From: "Leon Heller"
Subject: Re: How to detect low oil level
Date: Wed, 30 Oct 2002 14:07:46 -0000
NNTP-Posting-Date: 30 Oct 2002 18:13:19 GMT
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"Jeroen" wrote in message
> "Leon Heller" wrote in message
> > "Jeroen" wrote in message
> > news:LTBv9.422$I6.firstname.lastname@example.org...
> > > Hi,
> > >
> > > what's a simple but reliable way to detect a low oil level of a car?
> > > Something that's easy to place from the outside, without any
> > of
> > > the pan?
> > How about measuring the oil temperature (whilst the engine is running,
> > course). This would rise when the oil level drops. It's probably easier
> > measuring the level.
> I thought about that too, but I want to see it before the engine warms up.
> So that won't work, unless I use a local heater, and measure differences
> temperature (that principle also seems to work as a flowmeter).
> Maybe I can do a capacitance measurement, then I only have to insert two
> probes into the pan at the right level (which is a problem on itself).
> I already took a look in the patents database (http://ep.espacenet.com),
> there you can find a lot of solutions to problems, 80% of all techical
> knowledge seems to reside in patents.
If you just want an indication when the engine isn't running, how about an
IR emitter and sensor on the dipstick. Detect the increase in IR
transmission when the oil level drops.
Leon Heller, G1HSM