EP1834073A1 - Verfahren zum betrieb einer brennkraftmaschine - Google Patents
Verfahren zum betrieb einer brennkraftmaschineInfo
- Publication number
- EP1834073A1 EP1834073A1 EP05811168A EP05811168A EP1834073A1 EP 1834073 A1 EP1834073 A1 EP 1834073A1 EP 05811168 A EP05811168 A EP 05811168A EP 05811168 A EP05811168 A EP 05811168A EP 1834073 A1 EP1834073 A1 EP 1834073A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- booster
- current
- value
- internal combustion
- combustion 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/2006—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost capacitor
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2017—Output circuits, e.g. for controlling currents in command coils using means for creating a boost current or using reference switching
-
- 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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
- F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
- F02D41/126—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off transitional corrections at the end of the cut-off period
-
- 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
- F02D41/3809—Common rail control systems
Definitions
- the present invention relates to an internal combustion engine and a method for its operation.
- a booster phase is required in which the flow through the high pressure injection valve is limited to values such as, for example, 12 A increases.
- the high current is generated by connecting the high-pressure injection valve to a booster capacitor which supplies energy under a voltage of e.g. Stores 65V and supplies it to the high pressure injector during the booster phase.
- the energy taken during the booster phase is re-supplied to the booster capacitor through a recharge circuit until the next booster phase.
- the size of this recharge circuit and the booster capacitor depends i.a. from the boost pressure required by the Hoch horrein- injection valve, which in turn depends on the need for opening the high-pressure injection valve booster.
- the height of the booster current is determined mainly by the maximum system pressure against which the high pressure injector must open and the static flow.
- the highest system pressure in normal operation with gasoline direct injection is achieved by opening a pressure tion valve determined.
- the opening pressure of the pressure relief valve is achieved in two cases of normal operation. The first case is the hot start, ie a start after a shutdown with pressure increase in the high pressure fuel system due to the heating of the
- the heating of the fuel in the fuel system is carried out by the heat transfer of a previously driven at full load and therefore strongly heated engine.
- the second case is the reinstatement of the injections after a coasting operation
- the object of the invention is therefore to provide a method which is a safe injection in the extreme cases reinstating the injections after a coasting operation and starting after a shutdown with pressure increase in the high-pressure fuel system due to
- a method for operating an internal combustion engine having an injection valve which is opened and closed electrically wherein a booster capacitor serves to increase the current intensity when the injection valve is opened, wherein the current profile of the booster terstrom in certain operating states of the internal combustion engine is switched from a standard value to an increased value and / or to a longer duration and reset to the default value and the standard duration upon termination of the specific operating state.
- the current profile of the booster current is preferably switched during a starting operation of the internal combustion engine and / or resuming the injection after a coasting operation from the default value to the increased value and / or from the standard duration of the booster phase to the extended booster phase and with termination of the starting process and after resets after a coasting operation to the default value or to the standard duration of the booster phase.
- the current profile of the booster current is preferably switched over to a generally longer duration by multiple booster, ie repeated switching on of the booster current for a short period of time.
- the opening pressure of the high-pressure injection valves is increased by the change of the booster current for the two cases mentioned above.
- the change in the booster current must be reversed quickly when lowering the fuel pressure to avoid a deep discharge of the booster capacitor.
- Booster current the discharge of the booster capacitor is minimal, so that further injections are ensured.
- the recharging circuit and the booster capacitor can be dimensioned for normal operation. Their oversizing for hot start and reinsertion after overrun fuel cutoff is not necessary.
- the opening force of the high-pressure injection valve can be increased (by, for example, increasing the static flow of the valve) without having to change the hardware. With a larger static flow can eg a charged variant of an engine series are operated and / or the power loss in the control unit, for example by reducing the injection window can be reduced. With greater static flow, the behavior of the start at low temperatures is also improved.
- the current profile is generally changed at startup, so that the opening of the high-pressure injection valves is ensured up to the opening pressure of the pressure relief valve.
- the current profile is reactivated for normal operation.
- the Nachladeschalt Vietnamese can sufficiently recharge the booster capacitor due to the low speed in the boot process with increased Boosterenergy pack the changed power profile. If the system pressure exceeds a certain pressure threshold in overrun mode, the current profile is changed for the subsequent restart phase. The first injections of the re-insertion phase will then require an increased booster energy demand.
- the switching between standard value and increased value preferably takes place within one injection cycle.
- the current profile of the booster current is preferably switched from the increased value to the standard value or from the extended duration to the standard duration when the rail pressure falls below a threshold.
- the current profile of the booster current is switched from the increased value to the standard value or from the extended duration to the standard duration when the number of injections with the increased value of the booster current exceeds a maximum value.
- the current profile of the booster current is switched from the increased value to the standard value or from the extended duration to the standard duration as soon as the voltage of the booster capacitor falls below a lower threshold.
- an internal combustion engine having an injection valve which can be opened and closed electrically, wherein a switchable booster capacitor serves to increase the current intensity when the injection valve is opened, characterized in that the current profile of the booster current rises from a standard value an increased value and / or switchable to a longer duration.
- the booster capacitor is preferably charged by a recharging circuit.
- Figure 1 is a schematic representation of a cylinder of an internal combustion engine with fuel supply system.
- Fig. 2 is a circuit diagram with control unit and injectors.
- FIG. 1 shows a schematic representation of a cylinder of an internal combustion engine with associated components of the fuel supply system. Shown is an internal combustion engine with direct injection (gasoline direct injection BDE) with a fuel tank 11 to which an electric fuel pump (EKP) 12, a fuel filter 13 and a low pressure regulator 14 are arranged. From the fuel tank 11, a fuel line 15 leads to a high-pressure pump 16. The high-pressure pump 16 is adjoined by a storage space 17. On the storage chamber 17 injection valves 18 are arranged, which are preferably assigned directly combustion chambers 26 of the internal combustion engine. In internal combustion engines with direct injection, each combustion chamber 26 is assigned at least one injection valve 18, but it is also possible here to provide a plurality of injection valves 18 for each combustion chamber 26.
- the fuel is conveyed by the electric fuel pump 12 from the fuel tank 11 via the fuel filter 13 and the fuel line 15 to the high-pressure pump 16.
- the fuel filter 13 has the task of removing foreign particles from the fuel.
- the fuel pressure in a low-pressure region of the fuel supply system is regulated to a predetermined value, which is generally of the order of about 4 to 5 bar.
- FIG. 1 shows, by way of example, a combustion chamber 26 of an internal combustion engine with direct injection; in general, the internal combustion engine has a plurality of cylinders, each with a combustion chamber 26.
- the internal combustion engine has a plurality of cylinders, each with a combustion chamber 26.
- At the combustion chamber 26 is at least one injection valve 18, we- at least one spark plug 24, at least one inlet valve 27, at least one outlet valve 28 is arranged.
- the combustion chamber is limited by a piston 29, which can slide up and down in the cylinder. Fresh air is sucked from an intake tract 36 into the combustion chamber 26 via the inlet valve 27.
- the injection valve 18 With the aid of the injection valve 18, the fuel is injected directly into the combustion chamber 26 of the internal combustion engine.
- With the spark plug 24, the fuel-air mixture is ignited. Due to the expansion of the ignited fuel-air mixture, the piston 29 is driven.
- the movement of the piston 29 is transmitted via a connecting rod 37 to a crankshaft 35.
- a segment disc 34 is arranged, which is scanned by a speed sensor 30.
- the speed sensor 30 generates a signal that characterizes the rotational movement of the crankshaft 35.
- the resulting during combustion exhaust gases pass through the exhaust valve 28 from the combustion chamber 26 to an exhaust pipe 33, in which a temperature sensor 31 and a lambda probe 32 are arranged. With the aid of the temperature sensor 31, the temperature and with the help of the lambda probe 32, the oxygen content of the exhaust gases is detected.
- a pressure sensor 21 and a pressure control valve 19 are connected to the storage space 17.
- the pressure control valve 19 is connected on the input side to the storage space 17.
- a return line 20 leads to the fuel line 15.
- a throttle valve 38 is arranged, the rotational position via a signal line 39 and an associated, not shown here, electric actuator by the controller 25 is adjustable.
- a quantity control valve in the fuel supply system 10 can also be used for men.
- the actual value of the fuel pressure in the storage space 17 is detected and fed to a control unit 25.
- the control unit 25 By the control unit 25, a drive signal is formed on the basis of the detected actual value of the fuel pressure with which the pressure control valve is actuated.
- the electrical actuation of the injection valves 18 is not shown in FIG. 1, as can be seen in FIG. 2.
- the various actuators and sensors are connected to the control unit 25 via control signal lines 22.
- various functions that serve to control the internal combustion engine implemented. In modern control units, these functions are programmed on a computer and then stored in a memory of the control unit 25.
- the stored in the memory functions are activated in response to the requirements of the internal combustion engine, in particular strict requirements are placed on the real-time capability of the control unit 25.
- a pure hardware realization of the control of the internal combustion engine is possible as an alternative to a software implementation.
- FIG. 2 the wiring of the injectors, these are referred to here as HPIV 11 and HPIV 12, shown with the control unit 25.
- HPIV 11 and HPIV 12 the wiring of the injectors, these are referred to here as HPIV 11 and HPIV 12, shown with the control unit 25.
- the indices of the three-fold outputs BATTX, BOOSTX, SPOX, SHSX, DLSX1 and DLSX2 are suppressed in the following diagram.
- the sketch shows an example of a four-cylinder engine with two banks, referred to here as Bank 1 and Bank 2, with only Bank 1 is shown in more detail.
- the control unit 25 here comprises an output stage 40 for triggering the injection valves HPIV 11 and HPIV 12 and a microcontroller 41 for controlling the functions of the control unit 25.
- the injection valves HPIV 11 and HPIV 12 are controlled such that the output stage 40 receives the signals BOOSTx_l to BOOSTx_3 to SBOx_l to SBOx_3 in the Switches on the booster phase and switches DLSX1_1 to DLSX1_3 on to drive HPIVIl to ground. As a result, a high current flows through HPIVIl.
- the necessary booster current is taken from the inputs BOOSTX_1 etc. to a booster capacitor BK.
- the booster capacitor BK is discharged during each opening operation of one of the injection valves and in the meantime via a Nachladedrossel NLD, which is connected to a battery voltage supply BS, recharged.
- a reload transistor NLT is used to control the reloading process.
- a higher current for opening the respective injection valve in the booster phase is necessary. This is achieved by an extension of the booster phase, be it by increasing the booster current level to be achieved or by multiple booster, ie the connection between BOOSTx_l to BOOSTx_3 and SBOx_l to SBOx_3 is switched on and off a few times.
- the power amplifier 40 switches the signals
- a lower current in the hold phase flows through HPIVIl.
- the output SHSX supplies a basic voltage for opening the valve.
- the booster current level can be adjusted stepwise by the microcontroller 31, for example between 8.5 and 12 amperes in 0.5 amp steps. If the booster current level is set so high that the booster voltage in the booster capacitor BK can not be maintained permanently by recharging, the booster capacitor is completely discharged within a few injection cycles. In order to avoid a discharge of the booster capacitor BK, the operation with a longer booster phase is limited to a few injections limited. For this purpose, the voltage of the booster capacitor BK can be used, on reaching a lower limit is switched back to normal operation. Switching to normal operation can also be done by falling below a pressure threshold. Alternatively, after a certain number of injections, wherein the number of the operating state of the internal combustion engine, such as speed, load and the like may be dependent, be switched to normal operation.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004063079A DE102004063079A1 (de) | 2004-12-28 | 2004-12-28 | Verfahren zum Betrieb einer Brennkraftmaschine |
PCT/EP2005/056033 WO2006069848A1 (de) | 2004-12-28 | 2005-11-17 | Verfahren zum betrieb einer brennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1834073A1 true EP1834073A1 (de) | 2007-09-19 |
EP1834073B1 EP1834073B1 (de) | 2009-06-03 |
Family
ID=35707268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05811168A Ceased EP1834073B1 (de) | 2004-12-28 | 2005-11-17 | Verfahren zum betrieb einer brennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US7497206B2 (de) |
EP (1) | EP1834073B1 (de) |
JP (1) | JP4373474B2 (de) |
DE (2) | DE102004063079A1 (de) |
WO (1) | WO2006069848A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014117921A1 (de) * | 2013-01-29 | 2014-08-07 | Mtu Friedrichshafen Gmbh | Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschine |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4483770B2 (ja) * | 2005-11-18 | 2010-06-16 | 株式会社デンソー | 電磁弁異常診断方法 |
DE102008012630A1 (de) | 2008-01-29 | 2009-07-30 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Schaltdruckberechnung bei einem Dosierventil |
JP4776651B2 (ja) * | 2008-03-28 | 2011-09-21 | 日立オートモティブシステムズ株式会社 | 内燃機関制御装置 |
WO2009144830A1 (ja) * | 2008-05-26 | 2009-12-03 | トヨタ自動車株式会社 | 内燃機関の始動装置 |
JP4815502B2 (ja) * | 2009-03-26 | 2011-11-16 | 日立オートモティブシステムズ株式会社 | 内燃機関の制御装置 |
DE102016208086A1 (de) * | 2016-05-11 | 2017-11-16 | Robert Bosch Gmbh | Verfahren zur Regelung eines Injektors zur Einspritzung von Kraftstoff |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4729056A (en) * | 1986-10-02 | 1988-03-01 | Motorola, Inc. | Solenoid driver control circuit with initial boost voltage |
US6031707A (en) * | 1998-02-23 | 2000-02-29 | Cummins Engine Company, Inc. | Method and apparatus for control of current rise time during multiple fuel injection events |
DE19813138A1 (de) * | 1998-03-25 | 1999-09-30 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers |
DE19833830A1 (de) * | 1998-07-28 | 2000-02-03 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung wenigstens eines Magnetventils |
JP3932474B2 (ja) * | 1999-07-28 | 2007-06-20 | 株式会社日立製作所 | 電磁式燃料噴射装置及び内燃機関 |
DE10014228A1 (de) * | 2000-03-22 | 2001-09-27 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Ansteuerung eines Kraftstoffeinspritzventils |
DE10140093A1 (de) * | 2001-08-16 | 2003-02-27 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Ansteuern eines Magnetventils |
JP2004092573A (ja) | 2002-09-03 | 2004-03-25 | Hitachi Ltd | 燃料噴射装置および制御方法 |
US7252072B2 (en) * | 2003-03-12 | 2007-08-07 | Cummins Inc. | Methods and systems of diagnosing fuel injection system error |
DE602004004664T2 (de) * | 2004-10-08 | 2007-11-08 | C.R.F. S.C.P.A. | Vorrichtung zum Steuern der Elektroeinspritzventile und Elektroventile einer Brennkraftmaschine und eine Methode dafür |
DE102004062020A1 (de) * | 2004-12-23 | 2006-07-13 | Robert Bosch Gmbh | Verfahren zum Betrieb einer Brennkraftmaschine |
-
2004
- 2004-12-28 DE DE102004063079A patent/DE102004063079A1/de not_active Withdrawn
-
2005
- 2005-11-17 WO PCT/EP2005/056033 patent/WO2006069848A1/de active Application Filing
- 2005-11-17 DE DE502005007438T patent/DE502005007438D1/de active Active
- 2005-11-17 EP EP05811168A patent/EP1834073B1/de not_active Ceased
- 2005-11-17 JP JP2007548793A patent/JP4373474B2/ja not_active Expired - Fee Related
- 2005-11-17 US US10/587,764 patent/US7497206B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006069848A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014117921A1 (de) * | 2013-01-29 | 2014-08-07 | Mtu Friedrichshafen Gmbh | Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE502005007438D1 (de) | 2009-07-16 |
EP1834073B1 (de) | 2009-06-03 |
JP4373474B2 (ja) | 2009-11-25 |
US7497206B2 (en) | 2009-03-03 |
DE102004063079A1 (de) | 2006-07-06 |
WO2006069848A1 (de) | 2006-07-06 |
US20070157906A1 (en) | 2007-07-12 |
JP2008525715A (ja) | 2008-07-17 |
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