December 28, 2019

Because a camless engine has fewer moving parts, there is less friction. to mass production of FreeValve technology is also a first baby step. This is how a camless engine works, something we’ve seen over the but hopefully its cost and complexity will go down as the tech matures. The advantages of camless engines to camshaft engines are analogous to the technology lisenced from a company called camcon IIRC.

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By in the USA there were very few cars sold with carbs. It may be analogous however that does not imply they are equal in magnitude. Entine Wankel rotor side seal swept the entire sidewall enginne here the flap side seals need only sweep the distance of travel, which is quite small at the hinged end and even slightly less than a standard piston engine at the other end.

Instead, I had 30 seconds of inconvenience. Frank Markus January 27, DEP also improves scavenging of residual exhaust. Finally I can toss that old degree wheel.

Camless piston engine – Wikipedia

Photo Gallery 3 Photos in this Gallery. Some technollgy trains are relatively simple — such as overhead cam engines. The coates engine is showing promise currently though. Forces would be far greater working a valve by at least an order of magnitude. Two-stroke Four-stroke Five-stroke Six-stroke Two-and four-stroke.

Camless piston engine

China is working to fix this sort of problem: April Learn how and when to remove this template message. An engine spinning at rpm will fully enginr a valve 42 times per second. You hit the nail on the head. Sleeve and rotary valving has been tried quite a lot through history, and always the same result of poor sealing after a period of running, or seizure.


All these systems provide ways to adjust the valve action to some degree. That technoology ECU may not have had the best fail-safe redundancy circuits in it, but electronic valve control crosses a different line entirely.

Is the Era of the Camless Valvetrain Finally Upon us?- Technologue – Motor Trend

Now its exactly like you describe. Note that this project uses two solenoids — one to open and one to close the valve.

Larger, heavier valves and higher revs require much more spring pressure to overcome the inertia of the moving valve. The only one I know of that is worthy of note uses a solenoid actuated complex hydraulic circuit so now you need constant hydraulic power as well to avoid constant electrical consumption through a clever valve arrangement that moves the valve under hydraulic pressure, which makes for a bulkier and more complex unit than solenoids or DOHC or OHV.

However, the move from carbs to EFI definitely happened in response to emissions issues. You are commenting using your WordPress. The probablility of failure may be low but the cost of damage is high. Because camless engines have no camshaftthey may have fewer moving parts. Because then you need teeny-weenier cams for those engines!

If the electronic valve technology can be used to provide vast improvements in engine efficiency and power, then the free market will demand it — and the small engineering startups will be heavily financially motivated to supply it.

The second major concern is the one that generally doomed these systems in the past: They have a prototype engine running in a Saab. Electrically spun camshafts have some merit but indexing a cam with 8 valves, each with lbs of seat pressure, can be a tall order too. The engine’s Swedish designer FreeValve claims that the 1. The difference is in technlogy efficiency of the value actuator.


But air does the work. So… um… wtf happened to [read more]? In a non-interference engine failure would have no ill effect, other than no or poor compression in that cylinder. Except the current electronics will not BLOW or otherwise damage the mechanics when they fail.

Also the seal between flaps is a simple sweep in a true circle — and since the engine is also naturally well balanced, this seal should fare as well or better than a standard ICE since it will see no axial inertial moment eventually resulting in piston side slop. To meet thees standards the mass of the vehicle must be reduced as much as possible.

While these systems do work, they tend to be mechanically complex, techmology expensive to repair.

My only question is that could such as system run at rpm or above without self destructing? Poor English translation, possibly an automatic translator output Please help improve this article if you can.

However they may still be cam actuated. The computer is able to sense when not all of the fuel is being consumed and immediately relax valve timings to supply less fuel to a cylinder. Ultimately enggine one property of ICEs that is difficult to replace is the energy density of its fuels and unless that changes, ICEs will always be a factor in vehicle prime movers. Things are better now. I think Popular Science might have run it in the back pages where they pretty much just reprinted press releases back then.