WO2014114292A1 - Steuerung eines verbrennungsmotors - Google Patents
Steuerung eines verbrennungsmotors Download PDFInfo
- Publication number
- WO2014114292A1 WO2014114292A1 PCT/DE2014/200010 DE2014200010W WO2014114292A1 WO 2014114292 A1 WO2014114292 A1 WO 2014114292A1 DE 2014200010 W DE2014200010 W DE 2014200010W WO 2014114292 A1 WO2014114292 A1 WO 2014114292A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- internal combustion
- combustion engine
- clutch
- motor vehicle
- determined
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits specially adapted for starting of engines
- F02N11/0814—Circuits specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits specially adapted for starting of engines
- F02N11/0814—Circuits specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0833—Vehicle conditions
- F02N11/0837—Environmental conditions thereof, e.g. traffic, weather or road conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/12—Parameters used for control of starting apparatus said parameters being related to the vehicle exterior
- F02N2200/121—Atmospheric pressure, e.g. for determination of geodetic height
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/12—Parameters used for control of starting apparatus said parameters being related to the vehicle exterior
- F02N2200/122—Atmospheric temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/12—Parameters used for control of starting apparatus said parameters being related to the vehicle exterior
- F02N2200/124—Information about road conditions, e.g. road inclination or surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/12—Parameters used for control of starting apparatus said parameters being related to the vehicle exterior
- F02N2200/125—Information about other vehicles, traffic lights or traffic congestion
-
- 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 control of an internal combustion engine.
- the invention relates to a method, a device and a computer program product for start-stop control of an internal combustion engine for a motor vehicle.
- An internal combustion engine for driving a motor vehicle can be temporarily switched off in certain situations in order to save fuel.
- the internal combustion engine can be turned off during a downhill ride or while waiting at an intersection.
- DE 10 2008 049 421 A1 shows a start-stop system for an internal combustion engine for a motor vehicle.
- a coolant pump which circulates a coolant through the internal combustion engine and possibly other components, be turned off, so that heat can not be transported between the components.
- the invention has for its object to prevent thermal overload of a component of an internal combustion engine during its temporary shutdown by a start-stop system.
- the invention solves this object by means of a method, a device and a computer program product having the features of the independent claims. Subclaims give preferred embodiments again.
- Internal combustion engine for a motor vehicle Steps of detecting a temporary shutdown condition for the internal combustion engine and the shutdown of the internal combustion engine, wherein the shutdown takes place only when the temperature of a clutch connected to the internal combustion engine is below a predetermined threshold.
- the temperature of the coupling can be determined in particular on the basis of parameters of
- the temperature of the clutch is determined based on its load before parking.
- the stress may be determined based on a torque transmitted through the clutch, an opening degree, an actuation time of the clutch, or a combination of these values.
- the temperature of the clutch can be determined improved, even before the frictional heat generated at the clutch has been reflected in another determinable parameter.
- the threshold value can be determined as a function of an anticipated heating of the clutch during an imminent starting operation.
- the starting process directly follows a restart of the internal combustion engine after the temporary shutdown.
- the coupling can be additionally heated, so that if it had previously had a high temperature, it will overheat during start-up. By considering the upcoming startup, this overheating can be avoided.
- the temperature increase of the clutch during the starting process may be dependent on a total mass of the motor vehicle, for example.
- the expected heating can also be determined on the basis of a roadway inclination.
- the motor vehicle is located on a slope, the clutch is usually heated during the starting process less than when the motor vehicle is in the plane or even on a slope.
- the road inclination can be determined, for example, by means of a sensor or on the basis of a position of the motor vehicle in conjunction with map data in the region of the position.
- the clutch is coolable by ambient air and the threshold is determined in dependence on a parameter of the ambient air.
- the coupling is housed in a housing and runs in an oil bath. The housing, and thus also the oil bath, are in contact with ambient air and can be cooled by it.
- the threshold value can be selected to be higher than if only a slight cooling through the air had to be assumed.
- the cooling effect of the ambient air can be taken into account, in particular during the temporary standstill of the internal combustion engine. The overheating of the clutch can thereby be avoided without the engine continuing to run unnecessarily during the presence of the temporary shutdown condition.
- the parameter may include an air temperature.
- the air temperature can be determined directly by means of a sensor, for example.
- the parameter may also include air density.
- the air density can be determined via the air pressure based on a barometric measurement or based on a position of the motor vehicle in conjunction with map data for altitude determination. Ambient air at a higher pressure can generally absorb more heat than those at a lower pressure.
- the parameter may include a flow velocity of the ambient air.
- the flow velocity can be derived, for example, from a speed of the motor vehicle. It can also be provided a ventilation device, from the operation of the flow rate can be estimated. Furthermore, the flow rate can also be determined directly by means of an anemometer, for example.
- Humid air is generally able to absorb more heat than dry air.
- a computer program product comprises program code means for carrying out the method described, when the computer program product is executed on a processing device or stored on a computer-readable data carrier.
- a control device for controlling an internal combustion engine for a motor vehicle comprises a first interface for detecting a temporary shutdown condition for the internal combustion engine and a second interface for shutting down the internal combustion engine as a function of the shutdown condition.
- the control device is configured to switch off the internal combustion engine only when the temperature of a clutch connected to the internal combustion engine is below a predetermined threshold value.
- Figure 1 is a schematic view of a motor vehicle with an internal combustion engine
- FIG. 2 is a flowchart of a method for controlling the internal combustion engine of FIG. 1.
- FIG. 1 shows a schematic view of a motor vehicle 100 with an internal combustion engine 105 for driving the motor vehicle 100.
- the internal combustion engine 105 can be coupled by means of a clutch 110 to a transmission 15 which is part of a drive train of the motor vehicle 100.
- the coupling 110 may comprise a single-disc or a multi-plate clutch and is accommodated in a housing 120, which encloses a liquid bath, in particular an oil bath, in a wet-running clutch 110.
- the liquid in the housing 120 absorbs heat from the coupling 110 and can be actively circulated by means of a pump or passively by means of spray convection as long as the internal combustion engine 105 is running.
- the clutch 1 10 may be comprised of a dual clutch.
- a controller 125 is configured to temporarily stop the engine 105 if a corresponding shutdown condition exists.
- the control device 125 has a first interface 130 for detecting the temporary shutdown condition.
- the first interface 130 may, for example, be connected to a sensor, a further control unit or an operating element for a driver of the motor vehicle 100.
- the processing device 125 switches off the internal combustion engine 105 via a second interface 135.
- the internal combustion engine 105 can be restarted later via the same second interface 135 or else via another interface if the shut-off condition is canceled or a corresponding signal for starting the internal combustion engine 105, for example from a sensor or an operating element for the driver of the motor vehicle 100, Will be received.
- the processing device 125 may also include a third interface 140, by means of which it is connected to one or more sensors 145.
- the sensor 145 may determine a temperature at one or more locations of the internal combustion engine 105. Further, the sensor 145 may provide one or more other parameters of ambient air that may cool the clutch 110 or its housing 120, in particular, humidity, flow rate, or air temperature.
- the sensor 145 may also determine and combine multiple values to provide a derived value.
- the sensor 145 may include a positioning device, such as a satellite navigation receiver, to determine the position of the motor vehicle 100 and then, based on map data at the particular position, a grade of a driving distance on which the motor vehicle 100 is located.
- a positioning device such as a satellite navigation receiver
- an air density may be determined by determining a height of the motor vehicle 100 above normal zero based on its position by means of the positioning means and the map data.
- the control device 125 differs from a known start-stop control for the internal combustion engine 105 in that the temporary shutdown of the internal combustion engine 105 is only effected when the determined or anticipated temperature of the clutch 1 10 is below a predetermined threshold. Otherwise, the engine 105 is driven to continue running while the transient engine Shutdown condition is present to cool the clutch 1 10 by convection and thus prevent their overheating.
- FIG. 2 shows a flow chart of a method 200 for controlling the internal combustion engine 105 of FIG. 1.
- the method 200 is set up in particular for execution on the control device 125.
- the illustrated embodiment includes a number of optional steps that may not necessarily be implemented for the operation of the method 200.
- the internal combustion engine 105 is in operation. This can be the case, for example, in a normal driving operation of the motor vehicle 100.
- one or more operating parameters of the internal combustion engine 105 are detected. These operating parameters may include, for example, temperatures at various locations of the internal combustion engine 105, a fuel consumption, an output torque, a rotational speed or other parameters.
- a current or past stress on the clutch 1 10 is detected. Friction heat is generated in particular when the clutch 1 10 is only partially closed, a large torque on the clutch 1 10 is transmitted or a speed difference between its input side and their Output side is large. The resulting from the stress of the clutch 1 10 heat can thus be considered in the determination of the temperature of the clutch 1 10, even if this heat has not been reflected in a measured value, for example, the temperature of the transmission 1 15. Alternatively, the heating suggested by the stress on the coupling may be included in the determination of a threshold, as described in more detail below.
- a step 220 the temperature of the clutch 1 10 is determined.
- the information of steps 210 or 215 can be used.
- a step 225 it is checked whether a temporary stop condition is fulfilled.
- the temporary stop condition is usually determined automatically and causes a temporary shutdown of the internal combustion engine 105, if this is not required for the operation of the motor vehicle 100.
- This temporary parking differs from a parking, which is usually preceded by leaving the motor vehicle 100 by the driver.
- the Abstellbedingung can for example be present when the motor vehicle 100 rolls or rolls or when the motor vehicle 100 has come to a standstill, without a driver's request for leaving the motor vehicle 100 has been determined.
- step 230 it is checked in a step 230 whether the clutch temperature determined in step 220 is below a predetermined threshold value. If the temperature of the clutch is below the threshold value, the internal combustion engine 105 is temporarily switched off in step 235. Otherwise, the shutdown is prevented and the method 200 may return to step 205 and re-run.
- step 235 in which the engine 105 is turned off, can be branched back to step 205 of the method 200 in the presence of a corresponding condition via a starting operation.
- the threshold at which the temperature of the clutch 110 is compared at step 330 may be determined in a number of different ways. The variants shown below are not exhaustive and can be combined with each other. In a first variant, a fixed threshold value is assumed in a step 240. This variant lends itself to the simplest possible and robust control of the internal combustion engine 105.
- an anticipated heating of the clutch 1 10 can be taken into account in a foreseeable starting process.
- a starting process is foreseeable especially if the internal combustion engine 105 is parked, for example, in stop-and-go mode or at a traffic light. Such a situation can be concluded when the motor vehicle 100 is already at standstill when the internal combustion engine 105 is switched off or when the motor vehicle has only reached a low speed since the last start-up and / or has traveled only a short distance.
- the expected heating of the clutch 1 10 during the imminent starting process can be assumed as a fixed predetermined size. The heating may also be dependent on a total mass of the motor vehicle 100 and the mass may be taken into account in the determination of the heating.
- the heating may be increased if the motor vehicle 100 is on a slope and reduced when it is on a slope.
- the road inclination may be determined in an optional step 250 before the heating is determined in step 245.
- the predetermined threshold may then be determined based on the determined heating of the clutch 110, for example, by reducing the predetermined value of step 240 by the particular heating.
- the threshold value may also be determined on the basis of an air temperature of an ambient air in the region of the clutch 110 or of the housing 120. The higher the air temperature, the lower the threshold is usually.
- the threshold may be determined based on humidity. The higher the humidity, the higher the threshold can be selected.
- the threshold may also be determined based on the air density. The higher the air density, the higher the threshold can be selected.
- the threshold value may also be determined on the basis of a flow velocity of the ambient air in the region of the coupling 110 or of the housing 120.
- the threshold may be determined in step 240 and increased or decreased in one or more of steps 245-270.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112014000553.3T DE112014000553A5 (de) | 2013-01-25 | 2014-01-20 | Steuerung eines Verbrennungsmotors |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013201218.7 | 2013-01-25 | ||
| DE102013201218 | 2013-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014114292A1 true WO2014114292A1 (de) | 2014-07-31 |
Family
ID=50382169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2014/200010 Ceased WO2014114292A1 (de) | 2013-01-25 | 2014-01-20 | Steuerung eines verbrennungsmotors |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE112014000553A5 (de) |
| WO (1) | WO2014114292A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060009325A1 (en) * | 2004-07-09 | 2006-01-12 | Jatco Ltd | System and method of controlling idle-stop vehicle |
| DE102005029566A1 (de) * | 2004-06-30 | 2006-02-02 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Verfahren zum Schutz einer automatisiert betätigten Kupplung eines Fahrzeus gegen Überlastung |
| DE102008049421A1 (de) | 2007-10-11 | 2009-04-16 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Verfahren zur Steuerung eines Start-Stopp-Systems für ein Fahrzeug mit Handschaltgetriebe und Vorrichtung hierzu |
| EP2236374A1 (de) * | 2009-03-30 | 2010-10-06 | JATCO Ltd | Appareil de commande pour véhicule hybride |
| DE102011085750A1 (de) | 2010-11-11 | 2012-05-16 | Schaeffler Technologies Gmbh & Co. Kg | Verfahren zur Steuerung einer automatisierten Kupplung oder eines automatisierten Getriebes oder einer Antriebseinheit in einem Fahrzeug |
-
2014
- 2014-01-20 WO PCT/DE2014/200010 patent/WO2014114292A1/de not_active Ceased
- 2014-01-20 DE DE112014000553.3T patent/DE112014000553A5/de not_active Ceased
- 2014-01-20 DE DE102014200903.0A patent/DE102014200903A1/de not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005029566A1 (de) * | 2004-06-30 | 2006-02-02 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Verfahren zum Schutz einer automatisiert betätigten Kupplung eines Fahrzeus gegen Überlastung |
| US20060009325A1 (en) * | 2004-07-09 | 2006-01-12 | Jatco Ltd | System and method of controlling idle-stop vehicle |
| DE102008049421A1 (de) | 2007-10-11 | 2009-04-16 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Verfahren zur Steuerung eines Start-Stopp-Systems für ein Fahrzeug mit Handschaltgetriebe und Vorrichtung hierzu |
| EP2236374A1 (de) * | 2009-03-30 | 2010-10-06 | JATCO Ltd | Appareil de commande pour véhicule hybride |
| DE102011085750A1 (de) | 2010-11-11 | 2012-05-16 | Schaeffler Technologies Gmbh & Co. Kg | Verfahren zur Steuerung einer automatisierten Kupplung oder eines automatisierten Getriebes oder einer Antriebseinheit in einem Fahrzeug |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014200903A1 (de) | 2014-07-31 |
| DE112014000553A5 (de) | 2015-11-05 |
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