Torque converter automatic transmission Nissan Pathfinder
The torque converter in the Nissan Pathfinder automatic transmission performs the following functions:
*Transmission of torque from engine to gearbox
* Torque conversion, allowing the car to move smoothly at low speed
* Damping of engine torsional vibrations
Design
The Nissan Pathfinder automatic transmission torque converter consists of the following components:
* Pump wheel: Located on the engine crankshaft and connected to the turbine wheel.
* Turbine wheel: Located on the transmission input shaft and connected to the pump wheel.
* Reactor: Located between the pump and turbine wheels and helps regulate torque.
* Operating circuit: Contains transmission fluid to transfer power between the wheels.
Operating principle
1. Torque from motor: The motor produces torque which is transmitted to the pump wheel.
2. Transmission fluid transition: Transmission fluid circulates in the operating circuit. The pump wheel pushes fluid onto the blades of the turbine wheel.
3. Torque increase: The turbine wheel blades transmit torque to the reactor. The reactor changes the direction of fluid flow, increasing torque.
4. Power Transmission: Increased torque is transmitted to the transmission input shaft to keep the vehicle moving.
Torque converter malfunctions
Common signs of a failing torque converter include:
*Slip: Loss of power when shifting or accelerating.
* Vibration: Vibration in the transmission when driving at low speed.
* Noises: Uncharacteristic noises or humming coming from under the vehicle.
* Transmission fluid leaks: Fluid leaks around the torque converter.
Maintenance and repair
To maintain the performance of the torque converter, it is important to regularly service the automatic transmission, including:
* Replacement of transmission fluid and filter
* Checking the fluid level and adding it if necessary
* Diagnose faults using an OBD-II scanner
If the torque converter malfunctions, it may require repair or replacement. Repair is a complex procedure and requires special knowledge and equipment.