Shift Phase - 2-1 Shift Phase 1
WARNING: This page is about a different variant/trim than selected.
| 1 - 1-2/4-5 SHIFT SOLENOID |
| 5 - 1-2/4-5 COMMAND VALVE |
| 2 - 1-2/4-5 OVERLAP VALVE |
| 6 - DRIVING CLUTCH K1 |
| 3 - 1-2/4-5 SHIFT PRESSURE SHIFT VALVE |
| 7 - HOLDING CLUTCH B1 |
| 4 - 1-2/4-5 HOLDING PRESSURE SHIFT VALVE |
| 8 - SHIFT PRESSURE REGULATING VALVE |
The 1-2/4-5 shift solenoid (1) is turned ON to apply shift pressure (p-S) to the end face of the 1-2/4-5 command valve (5). This allows the command valve to up-shift and the shift pressure coming from the 1-2/4-5 shift valve (3) is routed to the holding clutch B1 (7) via the command valve.
Simultaneously, the pressure in the releasing clutch, K1 (6), is regulated at the 1-2/4-5 overlap valve (2). The pressure in the K1 clutch as it disengages is controlled during the shift phase depending on engine load, via the modulating pressure (p-MOD), and the shift pressure in clutch B1 (7). The increasing shift pressure in clutch B1, which also acts on the end face of the overlap valve, reduces the overlap pressure.