DE3942343A1 - Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes - Google Patents

Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes

Info

Publication number
DE3942343A1
DE3942343A1 DE19893942343 DE3942343A DE3942343A1 DE 3942343 A1 DE3942343 A1 DE 3942343A1 DE 19893942343 DE19893942343 DE 19893942343 DE 3942343 A DE3942343 A DE 3942343A DE 3942343 A1 DE3942343 A1 DE 3942343A1
Authority
DE
Germany
Prior art keywords
pressure
pressure changes
temp
rate
sensor
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.)
Withdrawn
Application number
DE19893942343
Other languages
German (de)
Inventor
Manfred Dipl Ing Meissner
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
Priority to DE19893942343 priority Critical patent/DE3942343A1/en
Publication of DE3942343A1 publication Critical patent/DE3942343A1/en
Withdrawn legal-status Critical Current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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/002—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by thermal means, e.g. hypsometer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/001—Temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A method of detecting the variation in the pressure of a medium involves measuring the temp. of the medium and then determining the variation in the pressure from the known and stored relationship between the temp. and the rate of change of pressure. The pressure can then be derived by integrating the rate of change of pressure. USE/ADVANTAGE - Determining braking pressure in motor vehicle ABS and ASR braking systems. Cost of obtaining pressure information is low since the temp. sensor is relatively cheap and the derivation costs lie in the software.

Description

Stand der TechnikState of the art

Zum Beispiel bei ABS, ASR und auch geregelten Sperren wäre die Verwendung von Drucksensoren zur Bestimmung des Bremsdrucks für die Verbesserung der Regelgüte angezeigt. Diese sind jedoch teuer, so daß man auf eine Druckmessung meist verzichtet.For example with ABS, ASR and also regulated locks would be the use of pressure sensors for determining the brake pressure for the Improvement in the control quality is displayed. However, these are expensive so that you usually do without a pressure measurement.

Vorteile der ErfindungAdvantages of the invention

Da der Temperatursensor vergleichsweise billig ist und der Auswerteaufwand z. B. hauptsächlich in der Software liegt, wird die Information über den Druck mit billigen Mitteln gewonnen. Es gilt für den im Speicher abzulegenden ZusammenhangSince the temperature sensor is comparatively cheap and the evaluation effort e.g. B. lies mainly in the software, the information won over printing with cheap means. It applies to the relationship to be stored in memory

hierin sind
P Druck im Arbeitszylinder
T Temperatur
t Zeit
n Viscosität
dp/dt Druckanstiegsrate
D Drosselquerschnitt
L Länge des Drosselkanals
R Oberflächenrauhigkeitare in here
P pressure in the working cylinder
T temperature
t time
n viscosity
dp / dt pressure rise rate
D Throttle cross section
L length of the throttle channel
R surface roughness

Die letzten drei Größen sind für ein gegebenes System konstant.The last three sizes are constant for a given system.

Der Druck und die Viskosität sind von der Temperatur T und der Zeit t abhängig. Die Temperatur geht somit über zwei Größen in den Zusammenhang zwischen Druckänderung und Temperatur ein. Den Druck selbst erhält man durch die Integration der Druckänderungen.The pressure and viscosity are of temperature T and Time t dependent. The temperature thus goes over two sizes in the Relationship between pressure change and temperature. The pressure you get yourself by integrating the pressure changes.

Claims (2)

1. Verfahren zur Bestimmung der Druckänderung eines Mediums, dadurch gekennzeichnet, daß die Temperatur des Mediums gemessen wird und daß aus dem ermittelten und abgespeicherten Zusammenhang zwischen der Druckänderung dp/dt und der Temperatur die Druckänderung ermittelt wird.1. A method for determining the pressure change of a medium, characterized in that the temperature of the medium is measured and that the pressure change is determined from the determined and stored relationship between the pressure change dp / dt and the temperature. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch Integration aus der Druckänderung der Druck ermittelt wird.2. The method according to claim 1, characterized in that by Integration from the pressure change the pressure is determined.
DE19893942343 1989-12-21 1989-12-21 Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes Withdrawn DE3942343A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893942343 DE3942343A1 (en) 1989-12-21 1989-12-21 Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893942343 DE3942343A1 (en) 1989-12-21 1989-12-21 Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes

Publications (1)

Publication Number Publication Date
DE3942343A1 true DE3942343A1 (en) 1991-06-27

Family

ID=6396056

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893942343 Withdrawn DE3942343A1 (en) 1989-12-21 1989-12-21 Measuring pressure changes e.g. in ABS ASR braking systems - using relative cheap temp. sensor and software derivation of rate of pressure changes

Country Status (1)

Country Link
DE (1) DE3942343A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703131A1 (en) * 1994-09-20 1996-03-27 Nippondenso Co., Ltd. Kinetic characteristic control system for vehicle
WO2002040321A1 (en) * 2000-11-18 2002-05-23 Robert Bosch Gmbh Device and method for side-impact identification
WO2003066385A1 (en) * 2002-02-09 2003-08-14 Robert Bosch Gmbh Front sensor of a vehicle
CN108843699A (en) * 2018-08-13 2018-11-20 倪其棍 A kind of dedicated normal-close clutch device device of new energy vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332286A (en) * 1965-09-02 1967-07-25 Gen Electric Thermocouple pressure gauge
DE2444856A1 (en) * 1974-09-19 1976-04-01 Siemens Ag Extended relaxation time used to find parameter value in rapid process - this parameter being functionally linked to a second measurable parameter having short relaxation time
DE1924469B2 (en) * 1968-05-17 1978-10-26 General Electric Co., Schenectady, N.Y. (V.St.A.) Device for determining the pressure of a pressure chamber of a high pressure apparatus that can be exposed to high pressure and high temperatures
EP0110872B1 (en) * 1982-12-06 1988-05-11 ELIN-UNION Aktiengesellschaft für elektrische Industrie Hypsometer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332286A (en) * 1965-09-02 1967-07-25 Gen Electric Thermocouple pressure gauge
DE1924469B2 (en) * 1968-05-17 1978-10-26 General Electric Co., Schenectady, N.Y. (V.St.A.) Device for determining the pressure of a pressure chamber of a high pressure apparatus that can be exposed to high pressure and high temperatures
DE2444856A1 (en) * 1974-09-19 1976-04-01 Siemens Ag Extended relaxation time used to find parameter value in rapid process - this parameter being functionally linked to a second measurable parameter having short relaxation time
EP0110872B1 (en) * 1982-12-06 1988-05-11 ELIN-UNION Aktiengesellschaft für elektrische Industrie Hypsometer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Soviet Inventions Illustrated, R1, p 20, SU-492-769 v. 25.08.76 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703131A1 (en) * 1994-09-20 1996-03-27 Nippondenso Co., Ltd. Kinetic characteristic control system for vehicle
US5806010A (en) * 1994-09-20 1998-09-08 Nippondenso Co., Ltd. Kinetic characteristic control system for vehicle
WO2002040321A1 (en) * 2000-11-18 2002-05-23 Robert Bosch Gmbh Device and method for side-impact identification
US6725961B2 (en) 2000-11-18 2004-04-27 Robert Bosch Gmbh Device and method for side-impact identification
WO2003066385A1 (en) * 2002-02-09 2003-08-14 Robert Bosch Gmbh Front sensor of a vehicle
CN100335314C (en) * 2002-02-09 2007-09-05 罗伯特-博希股份公司 Front sensor of a vehicle
US7445072B2 (en) 2002-02-09 2008-11-04 Robert Bosch Gmbh Vehicle upfront sensor
CN108843699A (en) * 2018-08-13 2018-11-20 倪其棍 A kind of dedicated normal-close clutch device device of new energy vehicle

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee