DE19642114A1 - Coolant circuit safety valve with hot stop valve - Google Patents

Coolant circuit safety valve with hot stop valve

Info

Publication number
DE19642114A1
DE19642114A1 DE1996142114 DE19642114A DE19642114A1 DE 19642114 A1 DE19642114 A1 DE 19642114A1 DE 1996142114 DE1996142114 DE 1996142114 DE 19642114 A DE19642114 A DE 19642114A DE 19642114 A1 DE19642114 A1 DE 19642114A1
Authority
DE
Germany
Prior art keywords
valve
kpa
hot stop
hot
float
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE1996142114
Other languages
German (de)
Inventor
Guenter Kuhlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1996142114 priority Critical patent/DE19642114A1/en
Publication of DE19642114A1 publication Critical patent/DE19642114A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/18—Indicating devices; Other safety devices concerning coolant pressure, coolant flow, or liquid-coolant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0238—Closure caps with overpressure valves or vent valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/22—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point
    • F01P3/2207—Liquid cooling characterised by evaporation and condensation of coolant in closed cycles; characterised by the coolant reaching higher temperatures than normal atmospheric boiling-point characterised by the coolant reaching temperatures higher than the normal atmospheric boiling point

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)

Abstract

The safety valve has a second hot stop valve (11) on the compression side. This valve has a float (10), or is itself a float. It is lifted as the speculum of the fluid rises and is thus operated. When the vehicle is at rest (garaged or parked), the valve remains closed. When the vehicle is in motion, the valve will open at 140 kPa. In hot stop mode, with a gas bubble in the engine, the fluid speculum rises. The valve stays closed up to 60 kPa. The second hot stop valve opens at above 60 kPa to connect with an excess pressure valve (4).

Description

Die meisten Verbrennungsmotoren führen die Wärme über einen geschlossenen Kühlkreislauf ab.Most internal combustion engines carry the heat over you closed cooling circuit.

Stand der Technik:
Meistens sitzt dieses Ventil auf dem Wasserausgleichsbehälter.State of the art:
Most of the time this valve sits on the water expansion tank.

Beim Erwärmen dehnt sich die Flüssigkeit aus und es entsteht ein Überdruck im Kühlsystem.When heated, the liquid expands and there is an overpressure in the cooling system.

Nach Erreichen eines voreingestellten Druckes, meistens 140 kPa öffnet das Überdruckventil.After reaching a preset pressure, usually 140 kPa, that opens Pressure relief valve.

Fig. 6 zeigt ein derartiges Überdruckventil. Fig. 6 shows such a pressure relief valve.

Durch den Strömungswiderstand entsteht vor dem Kühler ein Druck bis max. 60 kPa.The flow resistance creates a pressure up to max. 60 kPa.

D. h. im Kühlsystem werden Drücke bis 200 kPa erreicht.That is, pressures of up to 200 kPa are reached in the cooling system.

Das ist auch bei den meisten Automobilherstellern die obere Grenze, weil man keine fahrenden Bomben auf den Straßen haben will.This is also the upper limit for most car manufacturers because you don’t want bombs on the streets.

Problematisch ist jedoch der "hot stop" d. h. das Abstellen des Motors im heißen Zustand.However, the "hot stop" d is problematic. H. stopping the engine in the hot condition.

Solange nur Gas ansteht, kann dieses durch das Überdruckventil entweichen.As long as only gas is present, this can be done through the pressure relief valve escape.

Verdampft jedoch Kühlflüssigkeit im Motor, drückt die Gasblase die Flüssigkeit im Ausgleichsbehälter gegen das Ventil und bei einem Überdruck über 140 kPa tritt Kühlflüssigkeit aus.However, if coolant evaporates in the engine, the gas bubble presses it Liquid in the expansion tank against the valve and at an overpressure Coolant leaks above 140 kPa.

Das System ist nicht wartungsfrei.The system is not maintenance-free.

Gelöst wird dieser Mangel jetzt unterschiedlich:
Durch Differentialventile, Flüssigkeitsumwälzpumpen, Nachlaufen des Lüfters u. Überlaufbehälter im "hot stop"-Bereich.This deficiency is now solved differently:
Through differential valves, liquid circulation pumps, fan run-on u. Overflow tank in the "hot stop" area.

Alle vorstehenden Lösungen sind kosten- u. energieaufwendig.All of the above solutions are cost and. energy consuming.

BezugszeichenlisteReference list

1 Schraubkappe
2 Außendichtung
3 Ventilkörper
4 Überdruckventil
5 Unterdruckventil
6 Unterdruckfeder
7 Überdruckfeder
8 Ventildichtung
9 Gewindestutzen-Ausgleichsbehälter
10= Schwimmkörper
11 "hot stop"-Ventil
12 Überdruckventil
13 Ventildichtung
14 hot stop-Ventilkörper 1 screw cap
2 outer seal
3 valve bodies
4 pressure relief valve
5 vacuum valve
6 vacuum spring
7 pressure spring
8 valve seal
9 threaded connector expansion tank
10 = float
11 "hot stop" valve
12 pressure relief valve
13 valve seal
14 hot stop valve body

Claims (12)

Dadurch gekennzeichnet, daß unter das wie in Fig. 6 gezeigte Ventil (Stand der Technik) ein zweites (hot stop) Ventil auf der Druckseite angeordnet wird. Characterized in that a second (hot stop) valve is arranged on the pressure side under the valve (prior art) as shown in FIG. 6. Dieses Ventil hat einen Schwimmkörper oder ist als Schwimmkörper ausgeführt und wird bei ansteigendem Flüssigkeitsspiegel angehoben und in Reihe geschaltet.This valve has a float or is a float executed and is raised when the liquid level rises and in Series connected. Die Fig. 1-5 zeigen diese Lösung. Figs. 1-5 show this solution. Fig. 1 im ruhenden Betrieb (Garage/parken) bleibt das Ventil geschlossen. Fig. 1 in idle operation (garage / parking) the valve remains closed. Fig. 2 im fahrendem Betrieb - öffnet das Ventil - bei 140 kPa. Fig. 2 while driving - opens the valve - at 140 kPa. Fig. 3 im "hot stop"-Betrieb - durch Gasblasen im Motor - steigt der Flüssigkeitsspiegel an - das Ventil bleibt bis 60 kPa geschlossen. Fig. 3 in "hot stop" mode - due to gas bubbles in the engine - the liquid level rises - the valve remains closed up to 60 kPa. Fig. 4 im "hot stop"-Betrieb - öffnet das 2. Ventil (hot stop-Ventil) bei einem Druck über 60 kPa und steht am ersten Überdruckventil an. Fig. 4 in "hot stop" mode - opens the second valve (hot stop valve) at a pressure above 60 kPa and is applied to the first pressure relief valve. Fig. 5 im "hot stop"-Betrieb - ist der Flüssigkeitsspiegel u. Druck weiter angestiegen und das erste Überdruckventil öffnet bei 200 kPa. Fig. 5 in "hot stop" mode - is the liquid level u. Pressure continued to rise and the first pressure relief valve opens at 200 kPa. In Reihe geschaltete Widerstände - hier 60 + 140 = 200 kPa - addieren sich.Resistors connected in series - here 60 + 140 = 200 kPa - add up. In dieser Situation würde Kühlflüssigkeit austreten.In this situation, coolant would leak. Praktische Versuche haben gezeigt,daß dieser Zustand nur bei einem Störfall erreicht wird.Practical tests have shown that this condition occurs only in one Accident is reached. Er dient nur als letztes Sicherheitsglied.It only serves as the last safety link.
DE1996142114 1996-10-14 1996-10-14 Coolant circuit safety valve with hot stop valve Ceased DE19642114A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996142114 DE19642114A1 (en) 1996-10-14 1996-10-14 Coolant circuit safety valve with hot stop valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996142114 DE19642114A1 (en) 1996-10-14 1996-10-14 Coolant circuit safety valve with hot stop valve

Publications (1)

Publication Number Publication Date
DE19642114A1 true DE19642114A1 (en) 1997-03-27

Family

ID=7808556

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996142114 Ceased DE19642114A1 (en) 1996-10-14 1996-10-14 Coolant circuit safety valve with hot stop valve

Country Status (1)

Country Link
DE (1) DE19642114A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815023A1 (en) * 1987-05-29 1988-12-08 Toyoda Gosei Kk CLOSURE WITH A PRESSURE VALVE
EP0177860B1 (en) * 1984-10-06 1989-12-20 Behr GmbH & Co. Device for securing a cooling circuit of an internal-combustion engine
DE4124182C1 (en) * 1991-07-20 1992-06-04 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4220631C1 (en) * 1992-06-24 1993-03-11 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Valve arrangement for cooling circuit of IC engine - has at least two excess pressure valves and switch valve for change of pressure between excess pressure valves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177860B1 (en) * 1984-10-06 1989-12-20 Behr GmbH & Co. Device for securing a cooling circuit of an internal-combustion engine
DE3815023A1 (en) * 1987-05-29 1988-12-08 Toyoda Gosei Kk CLOSURE WITH A PRESSURE VALVE
DE4124182C1 (en) * 1991-07-20 1992-06-04 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4220631C1 (en) * 1992-06-24 1993-03-11 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Valve arrangement for cooling circuit of IC engine - has at least two excess pressure valves and switch valve for change of pressure between excess pressure valves

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licenses declared
8131 Rejection