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Anströmkörper
Mutmaßung
Aug 17, 2017 10:39
6 yrs ago
3 viewers *
German term

kurzgeschlossen

German to English Tech/Engineering Automotive / Cars & Trucks
Hi guys,

Just struggling to get a picture of what's going on here:

"Über ein Thermostat wurde der Ölkreislauf unterhalb von 80° C kurzgeschlossen und der Aluminium-Ölkühler umgangen."

kurzgeschlossen/kurzschließen -> often translated as 'bypassed' or 'short-circuited' etc.

Any help appreciated!

Thanks,

Gavin
Proposed translations (English)
3 +2 redirected into a shorter circuit
5 +1 by-passed
4 A thermostat shuts off the flow/circulation of oil ...

Discussion

Johannes Gleim Aug 23, 2017:
What says my special dictionary? bypass (1) mot (gen) - Bypass, m; (2) (mot.brake) -> relief valve; (3) mot.eng.2s) - Nebenschluss, m
bypass vt (techn.gen) - umgehen, vt
bypass filter (mot.eng). partial flow filter - Nebenstromfilter, m (with this type of filtering system, only part of the total lubricant, approx. 10-20%, is routed through the ~ ...)
by-pass valve (mot.charg) (supercharger; in exhaust line or air intake duct) -> blow-off valve
bypass valve (1) (tech.gen) - Umleitventil, n; Bypass-Ventil, n
bypass valve (2) (mot.charg) (in exhaust line of turbocharger system) -> wastegate
(Schmitt, Fachwörterbuch der Kfz-Technik)
Björn Vrooman Aug 21, 2017:
@herbalchemist Thanks. BTW, surprise, surprise, there's a Wiki link on car radiators [the "bypass flow" in the preceding sentence is OK because it's a noun modifier]:
"Engine coolant is directed by the thermostat to the inlet of the circulating pump and is returned directly to the engine, bypassing the radiator."
https://en.wikipedia.org/wiki/Radiator_(engine_cooling)

I think your "redirect" or my alternative, "reroute," works well.

"Sounds like someone was trying to 'verb' a noun."
It's not great in German, but it works better than in English. I suggested to think of it as "hot-wire" because that is basically what's happening and why Lancashireman's statement still stands:
"'the Ölkreislauf (oil circulation) was bypassed', which is clearly nonsense"

In other words: If you hot-wire a car (read: oil circuit), you're bypassing the ignition system (read: cooling unit). You're not bypassing the car--well, you better be doing that if it's mine!

Best wishes
Herbmione Granger Aug 21, 2017:
@Björn I meant to address this, too: 'I used to watch a lot of Star Trek and all they ever did was "bypassing" something, but they bypassed affected systems, not circuits, loops or such.'
Another wise person once referenced Star Trek: (see discussion>pit vs. cavity) http://www.proz.com/kudoz/french_to_english/nuclear_eng_sci/...
I absolutely agree with your statement. Even in Electronics, which I studied in Uni, components and systems are bypassed. A current or circuit cannot be bypassed; it can be divided, redirected, etc. http://www.williamson-labs.com/480_byp.htm http://www.gmtuners.com/fiero/transbypass.htm
Components to create a bypass (Kurzschluss) can be added during construction, but the source text is clearly describing the operation. Also, I have not seen any 'kurzschließen' that means 'to bypass'. Sounds like someone was trying to 'verb' a noun. The 'kurzgeschlossen' here is probably simply 'enclosed in a shorter circuit' (what is made when a car is hot-wired). So, in plain English: When under 80 deg, the oil circulating is cycled in a circuit that does not include the aluminum oil cooler.
Herbmione Granger Aug 19, 2017:
@Björn Thanks for clearing that up. I don't know why more people haven't like my answer :)
Björn Vrooman Aug 19, 2017:
@herbalchemist "I was wondering why you didn't like my answer"
- Where did I say this? I didn't. My bit about "second one" referred to your patent example, nothing more. Otherwise, I wouldn't have said: "This is basically what I posted in the discussion box."

Best
Herbmione Granger Aug 19, 2017:
@Björn I was wondering why you didn't like my answer... I have not been talking about a separate "loop." When the path to the Alu cooler is closed off, the oil still flows, just in a shorter circuit (the fast track). Repost: http://www.flat4.de/oelkreis.htm
Björn Vrooman Aug 19, 2017:
@herbalchemist Don't go to patent claims for something that needs to make sense to mere mortals. I used to work in a patent department.

That said, I think what you're describing is what they do here for HVACs:
http://www.goodmanmfg.com/resources/faq/hvac-101/what-is-two...

This is "two-stage cooling" and there are indeed two "loops."
Herbmione Granger Aug 19, 2017:
I was waiting for someone to bring up "aluminium/aluminum." Also, pretentious Chemistry students say "aluminium" :)
I want to believe you, but https://www.google.com/patents/US6677751 says:
"16. The apparatus of claim 1, wherein one of said first and said second coolant loops cools the NMR receiver resonator and an other one of said first and said second cooling loops performs no substantial cooling function.
17. The apparatus of claim 16, further comprising a second probe short-circuit disposed between said second probe feed and said second probe return for short-circuiting said second coolant loop in said probe head.
18. The apparatus of claim 1, wherein said cooling device comprises a two-step cryo-cooler having a first heat exchanger for said first coolant loop and a second heat exchanger for said second coolant loop.
head."
Bruker is a big deal international NMR machine manufacturer.
Björn Vrooman Aug 19, 2017:
@herbalchemist I think the second one is off; it's one of the main reasons why "bypass" doesn't work.

I used to watch a lot of Star Trek and all they ever did was "bypassing" something, but they bypassed affected systems, not circuits, loops or such. That makes no sense or may imply there's a second, entirely separate "circuit" installed for precisely that reason. That may be an emergency fail safe, but it isn't called a "bypass."

In this context, there really isn't a second "loop" anyway. It's just a "hot-wired" connection, as you might say with cars. You could use "reroute" instead of "redirected":

Oil at temperatures below 80 °C is rerouted by the thermostat, bypassing the aluminum cooler.

Side notes
It's "aluminium" in BrE; Celsius spacing as per NIST guidelines, but others may apply.
Herbmione Granger Aug 19, 2017:
This is also not bad English: "A coolant circuit of this type is described in German Patent Document DE 37 18 697 A1. In this overall coolant circuit, a main circuit and a short circuit are constructed. The main and short circuits are switched as a function of the operating temperature of the coolant by a thermostatic valve. The short circuit is switched below a given opening temperature of the thermostatic valve, that is, during a cold start and a warm-up phase of the internal-combustion engine." https://www.google.it/patents/US5836269
Herbmione Granger Aug 19, 2017:
Re: What is meant Thanks for the links, Björn. I was not clear on how the thermostat/valve works.
This is a more idiomatic English construct: "Bypass mode: When the coolant inlet temperature is less than 85°C (185°F) the circulating thermostat is closed. The coolant circulates in the engine and coolant can flow through the vehicle heating system."
(PDF) https://ddcsn-ddc.freightliner.com/cps/rde/xbcr/ddcsn/4103-1...
Björn Vrooman Aug 18, 2017:
This is what is meant... Includes a helpful diagram:
http://www.flat4.de/oelkreis.htm

Quote:
"Wenn das Öl jedoch noch kalt ist, dann baut sich ein höherer Druck (geringe Ölviskosität) vor dem Öldruckventil (3) auf, so daß der Regelkolben gegen die Federkraft gedrückt wird und das Öl direkt ohne über den Kühler zu fließen an die Schmierstellen gelangen kann."

There's nothing wrong with the German, though; "kurzschließen" means "kürzerer Kreislauf" here (which is not "bypass") and "umgangen" is bypass.

For comparison:
"When an engine is started, a fluid control thermostat will allow only enough oil to pass through the cooler to keep it flowing and avoid cold oil shock. [...] As engine temperatures rise, the fluid control thermostat continues to open until full flow is achieved, usually around 180 degrees F."
http://www.hotrod.com/articles/tips-installing-engine-oil-co...

"What the thermostat does is keep the oil cooler closed, and out of the loop, so that oil can be quickly brought up to temperature. Then the cooler is variably opened to maintain proper oil temperatures."
https://www.enginebasics.com/Engine Basics Root Folder/oil c...

All in all, "kurzgeschlossen" is redundant.
Herbmione Granger Aug 18, 2017:
bypassed There seems to be confusion on what bypassing is. It does not mean 'passed by'. More like 'flowing past' (ignoring). When under 80 degrees, the circulating oil bypasses the cooling unit. When over 80 deg or similar, it passes through the cooling unit. https://www.collinsdictionary.com/dictionary/english/bypass
Lancashireman Aug 18, 2017:
So it should read like this? "The standard oil circuit (>radiator) was by-passed by the thermostat below a temperature of 80 °C and the oil radiator has been circumvented"
Johannes Gleim Aug 18, 2017:
@ Gavin I wonder what term has been used for "umgangen". I would use "circumvent" or similar.

E.g. "The standard oil circuit was (or is) by-passed by the thermostat below a temperature of 80 °C and the oil radiator (oil cooler) has been (or is) circumvented".

Note: Even the German text implies "bypassing the circuit", this isn’t correct. Only the radiator is by-passed. So you may replace "oil circuit" by "radiator" as well.
Lancashireman Aug 18, 2017:
Alexander Schleber & Translator Heike You appear to have endorsed: "the Ölkreislauf (oil circulation) was bypassed", which is clearly nonsense. Hard to tell, however, as Herr Gleim has not proposed a translation as such.
Lancashireman Aug 18, 2017:
skip/bypass http://www.proz.com/kudoz/german_to_english/automotive_cars_...
Alexander Schleber (X) Aug 17, 2017:
JC Cantrell He is absolutely right - I missed the Ölkreislauf.
jccantrell Aug 17, 2017:
bypass As you are talking about the oil circuit, I suggest you use bypass. Short circuits, in my experience, come up regarding electrical systems and, while the meaning is the same in the broad sense, I would still advocate for bypass.

Proposed translations

+2
5 hrs
Selected

redirected into a shorter circuit

The oil cooling system probably has a temperature-responsive bypass valve. The path to the aluminum cooler is closed off when not needed.
https://www.google.com/patents/US3913831


--------------------------------------------------
Note added at 7 hrs (2017-08-17 18:10:12 GMT)
--------------------------------------------------

Perhaps, 'When the temp. of the circulating oil falls under 80, the thermostat is activated, the oil is redirected, and the Alu oil cooler is bypassed.'

--------------------------------------------------
Note added at 21 hrs (2017-08-18 07:57:31 GMT)
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Perhaps 'the thermostat is triggered', as suggested by Lancashireman, is better.
A literal translation will not work. kurzgeschlossen = short-closed; umgangen = bypassed

--------------------------------------------------
Note added at 1 day4 mins (2017-08-18 10:43:10 GMT)
--------------------------------------------------

If you use 'shorted' or 'short-circuited', I would know what is meant (switched to path of least resistance). However, I don't recommend using it in this context.
Compare https://www.google.com/patents/DE19946371C1?cl=de
with https://www.google.com/patents/US6677751
Also, see how a German describes the 'thermostatic valve': http://www.freepatentsonline.com/6584941.html

--------------------------------------------------
Note added at 1 day23 hrs (2017-08-19 09:39:51 GMT)
--------------------------------------------------

If you can stray from the text, maybe use the language from here: 'Coolant circuit of an internal-combustion engine' https://www.google.it/patents/US5836269
Note from asker:
Thanks guys
Peer comment(s):
agree Kim Metzger
1 day 7 hrs
agree Lancashireman : with Kim
1 day 8 hrs
disagree Johannes Gleim : This is no "shorter circuit", but a Bypass, Überströmleitung or Nebenschluss in German. BTW, you considered other circumscriptions as well. It is unclear, what are you proposing at the end.
1 day 14 hrs
agree Björn Vrooman : Cancelling out the unwarranted disagree. This is basically what I posted in the discussion box. I've even included a diagram to illustrate, so I don't know how this is still a matter of debate. I'd say omit it because this is bad style, even in German.
1 day 16 hrs
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Thanks guys"
7 hrs
German term (edited): Über ein Thermostat wurde der Ölkreislauf ... kurzgeschlossen

A thermostat shuts off the flow/circulation of oil ...

https://www.google.co.uk/search?q="thermostat shuts off the ...

Über ein Thermostat wurde der Ölkreislauf unterhalb von 80° C kurzgeschlossen und der Aluminium-Ölkühler umgangen
At a temperature of under 80°C, a thermostat shuts off the flow of oil and the aluminium cooler is bypassed.

Definitely not short-circuit, for the electrifying reason stated by jccantrell. In fact, best not to mention circuit of any kind (=circulation).

'wurde' (past tense) presumably because this is how it was designed/constructed, but present tense in EN because it refers to continuing functionality.
Peer comment(s):
neutral Herbmione Granger : I don't think that's what's going on. More of a figurative 'short circuit'. //So sad :( Thanks, though.//The T drop signals the thermostat to switch the valve.//Yes. I would rather have a different sentence to start :)
40 mins
Sadly, they don't do 'figurative' in technical texts. I like your updated version, though. // However, "the thermostat is activated" implies that it plays a passive role whereas it is actually the controller. // 'triggers' might work.
Something went wrong...
+1
11 hrs

by-passed

Mit jccantrell

Bei einem elektrischen Kurzschluss wird der Verbraucher mit hohem Widerstand durch eine leitende Verbindung mit sehr niedrigem Widerstand überbrückt und die Generatorspannung treibt einen extrem hohen Strom durch die Zuleitungen, der diese in kurzer Zeit zerstört, wenn der Kurzschlussstrom nicht durch Sicherungen oder Schutzschalter unterbrochen wird.

Andererseits beim Ölkreislauf. Wenn der Motor noch kalt ist, braucht er nicht gekühlt zu werden. Erst oberhalb von 80 °C muss er durch den Kühler gekühlt werden. Dann öffnet das Thermostatventil, der Bypass ist unterbochen und das Öl fließt stattdessen durch den Kühler. Da in diesem Fall der Ölstrom konstatiert bleibt, sind Schäden wie bei einem Kurzschluss völlig ausgeschlossen. Deshalb sollte man den Bypass auch Bypass nennen und nicht Kurzschuss.

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Note added at 1 day2 hrs (2017-08-18 13:00:59 GMT)
--------------------------------------------------

Statt "by-passed" kann man auch "bypassed" sagen. Der Gebrauch ist von Land zu Land unterschiedlich. Manche bevorzugen den Bindestrich, weil dies klarer aussieht, andere meiden ihn und schreiben entweder zusammen oder in zwei Wörtern:

bypass auch: by-pass die Überströmleitung
http://dict.leo.org/englisch-deutsch/Bypass

by-passed by history {adj} {past-p} [postpos.] von der Geschichte übergangen
http://www.dict.cc/?s=by-passed

Fachgebiet Mechanische Industrie, Geowissenschaften
en
Definition a pipe for conveying a fluid around an item of a system
Terminus by-pass
Zuverlässigkeit 3 (Zuverlässig)
de
Terminus Bypass
Zuverlässigkeit 3 (Zuverlässig)
Terminus Umgehungsleitung
Zuverlässigkeit 3 (Zuverlässig)
http://iate.europa.eu/SearchByQuery.do?method=searchDetail&l...

Fachgebiet Chemische Verbindung
en
Terminus by-pass
Zuverlässigkeit 3 (Zuverlässig)
Quelle Eur.Fed.of Chemical Engineering
Anmerkung distillation
de
Terminus By-pass
Zuverlässigkeit 3 (Zuverlässig)
Terminus Umleitung
Zuverlässigkeit 3 (Zuverlässig)
Terminus Nebenschluss
Zuverlässigkeit 3 (Zuverlässig)
http://iate.europa.eu/SearchByQuery.do?method=searchDetail&l...

Fachgebiet Mechanische Industrie
Anmerkung engine fuelling:diesel feed
en
Terminus by-pass
Zuverlässigkeit 3 (Zuverlässig)
de
Terminus Überströmleitung
Zuverlässigkeit 3 (Zuverlässig)
http://iate.europa.eu/SearchByQuery.do?method=searchDetail&l...

A harvester according to Claim 3 characterised in that the discharge end (16) is adjustable to an extreme position in which there is no contact with the rollers (22) of the roller separator (25), which is effectively by-passed.
Erntemaschine nach Anspruch 3, dadurch gekennzeichnet, daß das Entladeende (16) in einer Extremposition eingestellt werden kann, bei der keinerlei Kontakt mit den Rollen (22) des Rollenseparators (25) besteht, der vollkommen umgangen wird.

This means that changing the default queue Acces Control List to restrict who can view queue properties or security will be effectively by-passed by the Message Queuing Service.
Dies bedeutet, dass die Zugriffssteuerungsliste der Standardwarteschlange, die das Einsehen der Warteschlangeneigenschaften oder -sicherheit einschränkt, verändert wird, so dass sie vom Message Queuing-Dienst umgangen wird.
http://context.reverso.net/übersetzung/englisch-deutsch/effe...

by-passed………..see definition of by-passed
circumvent
ignore
neglect
omit
sidestep
skirt
burke
circumnavigate
detour
finesse
outflank
blink at
depart from
deviate from
get around
go around
go around the barn
let go
pass aroundr
take back road
wink at
http://www.thesaurus.com/browse/by-passed

PowerVault MD3200i disk by-passed
http://en.community.dell.com/support-forums/storage/f/1216/t...

Is it possible to write the word by-pass with the hyphen, or is it considered wrong?
According to Dictionary.com it's optional.

Answers:

I certainly wouldn't consider it wrong.

I would write it with a hyphen, but I´m old (49).

Without a hyphen looks weird to me. E-mail also looked weird to me till I got used to it.

Two American dictionaries, Random House Unabridged, and American Heritage, have by-pass as the listed headword, with the unhyphenated form given as a valid alternate. Cambridge Advanced Learners and WR's own Princeton Word-net do not show the hyphenated form at all.
https://forum.wordreference.com/threads/bypass-vs-by-pass.17...

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Note added at 1 day3 hrs (2017-08-18 14:17:41 GMT)
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Anmerkung zur Thermotatfunktion:
Wenn der Thermostat im Bypass (in der Umgehungsleitung) eingebaut ist, muss er bei 80 °C Temperatur schließen (nicht öffnen, wie man aus meinem ersten Beitrag herauslesen könnte).
Wenn er vor dem Kühler eingebaut ist, muss er öffnen. Vermutlich macht er beides gleichzeitig. Öffnet den Weg durch den Kühler und sperrt den Bypass ab.

Historische Kühlwasserthermostate im Kraftfahrzeug enthielten ein Bimetall, heutige Thermostate werden dagegen durch eine im Kühlmittelstrom liegende Kapsel betätigt, die mit einem so genannten Dehnstoff (einem Wachs) gefüllt ist.
https://de.wikipedia.org/wiki/Bimetall

Im Innern haben die Mischthermostate einen Regler, der vom Mischwasser umspült wird. Der Regler besteht entweder aus Bimetalldraht, der zu einer schraubenförmigen Feder gewickelt wurde, oder einer paraffingefüllten Kapsel, einem sogenannten Wachsdehnstoff-Element. Beide Reglerarten führen bei Temperaturänderungen proportionale Längenänderungen aus, wobei die Ausführung mit Bimetalldraht größere Regelwege beschreiben kann. Ändern sich die Zuflussbedingungen (Temperatur, Menge), so verschiebt sich der Regler und öffnet beziehungsweise schließt Schlitze der Warm- und Kaltwasserzulaufleitungen.
In der Regel befinden sich sowohl im Kalt- wie auch im Warmwasserzulauf Rückflussverhinderer, um einen hydraulischen Kurzschluss zwischen Kalt- und Warmwassernetz zu vermeiden, durch den die beiden Netze in der Thermostatmischarmatur ansonsten verbunden wären.[3]
https://de.wikipedia.org/wiki/Thermostatventil

insatzthermostate sind einzelne Bauteile, die in einem Gehäuse Thermostatuntergebracht sind. Diese regeln die Kühlmitteltemperatur exakt, sind robust, wartungsfrei und bewähren sich seit Jahrzehnten. Gehäusethermostate bestehen aus dem Einsatz und dem Gehäuse. Diese Module werden voll in den Motor integriert.
Das Herzstück des Wachsthermostates ist das Arbeitselement. Dabei handelt es sich um ein druckfestes Gehäuse. Dieses ist mit einem speziellen Wachs gefüllt. Nach dem Starten des Motors erwärmt die Kühlflüssigkeit das Arbeitselement. Ab einer vorgegebenen Temperatur verflüssigt sich das Wachs im Arbeitselement. Dabei dehnt sich das Wachs aus und drückt in dem Gehäuse auf einen Stift, der als Arbeitskolben dient.
Der Arbeitskolben wird nun aus dem Gehäuse gepresst und öffnet den Kühlmitteldurchfluss zum Kühler über ein Tellerventil. So wird der Motor im optimalen Temperaturbereich gehalten. Unterschreitet das Kühlmittel die vorgegebene Öffnungstemperatur wieder, werden Teller und Stift von einer Feder zurück in die Ausgangsposition gedrückt. Dadurch wird der Kühlmitteldurchfluss zum Kühler unterbrochen.
http://www.mein-autolexikon.de/heizungklima/thermostat.html

Bei zu geringer Motortemperatur nach dem Start oder zu geringer Belastung während der Fahrt wird der Thermostat als 2/2-Wegeventil im Kühlmittelkreislauf gebraucht. Er lässt das aus dem Motor ausströmende Kühlmittel nicht durch den Kühler, sondern direkt über eine Kurzschlussleitung wieder zum Motor zurückfließen. Ein Dehnstoffelement im Innern des Thermostaten wird immer von ausströmendem Kühlmittel umflossen und verschiebt bei Überschreitung der eingestellten Temperatur im Prinzip die beiden Ventilteller. Unten am Motor entsteht eine Mischung aus Kurzschluss- und Kühlerflüssigkeit. Erst wenn nur noch heiße Flüssigkeit oben ankommt, öffnet der Thermostat dauerhaft. Er verhindert so plötzliche Abkühlung eines oder mehrerer Zylinder.
Das zweite Bild zeigt das komplette Thermostatgehäuse mit zugehörigem Thermostaten. Es wird häufig zusammen mit Temperaturfühlern und zusätzlichen Anschlüssen (z.B. für die Heizung) zu einem Modul zusammengefasst. Bild 3 zeigt den Thermostaten in seinem Gehäuse.
Die Öffnungstemperatur von Thermostaten wird für das jeweilige Kühlsystem bestimmt. Lagen diese früher eher bei 80°C, so werden heute (2006) 90°C und mehr erreicht. Es gibt auch Motoren mit einem weiteren Kühlkreislauf innen unmittelbar an den Zylindern. Dieser wird durch die gleiche Pumpe angetrieben, hat aber einen zweiten Thermostaten, der erst bei Temperaturen über 100°C öffnet. Dadurch wird hier das Kühlmittel erst umgepumpt, wenn der optimale Betriebspunkt (schneller als sonst) erreicht ist.
http://www.kfz-tech.de/Biblio/Kuehlung/Thermostat.htm

Wie aus den Zeichnungen ersichtlich, weicht dieser Thermostat von den
üblichen Systemen ab und vermeidet die bei den Schieber-Thermostaten
auftretenden Fehlerquellen durch Verkanten und Hängenbleiben des Schiebers
im Zylinder.
Bei geöffnetem Kegelventil (Abb.1) drückt das Öl über beide Zuleitungen
gleichzeitig zum Kühler. Druck und Gegendruck heben sich hierbei auf und
durch den Druckausgleich wird der Ölfluss durch den Kühler gestoppt. Der
Kühler wird also neutralisiert und das Öl fließt innerhalb des Thermostaten zum
Motor zurück.
Ab ca. 75° Celsius beginnt das Kegelventil zu schließen und unterbricht diesen
Stillstand. Bei ca. 80° ist das Kegelventil geschlossen (Abb.2) und das Öl muss
jetzt über den Kühler zurück zum Motor fließen.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...

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Note added at 1 day23 hrs (2017-08-19 09:47:01 GMT)
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High performance vehicles require large oil coolers to ensure that the oil does not overheat during strenuous use. These coolers also introduce the danger of over-cooling the oil and delaying engine warm-up, resulting in horsepower loss, excessive engine wear and reduced gas mileage. Oil thermostats perform the critical function of bypassing the oil cooler until the oil has reached its minimum operating temperature.
http://www.improvedracing.com/oil-thermostats/high-flow-engi...

Operation
The thermostat bypasses the oil cooler until the fluid reaches the activation temperature. At the activation temperature, the bypass valve begins to close, forcing oil through the cooler and allowing it to cool. If the cooler’s cooling capacity is sufficient, the fluid will tend to stabilize at the rated stabilization temperature.
http://www.improvedracing.com/manuals/FSM-185.pdf

The built-in thermostat prevents oil flow to the cooler until the engine oil reaches activating temperature, allowing for both a faster warmup at startup and extra oil system protection in cold climates.
http://www.mishimoto.eu/mishimoto-thermostatic-oil-sandwich-...

oil thermostat. Empi packaged. Mounts in-line and by-passes oil cooler until oil warms up to approximately 175 degrees. Always partially open to avoid over pressurizing.
https://www.doghouserepair.com/store/item/575/33-5010-oil-co...

The next link illustrates the mounting of the thermostat and the different oil flows regulated by the thermostat:
You should be able to buy a thermostatic valve, a sandwich plate, and a remote oil filter mount.
Then route like so:
https://grassrootsmotorsports.com/forum/tech-tips/oil-cooler...
(Either from sandwich plate via oil thermostat and oil cooler back to oil filter and sandwich plate or from sandwich plate via oil thermostat directly to oil filter and sandwich plate bypassing the oil cooler.

Another circuit scheme is shown under
http://forums.pelicanparts.com/porsche-911-technical-forum/5...
including thermostat/by-pass valve and oil cooler. Two different oil flows under cool and warm conditions controlled by the thermostatic by-pass valve are illustrated as well.

External Oil Cooler By-passed on RAT Type 4
The VW engine, both type 1 and type 4, have a so-called "internal cooler" that sits on top of the engine inside of the fan shroud. The flow of oil through that internal cooler is controlled by pressure valve in the bottom of the case. The temperature is controlled by oil pressure: When the oil is cold it is thicker so the valve by-passes the cooler, when it warms up and gets thinner and the oil pressure drops, the valve begins to route oil through the cooler and that's how it maintains a range of oil temp.
http://www.speedsterowners.com/topic/external-oil-cooler-by-...

Method of modifying engine oil cooling system
US 8505512 B2
:
The by-pass 100 will direct engine oil either to the heat exchanger 15 or, if the temperature or pressure conditions of the oil are within predetermined by-pass parameters, the oil will be by-passed around the heat exchanger 15 via line 130 to line 32.
https://www.google.ch/patents/US8505512

Engine oil cooler
US 8375917 B1
:
Accordingly, if engine oil is below a predetermined temperature or if a predetermined pressure differential exists between the inlet and outlet of oil 15 exceeding the setting of control valve 122, oil will be by-passed through by-pass 100 allowing the system oil temperature and pressure to build to acceptable levels due to engine operation. This typically may take 4 or 5 seconds after start up. The by-pass 100 lessens stress and wear on engine components due to oil conditions which reduce the effectiveness of the lubrication.
http://www.google.com/patents/US8375917

Another drawback in current art oil coolers and diverter apparatus is that, as equal amounts of oil are diverted to the oil cooler and by-passed back to the reservoir, the relatively excessive amount of oil pumped through the oil cooler at cold startup extends the period of time required for reaching the recommended operating temperature of the oil.
https://www.google.si/patents/US6955150

Hope this reference material is sufficient und understand the thermostatic valve function.
Peer comment(s):
agree Alexander Schleber (X)
9 hrs
Danke!
agree Heike Holthaus
12 hrs
Thank you very much!
disagree Lancashireman : All of this was discussed four hours prior to your arrival. If you translate 'kurzgeschlossen' as 'bypassed', what are you proposing that Gavin should do with 'umgangen'? And why the hy-phen?
13 hrs
1) No definite proposal was given. 2) For "umgangen" Gavin can choose form the lists of synonyms for "by-passed" added to my proposal. 3) The hyphen is useful as it originates from "passed by".
neutral Herbmione Granger : 'der Bypass ist unterb[r]ochen'? Ein Bypass ist eine Überbrückung. duden.de/rechtschreibung/Bypass Es gibt im Text kein Bypass und keine Zerstörung.
15 hrs
Natürlich muss der Thermostatschalter den Bypass (den Nebenschluss) schließen, damit das Öl den Weg über den Kühler nimmt, der wegen der geringen Querschnitte (um eine große Oberfläche zu haben) einen höheren Widerstand aufweist.
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