Siemens Vdo Automotive Corporation

Siemens Automotive S.a.

Bendix Electronics S.a.

Dominique Salafia

Jean-Pierre Loncle

Jean-Michel Grimaud

Fran&ccedil;oise Rembaud

David Elenich

Jean-Jacques Kerjean

A system and method for detecting a stuck or malfunctioning fuel tank level sensor calculates an estimated fuel tank level sensor value and compares the estimated sensor value with the actual sensor value. Upper and lower threshold values may also be determined along with the estimated value. If the actual sensor value falls outside the threshold values, the sensor is considered faulty and an error signal is set in the system. The system also compares the actual sensor value with a reference sensor value to detect whether the fault is due to a stuck sensor or due to a different type of sensor malfunction.

System and method for detecting faulty fuel tank level sensor

Process for controlling an internal combustion engine equipped with an exhaust gas recirculation device (,) comprising a recirculation valve (,) and a device for regulating an air/fuel mixture injected into an inlet circuit as a function of the signal (LAM_AV) of an oxygen probe (,) placed in the exhaust circuit (,), characterized in that the controls of the valve (EGR_CTRL) are synchronized with at least one transition of a correction (LAM_COR) of the richness of the mixture in order to reduce the transient pollution peaks generated by the operating of the exhaust gas recirculation valve (,).

Method for controlling an internal combustion engine equipped with a device for recycling exhaust gases

The process and the device enable the electrical powering of a circuit having a conductor (1) with high thermal inertia by means of a transistor (3) with low thermal inertia. According to the invention, the device comprises a current limiter circuit (4,5,7,11), a voltage detector circuit (8) and a control microprocessor (6) which, according to a pre-established program, controls the flowing and stoppage of current in the power transistor (3) controlling the powering of the conductor (1) with high thermal inertia. Application to the control of lights in automobile vehicles.

Process and device for sending electrical current into a circuit using a

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Tournefeuille, France

Dominique Salafia