公开(公告)号：US20220170455A1

公开(公告)日：2022-06-02

申请号：US17432309

申请日：2020-01-28

Applicant: RENAULT s.a.s.

Inventor： Mathieu LELEU

IPC: F04B49/02 ,  F16H57/04 ,  F04B17/03 ,  F04B49/06 ,  F04B49/20

Abstract: A method controls the start-up of an oil pump of a gearbox by a brushless electric motor that has no position sensor. The stator coils are powered from the off mode in a constant-current open-loop control sequence until the pump reaches a speed threshold at which speed regulation switches over to closed-loop control on a setpoint corresponding to the lubrication flow rate required to ensure the reliability of the gearbox, but without in so doing exceeding a current threshold indicative of pump seizure, at which point motor control switches back over to the constant-current open-loop control sequence. The open-loop current setpoint is higher than the threshold for switching over to closed-loop control so that in the open-loop control mode the motor torque available at the pump is higher than in the closed-loop control mode.