WO2011069865A2 - Procédé pour contrôler un capteur de température de liquide de refroidissement d'un véhicule automobile et dispositif de commande - Google Patents

Procédé pour contrôler un capteur de température de liquide de refroidissement d'un véhicule automobile et dispositif de commande Download PDF

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Publication number
WO2011069865A2
WO2011069865A2 PCT/EP2010/068552 EP2010068552W WO2011069865A2 WO 2011069865 A2 WO2011069865 A2 WO 2011069865A2 EP 2010068552 W EP2010068552 W EP 2010068552W WO 2011069865 A2 WO2011069865 A2 WO 2011069865A2
Authority
WO
WIPO (PCT)
Prior art keywords
coolant temperature
tco
internal combustion
combustion engine
coolant
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
PCT/EP2010/068552
Other languages
German (de)
English (en)
Other versions
WO2011069865A3 (fr
Inventor
Gerhard Eser
Stefan Seyfferth
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.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies GmbH
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 Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Priority to US13/515,040 priority Critical patent/US8538623B2/en
Priority to KR1020127017449A priority patent/KR101759064B1/ko
Publication of WO2011069865A2 publication Critical patent/WO2011069865A2/fr
Publication of WO2011069865A3 publication Critical patent/WO2011069865A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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
    • F02D2200/021—Engine temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for monitoring a coolant temperature sensor of a motor vehicle. Furthermore, the invention relates to a control device, in particular ei ⁇ ne engine control device, by means of which a method according to the invention can be carried out and carried out.
  • the monitoring, ie detection, of a "hanging" coolant temperature sensor is required, which is carried out in cooling systems with mechanical thermostats during vehicle standstill.
  • a "hanging" coolant temperature sensor is understood to mean a temperature sensor whose measured value is understood over a relatively long period of time not or only slightly changes or shows only a slight dynamics in its output measured value.
  • a sol ⁇ che monitoring can be lusst beeinf- by a built-up in the motor vehicle auxiliary heating at a start of the engine. It is also becoming more and more desirable to have hanging ones Coolant temperature sensors also diagnose during operation of the internal combustion engine.
  • DE 196 08 340 AI discloses a method for controlling an internal combustion engine, which checks before starting the internal combustion engine, whether a preheating of the internal combustion engine is effected by means of a block heater. As a measure of this, a difference between a temperature of the internal combustion engine and a temperature of the intake air of the internal combustion engine is used. If this difference is above a predetermined minimum value, the starting point is a preheating of the internal combustion engine by means of the block heater and this is taken into account when the internal combustion engine is activated during an actual start.
  • auxiliary heater The operation of an auxiliary heater is usually provided to an engine control device of the motor vehicle as information. Based on this information, a monitoring of the coolant temperature sensor can be corrected or corrected for a certain time, for. B. an entire driving cycle, be prevented. However, this information is not always present correctly when the internal combustion engine is started.
  • the erfindungsge ⁇ Permitted method should thereby be implemented as inexpensively as possible and in particular get along without additional components on / in the motor vehicle.
  • the object of the invention is achieved by a method for monitoring a coolant temperature sensor of a motor vehicle, according to claim 1; and by a control device, in particular by a motor control device for a motor vehicle, according to claim 10.
  • a coolant temperature is determined shortly before, for, or shortly after, that is to say when a combustion engine of the motor vehicle is started by a coolant temperature sensor.
  • the coolant temperature sensor is diagnosed as a functioning coolant temperature sensor. Ie. temporally after the start of the internal combustion engine and / or a start of a coolant pump of a cooling system of the internal combustion engine, the coolant temperature sensor is also at a drop of a Actual value of the coolant temperature diagnosed in the short term after a first measurement of the coolant temperature as a functional coolant temperature sensor.
  • the coolant temperature sensor is diagnosed as a functional coolant temperature sensor when the coolant temperature increases relatively quickly in time for a short time. This not only has to be related to the start of the internal combustion engine, but may also depend on the start of the coolant pump. Ie. the initial drop and the short term dar ⁇ on the following rise in the coolant temperature, ie a sagging of the coolant temperature, based on warmed up coolant in the relevant part of a cycle ofharisys- system, whereas another portion of the coolant has a lower temperature, in particular outside temperature has. Ie. the internal combustion engine or the motor vehicle has been heated or preheated by means of an additional heater. This concerns in particular parking heaters and or block heaters; Of course, other additional heaters are also detectable in this way.
  • An advantage of the method according to the invention is that a pre-heating of the motor vehicle, preferably that of an interior space and / or of the internal combustion engine or of an engine block, can be detected without the presence of information from a motor control.
  • This is particularly advantageous for retrofitted auxiliary heaters, since these are usually not known to the motor control. Ie.
  • additional heating installed subsequently can be detected by the engine control, that is to say at least the presence of additional heating and possibly its operation.
  • OBD On-Board Diagnosis
  • the method according to the invention is easy to use, since only information is combined in a novel way in order to arrive at the result according to the invention.
  • An additional construction effort does not exist in the inventive method, d. H. the inventive method is inexpensive to implement, since it requires no additional components in the vehicle and z. B. in a control device, such.
  • B. an ECU (Engine Control Unit), can be implemented for the internal combustion engine.
  • the coolant temperature with an outside temperature, for. B. determined by an ambient temperature sensor, with an intake air temperature, for. B. determined by an intake air temperature sensor, or with another temperature information, eg. As an externally provided wirelessly compared. It is also possible to calculate this temperature information by calculation from other known values. At a certain deviation then an unexpectedly high coolant temperature is output and proceed as above.
  • a preferred criterion for detecting a start of the internal combustion engine with prior heating by an additional heater so a criterion for a functional ⁇ efficient, non-hanging coolant temperature sensor is z.
  • Start of the internal combustion engine or the coolant pump deviates downwards from the coolant temperature at the start of the internal combustion engine or the coolant pump.
  • a size of an area of a warm-up curve of the coolant temperature which is limited by the warming curve from the start of the engine or the coolant pump to the As ⁇ those rich a given coolant temperature, in particular the coolant temperature at the start of the engine is suitable.
  • a respective criterion can be a current ler, averaged, maximum and / or minimum value, that is to say a deviation, a gradient, a time duration, a size of the surface, etc.
  • the method according to the invention is preferably carried out as a course monitoring of the coolant temperature.
  • the progress monitoring is preferred with a narrow temporal grid, z.
  • a 50ms-, 75ms-, 100ms-, 125ms-, 150ms-, 200ms- or 250ms grid preferably at least until a rise in the coolant temperature or in particular at least to an end of the saggingdemit ⁇ teltemperatur, ie the Wiedererich the first measured coolant temperature performed.
  • a period of time slot for an incipient drop in the coolant temperature can 0.05s to 2s, especially 0.15s to 1.5s and 0.25s preferred to 1.25s Betra ⁇ gen.
  • the coolant ⁇ temperature is different depending on the cooling system and originally measured coolant temperature.
  • empirical values or simulated values are preferably used, whereby it is important, in addition to the dimensions of the cooling system, to use NEN influence of a speed of the coolant pump to be considered. Intermediate values can be interpolated or simulated, for example.
  • Figure 1 shows an exemplary temporal course of a sensor signal of a functional coolant tempera ⁇ tursensors or a proper time course of a coolant temperature of an engine cooling system during and after a cold start of an internal combustion engine of a motor vehicle without a previously Betrie ⁇ bene additional heating.
  • FIG. 2 shows a time profile of the sensor signal or the
  • Coolant temperature analogous to FIG. 1, but with a previously operated, independent of the internal combustion engine auxiliary heater of the motor vehicle.
  • TAM auxiliary heaters are used in the motor vehicle. Such additional heating is independent of the engine heater, which may be an internal or external electric or combustion auxiliary heating. So the additional heating z. B. a
  • Fig. 1 shows the start of an internal combustion engine without a time previously operated auxiliary heater.
  • the coolant temperature TCO rises steadily in the first few minutes.
  • Fig. 2 shows a similar case, but with time previously operated auxiliary heating.
  • the sagging of the coolant temperature TCO is characterized by an area A, which is from the coolant temperature TCO between the times ts t and to or closed ⁇ is closed.
  • a start of the internal combustion engine or the coolant pump with prior auxiliary heating of the motor vehicle can be detected according to the invention due to the sagging of the coolant temperature without digital information from the engine control by this component.
  • This is done z. B. by a delta of the sagging of the coolant temperature TCO (TCO st -TCO akt ueii) or a negative gradient ofdemit ⁇ teltemperatur TCO shortly after the start in question.
  • the area A is applicable, which is wound up after the respective start of a warm-up curve of the coolant temperature TCO to a certain time t ⁇ to, in particular, this specific time to, in which the current coolant temperature TCO a ktueii again equal to the coolant temperature TCO st is at the respective start t st .
  • the inventive method is carried out only after a comparatively long shutdown time, wherein the shutdown time is preferably at least about 4h to 8h. Furthermore, the method is preferably carried out only at low outside temperatures TAM. In this case, the outside temperatures are preferably below 10 ° C., in particular below 0 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

L'invention concerne un procédé pour contrôler un capteur de température de liquide de refroidissement d'un véhicule automobile. Selon ce procédé, une valeur réelle (TCOist= TCOSt) d'une température de liquide de refroidissement (TCO) est déterminée par un capteur de température de liquide de refroidissement lors d'un démarrage (t = tSt) d'un moteur à combustion interne du véhicule automobile, et le capteur de température de liquide de refroidissement est diagnostiqué comme étant en état de marche si la valeur réelle (TCOist= TCOSt) de la température de liquide de refroidissement (TCO) baisse peu de temps (t < tmin< t0) après le démarrage (t = tSt) du moteur à combustion interne. L'invention concerne en outre un dispositif de commande, en particulier un dispositif de commande de moteur, au moyen duquel un procédé selon l'invention peut être mis en oeuvre et est mis en oeuvre.
PCT/EP2010/068552 2009-12-09 2010-11-30 Procédé pour contrôler un capteur de température de liquide de refroidissement d'un véhicule automobile et dispositif de commande Ceased WO2011069865A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/515,040 US8538623B2 (en) 2009-12-09 2010-11-30 Method for monitoring a coolant temperature sensor of a motor vehicle and controller
KR1020127017449A KR101759064B1 (ko) 2009-12-09 2010-11-30 자동차의 냉각제 온도 센서를 감시하는 방법 및 제어기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009057586.3 2009-12-09
DE102009057586.3A DE102009057586B4 (de) 2009-12-09 2009-12-09 Verfahren zum Oberwachen eines Kühlmittel-Temperatursensors eines Kraftfahrzeugs mit einem Verbrennungsmotor und einer Zusatzheizung sowie Steuereinrichtung

Publications (2)

Publication Number Publication Date
WO2011069865A2 true WO2011069865A2 (fr) 2011-06-16
WO2011069865A3 WO2011069865A3 (fr) 2011-09-22

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PCT/EP2010/068552 Ceased WO2011069865A2 (fr) 2009-12-09 2010-11-30 Procédé pour contrôler un capteur de température de liquide de refroidissement d'un véhicule automobile et dispositif de commande

Country Status (4)

Country Link
US (1) US8538623B2 (fr)
KR (1) KR101759064B1 (fr)
DE (1) DE102009057586B4 (fr)
WO (1) WO2011069865A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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WO2012063113A1 (fr) * 2010-11-11 2012-05-18 Toyota Jidosha Kabushiki Kaisha Appareil et procédé de détermination d'anomalie d'un capteur de température pour liquide de refroidissement, et système de refroidissement de moteur
WO2013066750A1 (fr) * 2011-11-02 2013-05-10 Honda Motor Co., Ltd. Procédés et systèmes de surveillance d'un capteur de température de liquide de refroidissement de moteur

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DE102011088409B3 (de) * 2011-12-13 2013-03-14 Continental Automotive Gmbh Verfahren und Vorrichtung zur Überwachung eines Temperatursensors
CN102901646B (zh) * 2012-10-29 2015-12-16 中国北车集团大连机车研究所有限公司 动车组冷却装置试验台
US9500117B2 (en) 2013-03-12 2016-11-22 Briggs & Stratton Corporation Cooling system for air-cooled engine
US9945281B2 (en) * 2015-12-15 2018-04-17 Briggs & Stratton Corporation Cooling system for air-cooled engines
US10106142B2 (en) * 2016-02-11 2018-10-23 GM Global Technology Operations LLC Method and apparatus to monitor a temperature sensor
US10859056B2 (en) 2016-10-19 2020-12-08 Bostic Motors Inc. Electronic control for engine block heater elements
JP6491632B2 (ja) * 2016-11-09 2019-03-27 株式会社Ｓｕｂａｒｕ 車両用冷却装置
DE102018100992B4 (de) * 2018-01-17 2026-01-08 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Überwachungsvorrichtung für eine Kühlvorrichtung
GB2574625B (en) * 2018-06-13 2020-09-09 Delphi Automotive Systems Lux Method to determine the use of a block heater
CN110398375B (zh) * 2019-07-16 2021-10-19 广州亚美信息科技有限公司 车辆冷却系统工作状态的监测方法、装置、设备和介质
FR3114637B1 (fr) * 2020-09-28 2022-10-14 Valeo Systemes Thermiques Procédé de contrôle d’un compresseur à cylindrée fixe pour système de refroidissement d’un véhicule automobile à combustion
DE102022214357B3 (de) 2022-12-23 2024-03-14 Volkswagen Aktiengesellschaft Verfahren und Vorrichtung zum Erkennen des Betriebs einer motorunabhängigen Zusatzheizung und zur Diagnose eines Kühlmitteltemperatursensors eines Kraftfahrzeugs

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2012063113A1 (fr) * 2010-11-11 2012-05-18 Toyota Jidosha Kabushiki Kaisha Appareil et procédé de détermination d'anomalie d'un capteur de température pour liquide de refroidissement, et système de refroidissement de moteur
WO2013066750A1 (fr) * 2011-11-02 2013-05-10 Honda Motor Co., Ltd. Procédés et systèmes de surveillance d'un capteur de température de liquide de refroidissement de moteur
US8849540B2 (en) 2011-11-02 2014-09-30 Honda Motor Co., Ltd. Methods and systems for monitoring engine coolant temperature sensor

Also Published As

Publication number Publication date
US20120330496A1 (en) 2012-12-27
WO2011069865A3 (fr) 2011-09-22
KR20120116957A (ko) 2012-10-23
DE102009057586B4 (de) 2016-02-18
DE102009057586A1 (de) 2011-06-16
US8538623B2 (en) 2013-09-17
KR101759064B1 (ko) 2017-07-18

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