Method for recovering torque for an engine during automatic control

Abstract

The invention concerns a method for recovering torque for a motor vehicle engine during automatic control delivering a torque setpoint (V cons) for the engine. The torque produced at at least one wheel is monitored with a comparison of the torque setpoint (V cons) and a delivered torque (CR). When a difference between the delivered torque (CR) and the torque setpoint (V cons) is outside a predetermined variation range defined to ensure automatic control, at least one auxiliary torque (C Prel EA) requested by an auxiliary element is identified, the auxiliary torque (C Prel EA) being taken fromthe engine torque. When the auxiliary torque (C Prel EA) is identified, the auxiliary torque (C Prel EA) is completely or partially offloaded with a sufficient reduction in order to reach the torque setpoint (V cons).

Description

technical field

[0001] The present invention relates to a method of recovering torque for a powertrain comprising a motor vehicle engine by a hold / load shed request during automated driving. The invention also relates to a motor vehicle comprising an automated driving system for carrying out such a method, in particular for the longitudinal movement of the vehicle. The engine may be a thermal engine associated or not with an engine that ensures non-thermal drive. Background technique

[0002] For example, motor vehicles may be equipped with radar or camera systems to enable automatic movement of the vehicle and / or automatic parking systems.

[0003] Such an automatic driving system can control the powertrain in the range corresponding to the minimum and maximum load of the powertrain, for example, the output of the minimum torque corresponds to the driver's foot off the accelerator pedal, and the output of the maximum torque The output corresponds to the full load of the p...

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