Valeo Systemes Thermiques

Valeo Climatisation

Bertrand Puzenat

Philippe Vincent

Laurent Tellier

Gilbert Terranova

Morgan Le Goff

Vincent Aubry

Christophe Bruzy

Laurent Rede

Thierry Elbhar

Serif Karaaslan

Frederic Pierron

Jonathan Fournier

Erwan Gogmos

Jose Leborgne

Frédéric Pierron

Frèdèric Pierron

Jean Gatinois

Stephane Souza

Laetitia Gestas

Alain Renard

Jean-Baptiste Audoye

Mickael Bigey

José Leborgne

Laetitia Raulin-Gestas

The present invention relates to a method for detecting overheating of an electrical heating device comprising a plurality of resistive elements configured to be supplied electrically using a control signal by pulse width modulation according to a setpoint, comprising the following steps: —detecting the setpoint, —detecting the duty cycle (PWM_system; PWM_subsystem), —defining a threshold value for detecting the duty cycle according to the setpoint, or a value of at least one parameter for monitoring an incidence of overheating, —comparing the detected duty cycle value with the detection threshold value, and —detecting an incidence of overheating when the detected duty cycle value reaches the detection threshold value. The invention also relates to a corresponding control unit.

Method for detecting overheating of a heating device, and corresponding control unit

The invention relates to an electrical connection device () for electrically connecting a first pad () and a second pad () of an electrical power source () and electrical contacts () of heating modules (), the first pad () having a first electrical potential that differs from that of the second pad (), said connection device () comprising: —at least one first electrically conductive tongue (), intended to be electrically connected to the first pad () and to at least one electrical contact () of at least one heating module (); —at least two second electrically conductive tongues (), intended to be electrically connected to the second pad (), and to other electrical contacts () of at least one heating module (), characterized in that the connection device () is electrically capable of electrically connecting the first pad () and the second pad () and the electrical contacts () of a single heating module () and that the connection device () is also capable of electrically connecting the first pad () and the second () and the electrical contacts () of multiple heating modules (), the number of electrical contacts () of this heating module () and of each of these heating modules () potentially being variable.

Electrical connection device for a heating device

A device () for controlling an electrical heating circuit () comprising a number N of heating elements (-) connected in parallel, comprises, according to the invention: N electronic switches (T-T), each able to be connected in series with one of the N heating elements (-); a module () able to receive a power setpoint in the form of a control signal (PWM) with duty ratio varying as a function of power; means () for extracting a mean value (formula (I)) of the control signal (PWM) received; and P comparators (C-C), the integer P being less than or equal to N, which are able to compare the mean value (formula (I)) extracted with P distinct threshold values (Ref-Ref) and to generate P comparison signals (S-S), each comparison signal serving to control a toggling of the electronic switch (T-T) associated with at least one heating element into the open or closed position.

Control for electrical heating circuit, in particular for motor vehicle

The invention relates to a control module () for an electric appliance (), comprising a printed circuit board () whereon electrical and electronic components () are mounted along with at least one power transistor () fixed to a first region () of the printed circuit board () and comprising a drain (D) connected to a first electrically conductive track () of said first region () and a source (S) connected to a second electroconductive track () of a second region () of the printed circuit board (). At least one opening () forms a material discontinuity between the first and second regions () of the printed circuit board (), said opening () being arranged between the first and second conductive tracks ().

Control module for an electric appliance

An electrical or electronic device () capable of being supplied with two different values of voltage from respectively a first electrical network () and from a second electrical network (), comprises: a first connecting interface () capable of being linked, under normal connection conditions, with a ground conductor (GND_) and a voltage conductor of the first electrical network (); a second connecting interface () capable of being linked, under normal connection conditions, with the ground conductor (GND_) and a voltage conductor of the second electrical network (); the ground connections of the two connecting interfaces () being linked together to form a common ground; and at least one switch module () interposed in series on the common ground, the switch module being capable of switching into an open position following a modification in the connection conditions of the first or second interface.

Electrical or electronic device with two supply voltages

The invention relates to a device for electrically heating fluid for a motor vehicle, characterized in that it comprises: at least one heating module () comprising at least one heating element () and defining a circuit () for guiding the fluid to be heated; a means () for controlling the heating element (), comprising an electric current switch () connected to said heating element () and a heat sink () having a first surface (), which is to contact the fluid, and a second surface (), which is to contact a sole plate () of said electric current switch (). The invention also relates to a heating and/or air-conditioning apparatus for a motor vehicle, including at least one such electric-heating device ().

Device for electrically heating fluid for a motor vehicle, and related heating and/or air-conditioning apparatus

The invention relates to a device for controlling a complementary electric radiator (R) installed in a ventilation system used in the automotive sector, said device including at least two electronic modules each including a computer, a control module () capable of sending operating commands to the radiator and a management module (), which is implemented within the electric radiator (R) in order to manage the operation thereof on the basis of commands received from the control module (). According to the invention, the control module () includes a unit for generating and transmitting a PWM signal representative of the operating commands being sent to the radiator (R) over a communication wire () connected to the management module () and a unit for reading the signal travelling over the communication wire (); the management module () includes a unit for altering the PWM signal travelling over the communication wire on the basis of detected events in the operation of the radiator (R).

Device and method for controlling an electric radiator of an automotive ventilating, heating and/or air-conditioning system

The invention relates to a method for measuring a current or voltage output quantity of a switched-mode power supply circuit (H), referred to as a chopper circuit, of period T and of cyclic ratio &#x3b1;, belonging to the interval]0; 1[, such that, at each period, the supply current is non-zero during an 'ON' phase of duration &#x3b1;T, and zero during an 'OFF' phase of duration (1&#x2212;&#x3b1;)T. The measurement method includes the following steps: measuring the value Gof an image of the output quantity during an &#x201c;ON&#x201d; phase; measuring the value Gof an image of the output quantity during an &#x201c;OFF&#x201d; phase; calculating the difference &#x394;G=G&#x2212;G; and using the difference &#x394;G for evaluating the output quantity.

Current measurement for an electric heater

The invention pertains to an electronic control module () for a motor vehicle electrical circuit (), intended to be linked in a galvanically isolated manner to a motor vehicle electrical circuit () comprising at least one functional module () powered at high voltage, the control module comprising: &#x2014;a connection bus (), intended to be linked to an exterior interface (), configured so as to conduct low-voltage electrical setpoint signals, emanating from the exterior interface () to the elements of the control module () to which they are addressed, &#x2014;a microcontroller (), configured to control the at least one functional module () as a function of the setpoint signals, characterized in that the microcontroller () and the connection bus () are linked by a non-galvanic coupler (), provided with a low-voltage part () and with a high-voltage part (), which are able to exchange at least one signal and are galvanically decoupled, and in that the control module furthermore comprises an electrical transformer (), linked via outputs () to the high- and low-voltage parts () of the non-galvanic coupler () and to the microcontroller () so as to provide their power supply, the transformer () being linked to a low-voltage source () via a breaker switch (), and the connection bus () comprising a switching member () controlling the open or closed state of the breaker switch ().

Method and system for disabling and enabling an electric motor vehicle control module

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.

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Montigny le Bretonneux, France

Bertrand Puzenat