Brake Fluid Pressure Sensor/Switch: Description and Operation

PRESSURE SENSORS

Application

^ Sense the driver's braking intentions (braking while an ESC intervention is in progress)
^ Control the precharging pressure

Design

The sensor consists of two ceramic disks, one of which is stationary and the other movable. The distance between these disks changes when pressure is applied.

Function

^ The pressure sensors operate on the principle of changing capacitance (a).
^ The distance (s) between the disks and, thus, the capacitance changes when pressure is applied to the movable disk by a braking intervention.
^ The fluid displacement of the sensor is negligible.
^ Max. measurable pressure : 170 bar

Guaranteed by redundant installation

Installation location

The sensors are mounted on the TMC (primary and secondary circuits).





1. Specification





2. Output voltage





3. Circuit Diagram