Function of Power Flow In 4TH Gear

PRINCIPLE OF POWER TRANSMISSION IN 4TH GEAR
- No torque/speed conversion takes place due to the direct ratio of 4th gear (i=1). Power is transmitted from the input shaft (1) to the output shaft (5) via three locked planetary gear sets.

FRONT PLANETARY GEAR SET
- The planet carrier (V3) and sun gear (V1) are rigidly connected to each other via the engaged multiple-disc clutch K1. The planetary gear set is therefore locked and rotates as a closed unit at the input speed due to the mechanical connection between the internally-geared wheel (V41 and the input shaft (1).

REAR PLANETARY GEAR SET
- The multiple-disc clutch K2 is engaged and transmits the input speed of the input shaft (1) to the planet carrier (H3) via the internally-geared wheel (M4). The internally-geared wheel (H4) rotates in the same way as the planet carrier (H3) via the mechanical connection to the locked front planetary gear set. The planetary-gear set is therefore locked and rotates as a closed unit.

CENTER PLANETARY GEAR SET
- The internally-geared wheel (M4) rotates at input speed due the engaged multiple-disc clutch K2. The multiple-disc clutch K3 connects the sun gears (M1) and (H1) of the rear and center planetary gear set. The planetary gear set is locked due to the equal speeds of the internally-geared wheel (M4) and sun gear (M1) and rotates as a closed unit

Also Refer To
- Torque Converter. Torque Converter
- Planetary Gear Set. Function of Planetary Gear Set
- Multiple-disc Clutch. Multiple Disc Clutch


SURVEY OF TRANSMISSION RATIOS WITH SHIFT ELEMENTS OPERATED