DE2931307A1 - Radiator fan for large IC engine - has thermostatically controlled infinitely variable speed drive for fine temperature control - Google Patents

Radiator fan for large IC engine - has thermostatically controlled infinitely variable speed drive for fine temperature control

Info

Publication number
DE2931307A1
DE2931307A1 DE19792931307 DE2931307A DE2931307A1 DE 2931307 A1 DE2931307 A1 DE 2931307A1 DE 19792931307 DE19792931307 DE 19792931307 DE 2931307 A DE2931307 A DE 2931307A DE 2931307 A1 DE2931307 A1 DE 2931307A1
Authority
DE
Germany
Prior art keywords
cooling fan
engine
coolant temperature
coolant
temperature
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
DE19792931307
Other languages
German (de)
Inventor
Faust Dipl Ing Hagin
Erich Knirsch
Johann Dr Ing Pausenberger
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.)
MAN Truck and Bus SE
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
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 MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Priority to DE19792931307 priority Critical patent/DE2931307A1/en
Publication of DE2931307A1 publication Critical patent/DE2931307A1/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
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/046—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using mechanical drives

Abstract

The engine has a cooling water radiator (7) with a fan (1) blowing air over it. The fan is connected by an electromagnetic clutch (2) to the output side of an infinitely variable speed drive (3,4,5). The engine crankshaft (6) is connected to the input side of the drive. The drive ratio is varied by a positioner (9) which is controlled by a thermostat (8) in the cooling water flow. At the optimum temp. the fan runs at the mean available speed. Above this temp. it runs faster, and below it, it runs slower. This maintains the cooling water temp. within a narrow band at all engine operating conditions.

Description

Geregelter Kühllüfterantrieb an Brennkraft- Regulated cooling fan drive on the internal combustion

maschinen, insbesondere für schwere Kraftfahrzeuge, Triebwagen oder Lokomotiven Die Erfindung betrifft einen geregelten Kühllüfterantrieb an Brennkraftmaschinen, insbesondere für schwere Kraftfahrzeuge, Triebwagen oder Lokomotiven. machines, especially for heavy vehicles, railcars or Locomotives The invention relates to a regulated cooling fan drive on internal combustion engines, especially for heavy vehicles, railcars or locomotives.

Derartige bekannte, mit einem Stufenschaltgetriebe versehene Antriebe ergeben im allgemeinen große Kühlmitteltemperaturschwankungen, was für den Motor einen über einen jeweils relativ langen Zeitraum anhaltenden Betrieb mit einer vom Bestwert abweichenden Betriebstemperatur bedeutet. Weiter wird für den größeren Teil der Betriebszeit wesentlich mehr Kühllüfterantriebsleistung verbraucht und Geräusch erzeugt, als eigentlich nötig wäre. Schließlich haben sich die mechanischen Schaltstöße als recht schädlich für den Betrieb und die Haltbarkeit erwiesen.Such known drives provided with a stepped gearbox generally result in large coolant temperature fluctuations, which is important for the engine an operation that lasts for a relatively long period of time with one from Best value means deviating operating temperature. Next will be for the bigger one Part of the operating time consumes significantly more cooling fan drive power and Generates noise than is actually necessary. Finally, the mechanical Shift surges proved quite detrimental to operation and durability.

Erfindungsaufgabe ist, den Kühllufterantrieb so zu verbessern, daß er weich und störungsfrei unter allen Betriebsbedingungen die für den Motor beste Kühlmitteltemperatur mit geringen Schwankungen einhält.The object of the invention is to improve the cooling fan drive so that it is soft and trouble-free under all operating conditions, which is the best for the engine Maintains coolant temperature with minor fluctuations.

Diese Aufgabe wird mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst, während die Ansprüche 2 bis 4 verbessernde Einzelheiten angeben.This task is with the characterizing features of the claim 1 solved, while claims 2 to 4 specify improving details.

Die Erfindung wird anhand der Zeichnung mit einem Ausführungsbeispiel erläutert; dabei zeigt Fig. 1 die erfindungsgemäße Vorrichtung im Schema und Fig. 2 ein Betriebsdiagramm.The invention is based on the drawing with an exemplary embodiment explained; FIG. 1 shows the device according to the invention in the scheme and FIG. 2 is an operational diagram.

Gemäß Fig. 1 wird der zum Motorkühler 7 gehörende Kühllüfter 1 mittels einer pneumatisch oder hydraulisch betätigbaren Kupplung oder mittels einer elektromagnetischen Kupplung 2 über ein Übersetzungsgetriebe 3, 4, 5 von der Motorwelle 6 aus angetrieben. Die Ubersetzungsräder 4 und 5 mit dem verbindenden Riemen 3 sind durch einen Kühlmitteltemperaturfühler 8 über eine Stellvorrichtung 9 stufenlos verstellbar; damit ist das Ubersetzungsverhältnis nW,/nL stufenlos änderbar. Und zwar ist die Schaltung so, daß bei der für den Motorbetrieb besten Kühimitteltemperatur von z. B. T = 3580K die mittlere Übersetzung, bei einer um einige, z. B. 50 höheren Kühlmitteltemperatur, also bei z. B. T0 = 3630K, die stärkste Übersetzung ins Schnelle und bei einer um einige, z. B. 50 niedrigeren Kühlmitteltemperatur, also bei z. B. Tu = 3530K, die stärkste Übersetzung ins Langsame eingeschaltet ist; siehe hierzu Fig. 2.According to FIG. 1, the cooling fan 1 belonging to the engine radiator 7 is activated by means of a pneumatically or hydraulically actuated clutch or by means of an electromagnetic one Clutch 2 is driven by a transmission gear 3, 4, 5 from the motor shaft 6. The transmission wheels 4 and 5 with the connecting belt 3 are through a coolant temperature sensor 8 continuously via an adjusting device 9 adjustable; so is the transmission ratio nW, / nL can be changed continuously. And that is the circuit so that at the best coolant temperature for engine operation of z. B. T = 3580K the mean translation, with one to some, z. B. 50 higher coolant temperature, so at z. B. T0 = 3630K, the strongest translation in the fast and with one um some, e.g. B. 50 lower coolant temperature, so at z. B. Tu = 3530K, the strongest translation to slow speed is switched on; see Fig. 2.

Die Kühlanlage ist dabei so bemessen, daß die höchste Kühlmitteltemperatur T0 für den Betrieb mit kleinster Drehzahl und höchster Leistung des Motors, sowie für höchste Außentemperatur und kleinste Fahrgeschwindigkeit und die niedrigste Kühlmitteltemperatur Tu für den Betrieb mit durchschnittlicher Drehzahl und Leistung des Motors, sowie für durchschnittliche Außentemperatur und Fahrgeschwindigkeit eingehalten wird.The cooling system is dimensioned so that the highest coolant temperature T0 for operation with the lowest speed and highest power of the motor, as well as for the highest outside temperature and the lowest driving speed and the lowest Coolant temperature Tu for operation with average speed and power of the engine, as well as the average outside temperature and driving speed is adhered to.

Bei Kühlmitteltemperaturen unterhalb von Tau ist die Kupplung 2 unter dem Einfluß des Temperaturfühlers 8 ausgekuppelt, so daß der Kühl lüfter 1 nicht mehr mechanisch angetrieben wird.At coolant temperatures below Tau, clutch 2 is below the influence of the temperature sensor 8 disengaged so that the cooling fan 1 is not more mechanically driven.

Der gesamte regelbare Kühlmitteltemperaturbereich T0 - Tu entspricht etwa der Hysterese des Rühlmittelkreislaufs.The entire controllable coolant temperature range T0 - Tu corresponds to about the hysteresis of the coolant circuit.

Schließlich ist das Übersetzungsgetriebe 3, 4, 5 nach der Formel 2,2' nDmax/nLmin 4,2 bemessen, wobei nLmax und nLmin die Grenzlüfterdrehzahlen bedeuten.Finally, the transmission gear 3, 4, 5 according to the formula 2.2 ' nDmax / nLmin 4.2, where nLmax and nLmin mean the limit fan speeds.

Claims (4)

Patentansprüche Geregelter Kühilüfterantrieb an Brennkraftmaschinen, insbesondere für schwere Kraftfahrzeuge, Triebwagen und Lokomotiven, gekennzeichnet durch ein stufenloses Ubersetzungsgetriebe (3, 4, 5) für den Antriebs des Kühllüfters (1) von der Motorwelle (6) aus, das durch einen Kühlrnitteltemperaturfühler (8) über eine Stellvorrichtung (9) so schaltbar ist, daß bei der für den Motorbetrieb besten Kühlmitteltemperatur (T) die mittlere Übersetzung, bei einer um einige Grad höheren KUhlmitteltemperatur (To) die stärkste Übersetzung ins Schnelle und bei einer um einige Grad niedrigeren Kühlmitteltemperatur (Tu) die stärkste Übersetzung ins Langsame eingeschaltet ist. Patent claims Regulated cooling fan drive on internal combustion engines, especially for heavy vehicles, railcars and locomotives by a stepless transmission gear (3, 4, 5) for driving the cooling fan (1) from the motor shaft (6), which is determined by a coolant temperature sensor (8) can be switched via an adjusting device (9) so that when the engine is operated best coolant temperature (T) is the mean gear ratio, at a temperature of a few degrees higher coolant temperature (To) the strongest translation into high speed and at a coolant temperature (Tu) that is a few degrees lower is the strongest ratio is turned on slowly. 2. Kühllüfterantrieb nach Anspruch 1, dadurch gekennzeichnet, daß der gesamte regelbare Kühlmitteltemperaturbereich To T Tu etwa der Hysterese des Kühlmittelkreislaufs entspricht. 2. cooling fan drive according to claim 1, characterized in that the entire controllable coolant temperature range To T do about corresponds to the hysteresis of the coolant circuit. 3. Kühllüfterantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Ubersetzungsgetriebe (3, 4, 5) nach der Formel 2,2 G nLmax/nLmin = 4,2 bemessen ist, wobei "Lmax und in die Grenzlüfterdrehzahlen bedeuten.3. cooling fan drive according to claim 1 or 2, characterized in that that the transmission gear (3, 4, 5) dimensioned according to the formula 2.2 G nLmax / nLmin = 4.2 where "Lmax and in mean the limit fan speeds. 4. Kühllüfterantrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen dem Kühllüfter (1) und dem hinteren Übersetzungsrad (5) eine pneumatisch oder hydraulisch betätigbare Kupplung oder eine elektromagnetische Kupplung (2) angeordnet ist, die bei Kühlmitteltemperaturen unterhalb der mittleren Temperatur (T) unter dem Einfluß des Temperaturfühlers (8) ausgekuppelt ist.4. cooling fan drive according to one of claims 1 to 3, characterized in that that between the cooling fan (1) and the rear transmission wheel (5) a pneumatic or hydraulically operated clutch or an electromagnetic clutch (2) is arranged at coolant temperatures below the mean temperature (T) is disengaged under the influence of the temperature sensor (8).
DE19792931307 1979-08-01 1979-08-01 Radiator fan for large IC engine - has thermostatically controlled infinitely variable speed drive for fine temperature control Ceased DE2931307A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792931307 DE2931307A1 (en) 1979-08-01 1979-08-01 Radiator fan for large IC engine - has thermostatically controlled infinitely variable speed drive for fine temperature control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792931307 DE2931307A1 (en) 1979-08-01 1979-08-01 Radiator fan for large IC engine - has thermostatically controlled infinitely variable speed drive for fine temperature control

Publications (1)

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DE2931307A1 true DE2931307A1 (en) 1981-02-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804745A1 (en) * 1988-02-16 1989-08-24 Man Nutzfahrzeuge Gmbh Cooling system for internal combustion engines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120219A (en) * 1934-08-15 1938-06-07 Trisco Products Inc Stocking form and support
US2658400A (en) * 1951-08-01 1953-11-10 Adiel Y Dodge Variable fan drive
US3732831A (en) * 1971-07-12 1973-05-15 Diebold Inc Modular concrete vault structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120219A (en) * 1934-08-15 1938-06-07 Trisco Products Inc Stocking form and support
US2658400A (en) * 1951-08-01 1953-11-10 Adiel Y Dodge Variable fan drive
US3732831A (en) * 1971-07-12 1973-05-15 Diebold Inc Modular concrete vault structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3804745A1 (en) * 1988-02-16 1989-08-24 Man Nutzfahrzeuge Gmbh Cooling system for internal combustion engines

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Legal Events

Date Code Title Description
OAM Search report available
OC Search report available
8127 New person/name/address of the applicant

Owner name: M.A.N. MASCHINENFABRIK AUGSBURG-NUERNBERG AG, 8000

8110 Request for examination paragraph 44
8127 New person/name/address of the applicant

Owner name: M A N NUTZFAHRZEUGE GMBH, 8000 MUENCHEN, DE

8131 Rejection