Procedure for operating a transmission device

A method of operating a transmission device (1) which can be changed to various operating conditions by actuating shifting elements (A to F), at least one of the shifting elements (A, F) is an interlocking shifting element which, in order to obtain at least one defined operating condition of the transmission device (1), during which a force flow exists between a transmission input shaft (2) and a transmission output shaft (3), has to be changed to an engaged operating condition, the method comprising the steps of:

• when the interlocking shifting element (A, F) has to be engaged, varying either a rotational speed (nt) of the transmission input shaft (2) or a rotational speed equivalent thereto in a direction toward a synchronous rotational speed (nt(“4”)) which is produced in the engaged operating condition of the interlocking shifting element (F) at least as a function of a rotational speed of the transmission output shaft (3), and
• discontinuing engagement of the interlocking shifting element (A, F), if the variation of the rotational speed (nt) of the transmission input shaft (2) or the rotational speed equivalent thereto crosses a predefined rotational speed threshold (ntS1) before reaching the synchronous speed (nt(“4”)) without actuation of the interlocking shifting element (A, F) in an engaging direction having been called for.

A method of operating a 9-gear transmission device (1) which has a plurality of actuating shifting elements, at least one of the actuating shifting elements is an interlocking shifting element which is engaged in a flow of force between a transmission input shaft (2) and a transmission output shaft (3) to implement at least one defined operating condition of the transmission device (1), the method comprising the steps of:

• adjusting a rotational speed (nt) of the transmission input shaft (2) toward a synchronous rotational speed of the interlocking shifting element (A, F) as a function of a rotational speed of the transmission output shaft (3);
• and
• discontinuing engagement of the interlocking shifting element (A, F) if the rotational speed (nt) of the transmission input shaft (2) crosses a predefined rotational speed threshold (ntS1) before reaching the synchronous speed (nt(“4”)) of the interlocking shifting element (A, F) without actuation of the interlocking shifting element (A, F) in an engaging direction being requested.