EP1078237A1 - Radaufhängungstester - Google Patents

Radaufhängungstester

Info

Publication number
EP1078237A1
EP1078237A1 EP99934467A EP99934467A EP1078237A1 EP 1078237 A1 EP1078237 A1 EP 1078237A1 EP 99934467 A EP99934467 A EP 99934467A EP 99934467 A EP99934467 A EP 99934467A EP 1078237 A1 EP1078237 A1 EP 1078237A1
Authority
EP
European Patent Office
Prior art keywords
frequency
excitation
unit
resonance
wheel
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Withdrawn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
EP99934467A
Other languages
German (de)
English (en)
French (fr)
Inventor
Juergen Anlauf
Christian Gern
Uwe Fischer
Reinhard Hoss
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 EP1078237A1 publication Critical patent/EP1078237A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/04—Suspension or damping

Definitions

  • the invention relates to a method for testing the shock absorbers of a motor vehicle, in which a wheel of the motor vehicle is set into an oscillation state with a first high excitation frequency by means of an excitation unit, the resonance frequencies occurring in the frequency range below the excitation frequency being determined and wherein during the oscillation with the resonance frequency dynamic contact force of the wheel is determined and this is related to the static contact force, as well as a device for performing this method.
  • the common wheel suspension testers mainly work according to the EUSAMA standard.
  • a known wheel suspension tester has a platform on which a wheel of a motor vehicle can be parked. The platform is swingingly suspended from a frame.
  • a drive shaft comes from an engine, which carries a flywheel and a cam. The cam sets the frame and thus the platform in a sinusoidal vibration state.
  • the platform is excited to vibrate at a frequency of 24 Hz.
  • the engine is then switched off.
  • the frequency decreases continuously to 3 Hz via the energy stored in the flywheel.
  • the resonance frequency of the wheel suspension can be determined during this swinging out.
  • During the vibration of the platform is over a Force sensor measured the wheel contact force.
  • the minimum contact force at the resonance frequency is related to the static contact force and used as a measure of the condition of the wheel suspension.
  • measured values can only be determined at the resonance point over a very short period of time. Due to the inertia of the system, only imprecise measurement results can be achieved.
  • Resonance frequency (s) are determined in a first measurement sequence, and that the resonance frequency (s) are then generated in a targeted manner by means of a controlled drive of the excitation unit and over a predetermined or predeterminable time unit.
  • the resonance frequencies can be targeted and the associated oscillation can be maintained until meaningful measurement results are available.
  • the lower resonance frequency which is in the range from 0.5 to 3 Hz, can also be specifically controlled. This is crucial for driving safety in practice and cannot be examined by the previously known wheel suspension testers, or only with extreme reliability.
  • a lower resonance frequency in the range from 0.5 to 3 Hz and an upper resonance frequency in the range from 12 to 18 Hz are adjusted with the excitation unit.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
EP99934467A 1998-05-18 1999-05-11 Radaufhängungstester Withdrawn EP1078237A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19823370A DE19823370A1 (de) 1998-05-18 1998-05-18 Radaufhängungstester
DE19823370 1998-05-18
PCT/DE1999/001414 WO1999060365A1 (de) 1998-05-18 1999-05-11 Radaufhängungstester

Publications (1)

Publication Number Publication Date
EP1078237A1 true EP1078237A1 (de) 2001-02-28

Family

ID=7868892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99934467A Withdrawn EP1078237A1 (de) 1998-05-18 1999-05-11 Radaufhängungstester

Country Status (4)

Country Link
EP (1) EP1078237A1 (hu)
DE (1) DE19823370A1 (hu)
HU (1) HUP0101879A3 (hu)
WO (1) WO1999060365A1 (hu)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963556C2 (de) * 1999-12-29 2003-04-10 Bosch Gmbh Robert Prüfvorrichtung für Kraftfahrzeuge
CN115014812B (zh) * 2022-06-14 2023-09-05 吉林大学 一种汽车电动空气悬架硬件在环自动测试平台

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130218A1 (de) * 1971-06-18 1972-12-21 Middeldorf Klaus Pruefeinrichtung,insbesondere fuer mit Stroemungsmitteln gefuellte Stossdaempfer od.dgl.
DE2337411A1 (de) * 1973-07-23 1975-02-06 Volkswagenwerk Ag Verfahren und vorrichtung zum pruefen von stossdaempfern
DE3071395D1 (en) * 1980-10-07 1986-03-13 Kozlekedestudomanyi Intezet Method and device for qualifying the shock absorbers of sprung vehicles equipped with resilient tyres, especially power-driven road vehicles
HUT42180A (en) * 1985-04-18 1987-06-29 Hiradastechnikai Gepgyar Method and apparatus for qualifying shock absorption of the under-carriage
NL9001989A (nl) * 1990-09-10 1992-04-01 Analogic Eng Bv Inrichting voor het beproeven van de wielophanging van een voertuig.
DE4131006A1 (de) * 1991-09-18 1993-03-25 Hofmann Werkstatt Technik Verfahren und vorrichtung zur pruefung der fahrsicherheit eines kraftfahrzeugs
DE19519136C1 (de) * 1995-05-30 1996-08-01 Fichtel & Sachs Ag Stoßdämpferprüfgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9960365A1 *

Also Published As

Publication number Publication date
HUP0101879A2 (hu) 2001-10-28
DE19823370A1 (de) 1999-12-09
HUP0101879A3 (en) 2002-02-28
WO1999060365A1 (de) 1999-11-25

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