EP1317615A1 - Verfahren zum bestimmen einer heissstartsituation bei einer brennkraftmaschine - Google Patents
Verfahren zum bestimmen einer heissstartsituation bei einer brennkraftmaschineInfo
- Publication number
- EP1317615A1 EP1317615A1 EP01969227A EP01969227A EP1317615A1 EP 1317615 A1 EP1317615 A1 EP 1317615A1 EP 01969227 A EP01969227 A EP 01969227A EP 01969227 A EP01969227 A EP 01969227A EP 1317615 A1 EP1317615 A1 EP 1317615A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- internal combustion
- combustion engine
- hot start
- engine
- 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.)
- Granted
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
- F02D41/02—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
- F02D41/065—Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- 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
Definitions
- the invention relates to a method for determining a hot start situation in an internal combustion engine of a motor vehicle.
- the invention also relates to a corresponding control device for an internal combustion engine, a corresponding computer program with program code means and a corresponding computer program product with program code means.
- a hot start situation is generally spoken of if, for example, after a brief pause in operation, the internal combustion engine is then still hot.
- the hot engine When the hot engine is at rest, fuel vapor bubbles form in the fuel lines and also in the injection valve itself. In a subsequent starting process, these fuel vapor bubbles then hinder the regular fuel metering.
- An extended injection signal is therefore output under hot start conditions, so that a certain minimum amount of fuel can be made available to the combustion process even when fuel vapor bubbles occur. This inevitably raises the question of when there is a hot start situation.
- DE 40 39 598 AI discloses a hot start method and a hot start device for an internal combustion engine. A hot start situation is assumed for the teaching given there if both the engine temperature and the
- Intake air temperature exceeds certain threshold values and, moreover, the difference in amount between the intake air temperature at an earlier point in time and the intake air temperature at a new start are above a selectable threshold.
- DE 44 35 419 AI discloses a control system for the fuel metering of an internal combustion engine. A hot start situation is assumed and a corresponding hot start bit is set if the
- Internal combustion engine temperature exceeds a first threshold and in addition an increase in the intake air temperature by a certain amount has occurred since a last measurement.
- the last value can be the one that prevailed at the time the internal combustion engine was switched off and the new value can be obtained when the ignition or the starter is switched on.
- the hot start bit remains set until the engine temperature falls below a second threshold value or until a predetermined one
- Total air mass has flowed through the intake pipe.
- the last-mentioned total air mass is determined here by integrating the signal from an air mass sensor in the intake pipe.
- the invention has for its object a method for determining a hot start situation in a
- a method for determining a hot start situation in an internal combustion engine of a motor vehicle is further developed compared to the prior art in that a hot start situation is recognized at least on the basis of a gradient and / or a temperature rise in a temperature profile of an engine temperature.
- a further temperature profile of the internal combustion engine can be diagnosed in a particularly advantageous manner by evaluating the temperature profile. The detection of a hot start situation on the basis of the temperature profile between turning it off and starting it again is advantageous
- the advantageous further development provides that the detection takes place during a control unit run-on after the internal combustion engine has been switched off.
- This training can be a particularly reliable and technically simple way Temperature curve of the internal combustion engine can be detected.
- the duration of the control unit overrun must be dimensioned so that the temperature curve can be analyzed long enough.
- the engine temperature based on a coolant temperature and / or is advantageous
- Intake air temperature and / or a temperature of a temperature sensor in the engine compartment of the motor vehicle is determined.
- the evaluation of the coolant temperature that is to say generally the cooling water temperature, is particularly advantageous because the temperature is determined by an
- Coolant circuit of the motor vehicle already existing temperature sensor can be detected and thus an additional temperature sensor can be dispensed with.
- a further development provides that, as further criteria for a hot start situation, at least the engine temperature and / or an intake air temperature must be greater than an applicable clamp. This additional criterion once again significantly improves the reliability of the method according to the invention. It is also provided that the gradient and / or the temperature rise in the temperature profile of the engine temperature must be greater than an applicable threshold in order to identify a hot start situation.
- Motor vehicle types can be adapted with different internal combustion engines. It can be adapted to both diesel and gasoline engines.
- a particularly preferred development provides for the applicable thresholds to be dimensioned such that an elevated temperature of a high-pressure fuel pump arranged in the combustion chamber is recognized.
- This configuration is with modern internal combustion engines
- High pressure fuel injection is particularly advantageous.
- an internal combustion engine with gasoline direct injection should be mentioned, which is set out in the exemplary embodiment of the invention.
- a further development provides for an independent method for determining a hot start situation to be carried out at the same time and for a hot start situation to be identified when one of the two methods detects a hot start situation.
- a difference between the intake air temperature when switching off and when starting the internal combustion engine and an engine temperature threshold can advantageously be used as a criterion.
- Such a method carried out in parallel can be carried out, for example, using the aforementioned DE 44 35 419 AI.
- the temperature rise is the difference between the maximum temperature during the control unit run-on and one
- the shutdown temperature of the internal combustion engine is and that the gradient is formed on the basis of the temperature profile during the control unit run-on. In this way, the evaluation-relevant criteria for hot start detection during control unit overrun can be determined.
- the computer program according to the invention has program code means to carry out all steps of the method according to the invention when the program is executed on a computer, in particular a control unit for an internal combustion engine of a motor vehicle.
- the invention is thus implemented by a program stored in the control device, so that this control device provided with the program represents the invention in the same way as the method, for the execution of which the program is suitable.
- the computer program product according to the invention has program code means which are stored on a computer-readable data carrier in order to carry out the method according to the invention if the program product is on a computer, in particular on a
- Control unit for an internal combustion engine of a motor vehicle is executed.
- the invention is thus implemented by a data carrier, so that the method according to the invention can be carried out if the program product or the data carrier is integrated into a control device for an internal combustion engine, in particular a motor vehicle.
- a data carrier or as
- an electrical storage medium can be used, for example a read-only memory (ROM), an EPROM or an electrical permanent memory such as a CD-ROM or DVD.
- ROM read-only memory
- EPROM EPROM
- electrical permanent memory such as a CD-ROM or DVD.
- FIG. 1 shows an exemplary embodiment of the method according to the invention
- FIG. 2 shows a representation of measured values when carrying out the method according to the invention.
- FIG. 1 shows an exemplary embodiment of the method according to the invention for determining a hot start situation in an internal combustion engine of a motor vehicle.
- the internal combustion engine of the motor vehicle is initially in normal engine operation. In other words: the motor vehicle or the internal combustion engine is running and a normal operating sequence is taking place.
- step 102 it is assumed that the driver of the motor vehicle intends to switch off the internal combustion engine. This can be done, for example, by turning the ignition key.
- the current engine shutdown temperature tmotab is stored in step 102.
- the engine shutdown temperature tmotab corresponds to the temperature of the cooling water temperature tmot determined by the cooling water sensor.
- step 103 the engine or the internal combustion engine of the motor vehicle is switched off.
- step 104 the further cooling water temperature profile tmot is considered according to the invention during a control unit run-on.
- the maximum engine temperature tmotmax and the maximum gradient tmotgradmax of the engine temperature or, in this embodiment, the cooling water temperature are determined and stored.
- step 105 it is assumed that the driver of the motor vehicle again the internal combustion engine want to start.
- the control unit of the internal combustion engine is initialized before the restart. After the initialization of the control device before the restart in step 105, the temperature difference from the maximum engine temperature tmotmax is first formed in step 106 during the control device run-on after the engine has been switched off and the engine shutdown temperature tmotab from step 102.
- step 106 checks whether this temperature difference from tmotmax and tmotab is greater than an applicable temperature-dependent threshold or whether the maximum gradient of the engine temperature tmotgradmax determined during the control unit run-on is greater than an applicable temperature-dependent threshold. If it is determined that none of the threshold values has been exceeded, the process proceeds to step 107, in which a conventional hot start detection is additionally carried out. Such a conventional hot starter detection can take place, for example, analogously to DE 44 35 419 AI, which is described in the introduction to the description. If no hot start is determined in step 107 even with this hot start detection, the process moves to step 108, in which it is finally determined that there is no hot start situation. The method according to the invention for determining a hot start situation is ended in step 109. Depending on whether a hot start situation was concluded or not, the corresponding setting parameters of the internal combustion engine are changed.
- step 110 it is additionally checked whether the engine temperature and / or the intake air temperature is in each case above an applicable threshold value. If this is not the case, the process proceeds to step 108 and a decision is made that none Hot start situation exists. This is the case if, for example, a high maximum temperature value tmotmax and thus a high temperature rise (tmotmax-tmotab) and / or a maximum temperature gradient of the engine temperature tmotgradmax is determined during the control unit run-on immediately after the motor vehicle has been parked, but the car is subsequently sufficient can cool down for a long time so that the engine temperature and the
- step 110 If, on the other hand, it is determined in step 110 that the engine temperature and / or the intake air temperature are above applicable threshold values, a hot start situation is concluded and the method proceeds to step 111.
- step 111 a hot start situation is concluded.
- a corresponding hot start bit can be set in the control unit, for example.
- Hot start situation and the internal combustion engine is started with the appropriate parameters for a hot start situation.
- step 107 If a hot start situation was identified in step 107, then the process proceeds to step 110 in which the engine temperature and intake air temperature values are compared with corresponding threshold values. It turns out that the engine temperature and intake air temperature values are below applicable
- FIG. 2 shows a representation of measured values when the method according to the invention is carried out.
- FIG. 2 shows speed and temperature measured values, which are shown over time.
- a characteristic curve 21 shows the speed curve nmot of an internal combustion engine. It can be seen that the speed 21 drops from a relatively high, constant speed value to 0 after a short time and then remains at 0. This point in time of the steep drop in speed corresponds to the shutdown of the internal combustion engine.
- characteristic curve 22 is the measured
- a characteristic curve 23 is drawn in FIG. 2, which corresponds to the measured temperature of a high-pressure pump in an internal combustion engine with direct petrol injection. Also shown is the temperature threshold 24, which corresponds to the shutdown temperature tmotab of the internal combustion engine, and the temperature threshold 25, which corresponds to the maximum temperature tmotmax during the control unit run-on.
- Hot start limit temperature for the high pressure pump 28 has exceeded.
- this critical temperature rise of the high-pressure pump that can be determined by the determined temperature gradient tmotgradmax and / or the determined maximum temperature stroke (tmotmax-tmotab). It has been shown in measurements that a hot start situation, caused by an overheated high pressure pump, can be reliably determined with the method according to the invention.
- control unit run-on required to carry out the method according to the invention moves in the range of approximately two minutes as shown in FIG. 2.
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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10043695 | 2000-09-04 | ||
DE10043695A DE10043695A1 (de) | 2000-09-04 | 2000-09-04 | Verfahren zum Bestimmen einer Heißstartsituation bei einer Brennkraftmaschine |
PCT/DE2001/003021 WO2002020966A1 (de) | 2000-09-04 | 2001-08-07 | Verfahren zum bestimmen einer heissstartsituation bei einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1317615A1 true EP1317615A1 (de) | 2003-06-11 |
EP1317615B1 EP1317615B1 (de) | 2006-06-14 |
Family
ID=7655032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01969227A Expired - Lifetime EP1317615B1 (de) | 2000-09-04 | 2001-08-07 | Verfahren zum bestimmen einer heissstartsituation bei einer brennkraftmaschine |
Country Status (7)
Country | Link |
---|---|
US (1) | US6874358B2 (de) |
EP (1) | EP1317615B1 (de) |
JP (1) | JP5150031B2 (de) |
BR (1) | BR0114037A (de) |
DE (2) | DE10043695A1 (de) |
ES (1) | ES2264987T3 (de) |
WO (1) | WO2002020966A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1703395A (zh) * | 2002-08-09 | 2005-11-30 | 特兰斯泰克制药公司 | 芳基和杂芳基化合物以及调节凝血的方法 |
DE10335401B4 (de) * | 2003-08-01 | 2012-10-04 | Robert Bosch Gmbh | Verfahren zum Starten einer Brennkraftmaschine |
JP4512070B2 (ja) * | 2006-08-28 | 2010-07-28 | トヨタ自動車株式会社 | 内燃機関の燃料噴射量制御装置 |
JP5007176B2 (ja) * | 2007-08-09 | 2012-08-22 | ボッシュ株式会社 | データ更新処理方法及び車両動作制御装置 |
DE102014000467A1 (de) * | 2014-01-16 | 2015-07-16 | Andreas Stihl Ag & Co. Kg | "Arbeitsgerät und Verfahren zur Ermittlung der Startbedingungen eines Arbeitsgerätes" |
CN107406050B (zh) * | 2015-03-31 | 2021-04-20 | 克朗设备公司 | 控制物料搬运车辆的功能***的方法 |
US20160361991A1 (en) * | 2015-06-12 | 2016-12-15 | Ford Global Technologies, Llc | Underbody air and thermal management system for a motor vehicle |
DE102018211116B4 (de) | 2018-07-05 | 2023-05-25 | Audi Ag | Verfahren zum Betreiben einer Antriebseinrichtung für ein Kraftfahrzeug sowie entsprechende Antriebseinrichtung |
US10908624B2 (en) * | 2018-11-09 | 2021-02-02 | Hamilton Sunstrand Corporation | Method for managing over-temperature excursions in a failed-fixed control system |
DE102021208943B4 (de) * | 2021-08-16 | 2024-01-11 | Zf Friedrichshafen Ag | Verfahren und Steuereinrichtung zum Steuern einer Fahrzeugeinrichtung |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4224913A (en) * | 1979-08-13 | 1980-09-30 | General Motors Corporation | Vehicle air-fuel controller having hot restart air/fuel ratio adjustment |
JPS56154133A (en) * | 1980-04-28 | 1981-11-28 | Nippon Denso Co Ltd | Correcting method of starting for electronic fuel jet system |
JP2503395B2 (ja) * | 1985-07-15 | 1996-06-05 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
JPS62131938A (ja) * | 1985-12-02 | 1987-06-15 | Nippon Denso Co Ltd | 内燃機関の空燃比制御装置 |
US4747386A (en) * | 1986-05-02 | 1988-05-31 | Toyota Jidosha Kabushiki Kaisha | Method and apparatus for augmenting fuel injection on hot restart of engine |
JP2678289B2 (ja) * | 1988-04-27 | 1997-11-17 | マツダ株式会社 | エンジンの燃料制御装置 |
ES2024001B3 (es) * | 1988-10-28 | 1992-02-16 | Siemens Ag | Procedimiento para realiza un arranque en caliente |
DE4039598B4 (de) | 1990-12-12 | 2008-11-27 | Robert Bosch Gmbh | Heißstartverfahren und -Vorrichtung für eine Brennkraftmaschine |
JPH05296084A (ja) * | 1992-04-16 | 1993-11-09 | Fuji Heavy Ind Ltd | エンジンの燃料噴射量制御方法 |
DE4224893B4 (de) * | 1992-07-28 | 2006-12-07 | Robert Bosch Gmbh | Verfahren zur Kraftstoffzumessung für eine Brennkraftmaschine in Verbindung mit einem Heißstart |
JPH06129322A (ja) * | 1992-10-15 | 1994-05-10 | Fuji Heavy Ind Ltd | 高圧噴射式エンジンの燃料圧力制御方法 |
JPH07229419A (ja) * | 1994-02-18 | 1995-08-29 | Toyota Motor Corp | 内燃機関の触媒暖機制御装置 |
JPH0814079A (ja) * | 1994-06-29 | 1996-01-16 | Nissan Motor Co Ltd | エンジンの燃料制御装置 |
DE4435419A1 (de) * | 1994-10-04 | 1996-04-11 | Bosch Gmbh Robert | Steuersystem für die Kraftstoffzumessung einer Brennkraftmaschine |
JPH11303693A (ja) * | 1998-04-17 | 1999-11-02 | Nissan Motor Co Ltd | 蒸発燃料処理装置の診断装置 |
US20020099482A1 (en) * | 2000-12-08 | 2002-07-25 | Reese Ronald A. | Engine warm-up model and thermostat rationality diagnostic |
US6732025B2 (en) * | 2000-12-08 | 2004-05-04 | Daimlerchrysler Corporation | Engine warm-up model and thermostat rationality diagnostic |
DE10119786A1 (de) * | 2001-04-23 | 2002-10-31 | Siemens Ag | Verfahren zum Bestimmen der Öltemperatur in einer Brennkraftmaschine |
-
2000
- 2000-09-04 DE DE10043695A patent/DE10043695A1/de not_active Withdrawn
-
2001
- 2001-08-07 DE DE50110169T patent/DE50110169D1/de not_active Expired - Lifetime
- 2001-08-07 EP EP01969227A patent/EP1317615B1/de not_active Expired - Lifetime
- 2001-08-07 ES ES01969227T patent/ES2264987T3/es not_active Expired - Lifetime
- 2001-08-07 JP JP2002525353A patent/JP5150031B2/ja not_active Expired - Fee Related
- 2001-08-07 BR BR0114037-0A patent/BR0114037A/pt active Pending
- 2001-08-07 US US10/362,638 patent/US6874358B2/en not_active Expired - Lifetime
- 2001-08-07 WO PCT/DE2001/003021 patent/WO2002020966A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO0220966A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004508487A (ja) | 2004-03-18 |
ES2264987T3 (es) | 2007-02-01 |
JP5150031B2 (ja) | 2013-02-20 |
US20040015288A1 (en) | 2004-01-22 |
EP1317615B1 (de) | 2006-06-14 |
US6874358B2 (en) | 2005-04-05 |
BR0114037A (pt) | 2003-07-22 |
WO2002020966A1 (de) | 2002-03-14 |
DE10043695A1 (de) | 2002-03-14 |
DE50110169D1 (de) | 2006-07-27 |
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