EP1260686B1 - Temperature sensor for an internal combustion engine - Google Patents

Temperature sensor for an internal combustion engine Download PDF

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Publication number
EP1260686B1
EP1260686B1 EP02007544A EP02007544A EP1260686B1 EP 1260686 B1 EP1260686 B1 EP 1260686B1 EP 02007544 A EP02007544 A EP 02007544A EP 02007544 A EP02007544 A EP 02007544A EP 1260686 B1 EP1260686 B1 EP 1260686B1
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EP
European Patent Office
Prior art keywords
bearing structure
temperature detector
detector according
sensor element
temperature
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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.)
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EP02007544A
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German (de)
French (fr)
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EP1260686A3 (en
EP1260686A2 (en
Inventor
Dirk Dr. Jeschke
Robert Albiez
Joachim Kuhn
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • 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
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/13—Ambient temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/50—Temperature using two or more temperature sensors
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0414—Air temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices

Definitions

  • the invention relates to a temperature detection device for an internal combustion engine.
  • Conventional temperature sensing devices typically include sensor elements that enable temperature sensing based on thermodynamic sensing principles such as temperature-induced volume change of a fluid, or based on electrical effects such as changes in line resistance. These sensor elements are connected via electrical lines or thin pipes to a central detection device. Sensor elements for detecting the engine temperature can be arranged in the region of a cylinder head. Sensor elements for detecting the oil temperature are preferably provided in a line section located downstream of an oil pump. Sensor elements for detecting the temperature of the engine intake air can be arranged in an intake tract of the engine before or after a filter device.
  • the US-A-4 085 613 and the GB-A-2 294 762 disclose a support structure having parallel channels connectable to the fluid conduits; In the support structure measuring sensors for the temperature of the parallel currents are provided.
  • the invention has for its object to provide a temperature detecting device, by which at least two in the operation of an internal combustion engine advantageously considered temperature readings can be detected in a favorable manner.
  • This advantageously makes it possible to detect the temperatures of the two air streams centrally by means of a compact and advantageously mountable structural unit, with the measurement signals obtained being coupled with reduced wiring complexity into a harness system provided on the vehicle side.
  • the two sensor elements are preferably combined via the support structure to form a structural unit. This results in particular advantages in terms of assembly technology.
  • the two sensor elements are connected according to the present invention via a common wiring with a vehicle side provided harness load.
  • the two Cabling associated with sensor elements can in this case be connected to the vehicle-side cable harness via a common connection plug structure.
  • the terminal plug structure is advantageously formed integrally with the support structure.
  • the support structure is preferably made of a plastic material and forms a partition, which separates the two air streams at least before their KochstMail the sensor elements from each other.
  • the support structure is preferably formed integrally with an air guide member.
  • This air guide member is preferably an engine intake air guide.
  • the support structure in a fan suspension or a water tank a Fahrzugkühlers.
  • the two sensor elements are preferably arranged adjacent to one another. This results in a particularly compact design.
  • the support structure is advantageously arranged in a region in which a line device of an engine intake air system is guided past a radiator fan.
  • the engine intake air system is preferably coupled to an engine radiator or radiator fan device.
  • FIG. 1 shows a simplified sectional view of a temperature detection device 1 with a first sensor element 2 and a second sensor element 3 wherein the first sensor element 2 is provided for detecting the temperature of an engine intake air flow V1 and the second sensor element 3 for detecting the temperature of a motor cooler ( Fig.2 Reference numeral 9) is provided outflowing radiator air flow V2.
  • the first sensor element 2 and the second sensor element 3 are arranged on a common support structure 4 which is made of a plastic material and attachable via a fastening device 5a, 5b to an air guide device 5c which is flowed through by the engine intake air flow V1.
  • the two sensor elements 2, 3 are formed in this embodiment as PTC sensors, wherein the connecting cable 6 are connectable via a connector device with a vehicle side provided harness load.
  • This connection plug device is preferably formed integrally with the support structure 4
  • an air guide device 7 is provided in this view above the first sensor element 2 through which a partial flow V1 'of the passing engine intake air flow V1 is intensively guided over the first sensor element 2 to the temperature of the intake air reliably to capture.
  • An air guiding device 8 is also provided for the second sensor element 3, through which a partial flow V2 'of the air flowing from a radiator or vehicle heat exchanger and heated by the engine cooling water air flow V2 is intensively guided via the second sensor element 3.
  • the support structure 4 of the temperature detection device 1 in this embodiment comprises a base body 9 made of a plastic material, by means of which a sufficient thermal separation of the two sensor elements 2, 3 is achieved.
  • the measured values for the temperature of the engine intake air and the temperature of the heated air flowing out of the engine radiator, which are generated centrally by the described temperature detection device 1, can be supplied via a single connector to a control device, in particular to an electronic engine management system for performing OBD-relevant functions become.
  • the temperature detection device can also form part of an automatic climate control (AOC sensor).
  • the signals indicative of the temperature of the engine intake air flow generated by the first sensor element 2 and the signals detected via the second sensor element 3 with respect to the temperature of the air flowing out of the engine radiator can be used to optimize the operation of the internal combustion engine and to monitor it ,
  • Fig.2 is shown in the form of a schematic diagram in which way the temperature detection device 1 according to the invention can be arranged in a motor vehicle.
  • the first sensor element 2 and the second sensor element 3 are located behind a cooler 9 in a direction of travel in the direction of travel of the wind.
  • the engine intake air flow V1 leading air guide device 10 is so close to a, overflowed by a radiator air flow V2 led zoom that the temperatures of the engine air and the 9 passed through the radiator - and this heated - air are detected substantially centrally can.
  • the measurement signals generated by the first sensor element 2 and the second sensor element 3 can be forwarded via a connector plug device 11 to a harness load provided on the vehicle side.
  • the connector plug 11 includes a coupling portion formed integrally with the air guide 10.
  • the air guide device 10 is further connected to a suspension device 12 of a radiator fan 13.
  • This suspension device 12 in turn is coupled to the radiator 9.
  • the line devices provided for supplying power to a motor 14 of the blower device 13 via the connection plug 11 to the line system provided on the vehicle side. This results in an even reduced cabling effort.
  • the sensor device 1 is attached to a structural component of the air guiding device 10.
  • the invention is not limited to such an embodiment.
  • the temperature detection device 1 is preferably formed on a structural member associated with the radiator 9.
  • the solution according to the invention makes it possible to form the vehicle radiator, the blower device with its suspension device and the components of the engine intake air guiding device 10 located in the vehicle front area as a preassembled structural unit equipped with the required sensor devices and mounted in an advantageous manner as part of an automated assembly process can be. It is possible to design the connector plug device 11 in such a way that it automatically engages with the connection components provided on the vehicle side as part of the insertion of said assembly into the vehicle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Description

Die Erfindung betrifft eine Temperaturerfassungseinrichtung für eine Brennkraftmaschine.The invention relates to a temperature detection device for an internal combustion engine.

Herkömmliche Temperaturerfassungseinrichtungen umfassen üblicherweise Sensorelemente die auf Grundlage thermodynamischer Messprinzipien wie beispielsweise temperaturbedingter Volumenänderung eines Fluides, oder auf Grundlage elektrischer Effekte wie beispielsweise Änderungen eines Leitungswiderstandes, eine Temperaturerfassung ermöglichen. Diese Sensorelemente sind über elektrische Leitungen oder auch dünne Rohrleitungen an eine zentrale Erfassungseinrichtung angeschlossen. Sensorelemente zur Erfassung der Motortemperatur können im Bereich eines Zylinderkopfes angeordnet sein. Sensorelemente zur Erfassung der Öltemperatur sind vorzugsweise in einem, stromabwärts einer Ölpumpe liegenden Leitungsabschnitt vorgesehen. Sensorelemente zur Erfassung der Temperatur der Motor-Ansaugluft können in einem Ansaugtrakt des Motors vor oder nach einer Filtereinrichtung angeordnet werden.Conventional temperature sensing devices typically include sensor elements that enable temperature sensing based on thermodynamic sensing principles such as temperature-induced volume change of a fluid, or based on electrical effects such as changes in line resistance. These sensor elements are connected via electrical lines or thin pipes to a central detection device. Sensor elements for detecting the engine temperature can be arranged in the region of a cylinder head. Sensor elements for detecting the oil temperature are preferably provided in a line section located downstream of an oil pump. Sensor elements for detecting the temperature of the engine intake air can be arranged in an intake tract of the engine before or after a filter device.

Die US-A-4 085 613 und die GB-A-2 294 762 offenbaren eine Trägerstruktur mit parallelen Kanälen an die Fluidleitungen anschließbar sind ; in der Trägerstruktur sind Mess- Sensoren für die Temperatur der parallelen Ströme vorgesehen.The US-A-4 085 613 and the GB-A-2 294 762 disclose a support structure having parallel channels connectable to the fluid conduits; In the support structure measuring sensors for the temperature of the parallel currents are provided.

Durch die Erfassung der Temperaturen der Ansaugluft, des Kühlwassers, und des Öles ist es möglich, den Betrieb des Motors insbesondere im Hinblick auf die Abgasqualität zu optimieren. Die zahlreichen Sensoren sowie deren Ankoppelung an eine zentrale Motormanagementeinheit erweist sich jedoch unter montagetechnischen Gesichtspunkten als aufwendig.By detecting the temperatures of the intake air, the cooling water, and the oil, it is possible to optimize the operation of the engine, in particular with regard to the exhaust gas quality. However, the numerous sensors and their coupling to a central engine management unit proves to be complicated from an assembly point of view.

Der Erfindung liegt die Aufgabe zugrunde, eine Temperaturerfassungseinrichtung zu schaffen, durch welche wenigstens zwei bei dem Betrieb einer Brennkraftmaschine in vorteilhafter Weise berücksichtigte Temperaturmesswerte auf günstige Weise erfasst werden können.The invention has for its object to provide a temperature detecting device, by which at least two in the operation of an internal combustion engine advantageously considered temperature readings can be detected in a favorable manner.

Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale gemäß Anspruch 1.This object is achieved by the features according to claim 1.

Dadurch wird es auf vorteilhafte Weise möglich durch einen kompakte und vorteilhaft montierbare Baueinheit die Temperaturen der beiden Luftströme zentral zu erfassen, wobei die gewonnenen Messsignale unter vermindertem Verkabelungsaufwand in ein fahrzeugseitig vorgesehenes Kabelbaumsystem eingekoppelt werden. In besonders vorteilhafter Weise wird es möglich, beispielsweise vor einem Motorstart die Funktionsweise der beiden Sensoren gegeneinander zu überprüfen und ggf. eine gemeinsame Eichung der beiden Sensoren vorzunehmen. Aufgrund der örtlichen Nähe der beiden Sensorelemente wird ein besonders aussagefähiger Vergleich der jeweils erfassten Temperaturwerte möglich. Da im Betrieb der Brennkraftmaschine die durch das zweite Sensorelement erfasste Temperatur nicht unter der Temperatur der Ansaugluft liegen kann, ist eine besonders zuverlässige Funktionsprüfung der Temperaturerfassungseinrichtung möglich.This advantageously makes it possible to detect the temperatures of the two air streams centrally by means of a compact and advantageously mountable structural unit, with the measurement signals obtained being coupled with reduced wiring complexity into a harness system provided on the vehicle side. In a particularly advantageous manner, it is possible, for example, before an engine start to check the operation of the two sensors against each other and possibly make a common calibration of the two sensors. Due to the local proximity of the two sensor elements, a particularly meaningful comparison of the respectively detected temperature values becomes possible. Since, during operation of the internal combustion engine, the temperature detected by the second sensor element can not be lower than the temperature of the intake air, a particularly reliable function test of the temperature detection device is possible.

Die beiden Sensorelemente sind vorzugsweise über die Trägerstruktur zu einer Baueinheit zusammengefasst. Hierdurch ergeben sich insbesondere unter montagetechnischen Gesichtspunkten Vorteile.The two sensor elements are preferably combined via the support structure to form a structural unit. This results in particular advantages in terms of assembly technology.

Die beiden Sensorelemente sind gemäß der vorliegenden Erfindung über eine gemeinsame Verkabelung mit einem fahrzeugseitig vorgesehenen Kabelbaumast verbunden. Die den beiden Sensorelementen zugeordnete Verkabelung kann hierbei über eine gemeinsame Anschlusssteckerstruktur mit dem fahrzeugseitigen Kabelbaumast verbunden sein.The two sensor elements are connected according to the present invention via a common wiring with a vehicle side provided harness load. The two Cabling associated with sensor elements can in this case be connected to the vehicle-side cable harness via a common connection plug structure.

Die Anschlusssteckerstruktur ist mit Vorteil integral mit der Trägerstruktur ausgebildet. Die Trägerstruktur ist vorzugsweise aus einem Kunststoffmaterial gefertigt und bildet eine Trennwand, welche die beiden Luftströme zumindest vor deren Überstreifen der Sensorelemente voneinander trennt.The terminal plug structure is advantageously formed integrally with the support structure. The support structure is preferably made of a plastic material and forms a partition, which separates the two air streams at least before their Überstreifen the sensor elements from each other.

Gemäß einem besonderen Aspekt der Erfindung ist die Trägerstruktur vorzugsweise integral mit einem Luftführungsorgan ausgebildet. Bei diesem Luftführungsorgan handelt es sich vorzugsweise um eine Motoransaugluftführung.According to a particular aspect of the invention, the support structure is preferably formed integrally with an air guide member. This air guide member is preferably an engine intake air guide.

Alternativ hierzu ist es auch möglich, die Trägerstruktur in eine Gebläseaufhängung oder einen Wasserkasten eines Fahrzugkühlers zu integrieren. Die beiden Sensorelemente sind vorzugsweise zueinander benachbart angeordnet. Hierdurch ergibt sich ein besonders kompakter Aufbau.Alternatively, it is also possible to integrate the support structure in a fan suspension or a water tank a Fahrzugkühlers. The two sensor elements are preferably arranged adjacent to one another. This results in a particularly compact design.

Die Trägerstruktur ist mit Vorteil in einem Bereich angeordnet, in welchem eine Leitungseinrichtung eines Motoransaugluftsystems an einem Kühlergebläse vorbeigeführt ist. In diesem Bereich ist vorzugsweise das Motoransaugluftsystem mit einem Motorkühler oder einer Kühlergebläseeinrichtung gekoppelt.The support structure is advantageously arranged in a region in which a line device of an engine intake air system is guided past a radiator fan. In this area, the engine intake air system is preferably coupled to an engine radiator or radiator fan device.

Es ist möglich , ein weiteres Sensorelement vorzusehen, das ebenfalls an der Trägerstruktur angebracht ist, zur Erfassung der Kühlwassertemperatur, wobei dieses Sensorelement vorzugsweise ebenfalls über die gemeinsame Verkabelung an den fahrzeugseitigen Kabelbaum angeschlossen ist.It is possible to provide a further sensor element, which is also attached to the support structure, for detecting the cooling water temperature, wherein this sensor element is preferably also connected via the common wiring to the vehicle-side wiring harness.

Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung in Verbindung mit der Zeichnung. Es zeigen:

Fig. 1
eine Schemadarstellung zur Erläuterung eines bevorzugten Grundaufbaues einer erfindungsgemäßen Temperaturerfassungseinrichtung;
Fig. 2
eine Skizze zur Erläuterung einer bevorzugten Einbauposition der erfindungsgemäßen Temperaturerfassungseinrichtung.
Further details of the invention will become apparent from the following description taken in conjunction with the drawings. Show it:
Fig. 1
a schematic representation for explaining a preferred basic structure of a temperature detection device according to the invention;
Fig. 2
a sketch for explaining a preferred installation position of the temperature detection device according to the invention.

Figur 1 zeigt eine vereinfachte Schnittansicht einer Temperaturerfassungseinrichtung 1 mit einem ersten Sensorelement 2 und einem zweiten Sensorelement 3 wobei das erste Sensorelement 2 zur Erfassung der Temperatur eines Motor-Ansaugluftstromes V1 vorgesehen ist und das zweite Sensorelement 3 zur Erfassung der Temperatur des aus einem Motor-Kühler (Fig.2 Bezugszeichen 9) abströmenden Kühler-Luftstromes V2 vorgesehen ist. FIG. 1 shows a simplified sectional view of a temperature detection device 1 with a first sensor element 2 and a second sensor element 3 wherein the first sensor element 2 is provided for detecting the temperature of an engine intake air flow V1 and the second sensor element 3 for detecting the temperature of a motor cooler ( Fig.2 Reference numeral 9) is provided outflowing radiator air flow V2.

Das erste Sensorelement 2 und das zweite Sensorelement 3 sind an einer gemeinsamen Trägerstruktur 4 angeordnet die hier aus einem Kunststoffmaterial gefertigt ist und über eine Befestigungseinrichtung 5a, 5b an einer Luftführungseinrichtung 5c anbringbar ist welche von dem Motor-Ansaugluftstrom V1 durchströmt wird.The first sensor element 2 and the second sensor element 3 are arranged on a common support structure 4 which is made of a plastic material and attachable via a fastening device 5a, 5b to an air guide device 5c which is flowed through by the engine intake air flow V1.

Die beiden Sensorelemente 2, 3 sind bei diesem Ausführungsbeispiel als PTC-Sensoren ausgebildet, wobei deren Anschlusskabel 6 über eine Steckverbindereinrichtung mit einem fahrzeugseitig vorgesehenen Kabelbaumast verbindbar sind. Diese Anschlusssteckereinrichtung ist vorzugsweise integral mit der Trägerstruktur 4 ausgebildetThe two sensor elements 2, 3 are formed in this embodiment as PTC sensors, wherein the connecting cable 6 are connectable via a connector device with a vehicle side provided harness load. This connection plug device is preferably formed integrally with the support structure 4

In einem Abstand von ca. 4 bis 15 mm ist in dieser Ansicht oberhalb des ersten Sensorelementes 2 eine Luftführungseinrichtung 7 vorgesehen durch welche ein Teilstrom V1' des vorbeiströmenden Motor-Ansaugluftstromes V1 intensiv über das erste Sensorelement 2 geführt wird um die Temperatur der Ansaugluft zuverlässig zu erfassen.At a distance of about 4 to 15 mm, an air guide device 7 is provided in this view above the first sensor element 2 through which a partial flow V1 'of the passing engine intake air flow V1 is intensively guided over the first sensor element 2 to the temperature of the intake air reliably to capture.

Auch für das zweite Sensorelement 3 ist eine Luftführungseinrichtung 8 vorgesehen durch welche ein Teilstrom V2'des aus einem Kühler bzw. Fahrzeugwärmetauscher abströmenden und, durch das Motorkühlwasser erwärmten Luftstromes V2 intensiv über das zweite Sensorelement 3 geführt wird.An air guiding device 8 is also provided for the second sensor element 3, through which a partial flow V2 'of the air flowing from a radiator or vehicle heat exchanger and heated by the engine cooling water air flow V2 is intensively guided via the second sensor element 3.

Die Trägerstruktur 4 der Temperaturerfassungseinrichtung 1 umfasst bei diesem Ausführungsbeispiel einen aus einem Kunststoffmaterial gefertigten Basiskörper 9 durch welchen auch eine ausreichende thermische Trennung der beiden Sensorelemente 2, 3 erreicht wird.The support structure 4 of the temperature detection device 1 in this embodiment comprises a base body 9 made of a plastic material, by means of which a sufficient thermal separation of the two sensor elements 2, 3 is achieved.

Die, durch die beschriebene Temperaturerfassungseinrichtung 1 zentral generierten Messwerte für die Temperatur der Motor-Ansaugluft sowie der Temperatur der aus dem Motor-Kühler abströmenden erwärmten Luft, können über einen einzigen Steckverbinder einer Steuereinrichtung insbesondere einem elektronischen Motor- Managementsystem zur Ausführung OBD-relevanter Funktionen zugeführt werden. Die Temperaturerfassungseinrichtung kann auch Teil einer Klimaautomatik (AOC-Sensor) bilden.The measured values for the temperature of the engine intake air and the temperature of the heated air flowing out of the engine radiator, which are generated centrally by the described temperature detection device 1, can be supplied via a single connector to a control device, in particular to an electronic engine management system for performing OBD-relevant functions become. The temperature detection device can also form part of an automatic climate control (AOC sensor).

Die durch das erste Sensorelement 2 generierten, hinsichtlich der Temperatur des Motor-Ansaugluftstromes indikativen Messsignale sowie die über das zweite Sensorelement 3 erfassten, hinsichtlich der Temperatur der aus dem Motorkühler abströmenden Luft indikativen Signale können zur Optimierung des Betriebes der Brennkraftmaschine sowie zur Überwachung derselben herangezogen werden.The signals indicative of the temperature of the engine intake air flow generated by the first sensor element 2 and the signals detected via the second sensor element 3 with respect to the temperature of the air flowing out of the engine radiator can be used to optimize the operation of the internal combustion engine and to monitor it ,

In Fig.2 ist in Form einer Prinzipskizze dargestellt, in welcher Weise die erfindungsgemäße Temperaturerfassungseinrichtung 1 bei einem Kraftfahrzeug angeordnet werden kann. Bei diesem Ausführungsbeispiel befinden sich das erste Sensorelement 2 und das zweite Sensorelement 3 in einem in Fahrtwind-Anströmrichtung gesehen hinter einem Kühler 9 liegenden Bereich. Eine, den Motor-Ansaugluftstrom V1 führende Luftführungseinrichtung 10 ist derart nahe an einen, von einem Kühler-Luftstrom V2 überströmten Ort heran geführt, dass die Temperaturen der Motorluft sowie der durch den Kühler 9 geleiteten - und hierbei erwärmten - Luft im wesentlichen zentral erfasst werden können.In Fig.2 is shown in the form of a schematic diagram in which way the temperature detection device 1 according to the invention can be arranged in a motor vehicle. In this exemplary embodiment, the first sensor element 2 and the second sensor element 3 are located behind a cooler 9 in a direction of travel in the direction of travel of the wind. One, the engine intake air flow V1 leading air guide device 10 is so close to a, overflowed by a radiator air flow V2 led zoom that the temperatures of the engine air and the 9 passed through the radiator - and this heated - air are detected substantially centrally can.

Die durch das erste Sensorelement 2 und das zweite Sensorelement 3 erzeugten Messsignale können über eine Anschlusssteckereinrichtung 11 an einen fahrzeugseitig vorgesehenen Kabelbaumast weitergeleitet werden. Die Anschlusssteckereinrichtung 11 umfasst einen Koppelungsabschnitt der integral mit der Luftführungseinrichtung 10 ausgebildet ist.The measurement signals generated by the first sensor element 2 and the second sensor element 3 can be forwarded via a connector plug device 11 to a harness load provided on the vehicle side. The connector plug 11 includes a coupling portion formed integrally with the air guide 10.

Die Luftführungseinrichtung 10 ist weiterhin mit einer Aufhängungseinrichtung 12 eines Kühlergebläses 13 verbunden. Diese Aufhängungseinrichtung 12 wiederum ist mit dem Kühler 9 gekoppelt. Es ist möglich, auch die zur Spannungsversorgung eines Motors 14 der Gebläseeinrichtung 13 vorgesehenen Leitungseinrichtungen über den genannten Anschlussstecker 11 an das fahrzeugseitig vorgesehene Leitungssystem anzukoppeln. Hierdurch ergibt sich ein noch weiter verringerter Verkabelungsaufwand. Alternativ hierzu ist es möglich, die beiden Sensorelemente 2, 3 über Kontakteinrichtungen die in einen Gebläseanschlussstecker integriert sind mit dem fahrzeugseitigen Leitungssystem zu koppeln. Bei dem vorangehend beschriebenen Ausführungsbeispiel ist die Sensoreinrichtung 1 an einem Strukturbauteil der Luftführungseinrichtung 10 angebracht. Die Erfindung ist jedoch nicht auf eine derartige Ausführungsform beschränkt. Beispielsweise ist es auch möglich, die Temperaturerfassungseinrichtung 1 zur kombinierten Erfassung der Motor-Ansaugluft sowie der durch einen Kühler 9 erwärmten Luft an einem der Gebläseeinrichtung 13 oder dem Kühler 9 selbst zugeordneten Strukturbauteil anzubringen.The air guide device 10 is further connected to a suspension device 12 of a radiator fan 13. This suspension device 12 in turn is coupled to the radiator 9. It is also possible to couple the line devices provided for supplying power to a motor 14 of the blower device 13 via the connection plug 11 to the line system provided on the vehicle side. This results in an even reduced cabling effort. Alternatively, it is possible to couple the two sensor elements 2, 3 via contact devices which are integrated in a blower connection plug with the vehicle-side line system. In the embodiment described above, the sensor device 1 is attached to a structural component of the air guiding device 10. However, the invention is not limited to such an embodiment. For example, it is also possible to mount the temperature detection device 1 for the combined detection of the engine intake air as well as the air heated by a radiator 9 on a structural component assigned to the blower device 13 or the radiator 9 itself.

Es ist auch möglich, durch die erfindungsgemäße Temperaturerfassungseinrichtung 1 weitere Systemparameter wie beispielsweise die Kühlwassertemperatur in dem Kühler 9 zu erfassen. Eine derartige Temperaturerfassungseinrichtung 1 ist vorzugsweise an einem dem Kühler 9 zugeordneten Strukturbauteil ausgebildet. Durch die erfindungsgemäße Lösung wird es möglich, den Fahrzeugkühler, die Gebläseeinrichtung mit deren Aufhängungseinrichtung sowie die im Fahrzeugfrontbereich liegenden Komponenten der Motor-Ansaugluftführungseinrichtung 10 als eine, mit den erforderlichen Sensoreinrichtungen bestückte, vormontierte Baueinheit auszubilden die im Rahmen eines automatisierten Montagevorgangs auf vorteilhafte Weise montiert werden kann. Es ist möglich, die Anschlusssteckereinrichtung 11 derart auszubilden, dass diese im Rahmen des Einsetzens der genannten Baueinheit in das Fahrzeug selbsttätig mit den fahrzeugseitig vorgesehenen Anschlusskomponenten in Eingriff gelangt.It is also possible to detect further system parameters such as, for example, the cooling water temperature in the cooler 9 by the temperature detection device 1 according to the invention. Such a temperature detection device 1 is preferably formed on a structural member associated with the radiator 9. The solution according to the invention makes it possible to form the vehicle radiator, the blower device with its suspension device and the components of the engine intake air guiding device 10 located in the vehicle front area as a preassembled structural unit equipped with the required sensor devices and mounted in an advantageous manner as part of an automated assembly process can be. It is possible to design the connector plug device 11 in such a way that it automatically engages with the connection components provided on the vehicle side as part of the insertion of said assembly into the vehicle.

Claims (13)

  1. A temperature detector for operating an internal combustion engine, comprising a bearing structure (4), a first sensor element (2) for making a first temperature measurement on the bearing structure (4), a second sensor element (3) for making a second temperature measurement on the bearing structure (4), a device for conveying at least a part flow (V1') of intake air (V1) for an internal combustion engine to the first sensor element (2) and a device for supplying at least a part flow (V2') of cooling air (V2) through an internal combustion engine radiator (9) to the second sensor element (3), wherein the bearing structure (4) is situated in a region in which the two air flows (V1, V2) are near one another, wherein the two sensor elements (2, 3) are combined by the bearing structure to form a structural unit and wherein the two sensor elements (2, 3) are connected by common wiring to a cable harness or branch on the vehicle.
  2. A temperature detector according to claim 1,
    characterised in that the wiring associated with the two sensor elements is connected by a common plug structure (11) to the cable harness on the vehicle.
  3. A temperature detector according to claim 1 or claim 2,
    characterised in that the plug structure (11) is integral with the bearing structure (4).
  4. A temperature detector according to at least one of claims 1 to 3,
    characterised in that the bearing structure (4) is made of a plastics material.
  5. A temperature detector according to at least one of claims 1 to 4,
    characterised in that the bearing structure (4) forms a partition which separates the two air flows (V1', V2') from one another at least before they flow over the sensor elements (2, 3).
  6. A temperature detector according to at least one of claims 1 to 5,
    characterised in that the bearing structure (4) is integral with an air guide means.
  7. A temperature detector according to at least one of claims 1 to 6,
    characterised in that the bearing structure is integral with a device for conveying intake air to an internal combustion engine.
  8. A temperature detector according to at least one of claims 1 to 7,
    characterised in that the bearing structure (4) is incorporated in a blower holder (12).
  9. A temperature detector according to at least one of claims 1 to 8,
    characterised in that the bearing structure (4) is provided on a radiator water reservoir.
  10. A temperature detector according to at least one of claims 1 to 9,
    characterised in that the sensor elements (2, 3) are disposed near one another.
  11. A temperature detector according to at least one of claims 1 to 10,
    characterised in that the bearing structure (4) is situated in the region in which a line for conveying a flow (V1) of intake air to an internal combustion engine passes by a radiator blower (13).
  12. A temperature detector according to claim 11,
    characterised in that in the said region the line is coupled to the engine radiator (9) or to a part of the radiator blower (13).
  13. A temperature detector according to at least one of claims 1 to 12,
    characterised in that an additional sensor element is provided for detecting the cooling-water temperature and the said sensor element is likewise connected by the common wiring to the cable harness on the vehicle.
EP02007544A 2001-05-22 2002-04-03 Temperature sensor for an internal combustion engine Expired - Lifetime EP1260686B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10124852 2001-05-22
DE10124852A DE10124852A1 (en) 2001-05-22 2001-05-22 Temperature detection device for an internal combustion engine

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EP1260686A2 EP1260686A2 (en) 2002-11-27
EP1260686A3 EP1260686A3 (en) 2004-12-01
EP1260686B1 true EP1260686B1 (en) 2008-08-13

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KR100570325B1 (en) * 2004-01-07 2006-04-11 주식회사 케피코 rationality check method of oil temperature sensor

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Also Published As

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DE10124852A1 (en) 2002-12-05
US6644850B2 (en) 2003-11-11
DE50212624D1 (en) 2008-09-25
EP1260686A3 (en) 2004-12-01
EP1260686A2 (en) 2002-11-27
US20020177937A1 (en) 2002-11-28

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