GB2477816A - Central tyre inflation systems - Google Patents

Central tyre inflation systems Download PDF

Info

Publication number
GB2477816A
GB2477816A GB1009443A GB201009443A GB2477816A GB 2477816 A GB2477816 A GB 2477816A GB 1009443 A GB1009443 A GB 1009443A GB 201009443 A GB201009443 A GB 201009443A GB 2477816 A GB2477816 A GB 2477816A
Authority
GB
United Kingdom
Prior art keywords
vehicle
wheel hub
chamber
tyre inflation
compressed air
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Withdrawn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
GB1009443A
Other versions
GB201009443D0 (en
Inventor
Ronald Padfield
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.)
SUPACAT Ltd
Original Assignee
SUPACAT Ltd
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 SUPACAT Ltd filed Critical SUPACAT Ltd
Publication of GB201009443D0 publication Critical patent/GB201009443D0/en
Publication of GB2477816A publication Critical patent/GB2477816A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00309—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors
    • B60C23/00318—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by the location of the components, e.g. valves, sealings, conduits or sensors on the wheels or the hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
    • B60C23/00363—Details of sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
    • B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

A central tyre inflation system is provided for a vehicle having a plurality of wheel hub assemblies (g). The system includes means for the controlled supply of compressed air to a chamber within each of the wheel hub assemblies (g). Each chamber is bounded by seals (c and d) that act between a stub axle tube (b) and a hub extension (a).

Description

CENTRAL TYRE INFLATION SYSTEMS
Field of the Invention
This invention relates to central tyre inflation systems for motor vehicles.
On motor vehicles, it is desirable to check and adjust the tyre pressures regularly and to set the tyre pressures at different values according to the load carried on the vehicle, the type of terrain over which the vehicle is being driven and the speed at which the vehicle is expected to travel. On certain types of vehicle, particularly all-terrain vehicles, it is desirable that pressure adjustment can be carried out automatically and while the vehicle is moving.
A system for carrying out such pressure adjustment is known as a central tyre inflation system and comprises a compressed air source and a control module.
It is necessary, as part of this system, to provide a pneumatic connection between each rotating wheel and its axle. This is typically achieved by means of a rotary joint that includes a first component that rotates with the wheel and a second, stationary component that is fixed to the axle.
Two seals act between the first and second components and a chamber is defined between the two seals. Ports or openings are formed in the first and second components to provide access to the chamber.
If the axle is hollow, the connection to the stationary component may be made through the hollow axle, but this can be difficult to achieve when drive is provided by a rotating drive shaft passing through the hollow axle.
A piped connection to the stationary component may alternatively be made outside the wheel, but the piped connection will be vulnerable to mechanical damage when the vehicle is driven off-road.
It is accordingly an object of the present invention to provide an improved vehicle central tyre inflation system.
A more specific objection of the present invention is to provide an improved vehicle wheel hub assembly.
Summary of the Invention
According to a first aspect of the present invention there is provided a central tyre inflation system for a vehicle having a plurality of wheel hub assemblies, the system including means for the controlled supply of compressed air to a chamber within each of the wheel hub assemblies, and each chamber being bounded by seals that act between a stub axle tube and a hub extension.
The stub axle tubes and the associated hub extensions are preferably provided with inlet and outlet ports formed by drilling for the flow of compressed air into and out of the chambers.
According to a second aspect of the present invention there is provided a vehicle wheel hub assembly for a vehicle, the wheel hub assembly including a chamber to which compressed air can be supplied and from which the compressed air can be delivered, and the chamber being bounded by seals that act between a stub axle tube and a hub extension.
Brief Description of the Drawing
The single figure of the accompanying drawing is a sectional view of a vehicle wheel hub assembly.
Description of the Preferred Embodiment
The wheel hub assembly shown in the drawing comprises a drive shaft f that transmits drive to a wheel hub e that is rotatable relative to a stub axle tube b. A wheel bearing assembly g is disposed between the wheel hub e and the stub axle tube b to permit free rotation of the wheel hub e relative to the stub axle tube b.
A hub extension a is attached to the wheel hub e and two seals c and d act between the hub extension a and the stub axle tube b. Seal c is an outer seal and seal d is an inner seal and a chamber between the hub extension a and the stub axle tube b is defined by the two seals c and d, which are of generally U-shape in cross-section, as can be seen from the drawing. This chamber is connected to a compressed air supply (not shown) via an inlet port h in the form of a hole drilled in the stub axle tube b. The chamber is also connected to the interior of a tyre fitted on the wheel hub e via an outlet port j in the form of a hole drilled in the hub extension a.
A control module (not shown) on the vehicle controls the supply of compressed air to the chamber between the two seals c and d in dependence on, for example, the vehicle speed, the load being carried by the vehicle and the nature of the terrain over which the vehicle is being driven.
The hub extension a that carries the inner seal d and the outer seal c is a separate component and thus can be made of a different material from the hub e, more specifically a lighter material thus providing a weight-saving advantage. If a vehicle does not have a central tyre inflation system, the same components can be used for manufacture of the wheel assembly, apart from the hub extension a and the two seals c and d. The use of common components simplifies manufacturing procedures and reduces costs.
The inlet port h and the outlet port j are formed by straight bores that can be formed by simple drilling operations, without the need for cross-drilling or plugs, again providing cost-saving advantages.

Claims (7)

  1. Claims:- 1. A central tyre inflation system for a vehicle having a plurality of wheel hub assemblies, the system including means for the controlled supply of compressed air to a chamber within each of the wheel hub assemblies, and each chamber being bounded by seals that act between a stub axle tube and a hub extension.
  2. 2. A central tyre inflation system as claimed in Claim 1, in which the stub axle tubes and the associated hub extensions are provided with inlet and outlet ports formed by drilling for the flow of compressed air into and out of the chambers.
  3. 3. A central tyre inflation system substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
  4. 4. A vehicle having a central tyre inflation system as claimed in Claim 3.
  5. 5. A vehicle wheel hub assembly for a vehicle, the wheel hub assembly including a chamber to which compressed air can be supplied and from which the compressed air can be delivered, and the chamber being bounded by seals that act between a stub axle tube and a hub extension.
  6. 6. A vehicle wheel hub assembly substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
  7. 7. A vehicle having a plurality of wheel hub assemblies as claimed in Claim 6.
GB1009443A 2010-02-12 2010-06-07 Central tyre inflation systems Withdrawn GB2477816A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1002350.5A GB201002350D0 (en) 2010-02-12 2010-02-12 Central tyre inflation systems

Publications (2)

Publication Number Publication Date
GB201009443D0 GB201009443D0 (en) 2010-07-21
GB2477816A true GB2477816A (en) 2011-08-17

Family

ID=42110592

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1002350.5A Ceased GB201002350D0 (en) 2010-02-12 2010-02-12 Central tyre inflation systems
GB1009443A Withdrawn GB2477816A (en) 2010-02-12 2010-06-07 Central tyre inflation systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1002350.5A Ceased GB201002350D0 (en) 2010-02-12 2010-02-12 Central tyre inflation systems

Country Status (1)

Country Link
GB (2) GB201002350D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013152270A1 (en) * 2012-04-06 2013-10-10 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
WO2013154976A1 (en) * 2012-04-09 2013-10-17 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
EP3106325A1 (en) * 2015-06-16 2016-12-21 Poclain Hydraulics Industrie Pneumatic system for tyre inflation built into a motorised axle
EP3318427A1 (en) * 2016-11-04 2018-05-09 DANA ITALIA S.r.l. Rotary joint assembly for a tire inflation system
US10059156B2 (en) 2012-04-09 2018-08-28 Dana Heavy Vehicle Systems Group, Llc Hub assembly for a tire inflation system
WO2019002774A1 (en) * 2017-06-30 2019-01-03 Poclain Hydraulics Industrie Improved steering pivot pin forming an internal pneumatic passage
US10556469B2 (en) 2015-09-17 2020-02-11 Dana Heavy Vehicle Systems Group, Llc Hub cap assembly and a wheel end assembly for a tire inflation system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111976392A (en) * 2020-08-25 2020-11-24 一汽解放汽车有限公司 Central inflation/deflation wheel edge system and automobile

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1521375A (en) * 1975-03-25 1978-08-16 Tsuruta Y Controlling the internal pressure in a pneumatic tyre on a vehicle
US4440451A (en) * 1981-10-16 1984-04-03 Am General Corp. Vehicle hub with bearing removable feature
EP0130476A2 (en) * 1983-06-30 1985-01-09 Rockwell International Corporation An axle for use with a tire inflation system
EP0204085A2 (en) * 1981-07-31 1986-12-10 AM General Corporation Wheel assembly
GB2223207A (en) * 1988-09-29 1990-04-04 Gkn Axles Stub axle with air passage
WO2004065143A1 (en) * 2003-01-23 2004-08-05 Fusco, Angelo Airtight coaxial hub to regulate the internal pressure of tyres even when the vehicle is riding
EP1559591A2 (en) * 2004-01-27 2005-08-03 ArvinMeritor Technology, LLC Central tire inflation system for drive axle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1521375A (en) * 1975-03-25 1978-08-16 Tsuruta Y Controlling the internal pressure in a pneumatic tyre on a vehicle
EP0204085A2 (en) * 1981-07-31 1986-12-10 AM General Corporation Wheel assembly
US4440451A (en) * 1981-10-16 1984-04-03 Am General Corp. Vehicle hub with bearing removable feature
EP0130476A2 (en) * 1983-06-30 1985-01-09 Rockwell International Corporation An axle for use with a tire inflation system
GB2223207A (en) * 1988-09-29 1990-04-04 Gkn Axles Stub axle with air passage
WO2004065143A1 (en) * 2003-01-23 2004-08-05 Fusco, Angelo Airtight coaxial hub to regulate the internal pressure of tyres even when the vehicle is riding
EP1559591A2 (en) * 2004-01-27 2005-08-03 ArvinMeritor Technology, LLC Central tire inflation system for drive axle

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9308786B2 (en) 2012-04-06 2016-04-12 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
WO2013152270A1 (en) * 2012-04-06 2013-10-10 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
RU2592976C2 (en) * 2012-04-06 2016-07-27 Дана Хеви Виикл Системз Груп, Ллк Tyre inflation system
AU2013243354B2 (en) * 2012-04-06 2015-11-26 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
US9592708B2 (en) 2012-04-09 2017-03-14 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
RU2586749C2 (en) * 2012-04-09 2016-06-10 Дана Хеви Виикл Системз Груп, Ллк Tyre inflation system
AU2013246191B2 (en) * 2012-04-09 2015-11-12 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
US9446637B2 (en) 2012-04-09 2016-09-20 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
WO2013154976A1 (en) * 2012-04-09 2013-10-17 Dana Heavy Vehicle Systems Group, Llc Tire inflation system
US10059156B2 (en) 2012-04-09 2018-08-28 Dana Heavy Vehicle Systems Group, Llc Hub assembly for a tire inflation system
EP3106325A1 (en) * 2015-06-16 2016-12-21 Poclain Hydraulics Industrie Pneumatic system for tyre inflation built into a motorised axle
FR3037533A1 (en) * 2015-06-16 2016-12-23 Poclain Hydraulics Ind PNEUMATIC SYSTEM FOR INTEGRATED WHEEL INFLATION WITH A MOTORIZED AXLE
US10675923B2 (en) 2015-06-16 2020-06-09 Pocalin Hydraulics Industrie Pneumatic system for inflating a wheel, integrated to a driven axle
US10556469B2 (en) 2015-09-17 2020-02-11 Dana Heavy Vehicle Systems Group, Llc Hub cap assembly and a wheel end assembly for a tire inflation system
CN109890630A (en) * 2016-11-04 2019-06-14 意大利德纳有限责任公司 Rotary joint assembly for tire inflation system
WO2018082963A3 (en) * 2016-11-04 2018-11-15 Dana Italia S.R.L. Rotary joint assembly for a tire inflation system
EP3318427A1 (en) * 2016-11-04 2018-05-09 DANA ITALIA S.r.l. Rotary joint assembly for a tire inflation system
US11298988B2 (en) 2016-11-04 2022-04-12 Dana Italia S.R.L. Rotary joint assembly for a tire inflation system
CN109890630B (en) * 2016-11-04 2022-08-02 意大利德纳有限责任公司 Rotary joint assembly for tire inflation system
WO2019002774A1 (en) * 2017-06-30 2019-01-03 Poclain Hydraulics Industrie Improved steering pivot pin forming an internal pneumatic passage
FR3068299A1 (en) * 2017-06-30 2019-01-04 Poclain Hydraulics Industrie IMPROVED STEERING PIVOT FORMING AN INTERNAL PNEUMATIC PIPE
US11654728B2 (en) 2017-06-30 2023-05-23 Poclain Hydraulics Industrie Steering pivot pin forming an internal pneumatic passage

Also Published As

Publication number Publication date
GB201002350D0 (en) 2010-03-31
GB201009443D0 (en) 2010-07-21

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)