System Operation: EBA

WARNING: This page is about a different car, the 2013 Land Rover LR4, 2012 Land Rover LR4, 2011 Land Rover LR4, and 2010 Land Rover LR4. However, it is still accessible from the selected car via links, so may be relevant.

Emergency brake assist (EBA) assists the driver, in emergency braking situations, by automatically maximizing the braking effort. There are two situations when the anti-lock brake system (ABS) module will invoke emergency brake assist (EBA): when the brake pedal is pressed very suddenly and when the brake pedal is pressed hard enough to bring the front brakes into anti-lock brake system (ABS) operation.

When the brake pedal is pressed very suddenly, the anti-lock brake system (ABS) module increases the hydraulic pressure to all of the brakes until they reach the threshold for anti-lock brake system (ABS) operation, thus applying the maximum braking effort for the available traction. The anti-lock brake system (ABS) module monitors for the sudden application of the brakes using the inputs from the stoplamp switch and from the pressure sensor in the hydraulic control unit (HCU). With the brake pedal pressed, if the rate of increase of hydraulic pressure exceeds the predetermined limit, the anti-lock brake system (ABS) module invokes emergency braking.

When the brake pedal is pressed hard enough to bring the front brakes into anti-lock brake system (ABS) operation, the anti-lock brake system (ABS) module increases the hydraulic pressure to the rear brakes up to the anti-lock brake system (ABS) threshold.

Emergency brake assist (EBA) operation continues until the driver releases the brake pedal enough for the hydraulic pressure in the hydraulic control unit (HCU) to drop below a threshold value stored in the anti-lock brake system (ABS) module.