EP3507474A1 - Verfahren zur ansteuerung eines elektromagnetisch ansteuerbaren einlassventils - Google Patents
Verfahren zur ansteuerung eines elektromagnetisch ansteuerbaren einlassventilsInfo
- Publication number
- EP3507474A1 EP3507474A1 EP17751365.2A EP17751365A EP3507474A1 EP 3507474 A1 EP3507474 A1 EP 3507474A1 EP 17751365 A EP17751365 A EP 17751365A EP 3507474 A1 EP3507474 A1 EP 3507474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current level
- inlet valve
- energization
- closing
- pump
- 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
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000446 fuel Substances 0.000 claims abstract description 38
- 238000004590 computer program Methods 0.000 claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F02D41/02—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
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
-
- 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
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2044—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using pre-magnetisation or post-magnetisation of the 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2065—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control being related to the coil temperature
-
- 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
- F02D2200/0606—Fuel temperature
Definitions
- the invention relates to a method for controlling an electromagnetically controllable inlet valve having the features of the preamble of claim 1. Furthermore, the invention relates to a computer program for carrying out the method.
- the inlet valve can be controlled in such a way that a metering of the fuel to realize a full or partial filling of the pump working space is possible.
- Inlet valve is effected by means of a solenoid, which is energized to open the inlet valve.
- the control is preferably carried out as a function of the
- the published patent application DE 10 2013 215 909 A1 also discloses a method for controlling and regulating a high-pressure fuel pump provided with an inlet valve with an electromagnetic actuator, in which the inlet valve is designed as a normally open valve. That is, the electromagnetic actuator is energized to close the inlet valve.
- the energization is carried out in dependence on the current position of a pump piston of the high-pressure fuel pump, provided that a corresponding position information is available. Is this not the case, for example, a quick restart of the
- the method thus ensures the delivery of fuel from the first delivery stroke of the high-pressure fuel pump from the start of the internal combustion engine.
- the predetermined energization strategy can provide an energization at intervals or a continuous current, with a flow control during continuous power is not possible.
- the energization at intervals also has the advantage that in comparison to the continuous power, the power loss can be kept low.
- Inlet valves of the aforementioned type are sensitive to particles contained in the fuel. In general, therefore, the intake valve is preceded by a sieve to retain such particles. At low outside temperatures or low fuel temperatures, paraffin precipitates in the fuel can cause the screen to become clogged. As a result, it may too
- the present invention has for its object to provide a method for controlling an electromagnetically controllable intake valve, which allows a reliable flow control even at low outdoor or fuel temperatures. In this way, rail pressure deviations and associated failures of the internal combustion engine should be avoided.
- a magnetic coil is energized to close the inlet valve.
- the inlet valve is designed as a normally open valve. The energization takes place in dependence on the piston stroke of a pump piston of the high-pressure fuel pump.
- a power loss is introduced via the energization of the magnetic coil, which is used to heat the fuel.
- the heating of the fuel reduces the risk of paraffin precipitation and thus the risk that a sieve upstream of the inlet valve becomes clogged. Because depending on the operating point, a part of the high-pressure element space previously supplied via the inlet valve fuel amount is pushed out again, so that in this way heated fuel back into the inlet area and thus passes in front of the screen.
- the ejected heated fuel prevents the sieve from becoming clogged due to paraffin precipitations, so that even at low outside temperatures a reliable quantity control via the inlet valve is ensured. At the same time, this reduces the risk of non-start or failure of the system
- Internal combustion engine which is supplied with fuel by means of the high-pressure fuel pump.
- the power loss for heating the fuel is deliberately introduced by varying an energization strategy that serves to control the intake valve.
- the opening and closing behavior of the intake valve remains preferred
- an electromagnetically controllable inlet valve is activated once during a delivery cycle of a high-pressure fuel pump.
- Energizing parameters are usually chosen so that with the
- the Energization profile A has a short starting current phase a for closing the inlet valve and a subsequent holding current phase b, in which the current level is lowered.
- the holding current phase b is followed by a phase c, in which the current supply is interrupted or the inlet valve is opened.
- TDC top dead center
- an energization profile is selected which requires an increased energy input in order to introduce the power loss.
- the energization duration can be extended and / or the current level can be increased.
- the time intervals of successive energization phases can be shortened so that the electromagnetically controllable inlet valve is activated more than once during a delivery cycle of the high-pressure fuel pump.
- the energization of the magnetic coil is continued after the inlet valve has been closed at an unchanged high current level or at a reduced current level over a specific period of time.
- the high current level may correspond to the current level for closing the inlet valve (starting current level), for example, by not switching to a reduced current level (holding current level) after closing the inlet valve.
- the current level can be lowered, for example, by switching to holding current.
- the continuation of the energization at the same or lowered current level takes place within a delivery cycle of the high-pressure fuel pump. This means that the energization phase is interrupted at least once within a delivery cycle in order to allow a flow control via the inlet valve.
- the energization of the solenoid is terminated before the
- Pump piston of the fuel high-pressure pump has reached a bottom dead center. This ensures that the inlet valve remains open for volume control during the suction phase.
- the energization of the solenoid can be extended beyond the bottom dead center of the pump piston out when a small flow rate is required.
- the energization of the solenoid is continued after closing the inlet valve at intervals. That is, during a delivery cycle of the high pressure fuel pump, multiple consecutive bursts are set.
- the energization of the individual surges is chosen to be sufficiently short, so that the inlet valve, in particular during the delivery stroke of the pump piston, is not actuated.
- Bestromungsdauer be limited, since with increasing speed, the closing forces from the hydraulic increase.
- the energization time is chosen so short that closing is prevented in all speed ranges.
- the energization duration can be varied with the speed.
- the current level and / or the energization duration is or are accordingly varied as a function of the rotational speed.
- the solenoid be energized at a holding current level or an underlying current level before closing the inlet valve.
- the closing may then be started from the holding current level or the lower current level by increasing the current level to a starting current level.
- the energization can be maximized without the risk of accidental closing of the inlet valve.
- the current level is briefly raised.
- the current level can be briefly lowered before lifting. In this way, the
- the current level be varied with the aid of a boost function.
- the boost function allows voltages that are above the normal battery voltage, so that a special ders fast switching between different current levels and a particularly fast start and / or termination of a Bestromungsphase are possible. In addition, higher power losses can be realized.
- the method according to the invention is preferably carried out for a limited time, and in particular when there is the risk of clogging of a sieve upstream of the inlet valve. Therefore, it is preferable to carry out the method when it falls below a predetermined temperature threshold, during a cold start and / or when exceeding a predetermined temperature threshold
- the temperature and / or the viscosity of the fuel are therefore further preferably monitored.
- the method is executed in accordance with a program code of a computer program running on a control unit.
- the program code is stored for this purpose in the control unit or stored on a separate storage medium.
- In the control unit can also be evaluated measurement data that allow conclusions about the temperature and / or viscosity of the fuel to automatically start the execution of the method when falling below or exceeding a predetermined limit.
- Control unit stored or stored on a separate storage medium.
- Fig. 1 is a diagram illustrating a known Bestromungsprofils
- Fig. 2 is a diagram for illustrating inventive energization profiles. Detailed description of the drawings
- Fig. 1 known Bestromungsprofil A is characterized by a comparatively short energizing duration, which consists of the energization phases a and b.
- the intake valve is energized to close only once per delivery cycle, and shortly before the pump piston reaches top dead center (TDC).
- FIG. 2 shows three different energizing profiles B-D according to the invention.
- the Bestromungsprofil B differs from the known Bestromungsprofil A of FIG. 1, characterized in that the energization is extended. In addition, the flow will continue at a consistently high level. In this way, a power loss is introduced, which is useful for heating the fuel.
- the Bestromungsprofil C has a maximized Bestromungsdauer, wherein the current level compared to the profile B is reduced. Only to close the inlet valve, the current level is briefly raised.
- the energizing profile D is characterized by several successive brief surges or energizing intervals, which in total also lead to an extension of the energization duration.
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 |
---|---|---|---|
DE102016216343.4A DE102016216343A1 (de) | 2016-08-30 | 2016-08-30 | Verfahren zur Ansteuerung eines elektromagnetisch ansteuerbaren Einlassventils |
PCT/EP2017/069854 WO2018041534A1 (de) | 2016-08-30 | 2017-08-04 | Verfahren zur ansteuerung eines elektromagnetisch ansteuerbaren einlassventils |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3507474A1 true EP3507474A1 (de) | 2019-07-10 |
EP3507474B1 EP3507474B1 (de) | 2022-07-27 |
Family
ID=59581918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17751365.2A Active EP3507474B1 (de) | 2016-08-30 | 2017-08-04 | Verfahren zur ansteuerung eines elektromagnetisch ansteuerbaren einlassventils |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3507474B1 (de) |
DE (1) | DE102016216343A1 (de) |
WO (1) | WO2018041534A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018211937A1 (de) * | 2018-07-18 | 2020-01-23 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Kraftstoffzumesssystems |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1217256B (it) * | 1987-08-25 | 1990-03-22 | Weber Srl | Pompa di iniezione per impianti di iniezione del combustibile con iniettori comandati per motori a ciclo diesel |
DE102008042265A1 (de) * | 2008-09-22 | 2010-04-08 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Einspritzventils |
US8694230B2 (en) * | 2009-05-19 | 2014-04-08 | Sturman Digital Systems, Llc | Fuel systems and methods for cold environments |
DE102010027745A1 (de) | 2010-04-14 | 2011-10-20 | Robert Bosch Gmbh | Hochdruckpumpe |
DE102011106824A1 (de) * | 2011-07-06 | 2013-01-10 | Volkswagen Aktiengesellschaft | Verfahren zum Betrieb einer elektronisch kommutierten Kraftstoffpumpe |
JP5639970B2 (ja) * | 2011-08-03 | 2014-12-10 | 日立オートモティブシステムズ株式会社 | 電磁弁の制御方法、高圧燃料供給ポンプの電磁吸入弁の制御方法および電磁吸入弁の電磁駆動機構の制御装置 |
DE102011084194A1 (de) * | 2011-10-10 | 2013-04-11 | Robert Bosch Gmbh | Verfahren und Recheneinheit zum Betrieb einer Zumesseinheit eines Common-Rail-Kraftstoffeinspritzsystems und Recheneinheit |
JP6044366B2 (ja) * | 2013-01-30 | 2016-12-14 | 株式会社デンソー | 高圧ポンプの制御装置 |
DE102013215909A1 (de) | 2013-08-12 | 2015-02-12 | Robert Bosch Gmbh | Verfahren zur Steuerung und Regelung einer mit einem Einlassventil mit elektromagnetischem Aktor versehenen Hochdruckkraftstoffpumpe einer Verbrennungskraftmaschine |
DE102013221320A1 (de) * | 2013-10-21 | 2015-04-23 | Robert Bosch Gmbh | Verfahren zur Sicherstellung des Kaltstarts eines mit Ethanol-Kraftstoff betriebenen Ottomotors |
DE102014211942A1 (de) * | 2014-06-23 | 2015-12-24 | Robert Bosch Gmbh | Mengenproportionalventil mit beheizbarem Filterelement |
-
2016
- 2016-08-30 DE DE102016216343.4A patent/DE102016216343A1/de not_active Withdrawn
-
2017
- 2017-08-04 WO PCT/EP2017/069854 patent/WO2018041534A1/de unknown
- 2017-08-04 EP EP17751365.2A patent/EP3507474B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3507474B1 (de) | 2022-07-27 |
DE102016216343A1 (de) | 2018-03-01 |
WO2018041534A1 (de) | 2018-03-08 |
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