EP4562290A1 - Verfahren zum betreiben eines gasinjektors - Google Patents
Verfahren zum betreiben eines gasinjektorsInfo
- Publication number
- EP4562290A1 EP4562290A1 EP23726310.8A EP23726310A EP4562290A1 EP 4562290 A1 EP4562290 A1 EP 4562290A1 EP 23726310 A EP23726310 A EP 23726310A EP 4562290 A1 EP4562290 A1 EP 4562290A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- gas injector
- medium
- partial load
- boost
- 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.)
- Withdrawn
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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- 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
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
Definitions
- the present invention relates to a method for operating a gas injector and in particular to a method for shifting a period of time until a stroke stop of an armature of a magnetic actuator is reached based on a boost current duration.
- Gas injectors are known from the prior art in different designs. Due to the gaseous medium to be injected, gas injectors usually have relatively large opening strokes and correspondingly also relatively large closing strokes. However, this leads to relatively high kinetic energy, which can lead to wear, for example when opening a stroke stop for an armature. When closing, wear can occur on a sealing seat of the gas injector due to the high kinetic energies. These wear processes can lead to undesirable particle formation, which in an unfavorable case can lead to malfunctions in guides or other components of the gas injector.
- the method according to the invention for operating a gas injector for blowing a gaseous medium into a combustion chamber of an internal combustion engine with the features of claim 1 has the advantage that wear when opening on a stroke stop can be significantly reduced. This also results in a significantly reduced risk of particle formation during striking and thus a further reduced risk of these particles forming in unfavorable cases Can cause malfunctions, for example in guide components of the gas injector.
- the gas injector has a closing element, in particular a valve needle or the like, which is brought from a closed position into an open position by means of a magnetic actuator with an armature.
- a boost current for opening the closing element is applied to the magnetic actuator at the beginning of the opening process, then a pull-in current is applied to continue the opening process of the closing element up to a stroke stop, and then a holding current for keeping the closing element open is determined depending on a pressure level of a medium to be injected in the gas injector .
- the current for the three different opening phases of the closing element is thus determined depending on the pressure level of the medium to be injected.
- the boost current duration can therefore serve as a controlled variable depending on the pressure level of the gaseous medium in order to achieve the desired opening dynamics.
- the boost current, the starting current and the holding current can be selected variably.
- a shift in the time period until a stroke stop of the armature of the magnetic actuator is reached is carried out by regulating the boost current duration.
- an impact impulse of the armature at the stroke stop can be reduced.
- bouncers which can occur when the armature hits the stroke stop and influence the amount of gas to be blown in, can be prevented.
- Metering accuracy of the gas injector can thus be improved.
- the boost current duration is preferably shortened, which increases the time until the stroke stop is reached. This also reduces the speed of the armature when it hits the stroke stop.
- the pickup current duration when the boost current duration changes in the boost phase, also changes in a pickup phase.
- the method has a first current supply profile for a lower partial load of the internal combustion engine, a second current supply profile for a partial load of the internal combustion engine and a third current supply profile for an upper partial load and a full load of the internal combustion engine.
- the boost current duration therefore serves as a controlled variable in order to achieve the desired opening dynamics of the gas injector.
- the method preferably compares the actual time of the stroke stop tact with a target value tsoii of the stroke stop stored in a control device or the like. If the actual value deviates from the target value, an adjustment is then carried out by varying the boost current duration. For example, if the stroke stop occurs too early, the opening speed is reduced by reducing the boost current duration.
- the first current profile for the lower partial load is carried out in a pressure range of the medium to be injected of less than 12 x 10 5 Pa.
- the partial load is carried out in a pressure range of the medium to be injected in a range from 12 x 10 5 Pa to 18 x 10 5 Pa.
- the upper partial load and the full load are carried out in a pressure range of the medium to be injected of greater than 18 x 10 5 Pa and more preferably in a range of 40 to 50 x 10 5 Pa.
- the current levels for all three described current profiles meet the requirements that the current level in the lower partial load is greater than the current level at partial load and the current level of the partial load is greater than or equal to the current level at full load or upper partial load.
- the invention further relates to a control device which is set up to carry out the steps of the method according to the invention.
- the desired opening dynamics of the gas injector can be achieved with the help of the control unit by regulating the duration of the boost current by changing the time until the stroke stop is reached.
- the gas injector controlled by the control device therefore opens more slowly or quickly, with preferably a target/actual comparison of the energization duration to regulate the Duration until the stroke stop is reached. This means that opening bounces or the like can be avoided or reduced.
- the invention further relates to a computer program with a program code that carries out the steps of the method according to the invention when the computer program runs on a computer or a corresponding computing unit.
- Figure 1 is a schematic representation of two diagrams shown directly one above the other, the lower diagram showing a valve lift H over time t and the upper diagram showing the current I over time t, and
- Figure 2 is a longitudinal section through a gas injector, which is used
- FIG 2 shows an example of a gas injector 1 with a magnetic actuator.
- the magnetic actuator comprises a magnetic coil 3 for acting on an axially movable armature 2.
- the armature 2 can be brought into contact with a closing element 4, in particular a valve needle, in order to release an injection cross section at a sealing seat 5.
- the reference numeral 8 denotes a Gas injector reset element.
- the closing element 4 is held in the closed position shown in Figure 2 by means of a valve spring 7.
- Figure 1 shows schematically the method according to the invention for operating the gas injector for blowing a gaseous medium into a combustion chamber of an internal combustion engine.
- the closing element 4 for example a valve needle, is brought from a closed position (closed position at zero) into an open position (open position) by means of the magnetic actuator with an armature for blowing in the gaseous medium.
- the current profile has three phases A, B, C.
- a boost phase A at the beginning of the opening process is followed by a tightening phase B, which brings the gas injector into a completely open position.
- This is followed by a holding phase C, in which the gas injector is kept open with reduced magnetic force.
- the boost phase A provides an initial high opening force in order to overcome, in particular, adhesive forces and inertia forces of the closing element, which is in the closed state.
- the current I is shown over time t.
- a usual current profile for the gas injector is shown in a continuous line.
- a stroke stop HA is reached in the tightening phase B.
- the gas injector is opened to the maximum, so that a maximum injection cross section is released at a sealing seat of the gas injector.
- the opening dynamics of the gas injector are particularly important. What is particularly important here is the period in which the gas injector is completely open, i.e. how long the armature rests against the stroke stop HA, in which the gas injector is completely open.
- changes in the gas pressure in the gas injector can have a relatively large effect on the valve dynamics due to different requirements, for example during full load operation compared to lower partial load operation.
- the magnetic force requirement is low due to the supporting pneumatic forces of the medium to be injected under high pressure.
- the lack of pneumatic support must be compensated for by a higher magnetic force.
- the time period ti is now determined in which the closing element has carried out the maximum stroke HA and the armature is in contact with the stroke stop.
- This actual time duration ti is compared with a target time duration ts. If there is a deviation, as shown in the lower diagram in Figure 1, the actual time duration ti for reaching the stroke stop must be shifted in the direction of the target time duration ts (arrow X).
- the boost current duration is preferably over several Controls are gradually reduced until the setpoint and actual value are equal. Adaptation can thus preferably be achieved over several injection cycles.
- the time of the stroke stop depends directly on the opening speed of the closing element, there is a direct correlation between an impact speed of the armature on the stroke stop and the time of the stroke stop.
- the time of the stroke stop can therefore be carried out by comparing the target time duration ts with the actual time duration ti and, if a deviation is detected, it can be adjusted by varying the boost phase A.
- a master map stored, for example, in the control unit can be designed as a function of the system pressure of the medium to be injected once per injector generation and can be stored in the control unit.
- a method for operating a gas injector for blowing a gaseous medium into a combustion chamber of an internal combustion engine in which a time for the stroke stop and thus also an impact speed at the stroke stop can be determined by varying a boost current phase depending on a Gas pressure levels in the gas injector can be adjusted. This means that wear on the stroke stop can be reduced, so that the risk of particle formation during operation of the gas injector is significantly reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022207813.6A DE102022207813A1 (de) | 2022-07-28 | 2022-07-28 | Verfahren zum Betreiben eines Gasinjektors |
| PCT/EP2023/062268 WO2024022630A1 (de) | 2022-07-28 | 2023-05-09 | Verfahren zum betreiben eines gasinjektors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4562290A1 true EP4562290A1 (de) | 2025-06-04 |
Family
ID=86603861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23726310.8A Withdrawn EP4562290A1 (de) | 2022-07-28 | 2023-05-09 | Verfahren zum betreiben eines gasinjektors |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4562290A1 (de) |
| CN (1) | CN119968501A (de) |
| DE (1) | DE102022207813A1 (de) |
| WO (1) | WO2024022630A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2936422A1 (de) * | 1979-09-08 | 1981-03-26 | Daimler-Benz Aktiengesellschaft, 70567 Stuttgart | Mit gas betriebene brennkraftmaschine |
| US5367999A (en) * | 1993-04-15 | 1994-11-29 | Mesa Environmental Ventures Limited Partnership | Method and system for improved fuel system performance of a gaseous fuel engine |
| JP3707210B2 (ja) * | 1997-07-22 | 2005-10-19 | いすゞ自動車株式会社 | 燃料噴射制御装置 |
| EP2083159A1 (de) * | 2008-01-28 | 2009-07-29 | GM Global Technology Operations, Inc. | Verfahren zum Betreiben von Magnetspulen-Einspritzventilen für Verbrennungsmotoren |
| US8831857B2 (en) * | 2012-03-07 | 2014-09-09 | Ford Motor Company Of Australia Limited | Method and system for estimating fuel composition |
| EP2873842B1 (de) * | 2013-11-14 | 2018-02-28 | Delphi Automotive Systems Luxembourg SA | Steuerung der Betätigung eines Kraftstoffeinspritzventils |
-
2022
- 2022-07-28 DE DE102022207813.6A patent/DE102022207813A1/de active Pending
-
2023
- 2023-05-09 CN CN202380069668.9A patent/CN119968501A/zh active Pending
- 2023-05-09 WO PCT/EP2023/062268 patent/WO2024022630A1/de not_active Ceased
- 2023-05-09 EP EP23726310.8A patent/EP4562290A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN119968501A (zh) | 2025-05-09 |
| WO2024022630A1 (de) | 2024-02-01 |
| DE102022207813A1 (de) | 2024-02-08 |
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