US3620542A - Level control assemblage for vehicles - Google Patents

Level control assemblage for vehicles Download PDF

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Publication number
US3620542A
US3620542A US817045A US3620542DA US3620542A US 3620542 A US3620542 A US 3620542A US 817045 A US817045 A US 817045A US 3620542D A US3620542D A US 3620542DA US 3620542 A US3620542 A US 3620542A
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United States
Prior art keywords
piston
level control
pressure
vehicles
vehicle
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Expired - Lifetime
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US817045A
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English (en)
Inventor
Reiner Hovorka
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Langen and Co
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Langen and Co
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Publication date
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Publication of US3620542A publication Critical patent/US3620542A/en
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    • 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
    • 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
    • B60G17/033—Spring characteristics, e.g. mechanical springs and mechanical adjusting means characterised by regulating means acting on more than one spring

Definitions

  • the pressure spaces of the setting cylinders are connected, dependent upon the distance between the vehicle body and the wheel-supporting means, via one or more level control valves to which the distances are, via linkages communicated, either with a pressure source or with a tank conduit, with the length of the linkages being continuously variable by means of pistoncylinder units installed in the linkages.
  • the prior device employs a single-acting cylinder provided with a return spring which can be loaded with gas or a liquid by means of a rotary slide valve and thus increase the length of linkage. On the other hand, it is possible to lessen the length of the linkage by discharging gas or liquid.
  • a double-acting cylinder equipped with a single piston rod is displaced via a transmitter cylinder having equal effective faces.
  • a blocking occurs with a substantially incompressible liquid due to the known differential effect unless storage components are installed. It should be pointed out that even with a hydrostatic linkage operating satisfactorily under traction and compression, certain disadvantages occur and in particular it is difficult to compensate for volume variations caused by leakages or variations in temperature.
  • the present invention solves the problem by providing a piston-cylinder unit which is a single-acting cylinder having a single piston rod and return spring, with the piston being loaded hydraulically counter to the force of the return spring and the pressure in the liquid being maintained substantially constant by means of an adjustable pressure control valve provided with an outflow aperture.
  • the piston-cylinder units of each vehicle side may be loaded jointly and it is also possible to adjust the height of the front and rear sections of the vehicle separately and for trimming the vehicle in the unloaded state, the initial tension of the return spring and the basic length of the linkage should be variable.
  • FIG. 1 is a diagrammatic view illustrating the essential components ofthe invention
  • FIG. 2 is a view generally similar to FIG. 1 illustrating the manner in which the piston-cylinders of one vehicle side are loaded jointly,
  • FIG. 3 is a view along the lines of FIG. 1 illustrating the means whereby the heights of the front and rear sections of the vehicle can be set separately, and
  • a vehicle (not illustrated in detail) is provided with a rear axle 1 on which are suitably supported rear wheels 2 and 3. Front wheels 4 and 5 are operably associated with wheel steering and suspension arrangements 6 and 7.
  • rear axle 1 braces itself against the vehicle body (not shown), by means of setting or regulating cylinders 8 and 9 respectively and the steering and suspension arrangements 6 and 7 brace themselves against the vehicle body via setting or regulating cylinders 14 or 15.
  • ports T, T and T" are connected to lines 25, 26 and 27 communicating with tanks 25a and 25b.
  • the connections P, P and P" are supplied via a pressure line or conduit 28 from a common source of pressure denoted generally 29.
  • a pressure limiting valve 30 is provided for serving as protection against overloads.
  • FIG. 2 components which correspond to those illustrated in FIG. I bear the same reference legends and it will be seen that two pressure regulator valves 136" and 136" are provided.
  • the regulator valve 136' via transmission line effects the piston-cylinder units 32' and 132' at the left side of the vehicle while the regulator valve 136" via transmission line I35" effects the piston-cylinder units 32" and 132 at the right side of the vehicle.
  • pressure regulator valves 236 and 236" are included and the valve 236' by way of a transmission line 235 effects the two piston-cylinder units 232' and 232" arranged at the rear axle I.
  • the regulator valve 236" effects the piston-cylinder units 32' and 32" for the front wheels 4 and 5 via transmission line 235". This arrangement permits the heights of the front and rear sections of the vehicle to be set separately.
  • a certain setting at the pressure control valve 36 means a reduction of the pressure in the pressure line 28 which is dependent upon the setting of the pressure limiting valve 30 or the load applied to the setting cylinders respectively to a lower pressure in the system denoted B, and line 35.
  • This pressure acts upon the pistons 34, 34 and 34" of the units 32, 32 and 32" and an equilibrium position establishes itself between the forces of the return springs 33, 33' and 33" and the hydraulic pressure force on the pistons 34, 34' and 34".
  • the pressure is increased, the springs 33, 33 and 33" are compressed more and the length of the units 32, 32' and 32 and as a consequence the length of the linkage 31, 31 and 31" increases.
  • the result thereof is a greater ground clearance of the vehicle while on the other hand such ground clearance is reduced at lower pressure since then the lengths of the linkages 31, 31' and 31" are shortened.
  • the stroke of the piston cylinder units 32, 32' and 32" may be so limited that there still remains spring movement for the cylinders 8, 9, l4 and 15 even in the end positions. Moreover, the stroke may be so great that elastic movement is no longer possible due to the fact the setting cylinders run against their abutment.
  • the level control assemblage for vehicles as claimed in claim 1 including means whereby the heights of the front and rear sections of the vehicle can be set separately.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
US817045A 1968-05-15 1969-04-17 Level control assemblage for vehicles Expired - Lifetime US3620542A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681755480 DE1755480A1 (de) 1968-05-15 1968-05-15 Niveauregeleinrichtung fuer Fahrzeuge

Publications (1)

Publication Number Publication Date
US3620542A true US3620542A (en) 1971-11-16

Family

ID=5693501

Family Applications (1)

Application Number Title Priority Date Filing Date
US817045A Expired - Lifetime US3620542A (en) 1968-05-15 1969-04-17 Level control assemblage for vehicles

Country Status (4)

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US (1) US3620542A (enrdf_load_stackoverflow)
DE (1) DE1755480A1 (enrdf_load_stackoverflow)
FR (1) FR2008557A1 (enrdf_load_stackoverflow)
GB (1) GB1266960A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747949A (en) * 1970-03-20 1973-07-24 Bosch Gmbh Robert Apparatus for maintaining the pressure in a pneumatic suspension
JPS48104217A (enrdf_load_stackoverflow) * 1972-03-08 1973-12-27
US3963261A (en) * 1974-03-04 1976-06-15 Nissan Motor Co., Ltd. Vehicle suspension system
US4278272A (en) * 1978-10-05 1981-07-14 Boge Gmbh Hydropneumatic spring suspension device for vehicles
US4470615A (en) * 1981-05-30 1984-09-11 Willy Scheuerle Fahrzeugfabrik Gmbh & Co. Fluid-operated supporting arrangement and a conduit breakage safety device
US4703895A (en) * 1984-03-20 1987-11-03 Vernon Harvey B W Ground-engaging travelling structure
WO2011157094A1 (zh) * 2010-06-13 2011-12-22 长沙中联重工科技发展股份有限公司 车身倾角调整单元、油气悬架机构以及流动式起重机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2745416B2 (ja) * 1989-01-19 1998-04-28 富士重工業株式会社 車高調整装置付車両の車高制御方法
FR3153203A1 (fr) 2023-09-14 2025-03-21 Joel Gilbert Adaptateur Off-Grid pour routeur solaire photovoltaïque On-Grid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978254A (en) * 1958-09-09 1961-04-04 Gen Motors Corp Interconnected fluid suspension system
DE1124833B (de) * 1957-03-09 1962-03-01 Maschf Augsburg Nuernberg Ag Gasfederung fuer Fahrzeuge, insbesondere Kraftfahrzeuge
US3071394A (en) * 1960-10-21 1963-01-01 Weatherhead Co Control valve for vehicle suspension
US3074739A (en) * 1959-08-03 1963-01-22 Magneti Marelli Spa System and pneumatic device for varying the chassis level of vehicles equipped with compressed air suspensions
US3209784A (en) * 1963-04-25 1965-10-05 Wagner Electric Corp Height control valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124833B (de) * 1957-03-09 1962-03-01 Maschf Augsburg Nuernberg Ag Gasfederung fuer Fahrzeuge, insbesondere Kraftfahrzeuge
US2978254A (en) * 1958-09-09 1961-04-04 Gen Motors Corp Interconnected fluid suspension system
US3074739A (en) * 1959-08-03 1963-01-22 Magneti Marelli Spa System and pneumatic device for varying the chassis level of vehicles equipped with compressed air suspensions
US3071394A (en) * 1960-10-21 1963-01-01 Weatherhead Co Control valve for vehicle suspension
US3209784A (en) * 1963-04-25 1965-10-05 Wagner Electric Corp Height control valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747949A (en) * 1970-03-20 1973-07-24 Bosch Gmbh Robert Apparatus for maintaining the pressure in a pneumatic suspension
JPS48104217A (enrdf_load_stackoverflow) * 1972-03-08 1973-12-27
US3963261A (en) * 1974-03-04 1976-06-15 Nissan Motor Co., Ltd. Vehicle suspension system
US4278272A (en) * 1978-10-05 1981-07-14 Boge Gmbh Hydropneumatic spring suspension device for vehicles
US4470615A (en) * 1981-05-30 1984-09-11 Willy Scheuerle Fahrzeugfabrik Gmbh & Co. Fluid-operated supporting arrangement and a conduit breakage safety device
US4703895A (en) * 1984-03-20 1987-11-03 Vernon Harvey B W Ground-engaging travelling structure
WO2011157094A1 (zh) * 2010-06-13 2011-12-22 长沙中联重工科技发展股份有限公司 车身倾角调整单元、油气悬架机构以及流动式起重机

Also Published As

Publication number Publication date
DE1755480A1 (de) 1971-12-02
FR2008557A1 (enrdf_load_stackoverflow) 1970-01-23
GB1266960A (enrdf_load_stackoverflow) 1972-03-15

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