Emergency Brake Assist

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. 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 increasing the applied braking effort. The anti-lock brake system (ABS) module invokes emergency brake assist (EBA) when:

The brake pedal is rapidly pressed.
The brake pedal is pressed hard enough to bring the front brakes into anti-lock brake system (ABS) operation.

When the brake pedal is rapidly pressed, the anti-lock brake system (ABS) module increases the hydraulic pressure to all of the brakes until the threshold for anti-lock brake system (ABS) operation is reached. This action applies the maximum braking effort for the available traction. The anti-lock brake system (ABS) module monitors for the sudden application of the brakes, using inputs from the brake pedal switch and from the pressure sensor within 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, sufficiently 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.