| 摘要 |
A safety system in a clutch management system CMS for an automatic clutch is designed to take over control of the clutch management system if the electronic main control unit ECU (6) does not execute the control logic, when ECU (6) loses voltage, and when ECU (6) itself detects that it is no longer in control of the control current to a main valve (4) in CMS. In this case a backup control unit ECU (13), which is connected to ECU (6) and normally is operated continuously and parallel thereto, takes over control of the position of the hydraulic actuator (5) which regulates the torque which is transferred by the clutch. The backup control unit ECU (13) is implemented in the form of a continuously running state machine SM with e.g. six states, each comprising an operational part and a decision part. In a method for control of the clutch management system CMS, the information which is detected and processed in the safety system even in an error situation is sufficient to give the driver control over the vehicle in which the clutch management system CMS is installed. |
