ES383645A1 - Pressure difference indicating system - Google Patents

Pressure difference indicating system

Info

Publication number
ES383645A1
ES383645A1 ES383645A ES383645A ES383645A1 ES 383645 A1 ES383645 A1 ES 383645A1 ES 383645 A ES383645 A ES 383645A ES 383645 A ES383645 A ES 383645A ES 383645 A1 ES383645 A1 ES 383645A1
Authority
ES
Spain
Prior art keywords
piezo
pressures
lead
control unit
pressure
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
Application number
ES383645A
Other languages
Spanish (es)
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of ES383645A1 publication Critical patent/ES383645A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/226—Devices for monitoring or checking brake systems; Signal devices using devices being responsive to the difference between the fluid pressions in conduits of multiple braking systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/403—Brake circuit failure

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

A warning arrangement for indicating a difference in pressure between two normally equal independent pressures, such as the pressures 14, 16 of a split fluid pressure braking system, comprises two diaphragms 32, 32a influenced by the two pressures and acting, through projections 46, 46a, on piezo-electric elements 42, 42a. These are of equal but opposite construction and are connected to a common output lead 20 whose potential is normally zero. Should a substantial difference in pressure occur, the potential arising on lead 20 operates a control unit 24 to actuate a warning device 30. The control unit 24 may comprise a thyristor operated directly (Fig. 4, not shown) or via a field effect transistor (Fig. 3, not shown). The two separate units 18, 18a may be replaced by a single unit (Fig. 2, not shown) in which the piezo-electric elements act as a divider. As shown, a vehicle brake pedal 10, a master cylinder 12, and an ignition switch 28 are provided. Each piezo-electric element 42, or 42a, comprises two layers of lead zirconate titanate bonded together and polarized in the senses shown.
ES383645A 1969-09-15 1970-09-15 Pressure difference indicating system Expired ES383645A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85805969A 1969-09-15 1969-09-15

Publications (1)

Publication Number Publication Date
ES383645A1 true ES383645A1 (en) 1973-02-16

Family

ID=25327383

Family Applications (1)

Application Number Title Priority Date Filing Date
ES383645A Expired ES383645A1 (en) 1969-09-15 1970-09-15 Pressure difference indicating system

Country Status (7)

Country Link
JP (1) JPS4836631B1 (en)
AU (1) AU1962870A (en)
CA (1) CA921278A (en)
DE (1) DE2044507A1 (en)
ES (1) ES383645A1 (en)
FR (1) FR2061307A5 (en)
GB (1) GB1260782A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5029431U (en) * 1973-07-09 1975-04-03
JPS5030531U (en) * 1973-07-13 1975-04-05
JPS54137234U (en) * 1978-03-17 1979-09-22
JPS54144955U (en) * 1978-03-31 1979-10-08
JPS58136578U (en) * 1982-03-08 1983-09-13 永大産業株式会社 building materials
DE3427758A1 (en) * 1984-07-24 1986-01-30 Siemens AG, 1000 Berlin und 8000 München ELECTRICAL MACHINE WITH MONITORING OF THE LIQUID COOLING CIRCUIT
CN110410384B (en) * 2019-09-01 2024-03-08 宋彦宏 Incoming oil measurement indicator of hydraulic pipeline and detection method

Also Published As

Publication number Publication date
DE2044507A1 (en) 1971-04-15
FR2061307A5 (en) 1971-06-18
GB1260782A (en) 1972-01-19
JPS4836631B1 (en) 1973-11-06
AU1962870A (en) 1972-03-09
CA921278A (en) 1973-02-20

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