Verfahren und System zum Einlegen eines Ganges

Details

Veröffentlichungs-Nr.

EP3647631

Aktenzeichen

EP18203538

Anmeldetag

30. Oktober 2018

Veröffentlichung

16. Juni 2021

Erteilung

16. Juni 2021

Rechtsraum

EP

IPC

F16H61/04

Abstract

The present disclosure relates to a method for motion control of a shift sleeve in a stepped gear transmission during a synchronization and gear engagement sequence for avoiding gear teeth interference, wherein the stepped gear transmission comprises an axially displaceable shift sleeve arranged on and rotationally secured to a shaft, and a constant mesh gear wheel arranged on and rotatable relative to said shaft, the method comprising:receiving a gear shift command,determining a target relative displacement (y*_sg) between the sleeve teeth (22) and gear teeth (24) for a state when a gear wheel rotational speed (ω_g) reaches a shift sleeve rotational speed (ω_s) at an end of the synchronisation phase, which target relative displacement (y*_sg) is determined for avoiding impact between sleeve teeth and gear teeth during a following gear engagement phase,determining a first phase plane trajectory (y_sg1) defining a relationship between a rotational speed difference (ω_sg) between the shift sleeve and the gear wheel and a relative displacement (y_sg) between the sleeve teeth and gear teeth, wherein the relative displacement (y_sg) according to the first phase plane trajectory (y_sg1) equals the target relative displacement (y*_sg) when said rotational speed difference (ω_sg) becomes zero at the end of the synchronisation phase,determining a second phase plane trajectory (y_sg2) defining the relationship between the rotational speed difference (ω_sg) between the shift sleeve and the gear wheel and the relative displacement (y_sg) between the sleeve teeth and gear teeth, wherein the relative displacement (y_sg) according to the second phase plane trajectory (y_sg2) equals the target relative displacement (y*_sg) when said rotational speed difference (ω_sg) becomes zero at the end of the synchronisation phase,applying a synchronisation torque (T_synch), andcontrolling said synchronisation torque (T_synch) for keeping the real relative displacement (y_sgr) between the sleeve teeth (22) and gear teeth (24) within the boundaries of the first and second phase plane trajectories (y_sg1, y_sg2) for any rotational speed difference (ω_sg), such that the real relative displacement (y_sgr) between the sleeve teeth (22) and gear teeth (24) reaches said target relative displacement (y*_sg) simultaneously with said rotational speed difference (ω_sg) becomes zero at the end of the synchronisation phase.The present disclosure also relates to a corresponding control system.

Anmelder

Firma

Ningbo Geely Automobile Research & Development Co. Ltd.

Land

🇨🇳 China

Fachgebiete