WO2022104405A1 - Emission measuring device with self-testing function - Google Patents
Emission measuring device with self-testing function Download PDFInfo
- Publication number
- WO2022104405A1 WO2022104405A1 PCT/AT2021/060438 AT2021060438W WO2022104405A1 WO 2022104405 A1 WO2022104405 A1 WO 2022104405A1 AT 2021060438 W AT2021060438 W AT 2021060438W WO 2022104405 A1 WO2022104405 A1 WO 2022104405A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- self
- coupling part
- test
- measuring device
- line
- Prior art date
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 124
- 230000008878 coupling Effects 0.000 claims abstract description 155
- 238000010168 coupling process Methods 0.000 claims abstract description 155
- 238000005859 coupling reaction Methods 0.000 claims abstract description 155
- 239000000523 sample Substances 0.000 claims abstract description 105
- 238000005259 measurement Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 106
- 239000012080 ambient air Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
Definitions
- the present invention relates to an emission measuring device with a self-test function, with an exhaust gas line connected to the emission measuring device, which is connected to an emission measuring unit via a measuring line in the emission measuring device, and an exhaust gas probe for exhaust gas extraction being provided at the end of the exhaust gas line facing away from the emission measuring device.
- the invention also relates to a method for carrying out a self-test with such an emission measuring device.
- Emission measuring devices for measuring exhaust emissions, e.g., hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx), particulate matter, etc., from, for example, an internal combustion engine or an industrial process are well known.
- Such emission measuring devices are available in a wide variety of designs and with a wide variety of known measuring principles.
- All emission measurement devices use an exhaust gas probe, which takes exhaust gas from the exhaust stream and feeds it to the emission measurement device, where the extracted exhaust gas can be treated if necessary (e.g. water separation, devolatilization, etc.), diluted if necessary (e.g. in a dilution tunnel) and can be supplied to one or more measuring stages.
- the exhaust gas probe is usually inserted directly into the exhaust pipe of a vehicle and anchored in place during the measurement process, for example by clamping.
- a regular self-test is required to ensure proper operation of the emission measuring device. This can be an adjustment, for example by zeroing with a zero gas (pure gas without emission components, e.g. filtered ambient air) to set a zero point of the measurement or by calibration with a calibration gas (gas with defined emission components).
- a leak test of the probe system exhaust gas probe with the exhaust pipe to the emission measuring device or the entire gas path within the emission measuring device should usually be carried out regularly. In particular in workshop operation and when used by maintenance personnel, it is advantageous if both the adjustment and the leak test can be carried out as simply as possible.
- EP 530 566 A1 proposes providing a shut-off valve in the area of the measuring probe, with which the exhaust pipe can be shut off.
- the exhaust pipe is filled with exhaust gas and the concentration of an emission component in the exhaust gas is measured and the shut-off valve is then closed. Thereafter, this emission component will continue to be measured for a certain period of time. If there is a change in the monitored emission component, a leak is detected.
- the disadvantage here is that the exhaust gas probe for the leak test in the case of motor vehicles in the tailpipe of the exhaust must be arranged and the combustion engine must also be running. However, the leak test is often only carried out once a day, for example at the beginning or end of workshop operations.
- a motor vehicle is not always available for this purpose, on which the test can be carried out.
- it is cumbersome to have to arrange the exhaust gas probe in the exhaust gas flow for this test.
- it is possible to carry out a leak test prior to a specific emission measurement, it is often forgotten during normal use of the emission measuring device, for example in a workshop, and is therefore unreliable. Apart from that, no adjustment (zeroing, calibration) can be carried out with it.
- EPA filter particle filter
- HEPA filter particulate filter
- the exhaust gas probe can be connected to a gas bottle with calibration gas in order to carry out a calibration.
- the flue gas probe is sealed with a sealing plug and a negative pressure is generated and the subsequent increase in pressure is monitored. If the pressure rises too quickly, a leak can be assumed.
- the arrangement of a filter and the connection to a calibration gas as well as the use of a stopper is cumbersome and makes handling the emission measuring device more difficult. In particular, separate parts are required for this, which are often misplaced or lost during normal operation of the emission measuring device, in particular in workshop operation.
- a self-test unit is provided, on which a first coupling part of a connecting coupling is arranged, a second coupling part of the connecting coupling being arranged on a probe tip of the exhaust gas probe and for carrying out a self-test the second coupling part of the probe tip is connected to the first coupling part of the self-test unit can be connected. Due to this double function of the probe tip of the exhaust gas probe, namely the extraction of exhaust gas on the one hand and as part of the connecting coupling on the other hand, a self-test can be carried out very easily. For this purpose, only the first coupling part of the probe tip has to be connected to the first coupling part on the self-test unit.
- the self-test unit has all other features required to perform a self-test, in particular a leak test and/or zeroing or calibration. No additional parts or components to be handled are required for the self-test.
- the probe tip of the exhaust gas probe is designed as a second coupling part.
- the second coupling part and the probe tip are made in one piece or form a common component - the second coupling part represents the probe tip.
- the exhaust gas probe When measuring vehicle exhaust gases, the exhaust gas probe can easily become dirty during use.
- the second coupling part is detachably arranged on the probe tip.
- the second coupling part can be releasably connected to the exhaust gas probe. This allows the second coupling part to be easily removed for cleaning or replacement. It is also conceivable to attach different types of couplings to the exhaust gas probe via this detachable connection. This can be of particular advantage when testing devices by third parties. Such device tests can be, for example, verification by the verification office or calibration in a calibration laboratory.
- a particularly easy-to-handle and compact emission measuring device can be achieved if the self-test unit is integrated in the emission measuring device.
- the self-test unit can also be provided as a separate component of the emission measuring device with its own housing.
- a first locking part is provided on the first coupling part and a second locking part is provided on the second coupling part, the first locking part and the second locking part interacting to lock the first coupling part and the second coupling part when the first coupling part and the second coupling part are connected to each other to produce the connecting coupling. In this way, unintentional release of the connecting coupling can be largely prevented.
- a leak test as a self-test can be easily accomplished if one end of the first coupling part is closed in the self-test unit. In this way, a negative or positive pressure can easily be generated for leak testing in the probe system.
- Zeroing, adjustment or calibration can be easily accomplished if the first coupling part in the self-test unit is connected to a gas inlet of the self-test unit via a self-test line.
- Ambient air can advantageously be used for zeroing if a filter is arranged in the self-test line between the first coupling part and the gas inlet.
- Both self-tests can be easily implemented if a self-test line is provided in the self-test unit, which connects the first coupling part to a gas inlet on the self-test unit and a controllable valve is arranged in the self-test unit between the first coupling part and the gas inlet, which depending on the position of the valve occludes the self-test line to perform a leak test or opens it to perform a zero or calibration.
- a feed pump is preferably provided in the measuring line, with which an overpressure or negative pressure can be generated, and a pressure sensor is provided, which is connected to a control unit of the emission measuring device and the control unit evaluates the time profile of the pressure in the measuring line and that the Control unit detects a leak in the probe system when a change in pressure over time exceeds a predetermined limit value. Since a feed pump and pressure sensors are often installed in an emission measuring device, these components can also be used easily to carry out a leak test.
- the feed pump usually present in an emission measuring device can advantageously also feed gas via the gas inlet, the self-test line, the first coupling part, the exhaust gas probe and the exhaust gas line into the emission measuring unit for the purpose of zeroing, adjustment or calibration.
- FIGS. 1 to 4 show advantageous configurations of the invention by way of example, schematically and not restrictively. while showing
- FIG. 2 shows an exhaust gas probe according to the invention with a coupling part of a connecting coupling
- the exhaust gas probe 1 shows schematically an emission measuring device 10 with an exhaust pipe 4, at the end of which an exhaust gas probe 1 is arranged.
- the exhaust gas probe 1 is inserted, for example, in a known manner into a tailpipe of an exhaust system of a motor vehicle in order to remove exhaust gas from the tailpipe.
- the exhaust gas probe 1 has at least one opening in the region of the probe tip 2 through which exhaust gas can flow into the exhaust gas probe 1 .
- a flow channel is provided in the exhaust gas probe 1 and is connected to the opening and the exhaust gas line 4 in order to guide the extracted exhaust gas to the exhaust gas line 4 .
- the exhaust pipe 4 can be arranged at the end of the exhaust gas probe 1 opposite the probe tip 2 .
- the extracted exhaust gas is routed via the exhaust gas line 4 to an exhaust gas inlet connection 13 of the emission measuring device 10 .
- a measuring line 14 for the exhaust gas leads from the exhaust gas inlet connection 13 to a measuring unit 12 in which the intended treatment and emission measurements are carried out. Flow control also generally takes place in the measuring unit 12 in order to provide a specific quantity of exhaust gas for the emission measurement.
- a feed pump 11 for example a suction pump, is provided in the measuring line 14 , with which exhaust gas is fed through the measuring unit 12 .
- the exhaust gas conveyed through the emission measuring device 10 can be discharged at an exhaust gas outlet connection 15, for example conveyed into the environment or into an extraction system.
- a control unit 16 is arranged in emission measuring device 10 , which controls and monitors the functions of emission measuring device 10 , in particular regulates feed pump 11 and controls measuring unit 12 .
- the usual structure of an emission measuring device 10 is well known, which is why it is not discussed in more detail here, in particular because it is irrelevant to the invention.
- One possible (but not the only possible) embodiment of an emission measuring device 10 is described in WO 2015/0044256 A1, for example.
- the control unit 16 is usually embodied as processor-based hardware, for example a microcontroller, computer, programmable logic controller, etc.
- the control unit 16 can also be embodied as an integrated circuit, e.g. as an application-specific integrated circuit (ASIC) or field-programmable gate array (FPGA).
- ASIC application-specific integrated circuit
- FPGA field-programmable gate array
- An embodiment as an analog electrical circuit is also conceivable.
- combinations of the mentioned versions are conceivable.
- a self-test unit 20 is provided according to the invention.
- the self-test unit 20 is integrated into the emission measuring device 10, but could also be designed separately from the emission measuring device 10, ie as a separate part (as shown in FIG. 1a).
- the self-test unit 20 can have its own control unit, but can also be controlled by the control unit 16 of the emission measuring device 10 if control is required.
- the self-test unit 20 includes a first coupling part 21 of a connecting coupling.
- the second coupling part 22 of the connecting coupling is formed by the exhaust gas probe 1 .
- the first coupling part 21 is a coupling socket and the second coupling part 22 is a coupling plug which is plugged into the coupling socket to establish a connection, or vice versa.
- the exhaust gas probe 1 thus has a dual function according to the invention, namely the removal of exhaust gas from the testing exhaust gas flow on the one hand, and on the other hand the formation of a coupling part of a connection coupling for establishing a connection with the self-test unit 20.
- the second coupling part 22 of the exhaust gas probe 1 can be connected to the first coupling part 21 of the self-test unit 20, for example, be plugged into it.
- the self-test functions are implemented, at least in part, in the self-test unit 20 .
- the probe tip 2 of the exhaust gas probe 1 can be formed in the form of the second coupling part 22 .
- the second coupling part 22 is thus integrated into the exhaust gas probe 1 .
- the probe tip 2 of the exhaust gas probe 1 can also be detachably connected to a second coupling part 22 .
- the probe tip 2 can be inserted into a recess of a coupling adapter that forms the second coupling part 22 .
- the exhaust gas probe 1 can easily be equipped with different second coupling parts 22 .
- the second coupling part 22 is of course connected to the exhaust gas probe in such a way that the second coupling part 22 can be detached but is nevertheless held firmly on the exhaust gas probe 1 when the exhaust gas probe 1 is used.
- a coupling adapter with the second coupling part 22 could be screwed onto or into a probe tip 2, any other detachable non-positive or positive connection being of course also conceivable.
- Exhaust gas probe 1 if the second coupling part 22 of the exhaust gas probe 1 is connected to the first coupling part 21 .
- a filter 24 for example a HEPA filter, and a controlled valve 25 can be arranged in the self-test line 26 .
- Ambient air for example, can be supplied at the gas inlet 23 .
- the filter 24 is provided in order to carry out a zeroing of the emission measuring device 10 with the filtered ambient air, as will be described further below.
- a specific gas e.g. by means of a gas bottle
- the controlled valve 25 designed for example as a switching valve (eg 2/2-way valve), is provided to release or close the flow through the self-test line 26.
- the gas inlet 23 is connected to the first coupling part 21 and gas can flow from the gas inlet 23 to the first coupling part 21 .
- the probe system flue gas probe 1 and flue gas line 4
- the controllable valve 25 can also be dispensed with.
- the controllable valve 25 can be switched over manually from the outside, or can also be controlled by the control unit 16 of the emission measuring device 10 or a control unit of the self-test unit 20 for switching.
- a user interface 17 can be provided on the emission measuring device 10, via which the functions of the emission measuring device 10 can be checked and a self-test can also be started.
- the user interface 17 can be provided with suitable input and output units, such as buttons, sliders, rotary knobs, keys, keyboards, mouse pads, displays, touch screens, etc.
- the exhaust gas probe 1 has a probe tip 2 at a first axial end and a fastening section 3 for an exhaust pipe 4 at the opposite axial end, as shown in FIG.
- the exhaust pipe 4 is suitably arranged in the fastening section 3 of the exhaust gas probe 1 . How this arrangement is specifically designed is irrelevant to the invention, which is why it is not discussed in detail. However, the exhaust pipe 4 can also be connected to the exhaust gas probe 1 in a different way.
- the first coupling part 21 on the self-test unit 20 is designed with a first locking part 6, as shown in FIG.
- the probe tip 2 is designed as a second coupling part 22 with a second locking part 5, as shown in FIG.
- the first coupling part 21 and the second coupling part 22 can be releasably brought together when in use, so that the first locking part 5 and the second locking part 6 releasably engage and the two coupling parts 21, 22 are held together and a substantially gas-tight connection is established.
- the locking parts 5, 6 are released in the manner provided, with which the coupling parts 21, 22 can be separated.
- a second locking part 5 can also be provided on the second coupling part 22 when the second coupling part 22 is designed on a separate coupling adapter which is detachably connected to the probe tip 2 .
- the first and second locking parts 5, 6 can also be dispensed with.
- the first coupling part 21 is designed as a female part of the connecting coupling and the second coupling part 22 as a male part of the connecting coupling.
- the first coupling part 21 and the second coupling part 22 can be designed, for example, as a quick-release coupling, for example according to ISO 6150 B or C, although any other design is of course also possible.
- the connecting coupling (from the first coupling part 21 and the second coupling part 22) can also be known as Screw connection, clamp connection, plug connection, bayonet connection, etc. can be designed, with a corresponding design of the coupling parts 21, 22 and, if necessary, the locking parts 5, 6.
- connection coupling is designed as a quick-release coupling.
- the probe tip 2 in the illustrated embodiment as a second coupling part 22, is designed as a coupling plug (male part) that is plugged into the first coupling part 21, which is designed in the form of a coupling socket (female part), to establish the connection.
- the second coupling part 22 has a first locking part 5 in the form of a peripheral groove 7 on the cylindrical end of the probe tip 2.
- the fixing bodies 8 form the first locking part 6 .
- the fixing bodies 8 can be released or blocked in the radial direction via an axially displaceable sliding sleeve 9 on the first coupling part 21 . If the fixing bodies 8 are released by the position of the sliding sleeve 9, the second coupling part 22 can be inserted into the first coupling part 21 or removed from it. If the fixing bodies 8 are locked in the radial direction by means of the sliding sleeve 9 , the second coupling part 22 is fixed in the first coupling part 21 .
- the exhaust gas probe 1 is connected to the second coupling part 22 with the first coupling part 21 of the self-test unit 20 .
- a flow channel is thus formed from the gas inlet 23 via the self-test line 26 to the exhaust gas probe 1 and the exhaust gas line 4 .
- gas for example filtered ambient air or a calibration gas / adjustment gas, for zeroing or calibration / adjustment to the measuring unit
- the switchable valve 25 is switched in such a way that the first coupling part 21 is connected to the gas inlet 23 . This can be done automatically by the control unit 16, for example, by selecting to carry out a zeroing or calibration/adjustment at the user interface.
- the exhaust gas probe 1 is connected to the second coupling part 22 with the first coupling part 21 of the self-test unit 20 .
- the switchable valve 25 is switched in such a way that the first clutch part 21 is not connected to the gas inlet 23 .
- This can be done automatically by the control unit 16, for example, by selecting to carry out a leak test on the user interface.
- a negative or positive pressure can now be generated in the connected probe system (exhaust gas probe 1 with exhaust pipe 4) (depending on the type of pump and the control of the pump).
- the tightness of the feed pump 11 lying upstream also changes Section of the measuring line 14 and possibly also the components of the emission measuring unit 12 are also checked.
- the time profile of the pressure can be checked. Provision can be made for the feed pump 11 to be sealed on the outlet side when switched off, so that the pressure cannot rise via the exhaust gas outlet connection 15 .
- Commercial diaphragm pumps for example, offer this function.
- the underpressure or overpressure for a leak test could also take place by connecting the probe system to a preferably external vacuum or overpressure line.
- a preferably external vacuum or overpressure line For example, there is often a compressed air line in workshops to which the self-test unit 20 or the emission measuring device 10 can be connected.
- the probe system can then be connected to the vacuum or overpressure line via a valve and the first coupling part 21, 21a.
- the measuring line 14 in the emission measuring device 10 could be connected via a valve 29 to such an external vacuum or overpressure line 28, as indicated by a broken line in FIG. 1a.
- the first coupling part 21, 21a could be connected to such a vacuum or overpressure line, preferably via a valve.
- Such a valve would then also close the end of the first coupling part 21, 21a for carrying out the leak test after the probe system has been connected to the vacuum or overpressure line and the pressure present therein.
- the probe system could also be connected to such a line to carry out a leak test.
- a pressure sensor 18 can be arranged, for example, in the measuring line 14 in the emission measuring device 10 for leak testing, preferably upstream of the feed pump 11.
- the control unit 16 can read the pressure sensor 18, for example for specified magazines, and evaluate the time profile of the pressure. If the pressure changes too much over time (which may be configured in the control unit 16), a leak is determined. For this purpose, a limit value for a change in pressure over time can be specified, and it can be checked whether the change in pressure over time exceeds the limit value within a certain period of time. The result of the leak test can be signaled at the user interface 17 .
- first coupling parts 21, 21a on the self-test unit 20, as shown in FIG. 1a.
- One of these would be closed at the end of the coupling part 21a in order to carry out a leak test.
- this first coupling part 21a could also be connected to an external vacuum or overpressure line via a valve.
- the other would be connected to self-test line 26 with gas inlet 23 .
- a switchable valve 25 to Switching between leak testing and calibration / adjustment would not be necessary for this.
- the exhaust gas probe 1 To carry out a self-test, the exhaust gas probe 1 must be connected to the correct first coupling part 21, 21a.
- a spacer 27 (as shown in FIG. 4) can also be arranged on the exhaust gas probe 1 in a known manner, in order to arrange and hold the exhaust gas probe 1, for example, in a tailpipe of an exhaust system. Possible designs of a spacer 27 are also described in DE 102015 108 586 A1. However, it is also possible (additionally or alternatively) to provide a separate holding device for the exhaust gas probe 1 in a tailpipe, for example as described in WO 2015/0044256 A1.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023530960A JP2023550176A (en) | 2020-11-23 | 2021-11-22 | Emission measuring device with self-test function |
CN202180078585.7A CN116583749A (en) | 2020-11-23 | 2021-11-22 | Emission measuring instrument with self-test function |
EP21815352.6A EP4248206A1 (en) | 2020-11-23 | 2021-11-22 | Emission measuring device with self-testing function |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA51016/2020A AT524314B1 (en) | 2020-11-23 | 2020-11-23 | Emission meter with self-test function |
ATA51016/2020 | 2020-11-23 |
Publications (1)
Publication Number | Publication Date |
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WO2022104405A1 true WO2022104405A1 (en) | 2022-05-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/AT2021/060438 WO2022104405A1 (en) | 2020-11-23 | 2021-11-22 | Emission measuring device with self-testing function |
Country Status (5)
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EP (1) | EP4248206A1 (en) |
JP (1) | JP2023550176A (en) |
CN (1) | CN116583749A (en) |
AT (1) | AT524314B1 (en) |
WO (1) | WO2022104405A1 (en) |
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DE102015108586A1 (en) | 2014-06-20 | 2015-12-24 | Avl List Gmbh | Sampling device |
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KR100432406B1 (en) * | 2003-01-14 | 2004-05-27 | 주식회사 이플러스티 | Diagnostic, light-extinction type diesel smoke meter |
US7281440B2 (en) * | 2005-04-29 | 2007-10-16 | Caterpillar Inc. | Particulate sampling system having flow check device |
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2020
- 2020-11-23 AT ATA51016/2020A patent/AT524314B1/en active
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2021
- 2021-11-22 EP EP21815352.6A patent/EP4248206A1/en active Pending
- 2021-11-22 WO PCT/AT2021/060438 patent/WO2022104405A1/en active Application Filing
- 2021-11-22 JP JP2023530960A patent/JP2023550176A/en active Pending
- 2021-11-22 CN CN202180078585.7A patent/CN116583749A/en active Pending
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DE7017426U (en) * | 1968-09-18 | 1970-10-22 | Beckman Instruments Inc | JET PUMP. |
EP0155793A2 (en) * | 1984-03-19 | 1985-09-25 | Horiba Instruments Incorporated | Proportional exhaust sampler system and control means |
EP0530566A1 (en) | 1991-09-02 | 1993-03-10 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Method and arrangement for carrying out leak test by exhaust gas test apparatus |
WO1997012221A1 (en) * | 1995-09-29 | 1997-04-03 | Horiba Instruments, Inc. | Method and apparatus for providing diluent gas to exhaust emission analyzer |
US6516656B1 (en) * | 1999-12-28 | 2003-02-11 | Honda Giken Kogyo Kabushiki Kaisha | System for vehicle emission sampling and measurement |
US7071002B1 (en) * | 2000-05-09 | 2006-07-04 | Gordon-Darby Systems, Inc. | Method and system for vehicle emission testing |
WO2015044256A1 (en) | 2013-09-25 | 2015-04-02 | Avl List Gmbh | Exhaust gas removal probe |
WO2015140343A1 (en) * | 2014-03-21 | 2015-09-24 | Avl List Gmbh | Calibrating unit for an exhaust-gas measuring device |
DE102015108586A1 (en) | 2014-06-20 | 2015-12-24 | Avl List Gmbh | Sampling device |
US20200309647A1 (en) * | 2019-03-29 | 2020-10-01 | Rosemount Inc. | Self-contained calibration apparatus for gas sensor |
Also Published As
Publication number | Publication date |
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AT524314B1 (en) | 2022-05-15 |
AT524314A4 (en) | 2022-05-15 |
CN116583749A (en) | 2023-08-11 |
EP4248206A1 (en) | 2023-09-27 |
JP2023550176A (en) | 2023-11-30 |
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