![]() In that, the impeller or pump acts as the first fan which is connected to the engine and turbine act as the second fan which is connected to the transmission system. On the same principle, the torque converter works. When the second fan is stopped, it does not stop the first one. The air from the first fan strikes on the blades of the second fan and it also starts rotating almost at the same speed to the first one. When the first fan connected to the power source starts moving, the air from it flows to the second fan which is stationary. One fan is connected to the power source and other is not connected with the power source. the lockup eliminates the loses and improves the efficiency of the converter.įor understanding the working principle of the torque converter, let’s take two fans. The lock-up clutch comes into play when the torque converter achieves coupling point. The turbine is also having a lock-up clutch at its back. As the turbine rotates the input shaft of the transmission also rotates and made the vehicle to move. It is the change in the direction of the fluid that forces the blades to move in the direction of the impeller. The blades of the turbine are designed in such a way that it can change the direction of the fluid completely that strikes on its blades. It also consists of curved and angled blades. The turbine is connected to the input shaft of the automatic transmission. And the stator is placed in between the impeller and turbine. The turbine is connected to the transmission system of the vehicle. The stator is mounted with a one-way clutch that allows rotating it in one direction and preventing its rotation in other direction. The stator changes the direction of fluid almost up to 90 degrees. So stator helps in the torque multiplication by changing the direction of the fluid and allows it to enter in the direction of the impeller rotation. As the fluid enters in the direction of the impeller, it multiplies the torque. The main function of the stator is to give direction to the returning fluid from the turbine so that the fluid enters the impeller in the direction of its rotation. The stator is located in between the impeller and turbine. It acts as a centrifugal pump which sucks the fluid from the automatic transmission and delivers it to the turbine. The blades of the impeller are designed in such a way that it directs the fluid towards the turbine blades. When it rotates with the engine, the centrifugal force makes the fluid move outward. It rotates with the engine speed and consists of automatic transmission fluid. The impeller is connected to the housing and the housing connected to the engine shaft. The torque converter has three main parts It multiplies the torque of the engine and transmits it to the transmission. It isolates the engine from the load when the vehicle is stationary.Ĥ. It drives the front pump of the transmission.ģ. It transfers the power from the engine to the transmission input shaft.Ģ. ![]() When you release the brake and step on the gas, the engine speeds up and pumps more fluid into the torque converter, causing more power (torque) to be transmitted to the wheels.ġ. When the engine is idling, such as at a stoplight, the amount of torque going through the torque converter is small but still enough to require some pressure on the brake pedal to stop the car from creeping. Automatic transmissions use a torque converter. Manual transmission cars use a clutch that disconnects the engine from the transmission. As the clutch separates the engine from the load when it stops, in the same way, it also isolates the engine from the load and keeps engine running when a vehicle stops.Ĭars with automatic transmissions don’t have clutches, so they need a way to let the engine keep running while the wheels and gears in the transmission come to a stop. It has the same function as the clutch in manual transmission. It sits in between the engine and transmission. The main function of it is to allow the load to be isolated from the main power source. It takes place of a mechanical clutch in an automatic transmission. A torque converter is a type of fluid coupling which is used to transfer rotating power from the engine of a vehicle to the transmission.
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