Continental Automotive France

Continental Automotive Gmbh

Jean-Pierre Delcol

Aurore Desgeorge

Angelo Pasqualetto

A voltage regulation system, particularly for a motor vehicle, adapted to be connected to a voltage source in order to provide a regulated voltage Vto at least one functional component F, the regulation system including a pre-regulator adapted to be connected to a voltage source and a regulator REG including at least one pre-regulation port Padapted to be connected to the pre-regulator and one functional port Padapted to be connected to a functional component, the regulator including an adaptation device Q directly connecting the pre-regulation port to the functional port of the regulator, the adaptation device consisting of a single MOS power transistor including a drain D, a source S and a gate G. The MOS transistor includes an intrinsic diode DIODE between its drain and its source which is oriented to block the flow of a current between the functional port and the pre-regulation port.

Voltage regulation system

A variable-reluctance magnetic detection head delivers an electrical signal (Uin) and a rising wavefront of the electrical signal is compared with a first threshold (Th) in order to switch from a first state (B) to a second state (B), and a falling wavefront is compared with a second threshold (Tb) lower than the first threshold (Th) in order to switch from the second state (B) to the first state (B). In a diagnostics step, the first threshold (Th) or the second threshold (Tb) is modified, bringing these thresholds closer together, and a magnetic detection head is diagnosed as being defective if the duty cycle of the second state (B) is modified during the diagnostics step by a value higher than a diagnostics threshold predetermined in relation to a reference level.

Method for diagnosing a variable reluctance magnetic detection head, and detection circuit

A device for filtering a signal delivered as output from a sensor installed in a motor vehicle includes a comparator (A) offering as output a first logic signal (S) representative of the positive and negative transitions of the output signal (S) from the sensor, a clock (G) delivering a signal (S) serving as time base for the whole device, elements (E, D, F) making it possible to fix a filtering time (T) of the output signal (S) from the sensor, a suppression block (B) receiving as input the first logic signal (S) and delivering as output a second logic signal (S) whose duration of holding (tn) in a logic state depends on the filtering time (T), and a control block (C) managing the set of the signals of the device, and having as input signals the first and second logic signals (S, S).

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Tournefeuille, France

Jean-Pierre Delcol