Method and device for controlling deceleration in a hybrid phase, for a self-driving vehicle and a non-combustion power unit

Abstract

A method for controlling the deceleration of a partially self-driving vehicle comprising a non-combustion power unit supplying torque to an axle assembly or decelerating same by recovering energy from the axle assembly according to a torque setpoint, and a braking system decelerating same according to a deceleration setpoint. This method comprises steps (10-50) in which, in the event of a need to decelerate during a self-driving phase, the torque setpoint is determined as a function of a minimum authorised torque and of constraints until this torque is reached, and the deceleration setpoint is determined as a function of the constraints and from a chosen first instant preceding a second instant at which the minimum authorised torque is reached, so that, between the first and second instants, the deceleration is the result of the recovery of energy and of the braking system.

Description

technical field [0001] The present invention relates to vehicles that are at least partially automated (or autonomous) driven and include a powertrain with at least one non-thermal traction machine. [0002] In the following, when a vehicle can be driven automatically (partially or fully (without driver intervention)) during the automated driving phase or manually (thus subject to driver intervention on the steering wheel and / or pedals) during the manual driving phase , the vehicle is considered to be at least partially automated (or autonomous) driving. Background technique [0003] Certain vehicles include a powertrain (or GMP) that includes at least one non-thermal traction machine (or generator), i.e., arranged to generate the torque that moves the vehicle based on energy stored in an energy storage component and Energy (or torque) is recovered to supply the energy storage component, for example by energy recovery during deceleration phases. Such non-thermal traction m...

AI Technical Summary

Problems solved by technology

[0013] - distribution in the braking system is not performed correctly, which results in a discontinuity in the overall deceleration of the vehicle (in the worst case (eg when the vehicle starts going downhill) this can cause the vehicle to accelerate instead of decelerate ),

[0014] - The brake system is not able to predict the activation of its hydraulic pump during the current regenerative braking, and the hydraulic pressure setpoint is sent with a very fast dynamic overall, which may cause the activation noise of the hydraulic pump

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