Brake Function Requested By Other Systems

In the Mark 60E brake system, other vehicle control systems can send a request for the brake system to perform certain brake functions.

The forward sensing module (FSM)  regulates a system that uses a forward-aimed radar to detect whether there are any objects within a predefined area in front of the vehicle. If an object is registered, a request is sent to the brake control module (BCM) for automatic braking.

The system comprises two subfunctions: adaptive cruise control (ACC) plus collision warning and collision mitigation by braking.

• Adaptive cruise control  is a function that operates when cruise control is active. It helps the driver check and maintain the distance to the vehicle directly in front. If the radar of the forward sensing module (FSM) detects an object nearing a predefined area at the front of the vehicle, the control module sends a request to the brake control module (BCM) to gently decelerate the vehicle. The function is enabled and disabled via the control for cruise control.
• Collision warning and collision mitigation by braking  is a function that helps the driver obtain maximum braking effect when there is a risk of collision. If the radar of the forward sensing module (FSM) detects that an object in front of the vehicle is within a predefined area, the control module sends a request to the brake control module (BCM) to increase preparedness. The brake control module (BCM) increases brake pressure as a means of preparing to help the driver brake. If collision is unavoidable, the brake control module (BCM) automatically helps the driver obtain maximum brake effect.

The adaptive cruise control and the collision warning and collision mitigation by braking functions are not triggered if there is a fault in the brake control module (BCM) or if the central electronic module (CEM) indicates that there is a fault in one of these functions via the CAN network.

For a more detailed description of the systems, see Design and Function, Forward Sensing Module (FSM).

The park brake module (PBM)  regulates the electrically operated parking brake. If the driver activates the parking brake while driving, a request is sent to the brake control module (BCM) to decelerate the vehicle with the help of the brake function. The brake function remains active as long as the button is depressed, but is disabled at speeds below 5 km/h (3.1 mph) as the electrically operated parking brake function then takes over. The driver can activate or deactivate the parking brake by pressing the button or by pressing the accelerator pedal.

For a more detailed description of the system, see Design and Function, Park Brake Module (PBM).