Tyre inflation pressure control system

Patent metadata

Field	Value
Publication number	US-2021070116-A1
Application number	US-201816771803-A
Country	US
Kind code	A1
Filing date	Nov 6, 2018
Priority date	Dec 13, 2017
Publication date	Mar 11, 2021
Grant date	—

Abstract

A tyre inflation pressure control system including a vehicle wheel having a tyre interior providing a first fluid chamber and an air reservoir providing a second fluid chamber. A first valve arrangement is installed remote from the wheel and is connectable to a pressurised fluid source. A second valve arrangement, suitably mounted on the wheel, is connected to the first valve arrangement by means of first and second fluid connections. The second valve arrangement is controllably operable to connect the first fluid connection to either fluid chamber. Controlled variation of fluid pressure in and between the fluid connections is provided by the first valve arrangement to control said second valve arrangement for operating the tyre pressure control system to connect the second fluid chamber to the first valve arrangement, and to connect the first and second fluid chambers.

First claim

1 . A tyre inflation pressure control system comprising:
a vehicle wheel providing a first fluid chamber and a second fluid chamber; a first valve arrangement installed remote from the wheel and connectable to a pressurised fluid source; a second valve arrangement connected to the first valve arrangement by a first fluid connection and a second fluid connection, wherein the second valve arrangement is controllably operable to connect the first fluid connection to the first fluid chamber and the second fluid chamber on the vehicle wheel;
wherein controlled variation of fluid pressure in the second fluid connection and the first fluid connection is provided by the first valve arrangement configured to control the second valve arrangement for operating the tyre pressure control system in at least two operating modes comprising:
a first mode, in which the second fluid chamber is connected to the first valve arrangement; and
a second mode, in which the first fluid chamber is connected to the second fluid chamber.

2 . The tyre inflation pressure control system as claimed in claim 1 , wherein the first valve arrangement configured to control the second valve arrangement for operating the system is further configured for a third operating mode in which the first fluid chamber is connected to the first valve arrangement.

3 . The tyre inflation pressure control system of claim 1 , wherein the second valve arrangement comprises a first pressure control valve configured in a first operating position in which fluid pressure on an input activates a first main valve connecting the first fluid chamber to the first fluid connection.

4 . The tyre inflation pressure control system as claimed in claim 3 , wherein the second valve arrangement further comprises a second pressure control valve configured in a first operating position in which fluid pressure on an input activates a second main valve connecting the second fluid chamber to the first fluid connection.

5 . The tyre inflation pressure control system as claimed in claim 4 , wherein the input to the first pressure control valve is connected to the second fluid connection, the first pressure control valve configured in a second operating position in which fluid pressure on the input is passed to the input of the second pressure control valve, the second pressure control valve configured in a second operating position in which fluid pressure on the input activates both the first and the second main valves connecting the first and second fluid chambers to each other.

6 . The tyre inflation pressure control system as claimed in claim 5 , wherein each of the first and the second pressure control valves has an output in the first position connected to a respective delay valve which, when charged, urges the respective pressure control valve to the respective second position.

7 . The tyre inflation pressure control system of claim 1 , wherein the second valve arrangement is mounted on the wheel.

8 . The tyre inflation pressure control system of claim 1 , wherein the wheel has a pneumatic tyre mounted on a rim portion of the wheel, and the first fluid chamber is defined by the rim portion and an interior of the tyre.

9 . The tyre inflation pressure control system of claim 1 , wherein the second fluid chamber is a pressure reservoir vessel mounted on the wheel.

10 . The tyre inflation pressure control system as claimed in claim 8 , wherein the second fluid chamber is an inner tyre mounted on the rim portion within the first chamber.

11 . A utility vehicle comprising the tyre inflation pressure control system of claim 1 .

12 . The utility vehicle as claimed in claim 11 , further comprising the pressurised fluid source and a chassis, wherein the first valve arrangement is connected to the pressurised fluid source and installed on the vehicle chassis.

Assignees

• Agco Int Gmbh

Inventors

• Sodermanns Felix

Classifications

• B60C23/00372 Primary

  characterised by fluid diagrams · CPC title

• B60C23/00318 Primary

  on the wheels or the hubs · CPC title

• B60C23/00354 Primary

  Details of valves · CPC title

• B60C23/16

  Arrangement of air tanks mounted on vehicles · CPC title

• 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 · CPC title