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5 May 2001, 11:31 (Ref:89253)
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#26 | ||
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Rookie
Join Date: Apr 2001
Posts: 27
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Magneticlly operated valves use a solenoid to open and close the valve, and don't use any kind of camshaft like in a conventional engine. I can imagine they do have huge advantages in that valve opening could be continuiously varied for different rev ranges/power loads etc (much like an engine map for the fuel injection) and can have much more aggressive opening/closing velocities due to not being limited by the cam. Power usage of the solenoids is obviously a big issue, but then I imagine you gain most/all(?) of this power back from the engine by not having to run a cam in the first place.
Chris |
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5 May 2001, 22:48 (Ref:89446)
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#27 | ||
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Veteran
Join Date: Nov 1999
Posts: 1,101
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Have a look at this thread for some info and pics:
Electrohydraulic Valve Actuation Last edited by Dino IV; 5 May 2001 at 22:58. |
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5 May 2001, 23:06 (Ref:89460)
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#28 | ||
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Veteran
Join Date: Nov 1999
Posts: 1,101
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That link doesn't work does it?
 Too bad, but no worries I dug the thread up and it's in the Tech Forum main view again. |
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7 May 2001, 20:13 (Ref:89958)
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#29 | |
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Rookie
Join Date: Sep 2000
Posts: 20
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BMW's new engine got variable valve-lift, it's not operated by solenoids or hydraulic pressure but cam-driven.
It will be in the 316 in June or July I believe, and not in the M because it doesn't operate well at revs >6000 rpm. |
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7 May 2001, 20:34 (Ref:89965)
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#30 | |
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Rookie
Join Date: Sep 2000
Posts: 20
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I just did some research and here's what BMW has to say:
http://www.bmw.com/e46_2/de/2_techno..._motor316.html |
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