Method for managing an engine of a vehicle to avoid over-acceleration

A method for managing a motor of a vehicle, said vehicle comprising:

• means for controlling said motor by a driver;
• first electronic means (L1) receiving a signal (PP) as input representing an action on said control means and/or signals (SC) received from sensors, determining a torque demand (TQ_req) to be supplied by the motor based on these signals, and supplying a torque control signal (TQ_spt) to the motor as output;
• and
• second electronic means (L2) for controlling the first electronic means (L1);
• receiving the aforementioned signals (PP) as input that are received as input by the first electronic means (L1), as well as data determined by the first electronic means (L1);
• computing the torque to be supplied by the motor (TQ_mod), with a torque limited to a value TQ_lim during the operation of the motor in limp-home mode;
• and
• transmitting instructions to the first electronic means (L1) for optionally adapting the torque demand determined by the first electronic means (L1) so that the torque control signal (TQ_spt) output from the first electronic means (L1) corresponds to said torque to be supplied by the motor (TQ_mod);
• said method comprising the following steps:
• computing a first over-acceleration corresponding to a variation over time of the torque demand (TQ_req) determined by the first electronic means (L1);
• computing a second over-acceleration corresponding to a variation over time of the torque to be supplied by the motor (TQ_mod) computed by the second electronic means (L2);
• determining the difference between the value of the first over-acceleration and the value of the second over-acceleration;
• comparing said difference with a predetermined limit value (JK_lim) and, if this difference in terms of absolute value is less than said limit value, the torque control instructions from the second electronic means to the first electronic means are maintained and, otherwise, they are modified so that the computed difference becomes less in terms of absolute value than said limit value.