| 摘要 |
<p>An automotive driving device for machines and vehicles, comprising a drive motor (1) with a speed infinitely adjustable by means of a setting element (15), a hydraulic torque converter (29) controlled as a function of the speed of the drive motor and of the operating pressure by a control device (31, 32), a manual gearbox (7) situated downstream of the torque converter (29), and a gear-changing device for the manual gearbox (7) with an electronic control circuit and an actuating element (9) for changing gear, is to be configured in such a way that a comfortable gear-changing behaviour is achieved in a simple manner when changing down to a lower gear. For this purpose, the invention proposes that a gear-changing operation from a higher to a lower gear is only carried out if the following gear-change conditions have been fulfilled:… a) the output speed of the torque converter (29) before the gear-changing operation is below a certain value, which can be set as desired,… b) before the gear-changing operation, the transmission of the torque converter (29) reaches a certain minimum value brought about by the travelling resistance (working pressure), it being possible to set the said value as desired. …<IMAGE>… </p> |
