Electronic Park Brake (ERB) Actuators
| ITEM | DESCRIPTION |
|---|---|
| 1 | Brake caliper |
| 2 | Spindle |
| 3 | Seal |
| 4 | Electronic Park Brake (EPB) actuator |
| 5 | Screws |
| 6 | Output shaft |
The EPB actuators are electro-mechanical positioning units attached to the calipers of the rear brakes. Each actuator incorporates a reversible electric motor driving an output shaft through a worm drive gear.
The output shaft of the EPB actuator is engaged in the splined end of a spindle which is inside the caliper piston and screwed into a ball screw drive. Operation of the electric motor turns the spindle and produces linear movement of the ball screw drive which applies a target clamp load to the brake pads.