A tale of the unexpected

"Cé hé sin" (michael-m-mouse) 05/26/2016 at 18:21 • Filed to: DKW, V4

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This is a DKW V4 two stroke.

Yes, there is something unexpected about it.

HammerheadFistpunch > Cé hé sin 05/26/2016 at 18:22

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Double expansion?

Out, but with a W - has found the answer > Cé hé sin 05/26/2016 at 18:25

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My thought process: Huh? -> Huh, 6 cylinders? -> Huh, two smaller pistons? -> Off to the Googles! -> Ah, charging pump. -> Huh, charging pump?

Cé hé sin > Out, but with a W - has found the answer 05/26/2016 at 18:31

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Twin charge pumps in fact

Cé hé sin > HammerheadFistpunch 05/26/2016 at 18:35

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Charge pumps used for scavenging the other four cylinders. Instead of taking in air below the cylinders and transferring it above the piston it was blown in by the two charge pistons.

Out, but with a W - has found the answer > Cé hé sin 05/26/2016 at 18:35

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Haha, found the same page while googling the thing. Amazing to see what they came up with in those first decades of the automobile.

Honeybunchesofgoats > Cé hé sin 05/26/2016 at 18:36

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I thought it was kind of unexpected that it has a sloth paw coming out of the back, personally.

HammerheadFistpunch > Cé hé sin 05/26/2016 at 18:39

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neat. Haven’t seen that before.

Berang > Cé hé sin 05/26/2016 at 18:42

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how about this one?

Bluecold > Cé hé sin 05/27/2016 at 16:33

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Man that is so logical and wierd at the same time. It’s logical because if you’re going to lop off two strokes from a fourstroke, you need to leave them somewhere. So put the other two strokes on separate cilinders.

On the other hand, if you’re actually going that route, just make a damn four stroke.