Tag Archives: Valve

Empa's low-cost FlexWork digital valve train uses up to 20% less fuel in testing

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Full digital control over valve lift, opening and closing times for all valves, in a system ...

In this transitional period between the gasoline and electric ages, there’s still plenty of room, and plenty of motivation, for last-gasp improvements to the combustion engine – and a Swiss R&D facility says its electro-hydraulic, fully variable valve system is already delivering up to 20-percent fuel consumption reductions in testing.

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Category: Automotive

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Hyundai announces "world's first" Continuously Variable Valve Duration engines

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Hyundai/Kia have announced what they term the "world's first continuously variable valve duration" system

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai’s new valve tech is able to continuously change the duration of valve openings to suit driving conditions, which Hyundai says results in a 4 percent performance boost, 5 percent better fuel economy and 12 percent lower emissions.

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Category: Automotive

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Everything You Probably Didn’t Know About FOV In HMDs

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VR headsets have been seeing new life for a few years now, and when it comes to head-mounted displays, the field of view (FOV) is one of the specs everyone’s keen to discover. Valve Software have published a highly technical yet accessibly-presented document that explains why Field of View (FOV) …read more

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EF50: the Tube that Changed Everything

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From today’s perspective, vacuum tubes are pretty low tech. But for a while they were the pinnacle of high tech, and heavy research followed the promise shown by early vacuum tubes in transmission and computing. Indeed, as time progressed, tubes became very sophisticated and difficult to manufacture. After all, they were as ubiquitous as ICs are today, so it is hardly surprising that they got a lot of R&D.

Prior to 1938, for example, tubes were built as if they were light bulbs. As the demands on them grew more sophisticated, the traditional light bulb design wasn’t sufficient. For one, …read more

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EF50: the Tube that Changed Everything

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From today’s perspective, vacuum tubes are pretty low tech. But for a while they were the pinnacle of high tech, and heavy research followed the promise shown by early vacuum tubes in transmission and computing. Indeed, as time progressed, tubes became very sophisticated and difficult to manufacture. After all, they were as ubiquitous as ICs are today, so it is hardly surprising that they got a lot of R&D.

Prior to 1938, for example, tubes were built as if they were light bulbs. As the demands on them grew more sophisticated, the traditional light bulb design wasn’t sufficient. For one, …read more

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How To Make A Pilotron, The Forgotten Tube

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The vacuum tube is largely ignored in modern electronic design, save for a few audio applications such as guitar and headphone amps. The transistor is smaller, cheaper, and inordinately easier to manufacture. By comparison, showing us just how much goes into the manufacture of a tube, [glasslinger] decided to make a wire-element pilotron – from scratch!

To say this is an involved build is an understatement. Simply creating the glass tube itself takes significant time and skill. [glasslinger] shows off the skills of a master, however – steadily working through the initial construction, before showing off advanced techniques necessary to …read more

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