DE19845009A1 - Rear window heating for motor vehicles - Google Patents
Rear window heating for motor vehiclesInfo
- Publication number
- DE19845009A1 DE19845009A1 DE19845009A DE19845009A DE19845009A1 DE 19845009 A1 DE19845009 A1 DE 19845009A1 DE 19845009 A DE19845009 A DE 19845009A DE 19845009 A DE19845009 A DE 19845009A DE 19845009 A1 DE19845009 A1 DE 19845009A1
- Authority
- DE
- Germany
- Prior art keywords
- rear window
- window heater
- heater according
- electrical power
- controlled
- 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- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 230000007613 environmental effect Effects 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 2
- 239000012080 ambient air Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000005485 electric heating Methods 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0236—Industrial applications for vehicles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/035—Electrical circuits used in resistive heating apparatus
Landscapes
- Window Of Vehicle (AREA)
- Surface Heating Bodies (AREA)
- Resistance Heating (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Die Erfindung betrifft eine Heckscheibenheizung für Kraftfahrzeuge gemäß Oberbegriff des Anspruchs 1.The invention relates to a rear window heater for motor vehicles according to the preamble of Claim 1.
Die Heckscheiben von Kraftfahrzeugen sind üblicherweise mit elektrischen Heizelementen zum Beheizen der Heckscheiben ausgerüstet. Die Heckscheibenheizung eines Kraftfahrzeugs kommt insbesondere in der kalten Jahreszeit zum Einsatz, um die Heckscheibe beschlagfrei zu machen oder sie zu enteisen. Gerade in der kalten Jahreszeit kann aber der Ladezustand der Fahrzeugbatterie kritisch werden, da aufgrund der niedrigen Außentemperaturen und der sonstigen häufiger eingeschalteten elektrischen Verbraucher eine oftmals schlechte Ladebilanz für die Fahrzeugbatterie gegeben ist.The rear windows of motor vehicles are usually equipped with electrical heating elements equipped for heating the rear windows. The rear window heater one Motor vehicle is used in particular in the cold season to the Make the rear window fog-free or defrost them. Especially in the cold season However, the state of charge of the vehicle battery can become critical because of the low Outside temperatures and the other more frequently switched on electrical consumers there is often a poor charge balance for the vehicle battery.
Es sind Maßnahmen bekannt, die bei einem schlechten Ladezustand der Fahrzeugbatterie eine zeitweise Abschaltung von elektrischen Verbrauchern oder in anderer Weise eine Reduzierung der Belastung der Fahrzeugbatterie vorsehen. So wird in der DE 44 22 329 A1 eine Steuerung der Verbraucherlast in Abhängigkeit von der Batteriekapazität und der Generatorleistung vorgeschlagen. Die elektrischen Verbraucher können zu diesem Zweck teilweise abgeschaltet oder nur noch im Impulsbetrieb mit reduzierter Belastung betrieben werden.Measures are known for a poor state of charge of the vehicle battery a temporary shutdown of electrical consumers or in another way Provide a reduction in the load on the vehicle battery. So in DE 44 22 329 A1 a control of the consumer load depending on the battery capacity and the Generator power suggested. The electrical consumers can do this partially switched off or only operated in pulse mode with reduced load become.
Auch aus der DE 39 36 638 C1 ist eine Verbraucherabschaltung in Abhängigkeit vom Ladezustand der Fahrzeugbatterie vorgesehen. Für den Betrieb einer elektrisch beheizbaren Heckscheibe ist in der deutschen Offenlegungsschrift 16 30 963 eine Reduzierung der elektrischen Heizleistung in Abhängigkeit von der Spannung der Stromquelle vorgesehen.From DE 39 36 638 C1, a consumer shutdown is dependent on State of charge of the vehicle battery provided. For the operation of an electrically heated Rear window is a reduction in the German Offenlegungsschrift 16 30 963 electrical heating power depending on the voltage of the power source provided.
Die bekannten Maßnahmen machen die Zu- oder Abschaltung der elektrischen Heizelemente einer Heckscheibenheizung vom Ladezustand der Fahrzeugbatterie bzw. von deren Ladebilanz oder der Generatorleistung abhängig. Eine Berücksichtigung der jeweiligen Betriebssituation des Kraftfahrzeugs ist dabei nicht vorgesehen. The known measures make the electrical connection or disconnection Heating elements of a rear window heater from the state of charge of the vehicle battery or from their charge balance or the generator power. Taking into account the respective The operating situation of the motor vehicle is not provided.
Der Erfindung liegt die Aufgabe zugrunde, eine Heckscheibenheizung für Kraftfahrzeuge mit einer elektrisch beheizbaren Heckscheibe zu schaffen, bei der unter Berücksichtigung der Betriebssituation des Kraftfahrzeugs eine unnötig starke Batteriebelastung bei aktivierter Heckscheibenheizung vermieden werden kann.The invention has for its object to provide a rear window heater for motor vehicles to create an electrically heated rear window, taking into account the Operating situation of the motor vehicle an unnecessarily high battery load when activated Rear window heating can be avoided.
Die Lösung dieser Aufgabe erhält man mit den im Anspruch 1 angegebenen Merkmalen. Die Betriebssituation des Kraftfahrzeugs wird durch Berücksichtigung von Umgebungseinflüssen, wie beispielsweise dem durch die Fahrgeschwindigkeit bedingten Fahrtwind und/oder der Außentemperatur, festgestellt, so daß in Abhängigkeit von der jeweiligen Betriebssituation die den elektrischen Heizelementen zugeführte elektrische Leistung eingestellt werden kann. Bei größerer Fahrgeschwindigkeit kann die elektrische Leistung höher eingestellt werden, um der durch den Fahrtwind bedingten stärkeren Kühlung entgegen zu wirken. Bei höherer Fahrgeschwindigkeit können höhere elektrische Verbraucherleistungen in der Regel problemlos hingenommen werden, da der Generator mit einer entsprechend höheren Generatorleistung in das Bordnetz einspeisen kann. Dabei ist es auch besonders vorteilhaft, daß ein die jeweilige Fahrgeschwindigkeit angebendes Signal in der Bordnetzsteuerung eines Kraftfahrzeugs ohnehin vorhanden ist, so daß die fahrgeschwindigkeitsabhängige Ansteuerung der Heizelemente mit sehr geringem technischen Zusatzaufwand realisierbar ist. Der Fahrtwind kann aber auch anstelle der indirekten Ermittlung aus der Fahrgeschwindigkeit mittels Sensoren gemessen werden.The solution to this problem is obtained with the features specified in claim 1. The Operating situation of the motor vehicle is determined by taking environmental influences into account, such as the headwind caused by the driving speed and / or the Outside temperature, determined so that depending on the particular operating situation the electrical power supplied to the electrical heating elements can be adjusted. At higher driving speeds, the electrical power can be set to to counteract the stronger cooling caused by the wind. At higher Driving speed can usually be higher electrical consumer power can be accepted without any problems since the generator has a correspondingly higher Can feed generator power into the vehicle electrical system. It is also particularly advantageous that a signal indicating the respective driving speed in the vehicle electrical system control of a motor vehicle is present anyway, so that the speed-dependent Control of the heating elements can be implemented with very little additional technical effort is. The airstream can also be used instead of the indirect determination from the Driving speed can be measured using sensors.
Die zum Betrieb der elektrischen Heizelemente verwendete elektrische Leistung kann mit zunehmender Fahrgeschwindigkeit proportional oder entsprechend einer vorgegebenen Kennlinie erhöht oder verändert werden. Die Kennlinie kann dabei empirisch für jeden Fahrzeugtyp und abhängig von unterschiedlichen Außentemperaturen festgelegt werden, so daß ein temperatur- und fahrgeschwindigkeitsabhängiges Kennlinienprofil entsteht. Ein solches Kennlinienprofil kann auch weitere Parameter, die die jeweilige Betriebs- und Umgebungssituation des Kraftfahrzeugs spezifizieren, berücksichtigen. Solche weiteren Parameter können beispielsweise die Innentemperatur des Kraftfahrzeugs, die Luftfeuchtigkeit, Zeitangaben, etc. sein.The electrical power used to operate the electrical heating elements can also be used increasing driving speed proportional or according to a predetermined Characteristic curve can be increased or changed. The characteristic curve can be empirical for everyone Vehicle type and depending on different outside temperatures can be determined, so that a temperature and driving speed-dependent characteristic profile profile is created. On Such a characteristic profile can also include other parameters that determine the respective operating and Specify and take into account the environmental situation of the motor vehicle. Such others Parameters can include, for example, the interior temperature of the motor vehicle Humidity, times, etc.
Die Heckscheibenheizung kann an der Heckscheibe mehrere einzeln oder gemeinsam ansteuerbare Heizelemente aufweisen, um der jeweiligen Betriebssituation entsprechend eine Anpassung der Heizleistung vornehmen zu können.The rear window heater can be used individually or together on the rear window have controllable heating elements in order to suit the respective operating situation to be able to adjust the heating output.
Eine Anpassung der elektrischen Leistung kann auch durch eine gepulste Ansteuerung der Heizelemente mit einem veränderbaren Tastverhältnis erfolgen. The electrical power can also be adjusted by pulsed control of the Heating elements with a variable duty cycle.
Die Erfindung wird nachfolgend anhand der Zeichnung, die ein Blockschaltbild der Heizeinrichtung darstellt, näher erläutert.The invention is described below with reference to the drawing, which is a block diagram of the Represents heating device, explained in more detail.
Die Heizelemente 1 einer hier nicht dargestellten Heckscheibe eines Kraftfahrzeugs sind an eine steuerbare Schalteinrichtung 2 angeschlossen, deren Steuereingang mit dem Ausgang einer Steuereinrichtung 3 verbunden ist. An der Schalteinrichtung 2 liegt außerdem die Bordnetzspannung UB an, die über die Schalteinrichtung 2 in einer von der Steuereinrichtung 3 bestimmten Weise an die Heizelemente 1 angelegt werden kann. Die Steuereinrichtung 3 erhält eingangsseitig Informationen über die aktuelle Fahrgeschwindigkeit v des Kraftfahrzeugs sowie über weitere Parameter P, welche die aktuelle Betriebssituation und/oder Umgebungseinflüsse spezifizieren. Diese Parameter P und auch die Fahrgeschwindigkeit v können von der Steuereinrichtung 3 anhand eines in einem Speicher 4 abgelegten fahrzeugspezifischen Kennfelds zur Steuerung der Heizelemente 1 verwendet werden. Die Steuerung 3 der Heckscheibenheizung kann zu diesem Zweck Kenndaten aus dem Speicher 4 in Abhängigkeit von den anliegenden Werten für die Fahrgeschwindigkeit v und bezüglich der weiteren Parameter P entnehmen.The heating elements 1 of a rear window, not shown here, of a motor vehicle are connected to a controllable switching device 2 , the control input of which is connected to the output of a control device 3 . The vehicle electrical system voltage U B also is applied to the switching device 2, which can be applied via the switching device 2 in a manner determined by the control device 3. manner to the heating elements. 1 On the input side, the control device 3 receives information about the current driving speed v of the motor vehicle and about further parameters P which specify the current operating situation and / or environmental influences. These parameters P and also the driving speed v can be used by the control device 3 on the basis of a vehicle-specific characteristic diagram stored in a memory 4 for controlling the heating elements 1 . For this purpose, the control unit 3 of the rear window heater can extract characteristic data from the memory 4 as a function of the applied values for the driving speed v and with regard to the further parameters P.
Die Schalteinrichtung 2 ermöglicht es, einzelne Heizelemente 1 der Heckscheibe separat anzusteuern oder sämtliche Heizelemente 1 gemeinsam anzusteuern. Dabei können die Heizelemente 1 gepulst betrieben werden, wobei die Steuereinrichtung 3 das Tastverhältnis des Pulsbetriebs verändern kann. Auf diese Weise läßt sich in Abhängigkeit von den aktuellen Umgebungseinflüssen und sonstigen Betriebsdaten eine gewünschte Heckscheibenheizleistung exakt einstellen. The switching device 2 enables individual heating elements 1 of the rear window to be controlled separately or all heating elements 1 to be controlled together. The heating elements 1 can be operated in a pulsed manner, the control device 3 being able to change the pulse duty factor of the pulse operation. In this way, a desired rear window heating output can be set precisely depending on the current environmental influences and other operating data.
11
Heizelemente
Heating elements
22nd
Schalteinrichtung
Switching device
33rd
Steuereinrichtung
Control device
44th
Speicher
P Parameter
UB Storage
P parameters
U B
Bordnetzspannung
v Fahrgeschwindigkeit
Vehicle electrical system voltage
v Driving speed
Claims (10)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19845009A DE19845009A1 (en) | 1998-09-30 | 1998-09-30 | Rear window heating for motor vehicles |
| AT99116820T ATE348495T1 (en) | 1998-09-30 | 1999-09-01 | WINDOW HEATER FOR MOTOR VEHICLES |
| EP99116820A EP0991301B1 (en) | 1998-09-30 | 1999-09-01 | Window heating device for vehicles |
| DE59914053T DE59914053D1 (en) | 1998-09-30 | 1999-09-01 | Window heating for motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19845009A DE19845009A1 (en) | 1998-09-30 | 1998-09-30 | Rear window heating for motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19845009A1 true DE19845009A1 (en) | 2000-04-06 |
Family
ID=7882904
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19845009A Withdrawn DE19845009A1 (en) | 1998-09-30 | 1998-09-30 | Rear window heating for motor vehicles |
| DE59914053T Expired - Lifetime DE59914053D1 (en) | 1998-09-30 | 1999-09-01 | Window heating for motor vehicles |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE59914053T Expired - Lifetime DE59914053D1 (en) | 1998-09-30 | 1999-09-01 | Window heating for motor vehicles |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0991301B1 (en) |
| AT (1) | ATE348495T1 (en) |
| DE (2) | DE19845009A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10058434C2 (en) * | 2000-11-24 | 2003-12-04 | Audi Ag | Method and device for controlling the heating of an exterior mirror |
| DE10042563B4 (en) * | 2000-08-30 | 2005-06-16 | Audi Ag | Method and device for controlling the heating of an exterior mirror |
| DE102005029411A1 (en) * | 2005-06-24 | 2007-01-04 | Audi Ag | Device and method for operating a sensor arrangement in a motor vehicle |
| DE102010020311A1 (en) * | 2010-05-12 | 2011-11-17 | Audi Ag | Method for controlling heated car component i.e. outside mirror of motor car, involves controlling temperature function of heating system based on detecting external temperature of heating system and predetermined curve of heating power |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004534686A (en) * | 2001-07-09 | 2004-11-18 | シェフェネイカー・ヴィジョン・システムズ・オーストラリア・プロプライアタリー・リミテッド | Mirror heater |
| US8084716B2 (en) * | 2007-06-15 | 2011-12-27 | The Raymond Corporation | Heated glass guard with sensorless control for forklift trucks |
| WO2016027184A1 (en) * | 2014-08-22 | 2016-02-25 | Bombardier Inc. | Apparatus and method for controlled heating of a vehicle window |
| US12129013B2 (en) * | 2018-06-06 | 2024-10-29 | Embraer S.A. | Aircraft window heating system with regulated DC voltage |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1630963A1 (en) * | 1967-12-20 | 1971-06-16 | Porsche Kg | Arrangement for the operation of electrical consumers in motor vehicles |
| DE3936638C1 (en) * | 1989-11-03 | 1991-03-14 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Ensuring electrical power supply in motor vehicle - grouping electrical appliances according to their importance for safety of vehicle |
| DE4214603A1 (en) * | 1992-05-04 | 1993-11-11 | Priesemuth W | Controlled starter switch unit for vehicle electric devices - switches on second switch simultaneously with timed switch which stays active until voltage supply interrupt. |
| DE4422329A1 (en) * | 1993-07-12 | 1995-01-19 | Volkswagen Ag | Method and device for operating an electrical system of an electrical vehicle |
| DE3509073C2 (en) * | 1984-03-24 | 1995-04-20 | Volkswagen Ag | Electric heating, in particular for motor vehicles |
| EP0674251A1 (en) * | 1994-03-22 | 1995-09-27 | FIAT AUTO S.p.A. | An automatic device for reducing the electrical energy-consumption of a heated rear window |
| DE19705416C1 (en) * | 1997-02-13 | 1998-03-26 | Daimler Benz Ag | Controlling heating of vehicle rear screen, with switching off after preset duration |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277672A (en) * | 1979-12-03 | 1981-07-07 | General Electric Company | Control circuit for controlling quantity of heat to electrically heatable windshield |
| US4357524A (en) * | 1980-01-29 | 1982-11-02 | Westinghouse Electric Corp. | Electrical heater controller for aircraft window heat control |
| DE3215802A1 (en) * | 1982-04-28 | 1983-11-03 | Bayerische Motoren Werke AG, 8000 München | SWITCHING ARRANGEMENT FOR A ELECTRICAL ADDITIONAL HEATING IN MOTOR VEHICLES |
| JP3169655B2 (en) * | 1991-11-27 | 2001-05-28 | 本田技研工業株式会社 | Air conditioning system for vehicles |
| US5496989A (en) * | 1994-05-05 | 1996-03-05 | United Technology Corporation | Windshield temperature control system |
| US5632917A (en) * | 1994-08-08 | 1997-05-27 | Ford Motor Company | Electric windshield defroster |
| GB9418477D0 (en) * | 1994-09-14 | 1994-11-02 | Glaverbel | A heated glazing panel and a control circuit for use therewith |
-
1998
- 1998-09-30 DE DE19845009A patent/DE19845009A1/en not_active Withdrawn
-
1999
- 1999-09-01 EP EP99116820A patent/EP0991301B1/en not_active Expired - Lifetime
- 1999-09-01 AT AT99116820T patent/ATE348495T1/en not_active IP Right Cessation
- 1999-09-01 DE DE59914053T patent/DE59914053D1/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1630963A1 (en) * | 1967-12-20 | 1971-06-16 | Porsche Kg | Arrangement for the operation of electrical consumers in motor vehicles |
| DE3509073C2 (en) * | 1984-03-24 | 1995-04-20 | Volkswagen Ag | Electric heating, in particular for motor vehicles |
| DE3936638C1 (en) * | 1989-11-03 | 1991-03-14 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | Ensuring electrical power supply in motor vehicle - grouping electrical appliances according to their importance for safety of vehicle |
| DE4214603A1 (en) * | 1992-05-04 | 1993-11-11 | Priesemuth W | Controlled starter switch unit for vehicle electric devices - switches on second switch simultaneously with timed switch which stays active until voltage supply interrupt. |
| DE4422329A1 (en) * | 1993-07-12 | 1995-01-19 | Volkswagen Ag | Method and device for operating an electrical system of an electrical vehicle |
| EP0674251A1 (en) * | 1994-03-22 | 1995-09-27 | FIAT AUTO S.p.A. | An automatic device for reducing the electrical energy-consumption of a heated rear window |
| DE19705416C1 (en) * | 1997-02-13 | 1998-03-26 | Daimler Benz Ag | Controlling heating of vehicle rear screen, with switching off after preset duration |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10042563B4 (en) * | 2000-08-30 | 2005-06-16 | Audi Ag | Method and device for controlling the heating of an exterior mirror |
| DE10058434C2 (en) * | 2000-11-24 | 2003-12-04 | Audi Ag | Method and device for controlling the heating of an exterior mirror |
| DE102005029411A1 (en) * | 2005-06-24 | 2007-01-04 | Audi Ag | Device and method for operating a sensor arrangement in a motor vehicle |
| DE102010020311A1 (en) * | 2010-05-12 | 2011-11-17 | Audi Ag | Method for controlling heated car component i.e. outside mirror of motor car, involves controlling temperature function of heating system based on detecting external temperature of heating system and predetermined curve of heating power |
| DE102010020311B4 (en) * | 2010-05-12 | 2021-02-11 | Audi Ag | Method for controlling a motor vehicle component of a motor vehicle that can be heated by means of a heating system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0991301A1 (en) | 2000-04-05 |
| EP0991301B1 (en) | 2006-12-13 |
| DE59914053D1 (en) | 2007-01-25 |
| ATE348495T1 (en) | 2007-01-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8110 | Request for examination paragraph 44 | ||
| 8130 | Withdrawal |