[urq] NAC: Oil level in an oil pan

[Martin pajak]

Yes, this used to be the case.
The crank was used to "splash" the bottom of the pistons to lubricate the
wrist pins.
In most of the new engines this is not necessary because of the oil
squirters.
Also oil in any form (including mist) causes drag on the crank, not large
but noticable (cause for knife edging of cranks for racing applications
etc.)
While back crank touching oil was the "normal" thing.

HTH
Martin Pajak

http://www.quattro.ca

1983 Audi Ur-quattro (305,000 km) for sale : (
1985 Audi Ur-quattro (210,000 km) Euro spec. import mit 3B ;o)
1971 Porsche 911T (45,000 mi) all original



-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com]On
Behalf Of Schaible, David
Sent: 18-Aug-04 16:48
To: Ingo D. Rautenberg; quattro at audifans.com; urq at audifans.com;
Louis-Alain_Richard at computerhorizons.com
Cc: Denis_Joncas at computerhorizons.com
Subject: RE: [urq] NAC: Oil level in an oil pan


How come on small engine like a lawnmower the crank will engage the
oil??

David Schaible




JRS Pharma LP
2981 Rte 22
Patterson, NY 12563
845.878.3414

ALL STATEMENTS IN THIS CORRESPONDENCE ARE CONFIDENTIAL UNLESS OTHERWISE
NOTED


-----Original Message-----
From: Ingo D. Rautenberg [mailto:ingo at waratap.com]
Sent: Wednesday, August 18, 2004 4:03 PM
To: quattro at audifans.com; urq at audifans.com;
Louis-Alain_Richard at computerhorizons.com
Cc: Denis_Joncas at computerhorizons.com
Subject: Re: [urq] NAC: Oil level in an oil pan

Should not happen.  That's why cars nowadays have windage trays.  Don't
want
oil starvation or oil foaming.  And if the crank is moving at any rate
and
oil level is such that it's touching, it will foam the oil.  Not good.
That's why you're not supposed to overfill the oil!

----- Original Message -----
From: <Louis-Alain_Richard at computerhorizons.com>
To: <quattro at audifans.com>; <urq at audifans.com>
Cc: <Denis_Joncas at computerhorizons.com>
Sent: Wednesday, August 18, 2004 3:19 PM
Subject: [urq] NAC: Oil level in an oil pan


> Total NAC but automotive content.
>
> Here at work, we are creating flash animations to train mechanics.
Now, we
> are working on the bottom-end module, including oil circuit, water
> cooling, etc.
>
> In one animation, the computer graphics designer drew an engine seen
from
> the rear main seal, where we can see the oil level, the crankshaft
> rotating, the oil circuit, etc.
>
> My problem: the oil level is right to the middle of the crankshaft.
>
> My suggestion: lower the oil level so no part of the spinning
crankshaft
> will touch the oil surface.
>
> Our problem 1 : the animation is approved by the manufacturer, and
nobody
> saw a problem with the higher oil level.
> Our problem 2 : this animation is the base for many many others, and
would
> need at least 2 weeks of work to correct.
>
> My question :   - In the car world, can I say that no car engine has a
> crankshaft touching the oil surface? If you are a
mechanic-gearhead-car
> guy, would this bother you?
>
> My understanding is that such a setup would create foaming, if not
destroy
> the crankshaft at higher engine speeds.
>
> If somebody want to see one actual animation, I can forward it ( 58kB
).
>
> Thanks in advance,
>
> Louis-Alain
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