs lose their compression and cause a chatter in the valves they control. Wait long enough, and Moore’s Law of increased computing power in smaller packages or just good ol’ human ingenuity eventually makes all great ideas practical. In a camless system the only force holding the valve would be the magnetic field of the solenoid and the inertia of the valve so piston contact may not be as damaging.

Electrohydraulic solenoids can handle those pressures but fail to give the response needed for even at modest RPMs which is why most of the software cammed engines are low rpm diesel. Retrieved from ” https: Camcon also discussed features and benefits in an article and video that was published in Autocar magazine [15] “New Valve Technology gives Petrols the Efficiency of Diesels”. This allows for the engine to run at a lower RPM, a feature useful in ships as it allows better low speed maneuvering while docking.


A pneumatic valvetrain also draws less energy from the engine than conventional cams.

Camless piston engine – Wikipedia

Qoros 3 equipped with pre-production Qamfree camless engine, Guangzhou auto show. Most Popular This Week.

I think Popular Science might have run it in the back pages where they pretty much just reprinted press releases back then. For more from the Guangzhou auto show, head to our dedicated hub. And then your poston moves upwards, trying to push all that stuff out. Its not CO, its not much NOx, but because you can see it as black smoke, the uneducated think that is bad stuff that is killing baby sea-lions. Solenoids or hydraulic actuators open and close the valves in an infinitely variable number of ways.

In the wankel, intake and combustion occur simultaneously, but in different parts of the housing. So the Wankel is an article all to itself -The materials science problems with apex seals are amazing. Sign up for our Daily Newsletter Get daily news, spy shots and more! SSC Tuatara prototype makes public appearance at Think outside the box here.

Possibly a high pressure common rail with an accumulator to work. VANOS works by allowing the camlesd to slightly rotate a few degrees relative to its normal timing, fngine to moving a tooth or two on the timing chain.

It can sense when there is a high amount of NOx and SOx Sulfur oxide emission and change the timing to make the exhaust gas hotter or cooler.

The engine valves are quite massive in comparison to the spool valves in a cars transmission, and must move much, much faster many more times. Not all that loud, Harleys are louder than the puch but at the same time I never heard myself at 55mph from a distance which is like having a wood sander between your legs at that speed: Yes its wrong, but do you see how over-regulation may have lead to some bad choices being made here? But bring it on. I know HaD writers are essentially volunteers with a low rate of compensation, but compensation should be based on quality- if you lack in quality then you should lack in being compensated.


Notify me of new posts via email. Even in the 70s there were lots of restrictions on what could and could not be done. The former has kept solenoids at bay, the later variable hydraulic systems.

Video shows inner workings of Koenigsegg’s camless engine

Fuel injection can engije off when there is sufficient pressure and add more fuel when there is less pressure allowing the engines to run closer to a perfect diesel cycle. Allegedly this is to reduce costs but the teams still find ways to spend massive amounts finding smaller and smaller loopholes.

Take Us With You! The team first employed this solution on the Scuderi Split-Cycle air-hybrid engine I first covered in June Then again, progress marches on. Um… cars already have electronics. A rotary engine uses a fixed crankshaft campess spins the entire engine around it. This is because the regulations have become political, and are not based on sound science.