Valeo Climatisation

Valeo Systemes Thermiques

Christophe Bruzy

Bertrand Puzenat

Vincent Aubry

Laurent Rede

Philippe Richardot

In a motor vehicle air conditioning installation comprising a central control unit (), a computer network () connected to the central control unit () and a plurality of peripherals (10, 10, 10, . . . , 10) connected to nodes (N, N, N, . . . , N) of the computer network, the peripherals are connected in series via a common conductor (). The installation comprises means () for inputting at the level of each peripheral an electric signature on a common conductor, means () for detecting an electric signal depending upon the electric signatures of the peripherals situated upstream on the common conductor (), means for generating a data item representing the relative position of the peripheral on the basis of the electric signal detected, and means for identifying the node of the network to which it is connected on the basis of the relative position data item generated. The identification of the node of the network permits the assignment of an address or monitoring of the connection of the peripheral from the central control unit.

Method of identification of the nodes of a computer network in an air conditioning installation of a motor vehicle, and air conditioning installation using the method

In a motor vehicle air conditioning installation comprising a central control unit (), a computer network () connected to the central control unit () and a plurality of peripherals () connected to nodes (N, N, N, . . . , N) of the computer network, the peripherals are connected in series via a common conductor (). The installation comprises means () for inputting at the level of each peripheral an electric signature on a common conductor, means () for detecting an electric signal depending upon the electric signatures of the peripherals situated upstream on the common conductor (), means for generating a data item representing the relative position of the peripheral on the basis of the electric signal detected, and means for identifying the node of the network to which it is connected on the basis of the relative position data item generated. The identification of the node of the network permits the assignment of an address or monitoring of the connection of the peripheral from the central control unit.

Method of identifying nodes in a computer network in a motor vehicle air conditioning installation

A flap to be identified is caused to move over the whole of its angular range of travel. The number of motor steps is counted during this movement, and the number of steps counted is compared with at least one pre-recorded information item corresponding to a particular flap or type of flap. The method is applicable to the checking of the correct fitting of actuator housings in an air-conditioning installation, or to the allocation of addresses to actuators connected to an information bus.

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Beynes, France

Christophe Bruzy