Honda automatic transmission friction discs
Friction discs are an important component of the automatic transmission (AT) of Honda vehicles. They are responsible for transmitting torque from the drive shaft to the driven shaft in the gearbox.
Design
Honda friction discs consist of two steel plates with friction material between them. Friction material is usually made from cellulose fibers, resin and other additives.
Operating principle
When the transmission is in Drive, transmission fluid is pressurized into a piston that presses the friction discs together. When the discs engage, they transmit torque from the drive shaft to the driven shaft. When the driver changes gear, hydraulic pressure is adjusted and the friction discs open to change the gear ratio.
Types of friction discs
Honda uses several types of friction discs in its automatic transmissions, including:
* Direct Acting Discs: Originally used in early Honda automatic transmissions, they transfer torque directly from the drive shaft to the driven shaft.
* Servo Driven Discs: These have a servo piston built into the disc which helps apply additional pressure to increase the torque transmitted.
*Friction Belt Discs: Equipped with a friction belt that wraps around the driven shaft to transmit torque.
Malfunctions and maintenance
Friction discs can wear out over time due to friction and heat, causing slippage and reduced transmission efficiency. Regular maintenance, including changing the transmission fluid and filter, can help extend the life of your friction discs. If worn or damaged, the friction discs must be replaced to ensure proper operation of the automatic transmission.