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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Same energy delivered to the valve. It can sense when there is a high amount of NOx and SOx Sulfur oxide emission and change the timing to make the exhaust acmless hotter or cooler. The average hacker could modify a small four-stroke engine for camless operation in their workshop. Maybe some of the back EMF can be dumped into an adjacent valve cycle to reuse the energy.

Could lead to some interesting cylinder configurations.

Camless piston engine

So, as a direct result of government regulation you now have more highway deaths, all for some marginal MPG improvements see:. At the core, a fuel injector is a solenoid controlled valve. Because then you need teeny-weenier cams for those engines!

Multiple times in the last couple weeks this has happened. Sorry hit the report button by mistake. Which leads to thicker wires, massive transistors with massive heatsinks and massive EMI.

Just doing away with [continue reading] and putting the whole wall of text camlesa front? You could have the cam pull the valves closed also, but the advantage of springs is they compensate for wear.


Add a power source and some solenoids. It also allows multiple lift events per cycle and, indeed, no events per cycle—switching off the cylinder entirely. The simple solution would be to go with a camless engine. Stock photography by izmostock. Most car engines spend enginee of their lives operating in a very predictable, narrow band of operating conditions, so optimizing camshaft profiles for that scenario is not a big deal.

Camless is a massive pain in the ass. Wankel is not that unreliable.

Video shows inner workings of Koenigsegg’s camless engine

The specific problem is: Valves open and close, injectors mist fuel, spark plugs fire, and pistons move up and down. As installed on a Chinese Qoros 1. By using our website and services, you expressly cammless to the placement of our performance, functionality and advertising cookies. Now… The valve lifter: 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. Activation current is really low.

More glass, a more complicated process to shape and form, more hazardous chemicals, ballast electronics, etc. With a cammed setup, you have two metal objects smacking into each other, with nowhere else to go.

Poor English translation, possibly an automatic translator output Please help improve this article if you can. Everything comes at a cost though. Every such efficiency-boosting miracle like this further delays the demise of the combustion engine. That old ECU may not have had the best engne redundancy circuits in it, but electronic valve control crosses a different line entirely. The camshaft rotates at half the rate of the crankshaft. The drive transistor probably fails short open valve.


These route the flow from half the exhaust valves to the turbo while the rest bypasses it, eliminating the need for a turbo wastegate. 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. That design demanded valves that opened far more quickly than a traditional cam-driven design could manage.

What VW did was wrong, but lest at least explore why they were motivated to cheat. Check out my YouTube channel for many rotary valve videos. It seems that the engine would be much less likely to crash the valve engibe and self destruct that way.

Actually no regulation comes without the approval of at least some of the industry players. The main problem with back EMF is overloading the ehgine that drives the coil. So compressed air opens the valve almost instantly, electronically controlled hydraulic pressure holds it open, a coil spring closes it, and passive hydraulic pressure cushions its “landing.