46
Shift matrix, operating modes, mechatronic module
The shift elements (brakes and clutches) are controlled by means
of actuators, pressure control valves and solenoid valve N88 of the
mechatronic module. The parking lock solenoid N486 serves the
electrohydraulic parking brake function.
The separation clutch K0 is a dry plate clutch and is engaged in the
idle state. It is not activated by the mechatronic module, but
rather is actuated via the separation clutch actuator V606 (refer to
page 32).
This means that actuation of the separation clutch is not depend-
ent of the ATF supply system pressure.
In selector position N or P, the internal combustion engine can be
started and the e-machine operated as a generator by closing the
separation clutch K0.
If the operating mode of the vehicle changes from power to coast-
ing while the internal combustion engine is running and the
separation clutch K0 is closed, the hybrid management system
decides situatively whether the separation clutch K0 stays closed
or not. In this case, recuperation can take place while the separa-
tion clutch K0 is closed.
Shift matrix
The shift matrix shows the interaction between the actuators and
shift elements in each of the operating states and gears.
Key:
Clutch closed
Clutch open/closed dependent on operating status
Brake closed
Brake with minimal torque at clutch kiss point
ICE Internal combustion engine
Pressure control valves/solenoid valve
1 Active (energised)
0 Inactive (a low basic control current is always present)
01 = active / inactive dependent on operating status
X Active control current is dependent on operating status
EPC Electric pressure control valve
SV Solenoid valve
Clutches D and E are not required for 1st gear.
If an operating state is selected, the other gears are shifted by
shift elements A, B, C, D and E.
649_085
5th gear
6th gear
7thgear
8th gear
R gear
2nd gear
3rd gear
4th gear
Engage
parking brake
Disengage
parking brake
Hold parking
brake released
Shift elements/magnets/solenoid valves/pressure control valves
Parking lock
function
Operating modes
1st gear
1st gear
1st gear
1st gear
1st gear
4th gear
1st gear
1st gear
Gearbox in selector positions N
and P
Gearbox in P or N: start ICE
with e-machine
Gearbox in P or N: ICE drives
e-machine as generator
Vehicle is running: start ICE
with e-machine
Vehicle is running: start ICE
with starter generator
Electric drive mode
Drive by ICE
Drive by ICE, ICE uses
e-machine as generator
Use of both drive systems for
drive, boost function
Recuperation under braking
and acceleration
Coasting mode
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