FR2293736A1 - Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676) - Google Patents

Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676)

Info

Publication number
FR2293736A1
FR2293736A1 FR7439380A FR7439380A FR2293736A1 FR 2293736 A1 FR2293736 A1 FR 2293736A1 FR 7439380 A FR7439380 A FR 7439380A FR 7439380 A FR7439380 A FR 7439380A FR 2293736 A1 FR2293736 A1 FR 2293736A1
Authority
FR
France
Prior art keywords
inlet
valves
eve
eva
error
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.)
Granted
Application number
FR7439380A
Other languages
French (fr)
Other versions
FR2293736B1 (en
Inventor
Marcel Bieder
Raymond Lavenu
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.)
Wabco Westinghouse SA
Original Assignee
Wabco Westinghouse SA
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 Wabco Westinghouse SA filed Critical Wabco Westinghouse SA
Priority to FR7439380A priority Critical patent/FR2293736A1/en
Priority to DE19752553515 priority patent/DE2553515A1/en
Priority to BE6045276A priority patent/BE836200A/en
Publication of FR2293736A1 publication Critical patent/FR2293736A1/en
Application granted granted Critical
Publication of FR2293736B1 publication Critical patent/FR2293736B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/2046—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a single pressure from a plurality of converging pressures
    • G05D16/2053—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a single pressure from a plurality of converging pressures the plurality of throttling means comprising only a first throttling means acting on a higher pressure and a second throttling means acting on a lower pressure, e.g. the atmosphere
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/204—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in parallel

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)
  • Flow Control (AREA)

Abstract

The precise control of pressure within a container is achieved by continuous pulsing of inlet and outlet solenoid valves operating about average value levels. A comparator (1) operates upon a preset reference level signal (Vc) and a feedback signal from a pressure transducer (2). A signal generator (3) produces a triangular wave output of constant frequency that is amplified (4) before transmission to an adder circuit (5). The adder circuit output is of variable d.c. level with the triangular wave from superimposed and is used to drive inlet solenoid valves (EVA, EVA') and outlet valves (EVE, EVE') coupled to the pressure container (C). In operation two valves (EVA, EVE) are set to respond to a higher level than the other valves to operate when large erras exist.
FR7439380A 1974-12-02 1974-12-02 Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676) Granted FR2293736A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7439380A FR2293736A1 (en) 1974-12-02 1974-12-02 Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676)
DE19752553515 DE2553515A1 (en) 1974-12-02 1975-11-28 METHOD AND DEVICE FOR THE CONTROL OF INLET AND EXHAUST VALVES
BE6045276A BE836200A (en) 1974-12-02 1975-12-02 METHOD AND DEVICE FOR REGULATING A PRESSURE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7439380A FR2293736A1 (en) 1974-12-02 1974-12-02 Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676)

Publications (2)

Publication Number Publication Date
FR2293736A1 true FR2293736A1 (en) 1976-07-02
FR2293736B1 FR2293736B1 (en) 1978-07-13

Family

ID=9145453

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7439380A Granted FR2293736A1 (en) 1974-12-02 1974-12-02 Inlet and outlet valve control arrangement - uses DC error signal with superimposed triangular waveform to minimise operating error (BE020676)

Country Status (3)

Country Link
BE (1) BE836200A (en)
DE (1) DE2553515A1 (en)
FR (1) FR2293736A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811345A1 (en) * 1978-03-16 1979-09-27 Knorr Bremse Gmbh PRESSURE REGULATOR FOR PNEUMATIC PRESSURES, ESPECIALLY IN VEHICLES
EP0014369A1 (en) * 1979-01-22 1980-08-20 Knorr-Bremse Ag Pressure control system for pneumatic vehicle brakes, in particular of rail vehicles
DE3502276A1 (en) * 1985-01-24 1986-07-24 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover DEVICE FOR CONTINUOUSLY CONTROLLING A SOLENOID VALVE DESIGNED NORMALLY FOR DISCONTINUOUS OPERATION
EP0207275A2 (en) * 1985-06-14 1987-01-07 Knorr-Bremse Ag Assisting and locking brake for utility vehicles
FR2605572A1 (en) * 1986-10-24 1988-04-29 Knorr Bremse Ag Brake cylinder pressure controller for vehicle
US4947734A (en) * 1987-04-20 1990-08-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Method of duty-ratio control for hydraulically actuated slip control lock-up clutch and transmission
WO2013144598A1 (en) * 2012-03-26 2013-10-03 Norgren Limited Pressure control valve manifold

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4550747A (en) * 1983-10-05 1985-11-05 Digital Hydraulics, Inc. Digital fluid pressure flow rate and position control system
DE3812672C2 (en) * 1987-04-20 1995-09-28 Mitsubishi Motors Corp Hydraulic control method for a hydraulically actuated load
JPH02280206A (en) * 1989-04-21 1990-11-16 Eishin Giken:Kk Pressure setter
CN111857200B (en) * 2020-08-11 2024-07-30 安徽万瑞冷电科技有限公司 Helium pressure control system and control method for superconducting test piece during test

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811345A1 (en) * 1978-03-16 1979-09-27 Knorr Bremse Gmbh PRESSURE REGULATOR FOR PNEUMATIC PRESSURES, ESPECIALLY IN VEHICLES
FR2420158A1 (en) * 1978-03-16 1979-10-12 Knorr Bremse Gmbh PRESSURE REGULATOR FOR PNEUMATIC PRESSURES ESPECIALLY FOR VEHICLES
EP0014369A1 (en) * 1979-01-22 1980-08-20 Knorr-Bremse Ag Pressure control system for pneumatic vehicle brakes, in particular of rail vehicles
DE3502276A1 (en) * 1985-01-24 1986-07-24 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover DEVICE FOR CONTINUOUSLY CONTROLLING A SOLENOID VALVE DESIGNED NORMALLY FOR DISCONTINUOUS OPERATION
US4887636A (en) * 1985-01-24 1989-12-19 Wabco Westinghouse Fahrzeugbremsen Gmbh Apparatus for the continuous control of solenoid valves which are normally designed for intermittent operation
EP0207275A2 (en) * 1985-06-14 1987-01-07 Knorr-Bremse Ag Assisting and locking brake for utility vehicles
EP0207275A3 (en) * 1985-06-14 1988-05-25 Knorr-Bremse Ag Assisting and locking brake for utility vehicles
FR2605572A1 (en) * 1986-10-24 1988-04-29 Knorr Bremse Ag Brake cylinder pressure controller for vehicle
US4947734A (en) * 1987-04-20 1990-08-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Method of duty-ratio control for hydraulically actuated slip control lock-up clutch and transmission
WO2013144598A1 (en) * 2012-03-26 2013-10-03 Norgren Limited Pressure control valve manifold

Also Published As

Publication number Publication date
BE836200A (en) 1976-06-02
FR2293736B1 (en) 1978-07-13
DE2553515A1 (en) 1976-06-10

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Legal Events

Date Code Title Description
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