WO1993004367A1 - Dispositif de mesure pour la detection de substances nocives, en particulier dans l'air frais a amener dans l'habitacle d'un vehicule - Google Patents

Dispositif de mesure pour la detection de substances nocives, en particulier dans l'air frais a amener dans l'habitacle d'un vehicule Download PDF

Info

Publication number
WO1993004367A1
WO1993004367A1 PCT/DE1992/000659 DE9200659W WO9304367A1 WO 1993004367 A1 WO1993004367 A1 WO 1993004367A1 DE 9200659 W DE9200659 W DE 9200659W WO 9304367 A1 WO9304367 A1 WO 9304367A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor chamber
sensor
measuring device
air
fresh
Prior art date
Application number
PCT/DE1992/000659
Other languages
German (de)
English (en)
Inventor
Peter Nolting
Heiner Holland
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 WO1993004367A1 publication Critical patent/WO1993004367A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/008—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being air quality
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H3/00—Other air-treating devices
    • B60H3/0085—Smell or pollution preventing arrangements
    • 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
    • G01N1/2273—Atmospheric sampling
    • 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
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
    • 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
    • G01N1/24—Suction devices

Definitions

  • Measuring device for detecting pollutants in the fresh air to be supplied, in particular in a vehicle space
  • the invention relates to a measuring device for detecting pollutants according to the preamble of the main claim.
  • Measuring devices of this type have the advantage that they work largely independently of the inflow speed of the fresh air or in a vehicle independently of its driving speed, so that this interference factor influencing the measured value of the sensor element is practically eliminated.
  • the device for the forced ventilation of the sensor is designed as a pulsator, the delivery piston of which is arranged upstream of the filter and therefore the risk of contamination by entrained in the fresh air stream Dust particles and the same is exposed.
  • the pulsator design does not allow defined, ram air-independent air metering.
  • the measuring device according to the invention with the characterizing features of the main claim has the advantage that the device for the forced ventilation of the sensor chamber or the conveying element of this device is arranged downstream of the filter and is therefore largely protected against contamination.
  • ram air influences do not affect the amount of measurement air.
  • the conveying element of the ventilation device is a displacement pump in an air line leading out of the sensor chamber.
  • the housing containing the sensor chamber can optionally be combined with the displacement pump to form a structural unit.
  • an accumulator buffering the negative pressure is installed or connected in or to the air line connecting the sensor chamber to the suction pipe.
  • the volume of the reservoir is expediently chosen so that in the event of diffusion of highly volatile vapors influencing the sensor element from the suction pipe into the sensor chamber, such vapors are diluted to such an extent that their remaining concentration compared to the outside air pollutant concentration is neglected ⁇ is permissible.
  • a check valve can advantageously be provided between the intake manifold of the internal combustion engine and the accumulator, which maintains the negative pressure in the accumulator and prevents backflows of gases and vapors that can be detected by the sensor element.
  • FIGS. 1 to 3 each show one of the exemplary embodiments, each with a longitudinal section through a structural unit receiving the sensor element
  • FIGS. 4 and 5 each show a modification of a component of the exemplary embodiment according to FIG. 3.
  • the measuring device has a tubular housing 10 which carries an air filter 12 on one end face, to which a flow of the ambient air to be monitored of the vehicle is fed via a duct 14.
  • the other end face of the housing 10 is closed by a plate 16 to which a sensor element 18 is fastened on the inside.
  • a sensor chamber 20 is formed, which is enclosed on all sides by the housing 10 except for an opening 22 which serves to discharge the air.
  • the means described in more detail below in the sensor chamber 20 produce an air throughput which is minimally required for the detection of pollutants and is stabilized to an approximately constant amount, so that the signal from the sensor element 18 exposed to the air flow is largely independent of the driving speed of the vehicle .
  • the channel 14 can additionally be directed towards the bow of the vehicle or at least laterally to the longitudinal axis of the vehicle, so that the airstream cannot enter channel 14.
  • a line 26 is connected to the opening 22 of the housing 10 and opens into a free space of the vehicle via a displacement pump 28 or is supplied to other consumers of compressed air.
  • volume-controlled suction of the air entering via the duct 14 takes place in the sensor chamber 20, so that the influence of the driving speed is largely eliminated.
  • the sensor chamber is connected to the negative pressure in the intake manifold of the internal combustion engine 32 of the vehicle.
  • a line 34 is provided for this purpose, in which a flow controller 36 is installed in the sensor chamber 20 in order to stabilize or keep the air throughput constant.
  • a reservoir 42 buffering the negative pressure and a check valve 44 between this and the intake manifold 30 are provided in a line 38 connecting the sensor chamber 20 to the intake manifold 30 of the internal combustion engine 32.
  • the volume of the reservoir 42 is selected to be so large that, in the event of diffusion of highly volatile vapors influencing the sensor element 18 from the suction pipe 30 into the sensor chamber 20, these vapors are diluted so strongly that their remaining concentrations tration compared to the outside air pollutant concentration is negligible.
  • the check valve 44 maintains the negative pressure in the accumulator 42 and prevents backflow of gases and vapors that could be detected by sensor element 18.
  • the throttle element 40, the accumulator 42 and the check valve 44 can be combined in a practical embodiment to form a structural unit.
  • the throttle body 40 can, according to FIG. 4, have a simple aperture 46 be provided in a housing 48, which can also contain an additional dirt filter 50 against clogging of the aperture 46.
  • the housing 48 contains, instead of a dirt filter, a spring-loaded cleaning needle 52 which plunges into the orifice opening 46 and is actuated by the vacuum changes in the intake manifold 30 or storage 42.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Atmospheric Sciences (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Thermal Sciences (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

Dans un dispositif de mesure du type générique, le dispositif pour la ventilation forcée de la chambre de mesure (20) a un élément de refoulement (28, 30, 32) disposé en aval de la chambre de mesure (20), lequel génère dans la chambre de mesure (20) une dépression, indépendante de l'air accumulé, par rapport à la pression atmosphérique. Cela a pour conséquence que l'élément sensoriel est ventilé de manière dosée et que l'élément de refoulement (28, 30, 32), ainsi que le détecteur sont protégés contre l'encrassement par le filtre à air (12) placé en amont de la chambre de mesure (20). Le domaine d'application préférentiel concerne des dispositifs de mesure de la teneur en substances nocives dans l'air frais à amener dans l'habitacle d'un véhicule automobile.
PCT/DE1992/000659 1991-08-21 1992-08-08 Dispositif de mesure pour la detection de substances nocives, en particulier dans l'air frais a amener dans l'habitacle d'un vehicule WO1993004367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9110325U DE9110325U1 (de) 1991-08-21 1991-08-21 Meßeinrichtung zum Erfassen von Schadstoffen in der, insbesondere einem Fahrzeugraum zuzuführenden Frischluft
DEG9110325.8U 1991-08-21

Publications (1)

Publication Number Publication Date
WO1993004367A1 true WO1993004367A1 (fr) 1993-03-04

Family

ID=6870450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000659 WO1993004367A1 (fr) 1991-08-21 1992-08-08 Dispositif de mesure pour la detection de substances nocives, en particulier dans l'air frais a amener dans l'habitacle d'un vehicule

Country Status (2)

Country Link
DE (1) DE9110325U1 (fr)
WO (1) WO1993004367A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095983A1 (fr) * 2002-05-10 2003-11-20 Abb Patent Gmbh Procede et dispositif pour prelevement d'echantillons d'air ambiant
US20170122788A1 (en) * 2015-10-29 2017-05-04 Mitsubishi Electric Corporation Flow rate measurement device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3627306B2 (ja) * 1994-11-17 2005-03-09 株式会社デンソー 車両用ガス検出装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2212687A1 (de) * 1972-03-16 1973-09-20 Hermann Stark Belueftungseinrichtung fuer den innenraum von fahrzeugen
US4618855A (en) * 1984-12-14 1986-10-21 Genelco, Inc. Soil pollution monitoring system
DE3514588A1 (de) * 1985-04-23 1986-10-23 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Gehaeuse fuer sensoren, vorzugsweise fuer den einsatz von arbeitsschutzkabinen bei kraftfahrzeugen mit geregelter und temperierter luftmenge
DE3521000A1 (de) * 1985-06-12 1986-12-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zur beaufschlagung von sensoren mit gleichmaessigem luftvolumen vorzugsweise fuer kraftfahrzeuge
DE3524233A1 (de) * 1985-06-12 1987-01-08 Hoelter Heinz Verfahren zur unmittelbaren beaufschlagung von schadstoffempfindlichen sensoren mit der zu erfassenden luft, vorzugsweise fuer kraftfahrzeuge
EP0392502A2 (fr) * 1989-04-12 1990-10-17 Puritan-Bennett Corporation Méthode et dispositif pour la mesure d'un paramètre d'un gaz isolé de fluctuations dans la tension de gaz

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2212687A1 (de) * 1972-03-16 1973-09-20 Hermann Stark Belueftungseinrichtung fuer den innenraum von fahrzeugen
US4618855A (en) * 1984-12-14 1986-10-21 Genelco, Inc. Soil pollution monitoring system
DE3514588A1 (de) * 1985-04-23 1986-10-23 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Gehaeuse fuer sensoren, vorzugsweise fuer den einsatz von arbeitsschutzkabinen bei kraftfahrzeugen mit geregelter und temperierter luftmenge
DE3521000A1 (de) * 1985-06-12 1986-12-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Verfahren zur beaufschlagung von sensoren mit gleichmaessigem luftvolumen vorzugsweise fuer kraftfahrzeuge
DE3524233A1 (de) * 1985-06-12 1987-01-08 Hoelter Heinz Verfahren zur unmittelbaren beaufschlagung von schadstoffempfindlichen sensoren mit der zu erfassenden luft, vorzugsweise fuer kraftfahrzeuge
EP0392502A2 (fr) * 1989-04-12 1990-10-17 Puritan-Bennett Corporation Méthode et dispositif pour la mesure d'un paramètre d'un gaz isolé de fluctuations dans la tension de gaz

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095983A1 (fr) * 2002-05-10 2003-11-20 Abb Patent Gmbh Procede et dispositif pour prelevement d'echantillons d'air ambiant
US20170122788A1 (en) * 2015-10-29 2017-05-04 Mitsubishi Electric Corporation Flow rate measurement device
US10365142B2 (en) * 2015-10-29 2019-07-30 Mitsubishi Electric Corporation Flow rate measurement device

Also Published As

Publication number Publication date
DE9110325U1 (de) 1992-12-17

Similar Documents

Publication Publication Date Title
DE102017210768B4 (de) Verfahren und Steuerungsvorrichtung zum Betreiben eines Tankentlüftungssystems einer Brennkraftmaschine
DE3830722C2 (fr)
EP1238186B1 (fr) Dispositif pour le retraitement de gaz d'echappement d'un moteur a combustion interne
DE4139946C1 (fr)
DE69106484T2 (de) Einrichtung zum einführen von teilchen von seltenen erden in eine brennkammer.
EP1989419A1 (fr) Turbosoufflante a gaz d'echappement pour un moteur a combustion interne
EP3737919B1 (fr) Dispositif de mesure permettant de déterminer un paramètre d'un fluide s'écoulant à travers un canal d'écoulement de fluide et canal d'écoulement de fluide avec un tel dispositif de mesure
DE3836351C2 (fr)
WO1993004367A1 (fr) Dispositif de mesure pour la detection de substances nocives, en particulier dans l'air frais a amener dans l'habitacle d'un vehicule
EP0685032B1 (fr) Procede et installation de ventilation de reservoir a essence
DE2310056C3 (de) Einrichtung zur Verminderung der Schadstoffemission im Abgas einer Brennkraftmaschine
DE2547546A1 (de) Vorrichtung zum regeln der zusammensetzung der ansaugluft und der auspuffgase eines verbrennungsmotors
US4224914A (en) Fuel injection apparatus
DE3137467A1 (de) Brennkraftmaschine
DE3935612A1 (de) Einer brennkraftmaschine zugeordnete einrichtung zur rueckgewinnung in einem kraftstoffdampffilter gespeicherter kraftstoffdaempfe
DE2314958C2 (de) Luftzuleitungssystem für eine gemischverdichtende, fremdgezündete Brennkraftmaschine
DE102016116588A1 (de) Steuersystem für eine Ozonzufuhrvorrichtung
DE10163781B4 (de) Druckregelventil
EP1426752B1 (fr) Dispositif de contrôle des gaz d'échappement pour moteur à combustion interne
DE19738248A1 (de) Verfahren und Vorrichtung zur Verbesserung der Ölabscheidung aus einem Motorraum einer Brennkraftmaschine
EP1415080B1 (fr) Dispositif de ventilation du reservoir a carburant d'un moteur a combustion interne
WO2002099267A1 (fr) Dispositif permettant de determiner au moins un parametre relatif a un milieu s'ecoulant dans une conduite, dote d'un filtre destine a intercepter les substances nuisibles dans la conduite
DE10018308A1 (de) Verfahren zur Regelung des Anteils der einer Brennkraftmaschine rückgeführten Abgasmenge
DE10255801A1 (de) Tankentlüftungseinrichtung für Kraftfahrzeuge
DE19720642A1 (de) Vorrichtung zur Abgasrückführung für eine Brennkraftmaschine in einem Kraftfahrzeug

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL SE

122 Ep: pct application non-entry in european phase