940 L4-2.3L SOHC VIN 88 B230F (1992)
Planetary Gears: Description and Operation
The principle of a planetary gear train is as follows: Mounted on a central shaft, the sun wheel is surrounded by planet gears mounted on a carrier,
all enclosed in a ring gear (or annulus). In addition to transmitting power from the sun wheel to the ring gear and vice versa, the planets are also
locked under certain conditions. Different speed ratios are obtained by preventing one or other of the three elements from rotating while allowing
the others to turn. The train is disengaged when none of the elements is locked.
The main advantage of the planetary gear train is that it permits gear shifting without declutching, since the gears are in constant engagement.
Planetary Gear Assembly
