CAMBIO E DISPOSITIVO DI AZIONAMENTO DEL CAMBIO, IN PARTICOLARE PER UNA AUTOMATIZZAZIONE DELLA VARIAZIONE DEL RAPPORTO DI TRASMISSIONE

摘要

An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction ratio and an efficient use of limited space.