EAS II - (Code GE2), control circuit 29.10.2003 The GS sensor unit (A15) provides the preselected gear in the form of a confirmation to the FR control unit (A3). Vehicle-specific data are processed in the drive control (FR) software module in the FR control unit (A3). All the shift-related data are recorded and processed in the automatic gear selection (AG) software module, tasked with the ongoing calculation of possible target gears which correspond to the shift strategy. The clutch control (KR) records and processes all the data relating to the clutch control. The clutch operation (KB) in the GS II control unit (A16) converts these entries accordingly.
The gear control (GS) and clutch operation (KB) software modules convert the commands in the GS control unit (A16) accordingly and control the correct solenoid valves to open and close the clutch and shift the targeted gear. The controlled system consists of the clutch and the transmission. The GS control unit compares the specified values (learned values) with the actual conditions and actual values. The actual values represent the actual clutch and transmission operating conditions that are recorded via the different indicators and sensors.
In the event that the comparison shows a difference between the actual values and the learned values, a shift abort might be introduced, for example, depending on the situation, or a corresponding event message displayed on the driver information system (FIS). The learned values are entered in the GS II system during the "minor" and "major" teach-in processes. The response of the clutch operation is affected by the clutch characteristics in the FR control unit (A3).
The Telligent automatic transmisssion II control circuit consists of the system being controlled (transmission, clutch) and the FR control unit (A3), comprising automatic gear selection (AG software modules) and clutch control (KR software modules) based on the gear control (GS) and clutch operation (KB) (both software modules in the GSII control unit, A16). TR EAS II - (Code GE2), control circuit 25 This information regarding the targeted gear to be shifted and regarding the clutch control is relayed to the GS control unit (A16) via the transmission CAN. The entries for the targeted gear cannot be overwritten by the gear control II (A16).
The gear control can only refuse to perform a gearshift in emergency situations (changed conditions suddenly brought about by influencing factors). The basic functions and gear change sequences of the Telligent automatic transmission II can be represented as a simple control circuit. If a gear change is to be completed in drive status, the gear to be shifted (targeted gear) is determined on the basis of several variables. 10/03 Trucks • Transmission Telligent automatic transmission in ACTROS and ATEGO > Specialist training