Oil cooler control
Oil cooler control
(OP)
I'm trying to come up with a slick (and cheap) way to control oil flow thru/around a cooler on an air-cooled motorcycle.
When the oil temperature reaches, say 190F, I want to gradually switch the flow thru the cooler.
I found a self-contained temperature valve that will close/open with temperature. I could use one in the line from the oil pump to the filter and slowly close it to force oil thru the cooler when it's hot. To keep the cooler out of the loop when cold, I would have to use another (reverse-acting) valve in the cooler line. The problem is that these valves are $132 each. By the time I added the extra plumbing, parts cost would be near $300 ($150 if I used only one valve).
I could also add a temperature switch with a 3-way solenoid valve, but it would not be much cheaper. Besides, I don't like suddenly switching oil flow at 3-8000 RPM.
Does anyone know of a 3-way, self-contained, thermal valve? Know a way to plumb up a carburetor choke control? Anything else that might work?
The oil line is 3/8" (1/4" NPT fittings). Pressure is under 50 PSIG and temperature could reach 250-300F. Heavy vibration and exposed to the elements.
Appreciate any suggestions.
. . . Steve
When the oil temperature reaches, say 190F, I want to gradually switch the flow thru the cooler.
I found a self-contained temperature valve that will close/open with temperature. I could use one in the line from the oil pump to the filter and slowly close it to force oil thru the cooler when it's hot. To keep the cooler out of the loop when cold, I would have to use another (reverse-acting) valve in the cooler line. The problem is that these valves are $132 each. By the time I added the extra plumbing, parts cost would be near $300 ($150 if I used only one valve).
I could also add a temperature switch with a 3-way solenoid valve, but it would not be much cheaper. Besides, I don't like suddenly switching oil flow at 3-8000 RPM.
Does anyone know of a 3-way, self-contained, thermal valve? Know a way to plumb up a carburetor choke control? Anything else that might work?
The oil line is 3/8" (1/4" NPT fittings). Pressure is under 50 PSIG and temperature could reach 250-300F. Heavy vibration and exposed to the elements.
Appreciate any suggestions.
. . . Steve





RE: Oil cooler control
Or a radiator thermostat (by the way your oil sounds too cool, I'd expect to see >212)
Or a memory metal valve?
Cheers
Greg Locock
RE: Oil cooler control
A radiator thermostat is too large, unless you know of a small one.
What's a "memory metal valve"?
Thanks for the response,
. . . Steve
RE: Oil cooler control
I used them 20 years ago on air cooled VW's.
They were made by the same company that made the oil coolers used by BMC on MGB's and Mini Coopers. As it was about 20 to 30 years ago, I have forgotten the name, but I am sure you could find it by Google
Regards
pat
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RE: Oil cooler control
Look at this site. I have used their products in an industrial application with out fail. They do have temperature/pressure activated valves but not in the size or temp. range you have stated. Of course my catalog is outdated. You'll see their into racing too! and thats a good thing for you.
www.thermaldynamics.com
Good luck
pennpoint
RE: Oil cooler control
http://www.holley.com/HiOctn/ProdLine/Products/EPP/EPPOCC/BltOilTherm.html
RE: Oil cooler control
Follow this link for some info. I have dealt with this compmny with good results, some of their stuff is fitted to my 850cc trials car. They manufacture and distribute MOCAL products and are very well respected in UK.
http://www.thinkauto.com/oilstats.htm
Hope it helps.
PW
RE: Oil cooler control
RE: Oil cooler control
RE: Oil cooler control
Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.