Variable Valve Control

VVC (Variable Valve Control) is an automobile variable valve timing technology developed by Rover and applied to some high performance variants of the company's K Series 1800cc engine.

About

In order to improve the optimisation of the valve timing for differing engine speeds and loads, the system is able to vary the timing and duration of the inlet valve opening. It achieves this by using a complex and finely machined mechanism to drive the inlet camshafts. This mechanism can accelerate and decelerate the rotational speed of the camshaft during different parts of its cycle. e.g. to produce longer opening duration, it slows the rotation during the valve open part of the cycle and speeds it up during the valve closed period.

The system has the advantage that it is continuously variable rather than switching in at a set speed. Its disadvantage is the complexity of the system and corresponding price. Other systems will achieve similar results with less cost and simpler design (electronic control).

For a more detailed description, see the sandsmuseum link below.

Applications

MG Rover cars

Non MG/Rover cars

gollark: But on my internet connection it'd still take 2 hours to copy that off to the interweb.

gollark: I only have something like 60GB of vaguely important data, and 5GB I couldn't replace easily.

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gollark: I don't have anywhere near enough backing up of stuff yet, unfortunately, really ought to work on that.

gollark: I probably get away with doing a lot of stuff weirdly because I have a lot of free time and very little actual demand on my server stuff, since the only user is me. Though I do have a lot of important data and random services.

External links

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