Device and method for shifting into reverse for a controlled manual gearbox

摘要

The gearbox has an operating unit formed of a control unit and an actuator, and operating a clutch fork (50) of a jaw clutching sleeve (40). The sleeve is moved from a neutral position, in which a reverse gear (20) is free to rotate with respect to a reverse idler shaft (24), to a clutch position, in which the sleeve integrates the gear and the shaft. The unit replaces a reverse synchronizer and prevents the passage of the sleeve into the clutch position blocking the reverse of the gearbox, while a speed difference between the sleeve and the gear is greater than a preset threshold. An independent claim is also included for a method for shifting a reverse gear of a gearbox.