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GB2467978A - Monitoring and controlling air suspension of movable load carrying member mounted on a vehicle - Google Patents

Monitoring and controlling air suspension of movable load carrying member mounted on a vehicle Download PDF

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Publication number
GB2467978A
GB2467978A GB0903114A GB0903114A GB2467978A GB 2467978 A GB2467978 A GB 2467978A GB 0903114 A GB0903114 A GB 0903114A GB 0903114 A GB0903114 A GB 0903114A GB 2467978 A GB2467978 A GB 2467978A
Authority
GB
United Kingdom
Prior art keywords
pressure
vehicle
control means
air suspension
operating parameters
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.)
Granted
Application number
GB0903114A
Other versions
GB0903114D0 (en
GB2467978B (en
Inventor
Matthew Fry
Stephen Pahl
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Knorr Bremse Systeme fuer Schienenfahrzeuge 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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH, Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority to GB0903114.7A priority Critical patent/GB2467978B/en
Publication of GB0903114D0 publication Critical patent/GB0903114D0/en
Publication of GB2467978A publication Critical patent/GB2467978A/en
Application granted granted Critical
Publication of GB2467978B publication Critical patent/GB2467978B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B60G17/015—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
    • B60G17/0152—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 action on a particular type of suspension unit
    • B60G17/0155—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 action on a particular type of suspension unit pneumatic unit
    • 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
    • B60G17/0416—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions
    • B60G17/0424—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions by varying the air pressure of the accumulator
    • 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
    • B60G17/02—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
    • 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
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/04—Trailers
    • B60G2300/042—Semi-trailers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2300/00—Indexing codes relating to the type of vehicle
    • B60G2300/09—Construction vehicles, e.g. graders, excavators
    • 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
    • B60G2400/20—Speed
    • B60G2400/208—Speed of wheel rotation
    • 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
    • B60G2400/50—Pressure
    • B60G2400/51—Pressure in suspension unit
    • 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
    • B60G2400/50—Pressure
    • B60G2400/51—Pressure in suspension unit
    • B60G2400/512—Pressure in suspension unit in spring
    • B60G2400/5122—Fluid spring
    • B60G2400/51222—Pneumatic
    • 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
    • B60G2400/60—Load
    • 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
    • B60G2400/90—Other conditions or factors
    • B60G2400/95—Position of vehicle body elements
    • 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
    • B60G2500/201—Air spring system type
    • 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
    • B60G2500/202—Height or leveling valve for air-springs
    • B60G2500/2021—Arrangement of valves
    • 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
    • B60G2500/203—Distributor valve units comprising several elements, e.g. valves, pump or accumulators
    • 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
    • B60G2500/204—Pressure regulating valves for air-springs
    • B60G2500/2044—Air exhausting valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/30—Height or ground clearance
    • B60G2500/302—Height or ground clearance using distributor valves
    • 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
    • B60G2600/02—Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption
    • 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
    • B60G2600/07—Inhibiting means
    • 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
    • B60G2600/18—Automatic control means
    • 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
    • B60G2600/85—Speed of regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/20—Stationary vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/91—Suspension Control
    • B60G2800/912—Attitude Control; levelling control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/91—Suspension Control
    • B60G2800/914—Height Control System
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/92—ABS - Brake Control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

Apparatus for controlling an air suspension system, the apparatus comprising a load sensor adapted to measure pressure in the air suspension system, and pressure control means adapted to control the pressure in the air suspension system when the change in pressure is greater than a predetermined limit, for example 20%. The control means may receive inputs from a wheel speed sensor and operating parameters may only be adjusted if vehicle speed is less than 15 km/h. The apparatus may be part of a trailer electronic braking system, or may return a tipping vehicle to its bump stops.

Description

I
Apparatus for monitonng the status of a movable toad carrying member mounted on a vehicle The present invention relates to apparatus and a method for monitoring the status of a movable load carrying member mounted on a vehicle. The term vehicle includes, by way of example, self-propelled vehicles such as trucks, refuse disposal vehicles and earthmoving vehicles as well as trailers and semitrailers which are adapted to be pulled by trucks or the like.
In one preferred form of the present invention the apparatus is applied to what is known as a tipper truck typically used for transporting loose aggregate such as sand and gravel which is carried in an open, load carrying member mounted on the vehicle so as to pivot about a transverse axis located adjacent the rear of the load carrying member to discharge the load behind the vehicle. ft is also known for such tipping containers to include roller-conveyors to enable pellets or similar boxlike products to be discharged on to a conveyor system at a warehouse, for example.
It is also known to have load carrying members mounted so as to pivot about an axis parallel to the longitudinal axis of the vehicle to discharge the load to one side of the vehide. Refuse vehicles typically have such a discharge system.
When the vehicle discharges its load, the sudden changes in the distribution of the weight on the vehicle or trailer can cause damage to the air suspension of the vehicle or trailer. Whilst it would be possible to interlock the air suspension dump valves with the vehicle park brake for example, in many cases the discharging vehicle will need to move during discharge of the load.
The present invention therefore seeks to provide apparatus for detecting the raising of a load carrying member.
According to the invention there is provided apparatus for controlling operating parameters of vehicle having a load carrying member movably mounted, which vehicle has an air suspension system, the apparatus comprising a load sensor adapted to measure pressure in the air suspension system and pressure control means adapted to control the pressure in the air suspension system and monitor the load sensor output, wherein, in use, the load sensor is adapted to measure changes in pressure resulting from movement of the load carrying member and in the event that the change in pressure is greater than a predetermined limit, the pressure control means is adapted to adjust operating parameters of the vehicle.
Preferably, the pressure control means further receives an input from a wheel speed sensor, the pressure control means only adjusting operating parameters of the vehicle if the input from the wheel speed sensor indicates that the vehicle is moving at less than a predetermined speed. Preferably, the operating parameters are only adjusted if the pressure sensor output changes by at least 20%. Preferably, the operating parameters are only adjusted if the vehicle speed is less than 15 km/h.
Exemplary embodiments of the invention will now be described in greater detail with reference to the drawings in which: Fig. I shows a known levelling system Fig. 2 shows a levelling system in accordance with the invention.
Fig. 3 shows a comparative graph Fig. 4 shows a further comparative graph Figure 1 shows a known levelling system for a commercial vehicle having three axles. The suspension system compnses a reservoir 10 pneumatically connected to respective air bags 11-16 associated with each end of each axle. The flow of air from the reservoir 10 to the airbags 11-16 is controlled by a lift axle valve 17 which in use is used to raise or lower the height of axles in dependence on the vehicle load.
The lift axle valve 17 controls two relay valves 18, 19, with one relay valve being assigned to a respective side of the vehicle, so that the air pressure in the airbags is controlled by both relay valves 18,19 on each axle. The suspension system further compnses a levelling valve 20, which is in pneumatic connection with the two relay valves 18,19 and the reservoir 10.
The relay valves 18,19 have using industry standard notation an inlet port 1, outlet port 2, a vent 3 and a control input port 4. When a pressure is maintained at the control input port 4, the levelling valve 20 can control the ride height of the vehicle as there is a direct connection between the inlet and outlet ports I and 2.
Both the lift axle valve 17 and the levelling valve 20 are solenoid valves and the electrical control signal is provided from the vehide cab shown schematically as 21.
To exhaust the airbags 11-16, a switch in the cab has to be applied to activate the lift axle valve 17 to switch to position 3, which will then exhaust the ports 4 of the relay valves. The pressure in the airbags is therefore dumped and the vehicle is lowered to the bump stops to prevent suspension damage caused by any sudden load shifts.
The system of Figure 1 suffers from the drawback that it requires an electrical connection from the vehicle cab to operate and therefore can only realistically be used in lighter tipper trucks and is difficult to adapt for use with a semi-trailer or trailer based tipper.
Figure 2 shows generally a tipper suspension system for a trailer comprising a reservoir 30 pneumatically connected to respective air bags 31-36 associated with each end of each axle. The flow of air from the reservoir 30 to the airbags 31-36 is controlled by levelling valve 40 which in use is used to raise or lower the height of axles in dependence on the vehicle load and the trailer electronic braking system generally indicated as 50. The trailer electronic braking system is pneumatically connected to the control ports 4 of the two relay valves 38, 39, with one relay valve being assigned to a respective side of the vehicle, so that the air pressure in the airbags is controlled by both relay valves 38,39 on each axle.
In a first embodiment of the invention for a rear tip semi trailer, a load sensor is provided to measure the pressure at the rear axle of the tipper. This pressure is generally designated as p42 and this provides a control input to the trailer braking system as indicated in Figure 2. The trailer braking system is further adapted to measure inter a/ia the wheel speeds of the wheels on the trailer in the known fashion.
In the event that the bed of the semi-trailer is raised, the pressure at the rear axle will be increased. If the pressure increase by more than a predetermined limit and the output of the wheel speed sensors indicates that the vehicle is travelling below a predetermined speed, the trailer electronic braking system detects the change and activates pressure p28 to dump the pressure in the airbags 31-36 to return the trailer to the bump stops.
Figure 3 shows a comparative graph of the pressure at the rear axle 42 with respect to time and tipping angle. On the lower part, the pressure over time is shown for the known systems and for the system of the invention. The significantly more rapid change in pressure reduces the likelihood of damage to The suspension system.
In a second embodiment generally applicable to a rear tip full trailer, load sensors are provided at the front and rear of the trailer, measuring pressures p421 and p42r. In this embodiment, when the trailer is raised, the pressure at the front of the trailer will be reduced and that at the rear Will be increased. This difference can be measured by the trailer electronic braking system, which can then dump the pressure in the airbags.
Figure 4 shows a comparative graph of the pressure at the rear axle 42 with respect to time and tipping angle. On the lower part, the pressure over time is shown for the known systems and for the system of the invention. The significantly more rapid change in pressure again reduces the likelihood of damage to the suspension system. This embodiment will generally react more quickly than the first embodiment.
In a third embodiment generally applicable to a side tip semi or full trailer, two or, optionally for a full trailer, three load sensors are provided. In this embodiment, a toad sensor is assigned to each side of the trailer so that the pressure difference changes can be detected when the trailer discharges its load.
In a fourth embodiment for a side tipping vehicle that can only tip to one side, for example, a refuse truck, a single load sensor could be provided at the side of the trailer where the body pivots. In a fifth embodiment for a rigid truck, the load sensor could be installed so as to detect the pressure on the rear axle.
Although in the specific embodiments, the invention has been described as dumping the pressure in the airbags of the suspension system, it would be possible to use an alternative such as switching in a restraint or adjusting another operational parameter.
The operating parameters may include one or more of: adjusting self levelling suspension of the vehicle; lowering the vehicle suspension to a load discharge condition; adjusting the braking force distribution of the vehide brakes; automatically applying the vehicle brakes if greater than a predetermined difference between the load detectors is measured and vehicle speed exceeds a predetermined minimum.

Claims (9)

  1. CLAIMS1. Apparatus for controlling operating parameters of vehicle having a load carrying member movably mounted, which vehicle has an air suspension system, the apparatus compnsing a load sensor adapted to measure pressure in the air suspension system and pressure control means adapted to control the pressure in the air suspension system and monitor the load sensor output, wherein, in use, the load sensor is adapted to measure changes in pressure resulting from movement of the load carrying member and in the event that the change in pressure is greater than a predetermined limit, the pressure control means is adapted to adjust operating parameters of the vehicle.
  2. 2. Apparatus according to Claim 1, wherein the pressure control means further receives an input from a wheel speed sensor, the pressure control means only adjusting operating parameters of the vehicle if the input from the wheel speed sensor indicates that the vehide is moving at less than a predetermined speed.
  3. 3. Apparatus according to Claim 1 or Claim 2, wherein the operating parameters are only adjusted if the pressure sensor output changes by at least 20%.
  4. 4. Apparatus according to any one of Claims I to 3, wherein the operating parameters are only adjusted if the vehicle speed is less than 15 kmlti.
  5. 5. Apparatus according to any one of Claims I to 4, wherein a pressure sensor is provided at the front and rear axles of the vehicles, the output of both pressure sensors being fed to the pressure control means.
  6. 6. Apparatus according to any one of Claims I to 5, wherein the pressure control means is adapted to reduce the pressure in the air suspension system.
  7. 7. Apparatus according to Claim 6, wherein the apparatus returns the vehicle to its bump stops.
  8. 8. Apparatus according to any one of Claims 1 to 7, wherein the pressure control means comprises part of a trailer electronic braking system.
  9. 9. Apparatus for monitoring the status of a load carrying member movably mounted on a vehicle, substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
GB0903114.7A 2009-02-24 2009-02-24 Apparatus for monitoring the status of a movable load carrying member mounted on a vehicle Active GB2467978B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0903114.7A GB2467978B (en) 2009-02-24 2009-02-24 Apparatus for monitoring the status of a movable load carrying member mounted on a vehicle

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Application Number Priority Date Filing Date Title
GB0903114.7A GB2467978B (en) 2009-02-24 2009-02-24 Apparatus for monitoring the status of a movable load carrying member mounted on a vehicle

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GB0903114D0 GB0903114D0 (en) 2009-04-08
GB2467978A true GB2467978A (en) 2010-08-25
GB2467978B GB2467978B (en) 2013-06-12

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2631095A1 (en) * 2012-02-24 2013-08-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Electronic level control
EP3160781A4 (en) * 2014-06-24 2018-02-21 Hendrickson USA, L.L.C. Pneumatic control system for a heavy-duty vehicle
WO2019027382A3 (en) * 2016-12-01 2019-04-11 Ford Otomotiv Sanayi A.S. Trailer mode estimation method from rear suspension load
WO2021173092A1 (en) * 2020-02-28 2021-09-02 Tirsan Treyler Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Trailer maneuver assist system
SE2350109A1 (en) * 2023-02-06 2024-08-07 Scania Cv Ab Method of Operating an Air Suspension Arrangement, Computer Program, Computer-Readable Medium, Control Arrangement, and Vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116878927B (en) * 2023-09-06 2023-12-08 山东梁山华宇集团汽车制造有限公司 Running state detection system for trailer

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Publication number Priority date Publication date Assignee Title
DE4222922A1 (en) * 1992-07-11 1993-07-01 Daimler Benz Ag AIR-SUSPENSIONED DOUBLE AXLE UNIT
US5517847A (en) * 1994-12-16 1996-05-21 Ford Motor Company Open compartment load leveling ride height control
US20020014364A1 (en) * 1999-09-24 2002-02-07 William P. Bartlett Axle pressure control system
GB2387359A (en) * 2002-03-27 2003-10-15 Wheelbase Engineering Ltd Control system for lift axles
JP2004345440A (en) * 2003-05-21 2004-12-09 Isuzu Motors Ltd Height adjustment device
JP2005271796A (en) * 2004-03-25 2005-10-06 Sumitomo Rubber Ind Ltd Vehicle attitude adjusting device
US20060170168A1 (en) * 2005-01-28 2006-08-03 Rotz John F Automated control system for a vehicle lift axle
EP1812254A1 (en) * 2004-10-18 2007-08-01 Volvo Lastvagnar Ab An axle load control system and a wheel base adjustment system
EP1858748A1 (en) * 2005-03-02 2007-11-28 Volvo Lastvagnar Ab Vehicle suspension arrangement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222922A1 (en) * 1992-07-11 1993-07-01 Daimler Benz Ag AIR-SUSPENSIONED DOUBLE AXLE UNIT
US5517847A (en) * 1994-12-16 1996-05-21 Ford Motor Company Open compartment load leveling ride height control
US20020014364A1 (en) * 1999-09-24 2002-02-07 William P. Bartlett Axle pressure control system
GB2387359A (en) * 2002-03-27 2003-10-15 Wheelbase Engineering Ltd Control system for lift axles
JP2004345440A (en) * 2003-05-21 2004-12-09 Isuzu Motors Ltd Height adjustment device
JP2005271796A (en) * 2004-03-25 2005-10-06 Sumitomo Rubber Ind Ltd Vehicle attitude adjusting device
EP1812254A1 (en) * 2004-10-18 2007-08-01 Volvo Lastvagnar Ab An axle load control system and a wheel base adjustment system
US20060170168A1 (en) * 2005-01-28 2006-08-03 Rotz John F Automated control system for a vehicle lift axle
EP1858748A1 (en) * 2005-03-02 2007-11-28 Volvo Lastvagnar Ab Vehicle suspension arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2631095A1 (en) * 2012-02-24 2013-08-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Electronic level control
EP3160781A4 (en) * 2014-06-24 2018-02-21 Hendrickson USA, L.L.C. Pneumatic control system for a heavy-duty vehicle
WO2019027382A3 (en) * 2016-12-01 2019-04-11 Ford Otomotiv Sanayi A.S. Trailer mode estimation method from rear suspension load
WO2021173092A1 (en) * 2020-02-28 2021-09-02 Tirsan Treyler Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Trailer maneuver assist system
SE2350109A1 (en) * 2023-02-06 2024-08-07 Scania Cv Ab Method of Operating an Air Suspension Arrangement, Computer Program, Computer-Readable Medium, Control Arrangement, and Vehicle
WO2024167449A1 (en) * 2023-02-06 2024-08-15 Scania Cv Ab Method of operating an air suspension arrangement, computer program, computer-readable medium, control arrangement, and vehicle
SE546727C2 (en) * 2023-02-06 2025-02-11 Scania Cv Ab Method of Operating an Air Suspension Arrangement, Computer Program, Computer-Readable Medium, Control Arrangement, and Vehicle

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GB2467978B (en) 2013-06-12

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