EP3207349A1 - Capteur de pression pour détecter une pression d'un milieu fluide - Google Patents

Capteur de pression pour détecter une pression d'un milieu fluide

Info

Publication number
EP3207349A1
EP3207349A1 EP15762959.3A EP15762959A EP3207349A1 EP 3207349 A1 EP3207349 A1 EP 3207349A1 EP 15762959 A EP15762959 A EP 15762959A EP 3207349 A1 EP3207349 A1 EP 3207349A1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure sensor
sensor module
measuring
housing
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Withdrawn
Application number
EP15762959.3A
Other languages
German (de)
English (en)
Inventor
Masoud Habibi
Markus Reinhard
Hartmut Stetter
Michael Bachner
Bernd RIETHMUELLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3207349A1 publication Critical patent/EP3207349A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L15/00—Devices or apparatus for measuring two or more fluid pressure values simultaneously
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/14—Housings
    • G01L19/142—Multiple part housings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/24—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid specially adapted for measuring pressure in inlet or exhaust ducts of internal-combustion engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L2019/0053—Pressure sensors associated with other sensors, e.g. for measuring acceleration, temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
    • G01L9/0052—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance of piezoresistive elements

Definitions

  • Dynamically acting pressure sensors are only used to measure pressure oscillations in gaseous or liquid media.
  • the pressure measurement can be done directly, via membrane deformation or by a force sensor.
  • the most widely used method of pressure detection therefore initially uses a thin membrane as a mechanical signal for signal recovery
  • DE 10 2011 085 055 A1 describes a temperature measuring device for detecting a temperature of a flowing fluid medium, in which optionally a pressure sensor module can be provided.
  • DE 2012 218 214 A1 describes a pressure sensor for measuring a pressure of a fluid medium with a housing and a pressure port. In the housing two independent sensor elements are arranged. A pressure supply can take place via the pressure port through Druckzu Kunststoffkanäle to the sensor elements, which measure the applied pressure. In this way, a redundant pressure measurement can be ensured, but not the pressure can be detected at different locations in the measuring space.
  • EP 1 521 952 B1 describes a device for pressure measurement with pressure sensor module, which measures a differential pressure between two
  • exhaust gas turbocharger mechanically or by the expelled from the engine combustion gas (exhaust) of the engine (exhaust gas turbocharger) are driven.
  • the ratio of fuel to air mass must be due to the flammability of the pollutants produced during combustion, etc. in a certain range and is therefore controlled or regulated depending on the operation.
  • diesel particulate filter For example, due to the EU5 emission standard.
  • the diesel particulate filter However, accumulated particles must be removed from this again. This means that the diesel particulate filter has to be regenerated on a regular basis by increasing the exhaust gas temperature in the diesel particulate filter to such an extent that the particles burn to ashes. To control the regeneration intervals will be in the
  • a differential pressure sensor is installed over the diesel particulate filter, which allows modeling of diesel particulate filter loading.
  • Reduction of nitrogen oxide emissions is attributed to the engine not only fresh air, but also exhaust gas.
  • the proportion of recirculated exhaust gas in the total intake mass flow, ie the exhaust gas recirculation rate, is generally varied depending on the operating point, for example engine speed, load, temperature, etc.
  • Exhaust gas recirculation can be done directly from the outlet to the inlet in the form of a high pressure exhaust gas recirculation of the engine or from one point to the turbine and diesel particulate filter to a point upstream of the compressor in the form of a low pressure exhaust gas recirculation.
  • Low pressure exhaust gas recirculation rate is therefore crucial. To calculate the low pressure exhaust gas recirculation rate, the low pressure exhaust gas recirculation mass flow is needed in addition to the fresh air. Of the
  • Fresh air mass flow is measured for passenger cars in general with a sensor, such as an air mass meter or
  • Hot film air mass meter The low pressure exhaust gas recirculation mass flow is generally supplied via a differential pressure sensor over the
  • Low-pressure exhaust gas recirculation line is modeled as a throttle.
  • the first pressure sensor module and the second pressure sensor module are arranged in the sensor housing.
  • the pressure sensor furthermore has at least one first pressure connection, which is designed to connect to the first measurement space.
  • the pressure sensor furthermore has at least one second pressure connection, which is designed to connect to the second measurement space.
  • the first pressure port is different from the second one
  • the first measuring space may differ from the second measuring space in terms of its position and / or the amount of the pressure prevailing therein.
  • the difference can for example be realized in that the first measuring space is formed separately from the second measuring space, in particular spatially separated. Nevertheless, the first measuring chamber and the second measuring chamber can be connected to one another, so that an exchange of the fluid medium from the first measuring chamber into the second measuring chamber and vice versa is permitted.
  • the first differs from the second measuring space in terms of its position and / or the amount of the pressure prevailing therein.
  • the difference can for example be realized in that the first measuring space is formed separately from the second measuring space, in particular spatially separated. Nevertheless, the first measuring chamber and the second measuring chamber can be connected to one another, so that an exchange of the fluid medium from the first measuring chamber into the second measuring chamber and vice versa is permitted.
  • the first differs
  • the first pressure port and the second pressure port are two separate or different components.
  • the first pressure port has a supply channel.
  • the second pressure port also has a supply channel. Because the first
  • Pressure port and the second pressure port are two different components, there is a supply of the fluid through the first pressure port to the first pressure sensor module regardless of a supply of the fluid
  • the first pressure sensor module and the second pressure sensor module are identical to The first pressure sensor module and the second pressure sensor module.
  • the second pressure sensor module can be designed to detect a third pressure of the medium in a third measuring space.
  • Pressure sensor may further comprise a third pressure port, which is designed to connect to the third measuring space.
  • the third pressure port may be different from the first pressure port and the second pressure port.
  • the third measuring space may differ from the first measuring space and / or the second measuring space with regard to their position and / or the amount of the pressure prevailing in them. The difference can be realized, for example, in that the third measuring space is formed separately from the first measuring space and / or the second measuring space, in particular spatially separated. Nevertheless, the third measuring space and the first measuring space and / or the second
  • the first pressure sensor module may be for detecting an absolute pressure of the
  • the first pressure sensor module may be designed to detect the second pressure of the medium. Accordingly, the second pressure can be detected by the first pressure sensor module and / or the second pressure sensor module.
  • the first pressure sensor module may be configured to detect a first differential pressure between the first pressure and the first pressure sensor module be formed second pressure.
  • the second pressure sensor module may be designed to detect a second differential pressure between the second pressure and the third pressure.
  • the sensor housing may have a first
  • Housing space in which the first pressure prevails a second housing space in which the second pressure prevails, and a third housing space in which the third
  • the first housing space, the second housing space and the third housing space may be separated from each other.
  • the first pressure sensor module and the second pressure sensor module can be arranged one above the other in two different planes.
  • the two planes can be arranged parallel to one another.
  • the first pressure sensor module and the second pressure sensor module can be stacked one above the other, for example.
  • the first pressure sensor module and the second pressure sensor module are arranged side by side in the sensor housing. Under a pressure sensor module is in the context of the present invention a
  • the pressure sensor module may be a pressure sensor element in the form of a measuring bridge
  • the pressure sensor module is for this purpose with an evaluation and / or
  • Pressure sensor elements can be made to the above-described prior art, in particular to Konrad Reif (ed.): Sensors in the motor vehicle, 1st edition 2010, pages 80-82 and 134-136.
  • an evaluation and / or control circuit is a component which is suitable for signal processing. For example, it may be in the evaluation or
  • Such a circuit is an electronic circuit which is realized as an integrated circuit.
  • a circuit carrier is to be understood as meaning any component which is suitable for carrying a circuit.
  • the circuit carrier is designed as a printed circuit board.
  • a printed circuit board is to be understood as a support for electronic components which serves for the mechanical fastening of the electrical connection.
  • the printed circuit boards are made of electrically insulating material with adhering, conductive connections, the so-called printed conductors.
  • the pressure sensor according to the invention can be used for the diagnosis of particle filters or for detecting a backpressure, such as exhaust back pressure upstream of a turbocharger.
  • a pressure connection is to be understood as meaning a component which is designed to be connected to a measuring space.
  • the pressure port is on
  • Connecting element which cooperates with a connecting element of the measuring space.
  • the pressure port has an external thread which engages in an internal thread of a wall of the measuring space.
  • other types of connecting element may be provided, such as a snap connection or a bayonet lock.
  • the pressure connection can be designed in particular as a pressure connection.
  • a nozzle is to be understood in the context of the present invention, a short tubular extension piece. Since the nozzle protrudes into the fluid medium and there the temperature is measured, the nozzle is in the context of the present invention as
  • Measuring nozzle designated. Since the fluid medium usually has a pressure above the atmospheric or normal pressure, so that the nozzle must have a certain pressure resistance, the nozzle is
  • the pressure sensor may further include a temperature sensor for detecting a temperature of the fluid medium.
  • Temperature sensor is to be understood in the context of the present invention, any type of known temperature sensors, in particular so-called NTCs, d. H. temperature-dependent electrical resistors with a negative
  • the pressure sensor according to the invention is used in the field of a motor vehicle, such as in the supply and exhaust system of a motor vehicle
  • Cost reduction potential for sensor costs and installation costs in the vehicle and system costs by reducing or simplifying cabling and tubing.
  • the required installation space is reduced.
  • the sensor elements required for the differential pressure measurement are installed in a common housing, for example in a so-called back-to-back arrangement or the like. Since both sensors are operated with a common power supply and ground, two pins on the sensor and two wires in the cable harness are eliminated compared to two separate sensors, which reduces component costs, space requirements and the complexity of the arrangement. Because the
  • Diesel particulate filter is identical, a discharge nozzle and thus a pressure hose can be omitted.
  • a multi-channel interface preferably the digital S ENT ("single edge nibble transmission") or PSI5-Cperipheral sensor interface 5 "interface, additional pins and pins can be used
  • Diesel particulate filter is identical, a discharge nozzle including associated
  • Figure 1 is an exploded view of a pressure sensor according to a first
  • FIG. 2 shows a basic structure of the pressure sensor
  • FIG. 3 shows a simplified representation of an arrangement of the pressure sensor
  • Figure 4 is a block diagram of an engine with the pressure sensor and Figure 5 is a plan view of a pressure sensor according to a second
  • FIG. 1 shows an exploded view of a pressure sensor 10 according to the invention for detecting a pressure of a fluid medium.
  • the pressure sensor may be configured as a combined pressure-temperature sensor, as described in more detail below. Since the invention is particularly applicable in the field of automotive engineering, the pressure sensor 10 at various
  • the pressure sensor 10 has a sensor housing 15, which may be closed by a housing cover 16.
  • the pressure sensor 10 may further comprise a measuring port 18, which as
  • Pressure port can be configured to have.
  • the measuring port 18 can protrude into the fluid medium and flow around it.
  • the metering stub 18 has a lower end 20 and an upper end 22 that is closer to the sensor housing 15 than the lower end 20. At the top
  • a sealing ring 26 such as an O-ring, be provided, by means of which the sensor housing 15 relative to the
  • Measuring chamber 12 may be sealed.
  • the measuring nozzle 18 is cage-shaped and has openings 28 through which the flowing fluid medium can flow into the interior of the measuring nozzle 18.
  • the openings 28 are at least partially bounded by struts 30.
  • a temperature sensor 32 may optionally be included inside the measuring nozzle 18, a temperature sensor 32 may optionally be included.
  • the temperature sensor 32 may be formed, for example, in the form of an NTC resistor.
  • the temperature sensor 32 has a measuring head 34 in the form of a glass or plastic bead with two electrical connections 36 in the form of bendable legs.
  • the measuring head 34 is, for example, spherical and has a diameter between 1 mm and 4 mm.
  • the temperature sensor 32 may be remote from the measuring housing 18 side of the sensor housing 15 be introduced. Accordingly, the temperature sensor 32 is at least partially introduced into the measuring port 18.
  • a first pressure sensor module 38 is arranged inside the sensor housing 15.
  • the first pressure sensor module 38 is designed to detect at least a first pressure of the fluid medium.
  • a second pressure sensor module 40 is further arranged.
  • the second pressure sensor module 40 is designed to detect at least one second pressure of the fluid medium.
  • the first pressure sensor module 38 and the second pressure sensor module 40 are arranged in the sensor housing 15 one above the other and separated from each other.
  • the second pressure sensor module 40 is further configured to detect a third pressure of the fluid medium.
  • the first pressure sensor module 38 is designed to detect an absolute pressure of the medium. Alternatively, the first pressure sensor module 38 may also be designed to detect the second pressure of the medium.
  • Pressure, the second pressure and / or the third pressure may differ from each other.
  • FIG. 2 shows a schematic structure of the pressure sensor 10. Shown is the arrangement of the first pressure sensor module 38 and the second
  • Pressure sensor module 40 in the interior of the sensor housing 15. Inside the sensor housing 15, the first pressure sensor module 38 and the second pressure sensor module 40 in two different levels 42, 44 are arranged one above the other. The two planes 42, 44 are arranged parallel to each other. In this case, the first pressure sensor module 38 and the second pressure sensor module 40 are arranged in the form of a stack in the form of a stack. As a result, the sensor housing 15 has a first housing space 46 in which the first pressure prevails, a second housing space 48 in which the second pressure prevails and a third
  • Housing space 50 in which the third pressure prevails, on.
  • the first housing space 46, the second housing space 48, and the third housing space 50 are
  • the pressure sensor 10 has a first pressure port 56, which is for connecting to the first
  • Measuring chamber 12 is formed.
  • a supply channel (not shown in greater detail) is formed in the interior of the first pressure port 56, which supply means feed the fluid medium first housing space 46 allowed.
  • the measuring port 18 is designed as a first pressure port 56.
  • the pressure sensor 10 furthermore has a second pressure connection 58, which is designed to connect to the second measurement space 13. For supplying the fluid medium in the second
  • Housing space 48 is formed in the interior of the second pressure port 58, a feed channel not shown in detail.
  • the pressure sensor 10 further has a third pressure port 60, which connects to the third
  • Measuring chamber 14 is formed.
  • a supply channel for supplying the fluid medium to the third housing space 50, a supply channel, not shown in greater detail, is formed in the interior of the third pressure port 60.
  • a diameter of the supply channel of the second pressure port 58 may be of a diameter of
  • Supply channel of the third pressure port 60 differ.
  • the first pressure sensor module 38 may be for detecting a first
  • the first pressure sensor module 38 is arranged in the partition wall 52 such that the first pressure in the first housing space 46 acts on an upper side 62 of the first pressure sensor module 38 and the second pressure in the second housing chamber 48 acts on a lower side 64 of the first pressure sensor module 38.
  • the second pressure sensor module 40 may be configured to detect a second differential pressure between the second pressure and the third pressure.
  • the second pressure sensor module 40 is arranged in the partition wall 54 such that the second pressure in the second housing space 48 acts on an upper side 66 of the second pressure sensor module 40 and the third pressure in the third housing chamber 50 acts on an underside 68 of the second pressure sensor module 40.
  • FIG. 3 shows a schematic arrangement for pressure detection of the
  • the pressure sensor 10 may detect the first pressure, the second pressure, and the third pressure of the fluid medium at various locations.
  • the first measuring chamber 12, the second measuring chamber 13 and the third measuring chamber 14 can be spatially different from one another.
  • the first pressure, the second pressure and the third pressure may differ due to installations between the first measuring chamber 12, the second measuring chamber 13 and the third measuring chamber 14.
  • Measuring chamber 13 and the second pressure port 58 and the third pressure port 60 are connected on different sides of a second component 72 with the second measuring chamber 13 and the third measuring chamber 14.
  • the first differential pressure may be a differential pressure across the first component 70 and the second differential pressure may be a differential pressure across the second component 72.
  • the first component 70 and / or the second component 72 are for example filters, by means of which the fluid medium is filtered.
  • the first component 70 and / or the second component 72 are different, for example
  • Components that cause pressure drop or pressure increase such as chokes or compressors.
  • FIG. 4 shows a schematic arrangement of the pressure sensor 10 in an engine 74 of an internal combustion engine.
  • the engine 74 includes an air filter 76, an exhaust gas turbocharger 78, an intercooler 80, a combustion chamber 82, a particulate filter 84, such as a diesel particulate filter, and an exhaust 86.
  • the components mentioned are via lines, such as
  • the pressure sensor 10 may, for example, with the first pressure port 56 with the first measuring chamber at a position between an exhaust gas turbine 92 of the
  • Exhaust gas turbocharger 78 and the particulate filter 84 may be connected.
  • the second pressure port 58 may be connected to the second measurement space 13 at a location downstream of the particulate filter 84. This point is located approximately in the region of a removal point of the exhaust gas recirculation line 90.
  • the third pressure connection 60 can be connected to the third measurement space 14 at a position upstream of a compressor 94 of the exhaust gas turbocharger 78. This location corresponds approximately to one entry point of
  • Exhaust gas recirculation line 90 spatially close to each other and the position of the removal point of the exhaust gas recirculation line 90 with the position
  • FIG. 5 shows a plan view of a pressure sensor 10 according to a second embodiment of the present invention.
  • Pressure sensor module 40 arranged side by side in the sensor housing 15.
  • the first pressure sensor module 38 and the second pressure sensor module 40 may be arranged within a common plane, not shown. Alternatively, the first pressure sensor module 38 and the second
  • Pressure sensor module 40 is disposed in different height positions within the sensor housing 15.
  • the height position is a position determined by a dimension perpendicular to the plane of the drawing of FIG.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un capteur de pression (10) servant à la détection d'une pression d'un milieu fluide dans un espace de mesure (12). Le capteur de pression (10) comprend un boîtier (15), un premier module capteur de pression (38) pour détecter au moins une première pression du milieu dans un premier espace de mesure (12) et un deuxième module capteur de pression (40) pour détecter au moins une deuxième pression du milieu dans un deuxième espace de mesure (13). Le premier module capteur de pression (38) et le deuxième module capteur de pression (40) sont disposés dans le boîtier (15) du capteur. Le capteur de pression (10) comporte en outre au moins un premier branchement de pression (56), qui est réalisé pour la liaison avec le premier espace de mesure (12). Le capteur de pression (10) comporte en outre au moins un deuxième branchement de pression (58), qui est réalisé pour la liaison avec le deuxième espace de mesure (13). Le premier branchement de pression (56) est différent du deuxième branchement de pression (58).
EP15762959.3A 2014-10-16 2015-09-02 Capteur de pression pour détecter une pression d'un milieu fluide Withdrawn EP3207349A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014221067.4A DE102014221067A1 (de) 2014-10-16 2014-10-16 Drucksensor zur Erfassung eines Drucks eines fluiden Mediums
PCT/EP2015/070002 WO2016058743A1 (fr) 2014-10-16 2015-09-02 Capteur de pression pour détecter une pression d'un milieu fluide

Publications (1)

Publication Number Publication Date
EP3207349A1 true EP3207349A1 (fr) 2017-08-23

Family

ID=54105778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15762959.3A Withdrawn EP3207349A1 (fr) 2014-10-16 2015-09-02 Capteur de pression pour détecter une pression d'un milieu fluide

Country Status (6)

Country Link
US (1) US10429259B2 (fr)
EP (1) EP3207349A1 (fr)
KR (1) KR20170067780A (fr)
CN (1) CN107076632B (fr)
DE (1) DE102014221067A1 (fr)
WO (1) WO2016058743A1 (fr)

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DE102019209393A1 (de) * 2018-12-20 2020-06-25 Robert Bosch Gmbh Drucksensor zur Druckerfassung fluider Medien und Drucksensoreinrichtung mit einem solchen Drucksensor
CN209326840U (zh) 2018-12-27 2019-08-30 热敏碟公司 压力传感器及压力变送器
DE102019205154A1 (de) * 2019-04-10 2020-10-15 Robert Bosch Gmbh Drucksensor zur Druckerfassung fluider Medien und Drucksensoreinrichtung mit einem solchen Drucksensor
CN110501110A (zh) * 2019-08-12 2019-11-26 联合汽车电子有限公司 压力传感器
AT17013U1 (fr) * 2019-09-05 2021-02-15 Zieger Dipl Ing Andreas
CN112483073B (zh) * 2020-12-15 2023-07-04 贵州航天凯山石油仪器有限公司 一种多功能的压力计安装装置
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CN107076632B (zh) 2019-11-22
KR20170067780A (ko) 2017-06-16
US10429259B2 (en) 2019-10-01
WO2016058743A1 (fr) 2016-04-21
DE102014221067A1 (de) 2016-04-21
US20170315009A1 (en) 2017-11-02

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