Audi Q7 e-tron quattro 4M - Page 50

50
Hybrid drive mode: Use of both drive systems for drive, boost function
The gearbox schematic shows the power flow in 1st gear when using
both drive systems for drive. The separation clutch K0 is closed.
The other gears are shifted by activating the shift elements as
described in the shift matrix on page 46.
649_094
Crankshaft of internal combustion engine Output shaft for primary drive
1st gear
Starting of the internal combustion engine via drag starting, slip starting or comfort starting
Depending on the driver's power requirements, the internal com-
bustion engine is started after selecting selector position S
1)
, the
Audidriveselect modedynamic
1)
or by the hybrid management
system in dependence on the charge level of the hybrid battery
(refer to page 9 of SSP650).
The driver's power requirements are indicated to the system via the
active accelerator pedal (refer to page 18).
Based on an engine speed of 0 rpm, the e-machine starts the
internal combustion engine by drag starting after the separation
clutch K0 has closed (n
engine
= 0; n
e-machine
= 0).
To start the internal combustion engine neutrally by slip starting,
the torque generated by the e-machine is increased by the amount
of torque required for starting after the separation clutch K0
closes. The internal combustion engine is brought up to an ignit-
able speed and fired. If the rpm levels of the internal combustion
engine and e-machine are in sync, the separation clutch K0 is
completely closed.
For comfort starting, the internal combustion engine is dragged
up to the speed of the e-machine by the separation clutch K0 and is
not fired until the separation clutch K0 has closed completely. The
basic choice of starting option is dependent on the driver's power
requirements and on the speed conditions.
649_091
Crankshaft of internal combustion engine Output shaft for primary drive
Vehicle stationary
3.0l V6 TDI models are equipped with a starter generator. Under
given conditions, the internal combustion engine is started by the
starter generator.
Starting of the internal combustion engine via the starter generatorC29 (12-volt starting)
Starting with starter generator C29 is also referred to as 12-volt
starting. During 12-volt starting, the separation clutch K0 is open.
For more information, please refer to page 19.
Torque curve/power flow
Stationary parts (locked by brake(s))
Brake applied, braked parts (non-locked)
Rotating parts which do not contribute to
power flow
Planetary gear set in blocking mode and/or blocked
Controlled converter lockup clutch
Brake A closed
Brake B closed
Key:
RS1 (2, 3, 4) Planetary gear set 1 (2, 3, 4)
PT1 (2, 3, 4) Planetary gear carrier 1 (2, 3, 4)
S1 (2, 3, 4) Sun gear of planetary gear set 1 (2, 3, 4)
P1 (2, 3, 4) Planet gears of planetary gear set 1 (2,3,4)
H1 (2, 3, 4) Ring gear of planetary gear set 1 (2, 3, 4)
TD Torsion damper
EM E-machine
(electric drive motor V141)
A, B Multi-disc brakes
C, D, E Multi-disc brakes
CLC Converter lockup clutch
K0 Separation clutch
1)
Provided that the driver is wearing a seat belt, and the doors and
bonnet are closed.
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