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IT1247985B - PNEUMATIC SPRING WITH Switchable stiffness - Google Patents

PNEUMATIC SPRING WITH Switchable stiffness

Info

Publication number
IT1247985B
IT1247985B ITMI911541A ITMI911541A IT1247985B IT 1247985 B IT1247985 B IT 1247985B IT MI911541 A ITMI911541 A IT MI911541A IT MI911541 A ITMI911541 A IT MI911541A IT 1247985 B IT1247985 B IT 1247985B
Authority
IT
Italy
Prior art keywords
bellows
air chamber
stiffness
level
spring
Prior art date
Application number
ITMI911541A
Other languages
Italian (it)
Inventor
Ortwin Engfer
Original Assignee
Bosch Gmbh Robert
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 Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Publication of ITMI911541A0 publication Critical patent/ITMI911541A0/en
Publication of ITMI911541A1 publication Critical patent/ITMI911541A1/en
Application granted granted Critical
Publication of IT1247985B publication Critical patent/IT1247985B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B60G17/01933—Velocity, e.g. relative velocity-displacement sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/048—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics with the regulating means inside the fluid springs
    • B60G17/0485—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics with the regulating means inside the fluid springs the springs being pneumatic springs with a flexible wall, e.g. with levelling valves
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/049—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall multi-chamber units
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/154—Fluid spring with an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/412—Pneumatic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B60G2204/111—Mounting of sensors thereon on pneumatic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25—Stroke; Height; Displacement
    • B60G2400/252—Stroke; Height; Displacement vertical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/20—Spring action or springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

L'invenzione riguarda una molla pneumatica (1) con rigidezza commutabile, laddove una camera d'aria principale (3), delimitata da un soffietto (2) arrotolabile, esternamente con vincolo geometrico è circondata da una camera d'aria supplementare (5) con pareti rigide. In tal modo si ottiene una modalità costruttiva piatta. La parete interna (6) della camera d'aria supplementare (5) possiede caratteristiche di guida e di sostegno per il soffietto arrotolabile (2). In tal modo è possibile una riduzione della rigidezza propria del soffietto arrotolabile (2) e il diametro attivo varia solo in modo irrilevante in dipendenza della pressione del soffietto. Inoltre la molla pneumatica può sostenere anche determinate forze laterali. In una forma di realizzazione preferita per adattare la rigidezza della molla nella camera d'aria principale (3) è introdotto liquido, il cui livello (linee 9, 10 e 11) viene rilevato da un sensore di livello (22). In tal modo è possibile sorvegliare il livello del liquido e si ottiene un segnale per la corsa elastica momentaneamente applicata per l'ulteriore elaborazione in una regolazione di livello o regolazione di rollio (figura 2).The invention relates to an pneumatic spring (1) with switchable stiffness, whereas a main air chamber (3), delimited by a bellows (2) that can be rolled up, externally with geometric constraint is surrounded by an additional air chamber (5) with rigid walls. This results in a flat construction mode. The inner wall (6) of the additional air chamber (5) has guiding and supporting characteristics for the roll-up bellows (2). In this way, a reduction in the stiffness of the rollable bellows (2) is possible and the active diameter varies only irrelevantly depending on the pressure of the bellows. In addition, the air spring can also support certain lateral forces. In a preferred embodiment, liquid is introduced into the main air chamber (3) to adapt the stiffness of the spring, the level of which (lines 9, 10 and 11) is detected by a level sensor (22). In this way it is possible to monitor the liquid level and obtain a signal for the elastic travel momentarily applied for further processing in a level adjustment or roll adjustment (Figure 2).

ITMI911541A 1990-06-12 1991-06-05 PNEUMATIC SPRING WITH Switchable stiffness IT1247985B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4018712A DE4018712A1 (en) 1990-06-12 1990-06-12 Air spring with variable stiffness for motor vehicle - has rigid-walled auxiliary air chamber surrounding main air chamber adjusted by level of liq. filling

Publications (3)

Publication Number Publication Date
ITMI911541A0 ITMI911541A0 (en) 1991-06-05
ITMI911541A1 ITMI911541A1 (en) 1992-12-05
IT1247985B true IT1247985B (en) 1995-01-05

Family

ID=6408215

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI911541A IT1247985B (en) 1990-06-12 1991-06-05 PNEUMATIC SPRING WITH Switchable stiffness

Country Status (3)

Country Link
DE (1) DE4018712A1 (en)
FR (1) FR2663100B1 (en)
IT (1) IT1247985B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7641028B2 (en) 2002-06-25 2010-01-05 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US7963509B2 (en) 2007-01-31 2011-06-21 Fox Factory, Inc. Travel control for a gas spring and gas spring having very short travel modes
US8464850B2 (en) 2006-11-16 2013-06-18 Fox Factory, Inc. Gas spring curve control in an adjustable-volume gas-pressurized device
US9415653B2 (en) 2002-06-25 2016-08-16 Fox Factory, Inc. Gas spring with travel control
US10941828B2 (en) 2002-06-25 2021-03-09 Fox Factory, Inc. Gas spring with travel control

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204939C2 (en) * 1992-02-19 1999-05-20 Continental Ag Air spring or air spring damper unit with an air bellows made of elastomeric material
DE4238790C2 (en) * 1992-11-17 1996-07-25 Daimler Benz Ag Air suspension unit
FR2715108B1 (en) * 1994-01-17 1996-04-05 Peugeot Suspension device for a motor vehicle.
DE19704433C2 (en) * 1997-02-06 2001-06-13 Daimler Chrysler Ag Air spring with a variable air chamber delimited by a roller bellows for cushioning the wheels of motor vehicles
DE19710399C2 (en) * 1997-03-13 1999-05-20 Continental Ag Arrangement with an air spring and an additional volume
WO2000075527A1 (en) * 1999-06-09 2000-12-14 Speirs Robertson And Company Limited Low profile damped air filled vibration isolator
RU2150622C1 (en) * 1999-07-09 2000-06-10 Орловский государственный технический университет Intermittent shock absorber
DE19961719A1 (en) 1999-12-21 2001-07-05 Daimler Chrysler Ag Spring damper system with hose bellows
US6402128B1 (en) 2000-01-31 2002-06-11 The Goodyear Tire And Rubber Company Air spring with lateral restraint and axial control
DE10025749C1 (en) * 2000-05-24 2001-10-31 Continental Ag Valve used in vehicle pneumatic springs, comprises a star-shaped nozzle having a valve seat and concentric arms having a specified length and width
DE10126458C2 (en) * 2001-05-31 2003-06-12 Daimler Chrysler Ag Tightness and functional testing of a check valve in a pneumatic suspension
US6698730B2 (en) 2001-10-04 2004-03-02 Bfs Diversified Products, Llc Dual rate air spring
DE10257009A1 (en) * 2002-12-06 2004-06-17 Continental Aktiengesellschaft Air spring cover with extra volume and method for its production
DE10319568B4 (en) * 2003-04-30 2006-11-23 Man Nutzfahrzeuge Ag Air spring for a motor vehicle
DE102007060102A1 (en) 2007-12-13 2009-06-18 Continental Aktiengesellschaft Suspension device of a wheeled vehicle
DE102007060703A1 (en) 2007-12-17 2009-06-25 Continental Aktiengesellschaft Method for controlling a motor vehicle chassis
US8403115B2 (en) 2008-01-11 2013-03-26 Penske Racing Shocks Dual rate gas spring shock absorber
DE102011107970B4 (en) 2011-07-20 2015-05-21 Vibracoustic Cv Air Springs Gmbh Sensor for detecting the level position of a supported by an air spring structure, in particular a motor vehicle
DE202012103305U1 (en) * 2012-08-30 2012-09-12 Contitech Luftfedersysteme Gmbh Air suspension system for a rail vehicle
DE102013100295B4 (en) * 2013-01-11 2023-03-30 Miro Gudzulic Air suspension system for a vehicle
US9527358B2 (en) * 2014-05-09 2016-12-27 Firestone Industrial Products Company, Llc Gas spring end members as well as gas spring assemblies including same
US10508703B2 (en) * 2015-01-12 2019-12-17 Firestone Industrial Products Company, Llc Lateral support elements, gas spring assemblies, suspension systems and methods
CN106369098B (en) * 2016-10-08 2018-09-25 西南交通大学 A kind of novel air spring of two stage stiffness automatic adjusument
US10900538B2 (en) 2018-10-29 2021-01-26 Continental Automotive Systems, Inc. Pressure relief for air springs
CN113623348B (en) * 2021-08-20 2022-08-26 西南交通大学 Air spring and railway vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1243388A (en) * 1958-12-29 1960-10-07 Ganz Vagon Es Gepgyar Device for adjusting the level of a vehicle with air mattress suspension
DE1275882B (en) * 1961-03-18 1968-08-22 Daimler Benz Ag Air suspension for vehicles, in particular for motor vehicles
DE1144127B (en) * 1961-12-09 1963-02-21 Daimler Benz Ag Air suspension for vehicles
BE635155A (en) * 1962-07-20
FR1369405A (en) * 1963-05-27 1964-08-14 Advanced air suspension for vehicles
US4386791A (en) * 1981-07-06 1983-06-07 Ford Motor Company Actively controlled suspension system and height sensor
JPS6099107U (en) * 1983-12-14 1985-07-06 トヨタ自動車株式会社 air spring suspension
IT1178992B (en) * 1984-06-27 1987-09-16 Fiat Auto Spa VARIABLE STRENGTH PNEUMATIC SPRING PARTICULARLY FOR VEHICLE SUSPENSIONS

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10132379B2 (en) 2002-06-25 2018-11-20 Fox Factory, Inc. Gas spring with travel control
US9802670B2 (en) 2002-06-25 2017-10-31 Fox Factory, Inc. Gas spring curve control in an adjustable volume gas pressurized device
US10941828B2 (en) 2002-06-25 2021-03-09 Fox Factory, Inc. Gas spring with travel control
US10421518B2 (en) 2002-06-25 2019-09-24 Fox Factory, Inc. Gas spring curve control in an adjustable volume gas pressurized device
US10202166B2 (en) 2002-06-25 2019-02-12 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US8752681B2 (en) 2002-06-25 2014-06-17 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US7703585B2 (en) 2002-06-25 2010-04-27 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US9796447B2 (en) 2002-06-25 2017-10-24 Fox Factory, Inc. Gas spring curve control in an adjustable volume gas pressurized device
US9567029B2 (en) 2002-06-25 2017-02-14 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US9415653B2 (en) 2002-06-25 2016-08-16 Fox Factory, Inc. Gas spring with travel control
US7641028B2 (en) 2002-06-25 2010-01-05 Fox Factory, Inc. Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring
US10018239B2 (en) 2002-09-05 2018-07-10 Fox Factory, Inc. Travel control for a gas spring and gas spring having very short travel modes
US8464850B2 (en) 2006-11-16 2013-06-18 Fox Factory, Inc. Gas spring curve control in an adjustable-volume gas-pressurized device
US9182002B2 (en) 2007-01-31 2015-11-10 Fox Factory, Inc. Travel control for a gas spring and gas spring having very short travel modes
US8608141B2 (en) 2007-01-31 2013-12-17 Fox Factory, Inc. Travel control for a gas spring and gas spring having very short travel modes
US7963509B2 (en) 2007-01-31 2011-06-21 Fox Factory, Inc. Travel control for a gas spring and gas spring having very short travel modes

Also Published As

Publication number Publication date
FR2663100A1 (en) 1991-12-13
FR2663100B1 (en) 1993-02-19
DE4018712A1 (en) 1991-12-19
ITMI911541A1 (en) 1992-12-05
ITMI911541A0 (en) 1991-06-05

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960514