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DIAGNOSIS OF COMPONENTS OF AN ELECTRONIC LEVEL CONTROL SYSTEM

IP.com Disclosure Number: IPCOM000246377D
Publication Date: 2016-Jun-02
Document File: 8 page(s) / 173K

Publishing Venue

The IP.com Prior Art Database

Abstract

Vehicles, such as trucks or busses, are often equipped with an electronic level control (ELC) system through which the level of the chassis may be controlled. A malfunctioning of the ELC system may cause damage to the components of the vehicle. The damages may cause the vehicle to be taken off the road for a certain time and/or components to have to be replaced or repaired. The present invention relates to a method and a system for diagnosing components of the ELC system of a vehicle by performing a diagnosis of the pressure and level sensors.

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DIAGNOSIS OF COMPONENTS OF AN ELECTRONIC LEVEL CONTROL SYSTEM

ABSTRACT

Vehicles, such as trucks or busses, are often equipped with an electronic level control (ELC) system through which the level of the chassis may be controlled. The electronic level control system comprises at least one air bellow arranged to adjust the level of the chassis, at least one valve arranged to control the addition or extraction of gas in the air bellow, at least one pressure sensor arranged to determine the pressure in the air bellow and at least one level sensor arranged to determine the level of the chassis in relation to a wheel axle.

The level of the chassis of the vehicle may be adjusted by adding or subtracting gas to the at least one air bellow via the valve. In addition, the weight distribution on the different wheel axle may be adjusted by regulating the pressure in the at least one air bellow.

In order to have a functioning ELC system, it is of importance that the components of the ELC system are intact and mounted correctly.

A malfunctioning of the ELC system may cause damage to the components of the vehicle. The damages may cause the vehicle to be taken off the road for a certain time and/or components to have to be replaced or repaired.

The present invention relates to a method and a system for diagnosing components of the ELC system of a vehicle.  

According to one aspect of the present invention, a request to change the relative level of the chassis is sent to a control unit in the vehicle. If the components of the ELC system functions Inadequately, this change in chassis level will be performed by means of adding or subtracting gas in the air bellows depending on whether the level of the chassis should be increased or decreased. This change of amount of gas in the air bellows will induce a pressure change in the air bellows. This pressure change is detectable by the respective pressure sensors. In addition, the change of amount of gas in the air bellows will induce a change in the chassis level. The level difference of the chassis is detectable by the respective level sensors.

In order to diagnose the components of the ELC system, data is collected from the at least one pressure sensor and from the at least one level sensor during and possibly also after the level change of the chassis.

The data may be analysed by means of a control unit and from this data analysis, it may be concluded whether the components of the ELC system are functioning correctly. Hereby the ELC system is diagnosed.

BACKGROUND ART     

Vehicles are often equipped with an electronic level control (ELC) system which controls the chassis level of the vehicle and also the air suspension of the vehicle.

The ELC system comprises at least one air bellow arranged at one or more wheel axles. A pressure sensor is connected to said at least one air bellow. A gas source is connected to the air bellow via a valve. In addition, the ELC system comprises at least one level sensor which...