| 摘要 |
The subject of the invention is a system for managing the torque at a wheel of a vehicle coupled to an electric machine (14) that can be driven to provide traction or braking according to instructions applied on the basis of driver commands. The system described by way of example comprises two control pedals (32, 33), one for electric acceleration and the other for electric braking, which can be actuated by the driver in a given operating range. A sensor (54) that senses the displacement of each pedal as a function of inputs from the driver is able to produce a signal (42, 43) of which the variation within a given interval normally provides a measurement of the displacement of the pedal in the said operating range. This measurement signal is detected by a fault detector (108) which provides an anomaly indication if its value deviates outside either end of the said given variation interval. A second, on/off sensor, is sensitive to the crossing of a predetermined level of input by the control member and provides a corresponding binary indication. The fault sensor is able to provide an indication of anomaly if the measurement signal and the said crossing indication are inconsistent with one another. A datum generator (101, 103) is operational as a function of the measurement signal and of the anomaly indications of the fault detector in order to formulate a torque datum which corresponds to the said measurement signal, in the case of normal operation, and a safety datum, in the event of an anomaly, and to apply the resulting safe torque datum to control the machine as a function of the control parameter concerned. |
