"Berang" (berang)
12/10/2015 at 00:21 • Filed to: engines
7
5|
"Berang" (berang)
12/10/2015 at 00:21 • Filed to: engines | 7
| 5 |
Literally. One. Single. Overhead cam.
The single cam operates both intake and exhaust valves through roller rocker arms - pretty clever stuff in 1901! Most cars still used atmospherically operated intake valves at this time. There are actually two lobes on the cam (although it is difficult to see), but since it is a single piece, I’m still considering it a single cam.
Technically speaking the Oldsmobile has a sideshaft, since the camshaft runs along the side of the engine. This was a common arrangement for early single cylinder engines, a multiple cylinder engine would require each cylinder to have its own sideshaft, so it’s easy to see why this mechanism disappeared.
Watch the full video from the Fountainhead Museum in Alaska:
Snuze: Needs another Swede
> Berang
12/10/2015 at 08:31 |
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Holy crap, that’s amazing!
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Berang
> Snuze: Needs another Swede
12/10/2015 at 08:47 |
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I think my favorite bit of this arrangement is how the intake valve passes through the exhaust rocker.
BigBlock440
> Berang
12/10/2015 at 09:47 |
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Is the gif upside-down? That doesn’t look over-head in the gif.
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Berang
> BigBlock440
12/10/2015 at 09:50 |
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underhead cam
or maybe it’s a sidehead cam like subarus have.
Axial
> Berang
12/10/2015 at 23:42 |
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Everybody likes to say OHV is a dinosaur and OHC is the future, but the truth is that OHC is the older of the two. :D