Process and device for preventing the engagement of an impermissible speed in an automated gearbox
View Patent ↗A process for preventing the engagement of an impermissible speed in an automated gearbox with a gear-switching member, which can be moved along a gear-selection speed range and out of it into speed step ranges containing the following steps: acquiring the speed step range in which the gear-switching member is moved; acquisition of the momentary vehicle speed; checking as to whether the speed, belonging to the particular speed step range related to the momentary vehicle speed, is permissible; acquisition of the triggering of a gear-switching actuator in case of an impermissible speed; and, triggering of a fault reaction upon the activity of the gear-switching actuator toward the setting of the speed that is recognized as impermissible. A device for implementing the method is also disclosed.
1. A method for preventing engagement of an impermissible speed in an automated gearbox with a gear-switching member that can be moved along a gear-selection speed range and out of said gear-selection speed range into a particular gear-step speed range, selected from a plurality of gear-step speed ranges, comprising the steps of:
(a) acquiring the particular gear-step speed range in which the gear-switching member is moved;
(b) acquiring a momentary vehicle speed;
(c) checking whether the particular gear-step speed range is permissible relative to the momentary vehicle speed;
(d) triggering a gear-switching actuator upon finding the particular gear-step speed range is impermissible; and,
(e) triggering a fault reaction upon the triggering of the gear-switching actuator toward a setting of the plurality of gear-step speed range that is recognized as impermissible.
2. The method according to claim 1 , whereby a particular gear-step speed range is evaluated as impermissible when it is too small relative to the momentary vehicle speed.
3. The method according to claim 1 , wherein the gear-switching actuator is deactivated in case of a faulty reaction.
4. The method according to claim 2 , wherein the gear-switching actuator is deactivated in case of a faulty reaction.
5. The method according to claim 1 , wherein a control device of the gear-switching actuator is reset in case of a fault reaction.
6. The method according to claim 2 , wherein a control device of the gear-switching actuator is reset in case of a fault reaction.
7. The method according to claim 1 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.
8. The method according to claim 2 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.
9. The method according to claim 3 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.
10. The method according to claim 4 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.
11. The method according to claim 5 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.
12. The method according to claim 6 , wherein the triggering of the gear-switching actuator lasts as long as the gear-switching member is in a gear-step speed range of an impermissible speed.