DE10042525A1 - Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage - Google Patents

Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage

Info

Publication number
DE10042525A1
DE10042525A1 DE2000142525 DE10042525A DE10042525A1 DE 10042525 A1 DE10042525 A1 DE 10042525A1 DE 2000142525 DE2000142525 DE 2000142525 DE 10042525 A DE10042525 A DE 10042525A DE 10042525 A1 DE10042525 A1 DE 10042525A1
Authority
DE
Germany
Prior art keywords
connection
generator
cooling fan
voltage
control
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.)
Withdrawn
Application number
DE2000142525
Other languages
German (de)
Inventor
Josef Winkler
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Priority to DE2000142525 priority Critical patent/DE10042525A1/en
Publication of DE10042525A1 publication Critical patent/DE10042525A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D27/004Control, e.g. regulation, of pumps, pumping installations or systems by varying driving speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/02Controlling of coolant flow the coolant being cooling-air
    • F01P7/04Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/048Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives

Abstract

Such a device has a generator (1) for generating electrical energy, a generator controller (5) assigned to the generator (1) and a temperature sensor (8) for detecting the temperature of the drive device. The electrical generator voltage that can be derived from the generator (1) can be fed to an electromotive cooling fan (7) via a first connection (2). The first connection (2) is followed by a variable resistor (3) followed by a second connection (4) for deriving the vehicle electrical system voltage. The generator controller (5) is also assigned to this second connection (4). A signal from the temperature sensor (8) can cause a change in the value of the variable ohmic resistor (3) and thus in the generator voltage. By changing the generator voltage, it is thus possible to control and / or regulate the electromotive cooling fan (7) in a cost-effective and simple manner with low noise emissions.

Description

The invention relates to such a control device and has a genera gate for generating electrical energy, one assigned to the generator Generator controller and a temperature sensor to record the temperature rature of the drive device. The invention further relates to a method to operate this control device.

It is known the electromotive cooling fan of a drive device device, for example an internal combustion engine of a motor vehicle, via to operate the vehicle electrical system voltage. In the simplest case, the To Drive device assigned a temperature sensor that the temperature of the Internal combustion engine detected. The tempe designed as a thermal switch rature sensor is supplied with the on-board electrical system voltage which it is switched through state via an electrical connection to the electromotive cooling system fan conducts, whose other connection has a ground connection. he if the drive device reaches a predetermined temperature, the switch Temperature sensor the electrical system voltage on the electromotive cooling fan, which thus causes the cooling of the drive device. Often who such electromotive cooling fans a cooler as a heat rope shear assigned in which a cooling medium of the drive device flows.

The disadvantage here is that the electromotive cooling fan then runs in operation at its maximum speed and thus high running noise generated. These high running noises are disadvantageous because they are outside to appear. In order to solve this problem it is known that Temperature sensor with two switching points. With a lower one Temperature, the cooling fan is operated via a series resistor, see above that due to the lower speed then the running noise is reduced are. The electric motor is only activated when an upper temperature is exceeded cooling fan directly with the on-board voltage and thus under full load exaggerated; but then with high running noise.

The object of the invention is therefore an electromotive cooling fan to operate a drive device so that its noise emission is as low as possible with sufficient cooling of the drive device. Fer ner it is an object of the invention to provide a corresponding method.

The object is achieved by the subject matter of the patent award 1 and a method according to claim 5 solved.

The advantage of the invention is that the electrical Ge generator voltage via a first connection to an electromotive Cooling fan can be fed and the first connection via a change a ohmic resistance a second connection to lead off the board mains voltage is connected downstream. Is here due to a signal from Temperature sensor a change in the value of the changeable ohm resistance, the voltage on the first also changes Connection for the operation of the electromotive cooling fan via the signal of the temperature sensor in connection with the generator voltage can be controlled and / or regulated in a simple and cost-effective manner is. The electromotive cooling fan can therefore already at low Operating temperature exceeded at low speed and thus ge ring running noises are operated for cooling.

It is advantageous if the variable ohmic resistance from a row hen and / or parallel connection of ohmic resistors is formed and if the ohmic resistors switching elements to their supply or Shutdown are assigned, the switches depending on the signal are switchable via a control device. The electromotive Kühlven tilator can thus depend on the number of ohmic resistors be switched in stages. The running noise emission is therefore in stages limited according to the required cooling.

A further reduction in running noise emissions depending on the necessary cooling is possible if an even finer gradation or one continuous transition in the control and / or regulation of the speed of the electromotive cooling fan is provided. Then the changeable ohmic resistance as adjustable resistance, for example as a transistor or MOS-FET, whose resistance in Ab dependency of the signal is changeable.  

Further advantages and details of the invention emerge from the following ing description of an embodiment with reference to the drawings gene.

It shows:

Fig. 1 is a schematic diagram of a control device according to the invention,

Fig. 2 shows a control device according to the Fig. 1 peeled in series th ohmic resistors,

Fig. 3 shows a control device according to FIG. 1 with a parallel circuit device of ohmic resistors and

Fig. 4 shows a control device according to FIG. 1 with a controllable or adjustable ohmic resistor.

In the following description of the invention with reference to the figures, the same elements are identified with the same reference numerals. The generator voltage of a generator 1 , which is preferably connected to an operating device, for example an internal combustion engine of a motor vehicle, is connected via a first connection 2 and a variable ohmic resistor 3 to a second connection 4 for deriving the vehicle electrical system voltage. The second terminal 4 is assigned a generator controller 5 , which is connected to the excitation winding 6 of the generator 1 . The on-board electrical system voltage is regulated in a known manner at the second connection 4 via the generator regulator 5 in conjunction with a corresponding activation of the excitation winding 6 , so that it is as constant as possible. From Fig. 1 further shows that the first terminal 2, an electric motor cooling fan 7 is associated, which can thus be operated with the generator voltage. The motor of the electric motor cooling fan 7 can be designed in a known manner as a DC motor, in which case the generator 1 is assigned a rectifier device, not shown. Alternatively, the motor of the electric motor's cooling fan 7 can also be designed as an AC motor, in which case the first connection 2 must be followed by a rectifier device, not shown, if, as usual, the vehicle electrical system voltage is a direct voltage. A temperature sensor 8 is assigned to the variable ohmic resistor 3 and detects the temperature of the drive device. On the basis of the signal from the temperature sensor 8 , a change in the value of the variable ohmic resistor 3 can be effected. For this purpose, the signal of the temperature sensor 8 is preferably fed to a control and / or regulating device 9 , which causes a change in the resistance of the variable ohmic resistor 3 . The control and / or regulating device 9 can be designed so that the resistance of the changeable ohmic resistance is as small as possible below the operating temperature of the drive device, so that the vehicle electrical system voltage is also present at the first connection 2 . So that the electromotori cooling fan 7 , in particular its motor by current supply, the generator 1 is not unnecessarily loaded measures are taken to prevent operation of the motor of the electromotive cooling fan 7 at temperatures below the operating temperature. For example, for this purpose the second connection 10 of the electromotive cooling fan 7 cannot be connected to the reference potential, as shown, but to the vehicle electrical system voltage. Alternatively, however, the generator voltage can also be supplied to the electromotive cooling fan 7 via the first connection 2 and a temperature switch 11 , as is indicated in dashed lines. At or below the operating temperature, the temperature switch 11 , which is assigned to the drive device, is open, so that the electromotive cooling fan 7 is not operated. In this case, the second connection 10 of the cooling fan 7 is then set to the reference potential. Only when the operating temperature is exceeded by a predetermined value is this temperature switch 11 closed, so that the electromotive cooling fan 7 can be operated with the generator voltage. The speed of the cooling fan 7 then depends on the resistance of the variable ohmic Wi resistance 3 , which is controlled or regulated by the signal of the temperature sensor 8 . It is thus possible to operate the electromotive cooling fan 7 when the operating temperature is slightly exceeded at a low speed and thus with low noise emissions. With further increasing temperature of the drive device takes place in steps or continu ously which also increases a change in the value of the variable resistive Wi DERS tandes 3 due to the signal of the temperature sensor 8, the generator voltage at the first terminal 2 in steps or continuously, and thus the electric motor cooling fan 7, the required cooling, higher speed is operated. The vehicle electrical system voltage at the second connection 4 does not change, however, since the generator connection 5 is arranged downstream of the second connection 4 . It is thus possible to operate the cooling fan in a cost-effective and simple manner with low noise emissions and sufficient cooling of the drive device.

The variable ohmic resistor 3 can, according to FIG. 2, be formed from a series connection of ohmic resistors 12 , which can be switched by the ohmic resistors 12 associated with resistance switches 13 . The resistance switches 13 can be controlled accordingly as a function of the signal from the temperature sensor 8 via the control and / or regulating device 9 , so that the generator voltage at the first connection 2 can be changed in stages with the same resistance value of the ohmic resistors 12 . Alternatively, the values of the ohmic resistors 12 can also be different, so that the generator voltage at the first connection 2 can be changed in different stages.

A resistor arrangement according to FIG. 3 has the same effect, the ohmic resistors 12 being connected in parallel. About the ohmic Wi resistors 12 associated resistance switch 13 , the total resistance of the variable ohmic resistor 3 and thus the generator voltage can be changed based on the signal of the temperature sensor 8 via the control and / or regulating device 9 .

From Fig. 4, a particularly convenient and economic Re goes gel means produced according to the invention, wherein the first terminal 2, not only the electric motor cooling fan 7 via the temperature switch 11 and a first switch 14 but also a heating resistor 15 via a second and third switches 16 , 17 and, for example, at least one comfort energy converter 18 are assigned via a fourth and fifth switch 19 , 20 . The first connection 2 is also assigned a high-current energy store 22 via a diode 21 . About the high-current energy storage 22 assigned sixth, seventh and eighth switches 23 , 24 , 25 is the electromotive cooling fan 7 , the heating resistor 15 and / or the comfort energy converter 18, the ge stored in high-current energy storage 22 electrical energy can be supplied. The switches 11 , 14 , 16 , 17 , 19 , 20 , 23 , 24 , 25 can be controlled via the control and / or regulating device 9 . In addition to the signal from the temperature sensor 8 , the control and / or regulating device 9 can also be supplied with a brake signal 26 and / or an acceleration signal 27 and / or an overrun mode signal 28 if the control device according to the invention is used in a motor vehicle. Between the first connection 2 and the second connection 4 , the changeable ohmic resistor 3 is arranged, which is designed as a transistor, as a MOS-FET or as another variable resistor. Depending on the signal of the temperature sensor 8 , a change in the resistance of the variable ohmic resistor 3 and thus the generator voltage at the first connection 2 takes place via the control and / or re gel device 9 . As already explained, the electromotive cooling fan 7 , corresponding to the signal from the temperature sensor 8 , the generator voltage can be supplied via the temperature switch 11 when a predetermined temperature is exceeded. In this case, the power loss generated by the variable ohmic resistance 3 is preferably derived.

Depending on the generator voltage at the first connection 2 , the high-current energy store 22 can also be charged via the diode 21 , but this leads to an additional load on the generator 1 . In order to reduce this load, a ninth switch 29 is preferably provided between the first connection 2 and the diode 21 , which can also be controlled by the control and / or regulating device 9 . This ninth switch 29 is preferably always open when the electromotive cooling fan 7 is in operation. This switch 29 is closed, for example, due to the braking and / or overrun signal 26 , 28 . On the basis of at least one of these signals, the variable ohmic resistor 3 is also controlled via the control and / or regulating device 9 to increase its resistance, so that the highest possible generator voltage is present at the first connection 2 for charging the high-current energy store 22 . The Hochstromenergiespei cher 22 can thus be loaded in phases of low load on the drive device, in particular braking energy can be recovered. In phases of high load, for example when accelerating the motor vehicle, the first switch 14 , the third switch 17 and / or the fifth switch 20 can be opened and the sixth, seventh and / or eighth switches 23 , 24 , 25 can be closed as required in order to supply the electromotive cooling fan 7 , the heating resistor 15 and / or the comfort energy wall 18 with electrical energy from the high-current energy store 22 . This relieves the load on the generator 1 , which has an effect in favor of a good acceleration behavior of the motor vehicle.

If the control and / or regulating device 9 is also supplied with a heating request signal 30 due to which an increase in resistance of the variable ohmic resistor 3 can be effected, then the heat energy that can be derived from the resistor can be passed through a heat exchanger to the coolant circuit 31 of the drive device, for example the internal combustion engine , are fed. It is thus possible, particularly in winter, to quickly heat the drive device to operating temperature. So that the generator 1 is highly resilient, this is also assigned a heat exchanger in which the coolant of the drive device flows.

The second connection 4 , ie the on-board electrical system voltage, is also assigned a battery 32 , a starter motor 33 and low-current converter 34 , for example control devices, which require a voltage that is as constant as possible for operation.

The heating resistor 15 can be, for example, a disk heater, a catalyst heater and / or a passenger compartment heater.

LIST OF REFERENCE NUMBERS

1

generator

2

first connection

3

changeable ohmic resistance

4

second connection

5

regulator

6

excitation winding

7

cooling fan

8th

temperature sensor

9

Control and / or regulating device

10

second connection cooling fan

11

temperature switch

12

ohmic resistance

13

resistance switch

14

first switch

15

heating resistor

16

second switch

17

third switch

18

Comfort energy converter

19

fourth switch

20

fifth switch

21

diode

22

High electrical energy storage

23

sixth switch

24

seventh switch

25

eighth switch

26

brake signal

27

acceleration signal

28

Coasting signal

29

ninth switch

30

Heating demand signal

31

cooling medium

32

battery

33

starter

34

Lower CT

Claims (6)

1. Control device for an electromotive cooling fan ( 7 ) of a drive device,
with a generator ( 1 ) for generating electrical energy,
with a generator controller ( 5 ) assigned to the generator ( 1 ) and
with a temperature sensor ( 8 ) for detecting the temperature of the drive device,
The electrical generator voltage that can be derived from the generator ( 1 ) can be fed to the electromotive cooling fan ( 7 ) via a first connection ( 2 ), the second connection ( 4 ) for deriving the first connection ( 2 ) via a variable ohmic resistor ( 3 ) Vehicle electrical system voltage is connected downstream,
wherein the generator regulator ( 5 ) is assigned to the second connection ( 4 ) and
wherein, based on a signal from the temperature sensor ( 8 ), a change in the value of the variable ohmic resistance ( 3 ) and thus in the generator voltage can be effected to control the electromotive cooling fan ( 7 ).
2. Control device according to claim 1,
the variable ohmic resistor ( 3 ) being formed from a series and / or parallel connection of ohmic resistors ( 12 ),
wherein the ohmic resistors ( 12 ) are associated with resistance switches ( 13 ) for their switching and
the resistance switches ( 13 ) being switchable as a function of the signal via a control and / or regulating device ( 9 ).
3. Control device according to claim 1, wherein the variable ohmic resistor ( 3 ) is listed as a controllable resistor whose resistance can be controlled and / or regulated depending on the signal.
4. Control device according to claim 3, the adjustable resistor as a transistor or MOS-FET is executed.
5. Method for the control and / or regulation of an electromotive cooling fan of a drive device,
wherein a control and / or regulation of the generator voltage of a generator ( 1 ) for generating electrical energy is carried out and / or regulated on the basis of a signal of a temperature sensor ( 8 ) assigned to the drive device
wherein the generator voltage can be fed to the electromotive cooling fan ( 7 ).
6. The method according to claim 5, wherein the control and / or regulation of the generator voltage due to a, caused by the signal change in the resistance of a between a first connection ( 2 ) for deriving the generator voltage, and a second connection ( 4 ) Derivation of the vehicle electrical system voltage, arranged variable ohmic resistance ( 3 ) takes place.
DE2000142525 2000-08-30 2000-08-30 Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage Withdrawn DE10042525A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2000142525 DE10042525A1 (en) 2000-08-30 2000-08-30 Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2000142525 DE10042525A1 (en) 2000-08-30 2000-08-30 Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage

Publications (1)

Publication Number Publication Date
DE10042525A1 true DE10042525A1 (en) 2002-04-04

Family

ID=7654266

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2000142525 Withdrawn DE10042525A1 (en) 2000-08-30 2000-08-30 Control device for cooling fan of drive device driven by electric motor has voltage from generator supplied via first connection to cooling fan plus second connection after first connection on-board voltage

Country Status (1)

Country Link
DE (1) DE10042525A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316696A3 (en) * 2001-11-30 2004-09-15 Audi Ag Control device for a fan and method for operating same
EP2928069A3 (en) * 2014-04-02 2016-01-20 Hamilton Sundstrand Corporation Systems utilizing a controllable voltage AC generator system
DE10350523B4 (en) * 2003-10-29 2016-06-09 Audi Ag On-board network for a motor vehicle and method for operating a vehicle electrical system of a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711392C1 (en) * 1987-04-04 1989-01-12 Behr Thomson Dehnstoffregler Cooling device for an internal combustion engine and method for controlling such a cooling device
DE19532297A1 (en) * 1995-09-01 1997-03-06 Bosch Gmbh Robert A circuit arrangement for supplying power to consumers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3711392C1 (en) * 1987-04-04 1989-01-12 Behr Thomson Dehnstoffregler Cooling device for an internal combustion engine and method for controlling such a cooling device
DE19532297A1 (en) * 1995-09-01 1997-03-06 Bosch Gmbh Robert A circuit arrangement for supplying power to consumers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316696A3 (en) * 2001-11-30 2004-09-15 Audi Ag Control device for a fan and method for operating same
DE10350523B4 (en) * 2003-10-29 2016-06-09 Audi Ag On-board network for a motor vehicle and method for operating a vehicle electrical system of a motor vehicle
EP2928069A3 (en) * 2014-04-02 2016-01-20 Hamilton Sundstrand Corporation Systems utilizing a controllable voltage AC generator system

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