The 6 forward gears and the reverse gear are generated by a double planetary gear set (Ravigneaux) and a front-mounted simple planetary gear.
The way these planetary gear-sets work together, is patented (Lepelletier).
Also new: The stationary disconnect feature, what means that the gearbox is disconnected from the power train at standstill (clutch A is open).
This causes an additional reduction of fuel consumption.
Former the torque converter ran against the motor (foot on the brake) at standstill.
The 6HP26 uses the new “ASIS” shift strategy developed by ZF (Adaptive Shift Strategy).
1. Torque converter 2. Oil pump 3. Front single flanetary gear 4. Clutch 5. Brake 6. Front double flanetary gear 7. Parking lock wheel | 8. Output flange 9. Parking lock pawl 10. Drain plug 11. Pressure regulator 13. Mechatronik(V/Body+TCU) 14. Oil strainer 15. Oil pan |
Shift position | Solenoids | Clutch | Brake | ||||||||||
MV1 | P-EDS | ||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | A | B | E | LC | C | D | ||
P (Parking) | ○ | ○ | ○ | ||||||||||
R (Reverse) | ○ | ○ | ○ | ||||||||||
N (Neutral) | ○ | ○ | ○ | ||||||||||
D 1st | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
D 2nd | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ||||
D 3rd | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
D 4th | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |||||
D 5th | ○ | ○ | ○ | ○ | ○ | ○ | |||||||
D 6th | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |||||
*MV1 : EDS4 Switching function (OFF: Clutch-E, ON: Brake-D)
*LC : Lock-up clutch
Mechatronik consists of the hydraulic valve body assembly and the TCU module.
There are the TCU, two speed sensors, position sensor(inhibitor switch), oil temperature sensor on the E-module.
P | Z1 | R | Z2 | N | Z3 | D | |
L1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
L2 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
L3 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
L4 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
Key to sensor coding:
Logical 0 means transistor block, electric high
Logical 1 means transistor pass, electric low
X means this wire is needed
Z means intermediate position
Conversion of linear shift valve or parking lock movement into a parallel coded signal on 4 wires (L1, L2, L3, L4) in accordance with the positions P, R, N, D, 4, 3, 2 and P_on and P_off (parking lock engaged/disengaged)
The two speed sensors for turbine and output speeds and the oil temperature sensor and position switch are integrated into the TCU module and are not detachable.
The solenoid valves and pressure regulators are attached by the knife-edge clamping technique.
