Longitudinal Dynamics Management: Notes

In previous BMW vehicles acceleration control was calculated by different modules (DME, DSC, ACC etc.) in order to activate the corresponding actuators with the relevant control signals. To take control of the increasing system complexity and reduce the number of possible variants that can exist, a new Longitudinal Dynamics Management (LDM) system is installed in the E90 which serves as the primary controller for DCC or ACC operation.

The LDM module records/monitors the requests/inputs received, calculates the corresponding setpoint/threshold values and forwards the information to the various control systems (i.e. DME, EGS, AFS, ACC, DSC, etc.).

The Longitudinal Dynamics Management (LDM) system is an independent control module (1) that is located behind the light switch in the E90.