EP3526458A1 - Flap device for an internal combustion engine - Google Patents
Flap device for an internal combustion engineInfo
- Publication number
- EP3526458A1 EP3526458A1 EP17777244.9A EP17777244A EP3526458A1 EP 3526458 A1 EP3526458 A1 EP 3526458A1 EP 17777244 A EP17777244 A EP 17777244A EP 3526458 A1 EP3526458 A1 EP 3526458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flap
- flow
- internal combustion
- housing
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1005—Details of the flap
- F02D9/101—Special flap shapes, ribs, bores or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1005—Details of the flap
- F02D9/101—Special flap shapes, ribs, bores or the like
- F02D9/1015—Details of the edge of the flap, e.g. for lowering flow noise or improving flow sealing in closed flap position
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
-
- 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
- F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
- F02M9/08—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position having throttling valves rotatably mounted in the passage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/221—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves specially adapted operating means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/222—Shaping of the valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
-
- 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
- F02D2400/18—Packaging of the electronic circuit in a casing
Definitions
- the invention relates to a flap device for an internal combustion engine having a flow housing in which a flow-through channel is formed, which is bounded by a housing wall, a flap body which is rotatably mounted on a shaft and mounted on the shaft in the flow housing, an actuator, via the the shaft is actuated and a pressure measuring point in a channel portion of the flow housing, which is passable by the valve body during its rotation and is arranged on the circumferential direction of the housing wall of the flow housing viewed from the shaft portion of the flow housing.
- the swept by the flap body pivot portion is the axial portion of the channel whose cross sections are contacted to the channel axis in any position of the flap of a flap portion.
- the area remote from the shaft in the circumferential direction of the housing wall is the area of the housing wall which is arranged offset by 90 ° to the shaft axis in the case of a centrally mounted flap.
- flap devices are used in particular in internal combustion engines of motor vehicles and serve there, for example, to regulate a fresh air flow for feeding into the cylinder or for controlling a recirculated to the intake manifold exhaust stream to reduce pollutants.
- air mass meter which operate on the principle of hot film manometry or to determine the gas flow via a differential pressure measurement.
- DE 102006001032 A1 discloses a volume flow measurement in the region of a throttle valve arranged in an air duct, in which a differential pressure between a pressure measuring point upstream of the flap body and a pressure measuring point is measured, which in an axial section of the Channel is arranged, which is traversed during the rotation of the valve body.
- a differential pressure between a pressure measuring point upstream of the flap body and a pressure measuring point is measured, which in an axial section of the Channel is arranged, which is traversed during the rotation of the valve body.
- the pressure measuring point directed flap surface is curved in such a way that in each rotational position of the valve body, a tangent to the position of the curved flap surface, the shortest distance to the opposite wall surface is laid, runs parallel to the opposite wall surface of the flow housing, it is achieved that a directed, straight flow without turbulence along the pressure measuring point is achieved, whereby the measurement results are significantly improved.
- the tangent which is placed at the position of the curved flap surface having the shortest distance to the opposite wall surface, arranged in each rotational position of the valve body in a same axial flow cross-section of the channel in the pivot region of the valve body, whereby this narrowest cross-section always in the same Flow cross-section is arranged, whereby a very uniform flow is maintained even during the rotation of the valve body.
- the axial flow cross-section of the channel, in which the tangent, which is placed at the position of the curved flap surface, which has the shortest distance to the opposite wall surface is arranged in each rotational position of the valve body, immediately downstream of the pressure measuring point so that the parallelism of the gas flows is also reached immediately behind the pressure measuring point, thereby creating a directed rectilinear flow through which very accurate pressure measurements are possible.
- the flap body has a flap wing on which the curved flap surface is formed and which abuts in the closed state of the flap device immediately downstream of the pressure measuring point on the wall surface of the flow housing at an abutment point on the wall surface of the flow housing and upon rotation of the flap body of the channel closing position away from the pressure measuring point.
- the pressure measuring point lies even in the case of small flap openings in the region through which flow is maximized, specifically in a narrowed cross section, but without turbulence arising through the flap body.
- a directional flow of high velocity is formed in this area, whereby the pressure measurement can be very accurate. This reduces measurement errors and a Ensures reliable pressure measurement over the entire operating range of the flap over a long period of time.
- the more complex shape of the flap is limited to the necessary for the exact measurements section.
- the pressure measuring point is preferably formed downstream of the bearing points of the shaft on the flow housing, so that the flap is arranged obliquely in the channel in the closed state. This simplifies the formation of the curvature for generating the directed flow. With small opening angles so that demolition edges can be prevented.
- the curved flap surface along the shaft is formed only in the central region of the flap wing, so that material is saved, since the expansion of the curvature is reduced. Nevertheless, the parallelism in the area of the pressure measuring point and the resulting good results are obtained.
- the flap device has a first channel section with a first flow cross-section, a second channel section in which the flow cross-section decreases and downstream of the second channel section a third channel section in which the channel with reduced flow cross-section continues, the shaft in the third Channel section is mounted and the pressure measuring point is formed in the third channel section.
- a further pressure measuring point is arranged in the first channel section in a preferred embodiment, wherein the pressure measuring points are formed as openings in the housing, which are fluidly connected to at least one pressure sensor. Via the openings, the pressure can easily be directed into a housing or directly to two individual pressure sensors or a differential pressure sensor, via which exactly the volume flows from the differential pressures can be determined.
- a respective pressure sensor is arranged in each of the two openings of the flow housing. This facilitates the assembly. Also, a leak-free closure of the openings is easy to produce.
- the at least one pressure sensor is a differential pressure sensor, which allows the measurement and calculation of a mass flow with only one component.
- a control electronics of the actuator is electrically coupled to the at least one pressure sensor. Accordingly, the activation of the actuator and thus of the flap can take place directly as a function of the measured values of the at least one pressure sensor, whereby, for example, additional position sensors on the actuator can be completely dispensed with since direct feedback can be carried out via the desired volume flow to be conveyed.
- an evaluation unit for calculating a gas flow from the measured values of the at least one Pressure sensor with the at least one pressure sensor and the drive electronics of the actuator is electrically coupled.
- an exact mass flow can first be determined from the pressure measured values and optionally other additional measured values, such as the temperature, for example, which can be compared with the actual value in the control of the valve to the actuator for comparison with the desired value.
- a regulation takes place in direct dependence of the relevant for the engine control mass flow as a control variable.
- the actuation of the actuator is thus advantageously carried out as a function of the measured values of the at least one pressure sensor.
- a particularly simple assembly by which a pre-assembly of the entire flap device is made possible, results when the actuator electronics of the actuator and the at least one pressure sensor are arranged in an actuator housing, which is fastened to the flow housing or manufactured in one piece therewith.
- the entire electronics are arranged in a common housing and the units can be directly coupled together or can be formed on a common board.
- a flap device which provides accurate measurement values for a mass flow or volume flow to be determined and at the same time is small and compact in design and can be pre-assembled. This is achieved by a directional layer flow without turbulence and vortices, whereby the pressure sensors deliver much more accurate readings. The number of parts and the necessary assembly steps are reduced in comparison to known designs. A regulation of the flap can thus be carried out as a function of a calculated from the pressure difference volume or mass flow, without having to use additional sensors. This allows a direct, faster and more accurate control of the respectively required by the engine control gas flows.
- FIG. 1 shows a side view of the flap device according to the invention in a sectional representation.
- FIG. 2 shows the flap device according to the invention from FIG. 1 from an opposite side in a perspective view.
- FIG. 3 shows a perspective view of the flap body of the flap device according to the invention from FIG. 1.
- FIG. 4 schematically shows the flap device in three different rotational positions of the flap body.
- the flap device consists of a flow housing 10, in which a flow-through channel 12 is formed, which is bounded by a surrounding housing wall 14 of the flow housing 10.
- a flow housing 10 On two radially opposite sides of the channel 12, two bearing points 15 are formed in the flow housing 10, in which a shaft 16 is rotatably mounted.
- a flap body 18 On the shaft 16, a flap body 18 is fixed, by means of which a mass flow of a gas can be controlled by rotation of the shaft 16 in the channel 12, wherein the shaft 16 divides the flap body 18 into a first flap wing 20 and a second flap wing 22.
- a projecting out of the flow housing 10 end of the shaft 16 is connected, for example via a lever linkage 23 with an actuator 24, which consists of an electric motor 26 and optionally a downstream transmission, which with a control electronics 28 of the actuator 24 are arranged in an actuator housing 30.
- the channel 12 has three axially successive channel sections 32, 34, 36, of which the first channel section 32 has the largest diameter or largest flow cross-section.
- a second channel portion 34 connects, which is formed as a constriction, so that in the course of the flow cross-section steadily reduced and although to a minimum diameter. From this smallest cross section, the channel 12 continues in the third channel section 36, in which the bearing of the shaft 16 of the valve body 18 is arranged, with this reduced diameter.
- two openings 38, 40 are formed, which serve as pressure measuring points 42, 44.
- An opening 38 is located in the first channel section 32, while a further opening 40 in the third channel section 36 and thus formed behind the constriction.
- both openings 38, 40 are at the same height, that is axially arranged one behind the other and on both sides by 90 ° offset to the bearings of the shaft 16 and thus viewed in the circumferential direction in a remote from the shaft 16 region 46 of Flow housing 10.
- the flap body 18 is in the position shown in FIG. 1 in its position closing the flow cross section of the third channel section 36. In this position, the flap body 18 is located in the flow direction immediately downstream of the second opening 40 at an abutment point 48 on the housing wall 14 at.
- opening the flow cross-section as shown in Figures 4 a) to 4c)
- flap wing 20 is rotated in the flow direction and thus in their direction of the opening 40 remote direction, while the other Flap wing 22 toward the flow, ie upstream, is rotated.
- Pressure changes at this pressure measuring point 44 are measurable even at very small opening angles of the flap body 18, since the pressure measuring point 44 is arranged in the region in which a small maximum opening of the flap body 18, a maximum flow cross section for the gas is released and thus a measurable flow is present ,
- the formed in the third channel section 36 pressure measuring point 44 is disposed within a pivot portion 50 of the valve body 18, ie within the in the rotation of the valve body 18 traversed by the valve body 18 axial portion of the third channel section 36 all opening angles a flow at the pressure measuring point 44 ensured.
- flap surface 52 of the flap body 18 is formed on the flap wing 20 to an outer periphery of the flap body 18 arched.
- This flap surface 52 is constructed so that the flap surface 52 is always parallel to an opposite wall surface 54 of the housing wall 14 of the flow housing 10 in the region of the remote from the shaft 16 stop point 48, regardless of the respective rotational position of the valve body 18th
- this parallelism of the flap surface 52 to the opposite wall surface 54 should always be formed in the pivot region 50 of the flap body 18 at or behind the pressure measuring point 44 in order to obtain exact measured values at the pressure measuring point 44.
- the curved flap surface 52 extends in the direction of the shaft 16, viewed only in a central region 56 of the flap wing 20, in which the largest flow is to be expected and the fluidically has the greatest influence on the measured values at the pressure measuring point 44.
- the curvature viewed in the axial direction of the shaft 16 is also approximately matched to the rounding of the opposite wall surface, whereby a vortex formation in the lateral region of the pressure measuring point 44 is prevented, since a uniformly increasing cross-section is always released when opening the flap.
- a third opening 58 is formed, which serves as a temperature measuring point 60 and in the present embodiment, 90 ° offset from the first opening 38 is formed.
- a temperature sensor 62 is attached, which is connected via a line 64 leading to the actuator housing 30, electrically connected to a likewise disposed in the interior of the actuator housing 30 evaluation 66, which is electrically in the interior of the actuator housing 30 with the control electronics 28 of the actuator 24 connected is.
- a sealed line 68, 70 leads to a pressure sensor, which serves as a
- differential pressure sensor 72 executed is also designed as two separate pressure sensors, which as well as the differential pressure sensor 72 can be attached to the actuator housing 30 and can be arranged in the actuator housing 30.
- the differential pressure sensor 72 is connected to the two lines 68, 70 such that a differential pressure between the first pressure measuring point 42 and the second pressure measuring point 44 is measured directly.
- the differential pressure sensor 72 is connected in the interior of the actuator housing 30 via electrical lines as well as the temperature sensor 62 to the evaluation unit 66, which in turn is coupled via a plug 74 to an engine control unit of the internal combustion engine, via which the power supply of the actuator 24 is effected.
- the measured values of the differential pressure sensor 72 and the temperature sensor 62 are used directly for controlling and regulating the flap body 18 by calculating a mass flow in the evaluation unit 66 from the measured differential pressure and the measured temperature, which is compared with the setpoint value of the mass flow transmitted by the engine control unit.
- the flap body 18 is subsequently rotated via the actuator 24 on account of the control signal generated thereupon in the control electronics 28, in order either to further restrict the mass flow or to release an additional flow cross section. Due to the continuous transmission and calculation of the actual mass flow, the flap body 18 can be rotated very quickly to a position in which the desired value coincides with the calculated actual value without the need for a position signal on the actuator 24 to be used for this purpose.
- the existing flow is reliably measured via the sensors 62, 72 due to the arrangement of the measuring points 42, 44, 60 in the channel 12 even at small flow cross-sections.
- the described flap device reliably delivers very exact measurement results of the pressure difference, which can be used to set the actuator in the shortest time, so that a very fast and direct control takes place. Even with very small gas flows, a high accuracy of the measured values and thus the control is achieved, since there is a measurable and rectified flow in the region of the critical pressure measuring point in the third channel section even with very small opening cross-sections, which is not falsified by turbulence and the resulting pressure losses.
- the entire flap device can be preassembled. This also leads to a significant reduction in emissions, since the gas flows required by the engine control unit can be set very accurately and quickly.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016119426.3A DE102016119426B4 (en) | 2016-10-12 | 2016-10-12 | Flap device for an internal combustion engine |
PCT/EP2017/074496 WO2018069049A1 (en) | 2016-10-12 | 2017-09-27 | Flap device for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3526458A1 true EP3526458A1 (en) | 2019-08-21 |
Family
ID=59982373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17777244.9A Withdrawn EP3526458A1 (en) | 2016-10-12 | 2017-09-27 | Flap device for an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US10954866B2 (en) |
EP (1) | EP3526458A1 (en) |
CN (1) | CN109790781B (en) |
DE (1) | DE102016119426B4 (en) |
WO (1) | WO2018069049A1 (en) |
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- 2016-10-12 DE DE102016119426.3A patent/DE102016119426B4/en active Active
-
2017
- 2017-09-27 CN CN201780060997.1A patent/CN109790781B/en active Active
- 2017-09-27 US US16/340,692 patent/US10954866B2/en active Active
- 2017-09-27 EP EP17777244.9A patent/EP3526458A1/en not_active Withdrawn
- 2017-09-27 WO PCT/EP2017/074496 patent/WO2018069049A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE102016119426A1 (en) | 2018-04-12 |
WO2018069049A1 (en) | 2018-04-19 |
CN109790781B (en) | 2022-11-01 |
US10954866B2 (en) | 2021-03-23 |
DE102016119426B4 (en) | 2020-03-12 |
CN109790781A (en) | 2019-05-21 |
US20190309690A1 (en) | 2019-10-10 |
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