SYSTEM AND METHOD FOR CONTROLLING THE RELEASE OF AN AUTOMATIC PARKING BRAKE DEVICE ONBOARD AN AUTOMOBILE

摘要

The invention relates to a system (1) for controlling the release of an automatic parking brake (2) onboard an automobile, that comprises a means (3) for estimating the torque transmitted by the clutch, a sensor (4) for measuring the inclination angle (?tat) of the rolling surface, and a means (5) for controlling the release of the parking brake device (2) comprising a first means (6) for comparing the torque (ECT) transmitted by the clutch with a continuous threshold torque (CTseuil) depending on the inclination angle (?tilt gelée) of the rolling surface at the end of the vehicle stop. The threshold torque (CTseuil) is an even function of the inclination angle (?tilt gelée) of the rolling surface at the end of the vehicle stop, and comprises a first decreasing portion for the values of the inclination angle (?tilt gelée) of the rolling surface at the end of the vehicle stop lower than a first negative threshold (seuil1), a second constant and positive portion for the values of the inclination angle (?tilt gelée) of the rolling surface at the end of the vehicle stop between the first negative threshold (seuil1) and a second positive threshold (seuil2), and a third increasing portion for the values of the inclination angle (?tilt gelée) of the rolling surface at the end of the vehicle stop higher than said second positive threshold (seuil2).