tech: engine balancing - why dont our engines have balancer shafts?

[rapieper@yahoo.com (Ron Pieper)]

IIRC, that technology belonged to Mistubishi, and I assume that they
licensed it, and for some reason VW didn't/couldn't do it.  That's
right off the top of my head...facts are welcome here...

Ron

> <amalventano1@comcast.net>
> > wrote:
> >
> > >     As the topic states, why dont our engines use balancer
> shafts? To
> > > perfectally balance a 4 cylinder engine, you must eliminate the
> 2nd order
> > > force generated by the pistons unequal opposition (piston near
> bottom
> > > moves less than piston near top - for a given crankshaft
> rotation).
> > > The big reason i am asking this is because our engines dont seem
> all too
> > > vibration prone as compared to an engine that employs a balancing
> shaft
> > > (i.e. the 2.0 DSM engines).     Now before some of you try to
> think up a
> > > way to add balancing shafts to our engines, realize that to
> eliminate the
> > > 2nd order force, a balancing shaft must rotate at twice the speed
> of the
> > > crank.
> > >     Another wrench to throw in the works is that the balancer on
> my talon
> > > was 1:1 driven from the crank, but had internal gearing such that
> the
> > > balancer spun at half the speed (i.e. just like the cams).
> > >
> > > Allyn Malventano, ETC(SS), USN
> > > 87 Rieger GTO Scirocco 16v (daily driver, 170k, rocco #6)
> > > 86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
> > > 87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles,
> original
> > > clutch, driveshafts, wheels :)
> > >
> > >
> > >
> > > _______________________________________________
> > > Scirocco-l mailing list
> > > Scirocco-l@scirocco.org
> > > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> >
> >
> >
> 
> 
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