+

WO1992005970A1 - Dispositifs sur un vehicle a bogie servant a repartir le poids entre l'essieu d'entrainement et l'essieu d'appoint - Google Patents

Dispositifs sur un vehicle a bogie servant a repartir le poids entre l'essieu d'entrainement et l'essieu d'appoint Download PDF

Info

Publication number
WO1992005970A1
WO1992005970A1 PCT/SE1991/000604 SE9100604W WO9205970A1 WO 1992005970 A1 WO1992005970 A1 WO 1992005970A1 SE 9100604 W SE9100604 W SE 9100604W WO 9205970 A1 WO9205970 A1 WO 9205970A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
axle
pneumatic spring
driven
air
Prior art date
Application number
PCT/SE1991/000604
Other languages
English (en)
Inventor
Lars Jung
Original Assignee
Saab-Scania Aktiebolag
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 Saab-Scania Aktiebolag filed Critical Saab-Scania Aktiebolag
Priority to DE4192425A priority Critical patent/DE4192425C2/de
Priority to DE4192425T priority patent/DE4192425T1/de
Publication of WO1992005970A1 publication Critical patent/WO1992005970A1/fr
Priority to GB9210271A priority patent/GB2254057B/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
    • B60G17/0523—Regulating distributors or valves for pneumatic springs
    • B60G17/0528—Pressure regulating or air filling valves
    • 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
    • B60G5/00—Resilient suspensions for a set of tandem wheels or axles having interrelated movements
    • B60G5/04—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid
    • B60G5/047—Resilient suspensions for a set of tandem wheels or axles having interrelated movements with two or more pivoted arms, the movements of which are resiliently interrelated, e.g. the arms being rigid at least one arm being resilient, e.g. a leafspring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D61/00—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern
    • B62D61/12—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels
    • 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
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/02—Trucks; Load vehicles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2600/00—Indexing codes relating to particular elements, systems or processes used on suspension systems or suspension control systems
    • B60G2600/20—Manual control or setting means

Definitions

  • the present invention relates to an arrangement for a vehicle bogie to distribute weight between a driven and a non-driven axle, which bogie includes at least one first pneumatic spring device mounted between the frame of the vehicle and the driven axle and at least one second pneumatic spring device mounted between the frame and the non-driven axle, which pneumatic spring devices are interconnected as well connected to a pressure source via pressure-conducting piping
  • a rear suspension formed as a tag axle bogie, comprising a driven axle and a tag axle. Having dual rear axles, such a vehicle can be subjected to greater loads than a vehicle with only one rear axle. On some vehicle types, e.g. with a short axle distance, bouncing is difficult to avoid during driving if conventional leaf springs are used in the tag axle bogie. Air suspension is therefore often employed on these vehicle types, since this suspension has properties that counteract bouncing and provide a better ride for driver and cargo.
  • the air suspension includes two spring units per axle. Each spring unit comprises a spring bracket attached to the frame, from which one end of a leaf spring assembly is pivoted. The other end of the spring assembly carries one end of an air spring, whose other end is fixed to the frame.
  • the weight distribution between the axles is limited by legislation that stipulates the maximum weight permitted on the drive axle, tag axle and the whole of the bogie.
  • regulations differ between countries
  • the permissible drive axle weight therefore varies between 10 and 13 tonnes and that on the tag axle between 6 and 8 tonnes
  • the permissible bogie weight varies between 16 and 21 tonnes, depending on legislatory regulations in individual countries.
  • the present invention serves the purpose of eliminating the above- mentioned drawbacks.
  • the invention is characterized in that a pressure-limiting device is installed in a pressure-conducting pipe be ⁇ tween the pressure source and the second pneumatic spring device, which pressure-limiting device is designed to close the pressure-conducting pipe when a predetermined pressure's reached in the pneumatic spring device, but which opens the pressure-conducting pipe when the predetermined pressure is undercut, and in which the pressure source, when the pressure exceeds the predetermined value, only has pressure-conducting connection with the first pneumatic spring device.
  • the invention in a simple and advantageous way solves the problems hitherto associated with the distribution of weight between the drive axle and tag axle in a tag axle bogie.
  • the invention provides, for any load condition, automatic weight distribution between the axles by employing a compressed-air system already present on the vehicle.
  • the invention incorporates a control device in the pressure-limiting device, which enables the predetermined pressure to be varied.
  • a control device in the pressure-limiting device, which enables the predetermined pressure to be varied.
  • This allows the weight distribution to be easily adjusted for different markets, which in turn means that identical air spring and leaf spring assemblies can be used to provide vehicles with different distributions of drive axle and tag axle weights.
  • the manufacture of vehicles optimally adapted for different markets is therefore enabled using identical components, whilst costs can be kept down.
  • Figure 1 shows a side view of the rear section of a truck chassis
  • Figure 2 shows a schematic compressed-air diagram of an air suspension system
  • Figure 3 shows a pressure-limiting device intended for installation in an air suspension system.
  • Figure 1 shows the rear section of a truck chassis.
  • the chassis comprises a frame 1, consisting of twin parallel longitudinal members 2 connected to each other via a number of crossmembers (not shown).
  • the figure shows a side view of the chassis, therefore only one of the side members 2 is visible.
  • an air spring assembly 7 is installed at each frame side member 2.
  • the figure only shows the air spring assembly 7 of the drive axle 3 and tag axle 4 at the side member 2 on one side, it is understood that the spring assemblies 7 at the other side member are identical to the ones described.
  • Each spring assembly 7 comprises a bracket 8 attached to the side member 2. From the lower end of this bracket, one end of a leaf spring assembly 9 is pivoted by means of a bushing 10. The other end of the leaf spring assembly 9 carries one end of a pneumatic spring device 11 , the other end of which is attached to the frame 1.
  • this pneumatic spring device 11 is referred to as an air spring.
  • each axle 3, 5 is attached to the leaf spring assembly 9 using spring clamps 12.
  • shock absorbers are installed to dampen oscillations of the frame 1 relative to the axles 3, 5.
  • the shock absorbers are not represented in the figures.
  • the air springs 11 are filled with pressure medium, i.e. compressed air, via a compressed-air system 13, which is partly shown in figure 1 and, although schematically, in greater detail in figure 2.
  • the compressed-air system 13 includes a pressure source 14, principally in the form of an accumulating tank, which is supplied with compressed air from a com ⁇ pressor 15 driven off the power unit of the vehicle, the latter not shown in the figure.
  • the pressure source 14 is connected to a level valve 17 via a pressure pipe 16.
  • the level valve 17 is attached to the frame 1 and connected to the drive axle 3 via an arm 18.
  • the arm 18 pivots upwards and downwards, thus transmitting the movements up and down of the frame 1 relative to the drive axle 3 to the level valve 17.
  • the level valve 17 is arranged to admit pressure via air pipes 19-21 to the air springs 1 1 in order to maintain the frame 1 at constant height relative to the drive axle 3, irrespective of load.
  • Three pressure-conducting pipes 20, 21, 22 are branched off pipe 19. Two of the pipes 20, 21 are each connected to one of the air springs 11 on the drive axle 3, whereas the third pipe 22 is branched into a pipe 23 connected to one air spring 11 on the tag axle 5 and one pipe 24 to the other air spring 11 on the tag axle 5.
  • a pressure-limiting device 25 in the form of a pressure reduction valve is installed in pipe 22. From figure 3 it can be seen that the valve 25 com- prises a housing 26 designed to incorporate an inlet port 27 and an outlet port 28.
  • the inlet port 27 communicates with the air springs 1 1 at the driven axle 3 via pipe section 22' (fig.2), while the outlet port 28 communicates with the air springs 11 at the non-driven axle 5 via pipe section 22" (fig. 2).
  • Valve 25 furthermore includes a valve element 29 arranged to slide in the valve housing 26, and which is pushed off a valve seat 30 by a spring 31.
  • the tension of spring 31 is adjustable by means of a control device 32.
  • control device 32 Via a duct 34 the inlet port 27 is also connected to a cavity above a piston 33 integrated in the lower section of the valve element 29, the underside of piston 33 being subjected to atmospheric pressure and pressure from spring 31.
  • the piston 33 is designed to slide in a cylinder bore in the housing 26, across a seal 35.
  • the control device 32 which is set to a pressure in the pressure-conducting pipe 22 corresponding to the desired weight distribution, maintains the valve element 29 in an open position until the preset pressure is exceeded. In the following typical execution, control device 32 is set to close the pressure-conducting pipe 22 when a pressure of 5 bar is reached in pipe 22, which may correspond to a maximum weight of around 6.5 tonnes on the tag axle 5. It is an advantage if the control device 32 is adjustable for closing pressures of between 3 and 8 bar.
  • the invention has the following function.
  • the function description is related to a tag axle bogie of a specific geometrical design.
  • For a tag axle bogie of another geometrical design other pressures than those mentioned in the description naturally apply.
  • the principle incorporated in the invention can be applied to all bogies, independently of their geometrical design.
  • - level valve 17 will instead admit a pressure of 6 bar on the vehicle exemplified above.
  • the pressure is supplied to the air springs 11 of the drive axle 3 and the inlet port 27 of the pressure-limiting device 25, past valve element 29, which during the initial phase of the pressurizing stage is maintained open by spring 30, and on through outlet port 28 to the air springs 11 of the tag axle 5.
  • pressure builds up in the air springs 11 of the drive axle 3 and tag axle 5 and ultimately exceeds the pressure of 5 bar preset with spring 31, the pressure induced on the top surface of piston 33 via duct 34 will overcome the force of spring 30.
  • Piston 33 is then pushed down together with valve element 29, closing valve seat 30 and preventing further build-up of pressure in the air springs 11 of the tag axle 5.
  • the pressure in the air springs 11 of the drive axle 3 continues to increase, however, until a pressure corresponding to the load has been reached.
  • the bogie weight of 18 tonnes is thereby distributed with 12 tonnes on the drive axle 3 and only 6 tonnes on the tag axle 5.
  • the position of the frame 1 relative to the drive axle 3 is altered.
  • the arm 18 of the level valve 17 senses the new position and vents the air springs 11 of the drive axle 3 to a pressure corresponding to the new load, i.e. the weight of the rear section of the vehicle.
  • the pressure in the air springs 11 of the drive axle 3 has dropped to a level below the closing pressure of pressure-limiting device 25, the pressure-conducting pipe 22 is opened, thus also allowing the air springs 11 of the tag axle 5 to be vented via level valve 17.
  • control device 32 By setting the control device 32 on the pressure- limiting device 25 to provide different spring forces, weight distribution can be varied between the axles 3 and 5. Depending on the setting of control device 32, distribution in the example with a bogie weight of 18 tonnes can be adjusted to 11 tonnes on the drive axle 3 and 7 tonnes on the tag axle 5, or 13 tonnes on the drive axle 3 and 5 tonnes on the tag axle 5, etc.
  • the tag axle bogie can be differently designed, e.g. using other spring designs and a tag axle that can be lifted and lowered automatically or manually, etc., without affecting the principle of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vehicle Body Suspensions (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Pour répartir le poids entre un essieu d'entraînement (3) et un essieu d'appoint (5) dans un bogie à essieu d'appoint, un tuyau conducteur de pression (22) est installé entre les dispositifs de ressorts pneumatiques (11) et les deux essieux (3, 5). Dans le tuyau (22), un limiteur de pression (25) a pour fonction de fermer le tuyau (22) quand une pression prédéterminée est atteinte dans les dispositifs de ressorts pneumatiques (11) de l'essieu d'entraînement (3), et d'ouvrir le tuyau (22) quand la pression prédéterminée n'est plus atteinte. Quand le tuyau (22) est fermé, une accumulation de pression continue est possible dans les dispositifs de ressorts pneumatiques (11) de l'essieu d'entraînement (3), mais pas dans les dispositifs de ressorts pneumatiques (11) de l'essieu d'appoint (5). On peut modifier la répartition du poids entre les deux essieux (3, 5) en changeant la pression prédéterminée.
PCT/SE1991/000604 1990-09-27 1991-09-12 Dispositifs sur un vehicle a bogie servant a repartir le poids entre l'essieu d'entrainement et l'essieu d'appoint WO1992005970A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4192425A DE4192425C2 (de) 1990-09-27 1991-09-12 Vorrichtung für ein Fahrzeugfahrgestell zur Gewichtsverteilung zwischen einer getriebenen und einer nicht getriebenen Achse
DE4192425T DE4192425T1 (de) 1990-09-27 1991-09-12 Vorrichtung für ein Fahrzeugfahrgestell zur Gewichtsverteilung zwischen einer getriebenen und einer nicht getriebenen Achse
GB9210271A GB2254057B (en) 1990-09-27 1992-05-13 Arrangement on a vehicle bogie to distribute weight between a driven and non-driven axle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9003068A SE467200B (sv) 1990-09-27 1990-09-27 Arrangemang foer att vid en fordonsboggi foerdela belastning mellan en drivande och en ej drivande axel
SE9003068-5 1990-09-27

Publications (1)

Publication Number Publication Date
WO1992005970A1 true WO1992005970A1 (fr) 1992-04-16

Family

ID=20380463

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000604 WO1992005970A1 (fr) 1990-09-27 1991-09-12 Dispositifs sur un vehicle a bogie servant a repartir le poids entre l'essieu d'entrainement et l'essieu d'appoint

Country Status (4)

Country Link
DE (2) DE4192425T1 (fr)
GB (1) GB2254057B (fr)
SE (1) SE467200B (fr)
WO (1) WO1992005970A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695657A1 (fr) 1992-06-23 1996-02-07 Rover Group Limited Système de suspension pour véhicule
US6845989B2 (en) * 2001-12-19 2005-01-25 The Boler Company Lift axle air pressure transfer control apparatus
WO2010120235A1 (fr) * 2009-04-17 2010-10-21 Scania Cv Ab Véhicule à moteur avec système de suspension à air et programme informatique pour commander un système de suspension à air
US9872428B2 (en) 2014-05-22 2018-01-23 Cnh Industrial America Llc Agricultural implement with a weight distribution system
US11345208B2 (en) * 2019-03-06 2022-05-31 Goldhofer Ag Axle assembly for a heavy-duty vehicle and heavy duty-vehicle having at least one such axle assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9803782D0 (sv) * 1998-11-05 1998-11-05 Volvo Lastvagnar Ab Anordning vid hjulupphängning i ett lastfordon
GB2356607B (en) * 1999-11-29 2002-01-23 Sdc Trailers Ltd Semi-trailer assembly
SG101963A1 (en) * 2001-03-14 2004-02-27 Ordnance Dev And Engineering C Mobile artillery system
GB2387359A (en) * 2002-03-27 2003-10-15 Wheelbase Engineering Ltd Control system for lift axles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301225A1 (fr) * 1987-07-25 1989-02-01 Robert Bosch Gmbh Procédé de régulation d'une suspension pneumatique de véhicule

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301225A1 (fr) * 1987-07-25 1989-02-01 Robert Bosch Gmbh Procédé de régulation d'une suspension pneumatique de véhicule

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0695657A1 (fr) 1992-06-23 1996-02-07 Rover Group Limited Système de suspension pour véhicule
US6845989B2 (en) * 2001-12-19 2005-01-25 The Boler Company Lift axle air pressure transfer control apparatus
WO2010120235A1 (fr) * 2009-04-17 2010-10-21 Scania Cv Ab Véhicule à moteur avec système de suspension à air et programme informatique pour commander un système de suspension à air
US9872428B2 (en) 2014-05-22 2018-01-23 Cnh Industrial America Llc Agricultural implement with a weight distribution system
US11345208B2 (en) * 2019-03-06 2022-05-31 Goldhofer Ag Axle assembly for a heavy-duty vehicle and heavy duty-vehicle having at least one such axle assembly

Also Published As

Publication number Publication date
SE467200B (sv) 1992-06-15
DE4192425T1 (de) 1997-07-24
DE4192425C2 (de) 2002-07-04
GB2254057B (en) 1994-07-27
SE9003068D0 (sv) 1990-09-27
GB9210271D0 (en) 1992-07-22
SE9003068L (sv) 1992-03-28
GB2254057A (en) 1992-09-30

Similar Documents

Publication Publication Date Title
US7938416B2 (en) Air suspension adapter kit
US8047551B2 (en) Multi-stage height control valve including position sensitive pilot signal and pressure boost for vehicle air springs
EP1456044B1 (fr) Systeme de commande a ressort pneumatique pour essieu relevable de vehicule
AU701489B2 (en) Bellows, as well as air suspension system and axle lift system
MXPA06001940A (es) Sistema de suspension de aire con valvula de cierre de aire.
US20090289426A1 (en) Air storage system for an air suspension system in a heavy vehicle
WO1992005970A1 (fr) Dispositifs sur un vehicle a bogie servant a repartir le poids entre l'essieu d'entrainement et l'essieu d'appoint
US8870203B2 (en) Vehicle leaf spring to air ride suspension conversion assembly
WO1990013468A1 (fr) Systeme de suspension pneumatique avec essieu soulevable a charge controlable
US7942432B2 (en) Leveling system for a vehicle air suspension
CN106004313A (zh) 一种半挂车用中部提升的空气悬挂系统
US6062579A (en) Retrofittable suspension system for the rear axle of a vehicle
US20190337349A1 (en) Pneumatic control system for vehicles and other loaded structures
EP0633849B1 (fr) Perfectionnements concernant des suspensions auxiliaires
CA2188178C (fr) Suspension a bras longitudinal pourvue d'un bras levier
CA2630294C (fr) Trousse d'adaptateur de suspension pneumatique
KR100471821B1 (ko) 트럭의 리어 서스펜션 헬퍼스프링 장치
CA2338148C (fr) Suspension de vehicule a ballons d'air relies
EP0517546A1 (fr) Amélioration concernant les suspensions de véhicules
JP3218577B2 (ja) 後二軸車のリア・サスペンションに使用される軸重分配装置
CA2690362A1 (fr) Trousse de conversion d'une suspension du type ressorts a lame a une suspension pneumatique
EP0111944A1 (fr) Système de suspension de roue pour un véhicule, dans lequel la rigidité du ressort est dépendante de la charge
EP0472309B1 (fr) Suspensions pneumatiques pour véhicules
CN116811508A (zh) 一种电控空气悬架控制系统、车身底盘及其整车
IE73659B1 (en) Improvements in and relating to auxiliary suspension systems

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DE GB

RET De translation (de og part 6b)

Ref document number: 4192425

Country of ref document: DE

Date of ref document: 19970724

WWE Wipo information: entry into national phase

Ref document number: 4192425

Country of ref document: DE

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载