EP0463353B1 - Système de commande pneumatique - Google Patents

Système de commande pneumatique Download PDF

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Publication number
EP0463353B1
EP0463353B1 EP91108072A EP91108072A EP0463353B1 EP 0463353 B1 EP0463353 B1 EP 0463353B1 EP 91108072 A EP91108072 A EP 91108072A EP 91108072 A EP91108072 A EP 91108072A EP 0463353 B1 EP0463353 B1 EP 0463353B1
Authority
EP
European Patent Office
Prior art keywords
pressure
subassembly
control unit
pressure sensor
consumers
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.)
Expired - Lifetime
Application number
EP91108072A
Other languages
German (de)
English (en)
Other versions
EP0463353A1 (fr
Inventor
Klaus Dipl.-Ing. Kiefer
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 EP0463353A1 publication Critical patent/EP0463353A1/fr
Application granted granted Critical
Publication of EP0463353B1 publication Critical patent/EP0463353B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2657—Details with different switches operated at substantially different pressures

Definitions

  • the invention is based on a pneumatic control system according to the preamble of claim 1.
  • the connected systems that is to say the consumers, are each assigned pressure switches.
  • these pressure switches must be specially matched to the individual systems, so that there is a large number of components to be used. Due to the tolerances of the components of the switches, each switch must be adjusted individually. There are also many hand soldering points that prevent assembly-friendly manufacture. If a pressure switch is responsible for several consumers, it has several fixed switching points. The arrangement of the solenoid valves downstream of the pressure switches creates a throttling effect that causes different switching points for the consumers. Replacing the pressure switches with sensors would not reduce the assembly effort.
  • a multiple pressure sensor is known from DE-U 7 718 250 and the corresponding FR-A-23 94 167, in which a plurality of pressure sensors (15) are formed in a common housing.
  • each pressure transducer is completely separate from one another in terms of its effectiveness. This is a pressure switch for connection to independent pressure transmission systems which are assigned to the individual switching mechanisms.
  • the pneumatic control system according to the invention with the characterizing features of claim 1 has the advantage that the control system is particularly inexpensive and easy to install can be produced.
  • the use of a multiple pressure sensor manufactured as a built-in part results in a 2 to 2.5-fold reduction in price compared to the use of individual sensors. Due to the compact design, only a small amount of space is required for the pressure sensor on the circuit board for the electronic evaluation circuit. Furthermore, the arrangement of the pressure sensor on the circuit board of the evaluation circuit eliminates the need for individual soldering processes.
  • the board can be brazed in a wave in a single, simple assembly step.
  • FIG. 1 shows a block diagram of the pneumatic switchgear in a schematic representation
  • FIG. 2 shows a section through a multiple pressure sensor.
  • 10 denotes a printed circuit board which consists of an electrically non-conductive material.
  • a ceramic or plastic plate can be used for this.
  • a multiple pressure sensor 11, as is shown in more detail by way of example in FIG. 2, is arranged on the printed circuit board 10 and is integrated in an operational amplifier 12.
  • the operational amplifier 12 also has a PTC resistor 13, that is to say a resistor made of a material with a positive temperature coefficient, for temperature compensation.
  • a bus 14 leads from the operational amplifier 12, the connecting lines corresponding to the number of the individual Sensor of the multiple pressure sensor 11 has, to an analog / digital (A / D) converter 15, which is integrated in a microcomputer 16. All components 11 to 16 are arranged on the printed circuit board 10.
  • the electrical connection contacts 19 for the electrical connection lines 20 of solenoid valves 21 are located on the printed circuit board 10 in the area of the microcomputer 16.
  • the solenoid valves 21 are fastened on a conventionally known base plate 22, which is used to control the compressed air from a bidirectional pump 23 (not shown) Channels in the base plate 22 serve the consumers.
  • the connections 24 for the lines leading to the consumers are shown on the base plate 22 in FIG.
  • consumers, for. B. be connected central locking, orthopedic backrest, headlight range control, climate flap control.
  • a bi-pressure pump 23 is a commercially available feed pump for compressed air, which can deliver in both directions of rotation of the pump. As a result, an overpressure and an underpressure can be generated in a system connected to the base plate 22.
  • connection 25a, 25b for a so-called closed system are also present on the base plate 22. This is a system in which pressure fluctuations can be compensated for with the help of accumulators.
  • the connection 25a is therefore designated as P + as the positive pressure connection and the connection 25b as P- as the negative pressure connection.
  • the solenoid valves 21 are shown as examples in FIG. 1 as 3/2-way valves.
  • the control of the individual solenoid valves 21 is carried out in a known manner via the series-connected electromagnets of the solenoid valves 21 against the force of a return spring 27.
  • Pressure lines lead from the base plate 22 to the individual transducers of the multiple pressure sensor 11.
  • a pressure line 30 connected to the transducer 11a is provided for pressure detection of the consumers which can be controlled simultaneously or individually by means of the solenoid valves 21.
  • a pressure line 31 for detecting the overpressure P + in the closed system and a pressure line 32 for detecting the underpressure P- in the closed system lead to the two other individual sensors 11b and 11c of the multiple pressure sensor 11.
  • the illustration with three individual sensors is only intended as an example .
  • the multiple pressure sensor 11 is shown in more detail in FIG. 2 in a longitudinal section. It has a common housing 35, which is divided into reference chambers 37 by partitions 36 according to the number of individual transducers 11a to 11c.
  • the reference chambers 37 are covered by a membrane 38 which can be applied to the openings of the reference chambers 37 in one operation.
  • the pressure to be determined in each case acts on the membrane 38, i. H. the pressure in the consumers or P + or P- in the closed system against the reference pressures prevailing in the reference chambers 37.
  • Contact pins 40 which are operatively connected to the membrane 38 are fastened in the housing base 39, the electrical lines 41 of which are led through the housing base 39 to the operational amplifier 12.
  • the decisive factor is the pressure detection with the aid of a multiple sensor, with several individual sensors being arranged in one component to save space. Furthermore, the multiple pressure sensor is attached directly to the printed circuit board 10 of the evaluation circuit in an assembly-friendly manner.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Control Of Fluid Pressure (AREA)

Claims (3)

  1. Système de commande pneumatique avec au moins une source de fluide sous pression (23), plusieurs distributeurs (21) susceptibles d'être commandés et qui contrôlent le fluide sous pression vers plusieurs utilisateurs, et avec plusieurs capteurs de pression (11a à 11c), système de commande pneumatique caractérisé en ce que les capteurs de pression (11a à 11c) font partie d'un détecteur de pression multiple dans une partie constitutive (35) comportant plusieurs surfaces (38) de mesure de la pression, et en ce que cette partie constitutive (35) se trouve sur la plaque de circuit imprimé (10) d'un circuit d'exploitation.
  2. Système de commande pneumatique selon la revendication 1, caractérisé en ce que la partie constitutive (35) comporte plusieurs chambres de pression de référence (37) qui sont fermées par des membranes (38) jouant le rôle de surfaces de mesure de la pression.
  3. Système de commande pneumatique selon la revendication 1 et/ou la revendication 2, caractérisé en ce que le circuit d'exploitation comporte un amplificateur opérationnel (12), un convertisseur analogique/numérique (15) et un micro-ordinateur (16) pour commander les distributeurs (21) et la source de fluide sous pression (23).
EP91108072A 1990-06-23 1991-05-18 Système de commande pneumatique Expired - Lifetime EP0463353B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020108 1990-06-23
DE4020108A DE4020108A1 (de) 1990-06-23 1990-06-23 Pneumatische steueranlage

Publications (2)

Publication Number Publication Date
EP0463353A1 EP0463353A1 (fr) 1992-01-02
EP0463353B1 true EP0463353B1 (fr) 1993-07-28

Family

ID=6408981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108072A Expired - Lifetime EP0463353B1 (fr) 1990-06-23 1991-05-18 Système de commande pneumatique

Country Status (3)

Country Link
EP (1) EP0463353B1 (fr)
DE (2) DE4020108A1 (fr)
ES (1) ES2043406T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4135931C1 (en) * 1991-10-31 1993-04-15 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Pressure supply system for providing positioning elements with differing pressures - has controllable compressor connected to elements via feed line, pressure sensor and control switches
DE19958912A1 (de) 1999-12-07 2001-06-28 Bosch Gmbh Robert Fahrzeugpneumatik-Überdruckreglerschaltung
CN106958549B (zh) * 2017-03-20 2019-01-15 东莞市泽森自动化设备有限公司 齐头气动集成系统及其气动模组

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558458A1 (de) * 1975-12-23 1977-07-07 Schubert & Salzer Maschinen Elektro - pneumatischer wandler
DE7718250U1 (de) * 1977-06-10 1978-11-30 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Elektrischer Druckschalter
DE3400945A1 (de) * 1984-01-13 1985-07-25 Robert Bosch Gmbh, 7000 Stuttgart Zentralverriegelungsanlage eines kraftfahrzeugs

Also Published As

Publication number Publication date
DE59100222D1 (de) 1993-09-02
ES2043406T3 (es) 1993-12-16
DE4020108C2 (fr) 1993-06-17
DE4020108A1 (de) 1992-01-09
EP0463353A1 (fr) 1992-01-02

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