Hydraulic Control Unit
| ITEM | DESCRIPTION |
|---|---|
| 1 | Rear right brake outlet port |
| 2 | Front left brake outlet port |
| 3 | Front right brake outlet port |
| 4 | Rear left brake outlet port |
| 5 | Primary circuit inlet port |
| 6 | Secondary circuit inlet port |
| 7 | Hydraulic Control Unit (HCU) |
| 8 | Electrical connector |
| 9 | Anti-lock Brake System (ABS) control module |
The Hydraulic Control Unit (HCU) is an integral part of the Anti-lock Brake System (ABS) control module. The HCU is installed in the front of the engine compartment.
The HCU is a 4 channel unit that modulates the supply of hydraulic pressure to the brakes under the control of the ABS. The primary and secondary outlet ports of the master cylinder are connected to the primary and secondary inlet ports of the HCU. The primary circuit in the HCU supplies hydraulic pressure to 2 separate outlet ports, for 1 front brake and 1 rear brake. The secondary circuit provides hydraulic pressure to 2 separate outlet ports for the other front and rear brakes.
The HCU has 3 brake operating modes:
- Normal braking/Electronic Brake Force Distribution (EBD)
- ABS braking
- Active braking.
Details of these operating modes are given in the 'Braking Control' information.
For additional information, Refer to: BRAKING CONTROL SYSTEM - INGENIUM I4 2.0L PETROL - PHEV