FR2387401A1 - Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength - Google Patents

Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength

Info

Publication number
FR2387401A1
FR2387401A1 FR7710921A FR7710921A FR2387401A1 FR 2387401 A1 FR2387401 A1 FR 2387401A1 FR 7710921 A FR7710921 A FR 7710921A FR 7710921 A FR7710921 A FR 7710921A FR 2387401 A1 FR2387401 A1 FR 2387401A1
Authority
FR
France
Prior art keywords
valve
strength
hydraulic pressure
pressure switch
controlled pump
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
FR7710921A
Other languages
French (fr)
Other versions
FR2387401B1 (en
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.)
Automobiles Citroen SA
Original Assignee
Automobiles Citroen 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 Automobiles Citroen SA filed Critical Automobiles Citroen SA
Priority to FR7710921A priority Critical patent/FR2387401A1/en
Priority to DE19782813858 priority patent/DE2813858A1/en
Publication of FR2387401A1 publication Critical patent/FR2387401A1/en
Application granted granted Critical
Publication of FR2387401B1 publication Critical patent/FR2387401B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

the hydraulic automatic switch (1) acting between a pump and a pressure vessel to maintain the pressure therein between two specific limits. It comprises a check valve in the duct (7) to the vessel, and a return line from upstream of this valve to the pump suction. A piston valve (27) is spring-loaded (46) on one side and pressure-loaded from downstream of the check valve on the other, and controls opening and closing of the return line. A disc spring (4a) connected to the valve piston (27) provides rapid bi-stable action thereof. The Young's modulus of this disc (19) is below 10,000 da N/m2 and the yield point is as high as this condition permits.
FR7710921A 1977-04-12 1977-04-12 Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength Granted FR2387401A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7710921A FR2387401A1 (en) 1977-04-12 1977-04-12 Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength
DE19782813858 DE2813858A1 (en) 1977-04-12 1978-03-31 HYDRAULIC SELF SWITCH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7710921A FR2387401A1 (en) 1977-04-12 1977-04-12 Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength

Publications (2)

Publication Number Publication Date
FR2387401A1 true FR2387401A1 (en) 1978-11-10
FR2387401B1 FR2387401B1 (en) 1981-12-31

Family

ID=9189291

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7710921A Granted FR2387401A1 (en) 1977-04-12 1977-04-12 Hydraulic pressure switch with suction controlled pump return - using valve switched by bistable spring with defined Young module and strength

Country Status (2)

Country Link
DE (1) DE2813858A1 (en)
FR (1) FR2387401A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433658A1 (en) * 1978-08-17 1980-03-14 Lucas Industries Ltd IMPROVEMENTS IN HYDRAULIC SYSTEMS OF VEHICLES OR THE LIKE
FR2670169A1 (en) * 1990-12-07 1992-06-12 Valeo DEVICE FOR OPERATING MEANS OF A PLANT FOR A MOTOR VEHICLE WITH POWER-ASSISTED HYDRAULIC STEERING.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19744577A1 (en) * 1997-10-09 1999-04-22 Bosch Gmbh Robert Radial piston pump for high pressure fuel supply in motor vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433658A1 (en) * 1978-08-17 1980-03-14 Lucas Industries Ltd IMPROVEMENTS IN HYDRAULIC SYSTEMS OF VEHICLES OR THE LIKE
FR2670169A1 (en) * 1990-12-07 1992-06-12 Valeo DEVICE FOR OPERATING MEANS OF A PLANT FOR A MOTOR VEHICLE WITH POWER-ASSISTED HYDRAULIC STEERING.
US5293952A (en) * 1990-12-07 1994-03-15 Valeo Hydraulic fluid supply system for an installation in a motor vehicle having power assisted steering with a pressure regulation value connected to the main and secondary circuits

Also Published As

Publication number Publication date
DE2813858A1 (en) 1978-10-19
FR2387401B1 (en) 1981-12-31

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Legal Events

Date Code Title Description
CA Change of address
ST Notification of lapse