GF27.10-P-3032GQH Power Flow In Virtual Operating Mode 1 Function
GF27.10-P-3032GQH Power flow in virtual operating mode 1 function
- Transmission 722.550
Function requirements for power flow in virtual operating mode 1, general
^ Circuit 87 (connected circuit 15) ON
^ Electric machines 1 and 2 ON
^ Combustion engine running (hybrid operation)
^ Combustion engine OFF (electric operation)
Power flow in virtual operating mode 1, general
The virtual operating mode 1 is used at a lower vehicle speed range. The combustion engine runs (hybrid drive) or is off (electric drive).
The following multidisk brake is engaged:
- Multidisk brake B1 (13)
Electric machine 1 operates mainly as a generator, electric machine 2 operates mainly as a motor.
Power flow in virtual operating mode 1 (hybrid operation)
During hybrid operation in virtual operating mode 1, the vehicle is driven by electric machine 2 and the combustion engine. The electrical motor 1 operates depending on various factors (such as charge level and temperature of the high-voltage battery (A100g1) either as a generator or as a motor supporting the drive.
The power flow in virtual operating mode 1 flows through the following gear sets during hybrid operation:
^ Front single planetary gear set
^ Center single planetary gear set
^ Rear single planetary gear set
Front single planetary gear set
The ring gear (10) is driven by the transmission input shaft (A). The planetary gears (4) roll on the sun gear (1). This results in increased torque and reduced rpm, which is transferred to the planet carrier (7). In this operating mode, electric machine 1 is mainly driven as a generator.
Center single planetary gear set
The ring gear (11) and the sun gear (1) rotate at the same speed due to the mechanical connection. The planetary gears (5) roll over the stalled sun gear (2) and transmit the rotary motion to the sun gear (3). In this operating mode, electric machine 2 operates mainly as a motor.
Rear single planetary gear set
The planetary gears (6) roll on the stalled ring gear (12) and transfer the increased torque and reduced rotational speed to the transmission output shaft (B) via the planet carrier (9).
The transmission output shaft (B) then rotates with reduced transmission input speed in the engine's direction of rotation.
Power flow in virtual operating mode 1 (electric operation)
During electric operation in virtual operating mode 1, the vehicle is only driven by electric machine 2. The combustion engine is off. This operating condition only occurs if the torque request is low and depending on various factors (sufficient charge level of high voltage battery, temperature of high-voltage battery).
The power flow in virtual operating mode 1 flows through the following gear sets during electric operation:
^ Rear single planetary gear set
Rear single planetary gear set
The ring gear (12) is stalled by the multidisk brake B1 (B). Electric machine 2 drives the sun gear (3). The sun gear (3) transfers the rotational speed to the planetary gears (6).
The resulting increased torque and reduced rotational speed are transmitted via the planet carrier (6) to the transmission output shaft (B).
The transmission output shaft (B) thus turns, in proportion to the input speed of electric machine 2, in the direction of engine rotation at a reduced rpm.
ENGINE START
When the combustion engine is started the electric machines 1 and 2 transfer the torque to the transmission input shaft (A).
ENGINE STOP
When the combustion engine is stopped electric machine 1 transfers the braking torque to the transmission input shaft (A).
Electric machine 1 induces a torque to be transferred to the front and middle single planetary gear set.
Depending on the following factors, electric machine 2 alters the output torque:
- the charge level and temperature of the high voltage battery
- the temperature of electrical machines 1 and 2
- Combustion engine coolant temperature
- Transmission oil temperature
- Position of accelerator pedal
Additional information on the individual driving states of the automatic transmission can be found in the following documents:
^ Hybrid drive system test conditions, function