Description :

A used torque converter is a key component in automatic transmission systems of vehicles, playing a crucial role in transferring power from the engine to the transmission. It operates on the principles of fluid dynamics and consists of three main parts: the used impeller, the used turbine, and the used stator.

1. *Impeller (Pump):*
- Connected to the engine crankshaft, the used impeller is responsible for pumping and circulating transmission fluid throughout the torque converter.
2. *Turbine (Runner):*
- Linked to the transmission input shaft, the used turbine is situated opposite the impeller. As transmission fluid circulates from the impeller to the turbine, it causes the turbine to spin.
3. *Stator:*
- Positioned between the used impeller and the used turbine, the stator's primary function is to redirect the fluid flow, optimizing the efficiency of torque conversion.
The torque converter functions as follows:
- *Fluid Coupling:*
- When the engine is running, the used impeller spins, creating a flow of transmission fluid. This fluid flow engages the used turbine, causing it to rotate. In the absence of a direct mechanical connection, this phase is known as fluid coupling.
- *Torque Multiplication:*
- One of the notable features of a used torque converter is its ability to multiply torque. During acceleration, the torque converter amplifies the engine's torque output before transmitting it to the transmission. This is particularly beneficial during low-speed driving or when starting from a complete stop.
- *Stall Speed:*
- The stall speed is the minimum engine speed at which the used torque converter can transmit enough power to prevent stalling when the vehicle is stationary. This is important for smooth take-offs and idling.
- *Lockup Clutch:*
- In modern used torque converters, there is often a lockup clutch that mechanically connects the used impeller and used turbine at higher speeds. This reduces slippage and increases efficiency, improving fuel economy.
Used torque converters contribute to the smooth operation of an automatic transmission, allowing the vehicle to shift gears seamlessly and providing the necessary torque for various driving conditions. While older designs may have experienced efficiency losses due to fluid slippage, modern used torque converters are equipped with advanced features to enhance performance and fuel efficiency.