RING 2043120 - Caterpillar

Torque Converter Operation
The oil flow inside the torque converter is from impeller (9) to turbine (7) . The oil then flows to stator (25) . From stator (25) , part of the oil flows back to the impeller and the remainder flows to outlet passage (17) in carrier (18) .The torque converter is operated with pressurized oil. The maximum inlet pressure is controlled by the torque converter inlet relief valve. The outlet pressure is controlled by the outlet relief valve and by restrictions which are downstream.Oil flows through inlet passage (28) in carrier (18) to hub (26) and impeller (9) . The rotation of the impeller gives force to the oil. The impeller sends the oil toward turbine (7) . The force of the oil that is hitting the turbine blades causes the turbine to turn. The turbine turns the output shaft (22) through hub (2) .The oil flows from the turbine in a direction which is opposite to the direction which is required for the impeller. Stator (25) causes the oil to change direction into the impeller. Because the stator is held stationary by carrier (18) , most of the oil is sent back to the impeller. The remainder of the oil flows through outlet passage (17) to the outlet relief valve.The oil from the stator adds to the oil from the inlet passage to the impeller.