The connection between the brakes and the automatic transmission is that the automatic transmission uses brake fluid to control the internal clutches and gear changes.
Here’s how it works:
*Hydraulic control unit: The automatic transmission has a hydraulic control unit that distributes brake fluid to the various clutches and pistons inside the transmission.
* Brake fluid pressure: When the driver presses the brake pedal, the brake master cylinder creates pressure in the hydraulic system, which includes the automatic transmission.
* Clutch Control: Increasing brake fluid pressure causes the pistons in the hydraulic control unit to press the clutches against each other, transmitting torque to the wheels.
* Gear shifting: Various proportions and distribution of brake fluid pressure are used to engage and disengage the clutches, allowing the gearbox ratio to be varied.
* Parking mode: When the vehicle is in parking mode, the transmission locks the shaft to prevent the vehicle from moving using a clutch that is activated by brake fluid pressure.
Thus, brake fluid plays an important role in the operation of the automatic transmission, providing torque transmission, gear shifting and activating the parking function.