Control method and control device for a vehicle gearbox

A control method for a vehicle (130;

• 130, 130a, 130b), comprising:
• obtaining, by at least one processing circuit (30), a gearbox actuator position (62) indicative of a position of an actuator member (52, 53;
• 53, 53a, 53b, 53c) of a gearbox actuator (50), wherein the actuator member (52, 53;
• 53, 53a, 53b, 53c) is displaceable to bring a gear (41) of a gearbox (40) into engagement with a mating gear (42) of the gearbox (40);
• processing, by the at least one processing circuit (30), the gearbox actuator position (62) to detect a tooth-on-tooth situation preventing engagement between the gear (41) and the mating gear (42);
• and
• triggering, by the at least one processing circuit (30), a corrective procedure to resolve the tooth-on-tooth situation, the corrective procedure comprising triggering, by the at least one processing circuit (30), a rotational speed pulse (67, 68) or several rotational speed pulses (67, 68) for an input shaft (45) of the gearbox (40) to resolve the tooth-on-tooth situation;
• wherein the rotational speed pulse is defined as a change in rotational speed of the input shaft that is deliberately and controllably introduced by the at least one processing circuit, wherein the rotational speed pulse includes a rising flank in which the rotational speed is increased and a falling flank in which the rotational speed is decreased, wherein the rising flank and the falling flank are matched to each other such that the increase during the rising flank is equal in magnitude to the decrease during the falling flank, such that the rotational speed at an end of the rotational speed pulse is the same as the rotational speed at a start of the rotational speed pulse.