EP3994348A1 - Method and system to determine the state of needle valve of a fuel injector - Google Patents
Method and system to determine the state of needle valve of a fuel injectorInfo
- Publication number
- EP3994348A1 EP3994348A1 EP20737395.2A EP20737395A EP3994348A1 EP 3994348 A1 EP3994348 A1 EP 3994348A1 EP 20737395 A EP20737395 A EP 20737395A EP 3994348 A1 EP3994348 A1 EP 3994348A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- valve
- injector
- high side
- current
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 18
- 230000004913 activation Effects 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011191 terminal modification Methods 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
-
- 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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/005—Measuring or detecting injection-valve lift, e.g. to determine injection timing
-
- 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
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- 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
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
-
- 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
- F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/22—Connectors or cables specially adapted for engine management applications
Definitions
- the present invention relates to fuel injectors and, more specifically, to fuel injectors which include a solenoid actuated control valve and a needle valve.
- the invention covers a system and method configured to determine the operational state of the needle valve.
- a fuel injector conventionally comprises a needle valve including a needle adapted to move away from a valve seat in an open position and then to contact the valve seat in a closed position.
- the needle valve In hydraulic fuel injectors the needle
- needle/pintle arrangement of the needle valve is controlled to open and close as a function of the pressure prevailing in a control chamber, which pressure is a function of the position of a solenoid actuated control valve.
- Fuel injectors are known in which a sensor is arranged on the injector or where some surfaces of the components of the injector body are provided with resistive coatings, so that an electric resistance measurement can be performed
- the wiring of the injector and harness is designed such that means are provided to determine when injector components come into and out of contact with each other.
- these components act like switches and can be used for feedback for a closed loop control of the injector e.g. to rectify behavior drift. Accuracy of the feedback measurement is key for the efficiency of the closed loop control.
- fuel injector typically therefore provide a“switch” signal for the ECU, provided via an extra wire, where a signal on the wire provides means to detect when two moving parts in the injector system are in or out of contact with each other.
- fuel injector are made from metallic (conductive
- a fuel injector including a solenoid controlled actuator, said solenoid controlled actuator including an a solenoid coil connected to high side and low side terminals, adapted such that activation of said actuator causes a valve needle of a needle valve to move away from a closed position where the valve needle tip is in contact with a valve seat, to an open position where the valve needle tip is away from said valve seat, said valve seat being connected to ground potential, and where said fuel injector defines a flow path for current to flow from a high side point of the inj ector via said needle and seat, to ground, when said needle valve is in the closed position, wherein said high side point is connected to the high side terminal of said solenoid via a first resistor.
- the fuel injector may be adapted such that current cannot flow from a high side point of the injector via said needle and seat, to ground, when said needle valve is in the open position,
- the injector may include a second resistor connected between a point between the first resistor and high side point, and ground.
- Said first and/or said second resistor may be arranged in a connector (header) of the fuel injector.
- a system including an ECU, and a fuel injector as claimed above, connected thereto via a high side wire and a low side wire, said high and low side wires connected to respective high and low sides of said solenoid.
- the system may include means to measure the current (I) flowing through said first wire to the high side terminal and also the current (II) flowing through the second wire from the low side terminal of said coil.
- Said ECU may include said means to measure the current (I) flowing through said first wire to the high side terminal and also the current (II) flowing through the second wire from the low side terminal of said coil.
- a method of determining the operational state of said needle valve in such a system comprising: a) measuring the current (I) flowing through said first wire to the high side terminal; and,
- steps a) and b) processing the results of steps a) and b) to determine said operational state.
- Step c) may determine the value of I-Il and determine the operational state based on said value. In step c) it may be determined that the needle valve is closed when said value is above a first threshold value and or second threshold value.
- step c) it may be determined that the needle is open when said value is below said first and/or second threshold value.
- step c) it may be determined that the needle is fully open when said value is above a third threshold value and partially open when below said third threshold value.
- FIG. 2a, b, and c shows a timeline of the operation of the valve of figure 1;
- FIG. 3 shows a fuel injector which can be used in conjunction with aspects of the invention
- FIG. 4 shows a system according to one example
- FIG. 5 shows various injector parameters of a system according to one example
- Figures 1 and 2 show an existing signal monitoring system to detect operation of a fuel injector.
- Figure 1 shows a simplified schematic representation of the lower portion of a fuel injector in three operational states A, B , C.
- the figure shows the distal portion of the fuel injector 1 showing the needle 2, and valve seat of providing a needle valve.
- the needle is controlled dependent on actuation of a solenoid to slide up and down along an axis to move the needle tip to and away from a valve seat, to a closed and open needle valve position/state, thus allowing fuel to be selectively dispensed.
- the fuel injector may be a direct injection injector where an (e.g. solenoid) actuator directly moves a pintle/needle up and down, or the injector may be hydraulically operated where the needle is moved up and down consequent to pressure changes of fuel due to activation of a flow control valve.
- wiring/switch means to detect when the tip of the needle reaches the valve seat in a closed position (position A) shown in Figure 1 to form a closed contact (and thus a closed contact of a signal switch) to prevent fuel entering a combustion chamber, and when it is away from the valve seat.
- position A closed position
- the connection between the needle tip and the valve seat acts like a first switch.
- When closed current can flow from a solenoid high side point via conductive components of the fuel injector via the needle to the seat and to ground
- FIG. 1 shows a timeline of the operation of the valve of figure 1 and shows plots a, b, c of the plots of the activation pulse sent to the solenoid actuator of the injector valve (top plot - a) ) the amount of the fuel dispensed (middle plot - b) ) and the state of the needle valve by virtue of the switch signal bottom plot c).
- the needle valve is initially in a closed state (state A needle of needle valve contacting valve seat) switch closed bottom contact) on activation of the solenoid actuator the needle moves away from the valve (state B) so moving ballistically from bottom position to top position where the valve is partially open (needle partially open no contact).
- the needle then reaches the top position making contact with the second switch means here the valve is fully open state C - needle fully open top contact.
- the valve starts to close and the needle move s down to a partially open position (state B) until it reaches the fully closed state (state A) where the needle tip reaches the seat and forms the contact of the first switch.
- the switch signals fed back to the ECU allows valuable information to be gleaned for the purpose of feedback control such as the duration the valve is in the fully open position.
- feedback control such as the duration the valve is in the fully open position.
- an extra wire which adds to the complexity e.g. of a wiring harness.
- a system to detect injector needle valve events or the operation state of the valve e.g. needle valve open or closed or even partially open
- the system uses the existing wires and harness and connectors e.g. in respect of the High Side and Low Side connections, as will be described hereinafter
- an injector where the needle /pintle arrangement is connected to the High Side voltage, which supplies voltage to the solenoid actuator, via contact of metal components.
- the valve seat is connected to ground. Effectively therefore this arrangement forms an inherent switch where there is a flow path for current from the High Side via the injector needle to ground when the needle tip contacts the valve seat (which is connected to ground), in a valve closed position. In other words current flows through this flow path to ground via the valve seat.
- Methodology and a system according to examples used in conjunction with such injectors means there does not need to be provided any extra wire as will become clear later.
- a method which allows this determination and in one aspect is provided a simple circuit arrangement which can be used in the injector header to facilitate the method easily and which does not require harness and connector terminal modification.
- the injector (body) construction itself does not need to be modified or specialized, and in some examples only the injector header or connector needs to be modified with the addition of simple circuitry.
- injector which can be used with aspects of the invention will be described. Such injectors are applicable to aspects of the invention described hereinafter and will be described now for completeness.
- the injector can be connected to the ECU by means of a connector head and harness.
- Figure 3 shows a fuel injector which can be used in conjunction with aspects of the invention and is fully described in patent application WO 2017/1672627.
- the figure shows a fuel injector for an internal combustion engine, comprising: an injection nozzle 12 with a body 16, in which a needle 14 is arranged that can be moved between a closed position, in which a first end 48 of the needle 14 rests on a seat 32 and seals injection openings 34 of the nozzle, and an open position, in which the first end 48 of the needle 14 is lifted from the seat 32 thereof in order to allow the injection; a control chamber 46 filled, during operation, with fuel so as to exert pressure on the second end 42 of the needle 14; a control valve 20 associated with the control chamber 46 allowing the fuel pressure in the control chamber 46 to be selectively varied and thus control an opening or closing movement of the needle 14, the control valve 20 being driven by an actuator; an upper guide 18 guiding the needle 14 axially by the second end 42 thereof; means for detecting the position of the needle 14, characterized in that the means for detecting the position of the needle comprise a first electric link in contact with the second end 42 of the needle so as to bring said needle to a predetermined electric potential; the
- novel methodology and circuitry is used in conjunction with e.g. the injectors described above which can determine the operational state of the valve (open or closed) by determining whether the switch formed from the needle tip and valve seat (and thus the needle valve) is open or closed.
- the system and methodology has and uses a standard configuration of e.g. a two wire harness and a common 2 -pin wire connector (which is compatible with a standard wiring hardness).
- Figure 4 shows a system according to one example.
- the figures shows schematically an ECU 200, or rather a simplified portion of the ECU for injector control purposes) on the left, and a solenoid controlled fuel injector 201 on the right, the injector which includes a needle valve.
- the ECU contains High Side Drive (HSD) circuitry connected to the HSD line /injector connection and Low Side Drive (LSD) circuitry connected to the LSD line and corresponding terminal of the injector.
- HSD High Side Drive
- LSD Low Side Drive
- the injector 201 is shown in a highly simplified form and generally comprises the main body of the fuel injector (fuel injector itself) and the connector or header portion of the fuel injector shown generally by the dotted box 206, inside of which is shown the circuitry in the connector portion (connector head) of the injector.
- the ECU is connected to the injector via a two wires
- the high side terminal is connected to the high side of the solenoid 202 and the low side terminal 212 is connected to the low side of the solenoid 202 of a solenoid controlled actuator of a fuel injector.
- the solenoid is found within the box 206 but the skilled person would be readily aware the solenoid is part of the man body of the injector and is shown in the box for clarity.
- the main fuel injector is shown with the“switch” 203 described above which is the switch that represents in a closed position, contact between the needle tip (in the needle valve closed position) and the valve seat in the needle valve closed position; the switch in the open position represents the state where the needle tip is away from the valve seat (needle valve open position).
- Box 204 shows the mechanical position of valve needle tip and seat representing the switch.
- the fuel injector is controlled by the ECU.
- the (Injector Closed Loop) circuit inside the injector is such to provide i.e. current flow path when effective switch 203 is closed is sown by line 205.
- Reference numeral 206 shows circuitry of the arrangement which may be embodied i.e. provided in the injector head/header connector portion/module.
- the fuel injector is solenoid controlled and thus includes a solenoid actuator as mentioned 202 with injector coil which is controlled by the ECU.
- the ECU has a high side with High Side Drive circuitry 210 and a low side with low Side drive circuitry 230, and corresponding connection/terminals with the injector (head) . It should be appreciated that some or all of the drive circuitry may be outside the ECU i.e. between the ECU and the injector. Thus the injector connection to the ECU/drive circuitry is via two connections/terminals.
- some simple circuitry which assists implementation of methodology.
- This is provided on the injector side e.g. in the injector connector or head, a resistor R1 electrically connected between the high side voltage terminal 211/high side terminal of the coil of the solenoid actuator, and a contact point 207 which is portion of the main fuel injector (body) which is connected to the high side voltage (terminal) (via resistor Rl).
- the point 207 is effectively a (high side) portion/component of the flow path.
- Contact point 207 may be any point /component of the fuel injector which is in electrical contact e.g. via other conductive components to the needle or needle pintle arrangement.
- a resistor R2 provided between a first point (between the high side connection of the flow path/point (207) and the resistor Rl), and ground. R2 is added to the circuitry to limit the current from the high side to ground via the needle seat area, which is undesirable and this current would otherwise be high and would e.g. cause an electro-erosion effect.
- Contact point may be any portion of the fuel injector which is continually (in any operational position/state of the needle valve) in electrical contact with the valve (and generally thus as the same potential thereto)
- the High Side line is driven high according to an activation profile and current flows through the injector coil to open the control valve.
- the needle of the needle valve will consequently ascend and the needle tip will lift off the valve seat to an open position.
- the needle may reach its top stop in a fully open position of the needle valve. During the opening period there is little or minimal current flowing from the High Side to ground.
- the needle After activation the needle will descend until the tip thereof reaches the valve seat to a needle valve closed position.
- current can flow from the high side through injector component (e.g. though the solenoid bobbin to ground via the valve seat.
- injector component e.g. though the solenoid bobbin to ground via the valve seat.
- the ECU is provided with means to measure the current to the injector through the high side connection and means to measure the current through the low side connection. In simple methodology according to example, analysis of these two currents can give information of the state of the needle valve (open or closed, and in some cases whether the valve is fully open or partially open.).
- the ECU In the ECU are means to measure the current (I) from the High Side Drive to the High Side of the coli, 208, and means 209 to measure the current flowing through the solenoid coil which is that flowing along the LSD harness wire (II) from the coil.
- the current through the low side II is the current through the coil.
- the current through the high side connection I is equal to the current through the injector coil II plus current through R1. Where there is resistor R2, the current through the high side connection I is equal to: the current through the injector coil II plus current through the resistor R2 (13) plus current flowing through the injector along flow path 205 from point 207 the ground (12) , 12 will be zero or close to zero when the switch is open and thus the needle valve in an open position when the needle tip is away from the valve seat.
- 12 1-11-13
- 12 +13 1- II .
- I-E I2+I3 is determined e.g. measured in the ECU (I and R are measured) and used to determine the state of the needle valve i.e. the effective switch state (open or closed when the needle tip is out of and in contact with, the valve seat respectively). I3 may be known.
- Figure 5 shows various injector parameters along the same timeline and shows (a) plots of the activation pulse sent from the ECU to the injector, (b) the quantity of fuel injected, c) the injector (closed loop) switch state (in terms of voltage between the needle/injector portion connected to the high side terminal, and valve seat/ground).
- the bottom plot shows the corresponding value of I-Il (12 + 13) respectively.
- the activation pulse comprises pre (main injection) injection pulses 501, followed by a main injection (longer) pulse 502, followed by a post (main injection) injection pulse 503. Consequent to each pulse the solenoid is actuated to open the needle valve to allow fuel to be injected into a combustion space as shown in (b).
- the leakage current can often be different (e.g. higher) than in the partially open state where the needle is in ballistic mode and does not contact the upper surface/stop .
- the plot of I-Il can in circumstances with careful calibration or a sensitive accurate current measuring, also provide data on whether the needle valve is fully open, partially open or closed.
- Figure 6 shows a portion similar to the plot of Figure 5(d) showing the value of I- II (12+13) when the needle valve moves from a closed positon to a partially open to fully open.
- aspects of the new methodology can be used with the existing simple architecture comprising 2 -wires or can be used in arrangements which uses a 3 rd wire where an effective additional switch is provided in the injector such that feedback is obtained by the ECU when the needle reaches it top position when the valve is fully open to detect full lift. So in examples, there is no need for extra wires between the injector and ECU and the position of the needle valve open or closed is determined/inferred solely by the ECU and measurements within the ECU
- the system does not need an extra wire and the harness and injector does not have to be substantially modified to provide the extra switch signal. So in examples there is no need for extra wires between the injector and ECU and the position of the needle valve open or closed is determined/inferred solely by the ECU and measurements within the ECU.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1909434.1A GB2585196B (en) | 2019-07-01 | 2019-07-01 | Method and system to determine the state of needle valve of a fuel injector |
PCT/EP2020/068476 WO2021001409A1 (en) | 2019-07-01 | 2020-07-01 | Method and system to determine the state of needle valve of a fuel injector |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3994348A1 true EP3994348A1 (en) | 2022-05-11 |
Family
ID=67540025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20737395.2A Pending EP3994348A1 (en) | 2019-07-01 | 2020-07-01 | Method and system to determine the state of needle valve of a fuel injector |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3994348A1 (en) |
GB (1) | GB2585196B (en) |
WO (1) | WO2021001409A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10338489B3 (en) * | 2003-08-21 | 2004-12-16 | Siemens Ag | Injection valve with capacitive valve lift sensor for combustion engine has voltage connection for circuit made via insulated conductor fed in axial bore in injector body, connected to contact spring |
DE102005002796B4 (en) * | 2005-01-20 | 2009-01-08 | Continental Automotive Gmbh | valve device |
DE102015104107B4 (en) * | 2014-03-20 | 2019-12-05 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | ACTUATOR WITH INTEGRATED DRIVER |
GB201513222D0 (en) * | 2015-07-28 | 2015-09-09 | Delphi Int Operations Lux Srl | Method to determine the coking of a fuel injector |
RU2740840C2 (en) | 2016-03-21 | 2021-01-21 | Конинклейке Филипс Н.В. | Method for recognizing a defibrillator operating state, a monitoring device and a defibrillator status notification system |
DE102017116379A1 (en) * | 2017-07-20 | 2019-01-24 | Liebherr-Components Deggendorf Gmbh | Device for condition detection of an injector |
DE202018100337U1 (en) * | 2018-01-22 | 2019-04-24 | Liebherr-Components Deggendorf Gmbh | Injector and device for detecting the state of such an injector |
-
2019
- 2019-07-01 GB GB1909434.1A patent/GB2585196B/en active Active
-
2020
- 2020-07-01 WO PCT/EP2020/068476 patent/WO2021001409A1/en unknown
- 2020-07-01 EP EP20737395.2A patent/EP3994348A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB201909434D0 (en) | 2019-08-14 |
GB2585196A (en) | 2021-01-06 |
WO2021001409A1 (en) | 2021-01-07 |
GB2585196B (en) | 2021-10-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9328707B2 (en) | Fuel injector | |
KR102268855B1 (en) | fuel injector | |
US7055762B2 (en) | Injection valve with a capacitive valve lift sensor | |
KR101998015B1 (en) | Determination of the pressure in the fuel injection valve | |
US20180372018A1 (en) | Fuel injection nozzle | |
RU2109977C1 (en) | Liquid flow control valve | |
US11555464B2 (en) | Injector, and device for detecting the condition of such an injector | |
US7258109B2 (en) | Method for operating a fuel injection device, especially for a motor vehicle | |
EP2146080A1 (en) | Indication of solenoid temperature change | |
EP3124777A1 (en) | Method to determine the coking of a fuel injector | |
EP3420217B1 (en) | Fuel injector for a combustion engine | |
US10989134B2 (en) | Method for operating a fuel injection system of a motor vehicle and fuel injection system | |
EP3994348A1 (en) | Method and system to determine the state of needle valve of a fuel injector | |
KR101858300B1 (en) | Fuel injection valve | |
CN111247323B (en) | Method for determining needle opening delay of fuel injector | |
US11421638B2 (en) | Injector | |
EP3526460B1 (en) | Method and apparatus to detect impedance of contact between injector valve moving parts | |
CN107810319B (en) | Method for monitoring the operating operation of a piezo injector | |
US20230160353A1 (en) | Device for detecting the state of a fuel injector | |
US20060151628A1 (en) | Piezo sensor system for detecting the needle lift of a nozzle of a common rail injector | |
JP7491524B2 (en) | Method for monitoring a common rail injector for a heavy-duty diesel dual fuel engine and injector adapted to implement the monitoring method - Patents.com | |
GB2570663A (en) | Fuel Injector For An Internal Combustion Engine | |
WO2019030021A1 (en) | Circuit arrangement for fuel injector switch | |
EP2930346A1 (en) | Method for the control and diagnosis regarding the operation a fuel injector |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20211222 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230327 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20240130 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PHINIA DELPHI LUXEMBOURG SARL |