Tire pressure regulating device with a pneumatically pilot-controlled relay valve

Patent metadata

Field	Value
Publication number	US-10569604-B2
Application number	US-201715454708-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Sep 10, 2014
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A pressure regulating device is provided for at least one tire of a commercial vehicle, having a relay valve which performs compressed air loading of a working line which leads to the tire starting from a pressure source in accordance with a pneumatic pilot controller which has an electropneumatic converter for converting an electric actuating signal into a corresponding pneumatic pilot control signal for the relay valve. The converter has an electropneumatic aeration valve and an electropneumatic ventilating valve for pneumatic signal specifying for increasing or reducing the tire pressure. The pneumatic signal specifying takes place according to special regulations.

First claim

What is claimed is:

1. A method of regulating the pressure of at least one tire of a utility vehicle, using a relay valve with which compressed air loading or compressed air venting of a working line extending from a pressure source and leading to the tire is performed in accordance with a pneumatic pilot controller with which an electrical actuation signal is converted into a pneumatic pilot control signal, corresponding to a setpoint tire pressure, for the relay valve, the method comprising the acts of:
in an event of a low actual tire pressure and/or a high setpoint tire pressure in an initial phase of an aeration of the tire predefining by an electronic control unit a higher pressure than the setpoint tire pressure in order to accelerate the aeration; and
in the event of a high actual tire pressure and/or a low setpoint tire pressure at a start of a venting of the tire, predefining a lowest possible pressure above a switch-off pressure of a wheel valve by the electronic control unit in order to accelerate the venting.

2. The method according to claim 1 , wherein
an initial increase or decrease with respect to the setpoint tire pressure which is to be set is predefined based on a characteristic curve stored in the electronic control unit or formed therein.

3. The method according to claim 2 , wherein
the electronic control unit performs signal processing of both the tire pressure measured with a pressure sensor and further measurement signals, originating from an on-board pneumatic system, for determining the pneumatic pilot control signal, and
an inflation time of the tire is calculated based on the signal processing in order to carry out aeration of the tire in a calculated time period.

4. The method according to claim 3 , wherein
the electronic control unit newly calculates an inflation time after modification of the tire pressure and/or of the further measurement signals of the on-board pneumatic system.

5. The method according to claim 4 , wherein
the electronic control unit prevents or interrupts the aeration if the evaluation of the further measurement signals of the on-board pneumatic system indicates that execution of a higher priority basic function of the on-board pneumatic system from the compressed air requirement of the tire inflation would be jeopardized.

6. The method according to claim 1 , wherein
the increasing of the aeration or the decreasing of the venting of the tire is stopped by the electronic control unit if the tire pressure measured by a pressure sensor has reached at least 90% of the setpoint tire pressure.

7. The method according to claim 6 , wherein the electronic control unit records a pressure profile plotted over time determined by the pressure sensor.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Kantor Kornel
• Toth Janos
• Toth Tamas

Classifications

• B60C23/0408 Primary

  transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver · CPC title

• B60C23/00354 Primary

  Details of valves · CPC title

• B60C23/00372 Primary

  characterised by fluid diagrams · CPC title