Additional functions of the KSUD (BMW X5 E53)

Additional functions of the N62 KSUD are: self-diagnostics; control of the maximum permissible engine crankshaft speed; canister purge control; turning on the fuel pump and heating the oxygen sensor in the exhaust gas; battery voltage control; communication with other systems such as ABS, DTC, DSC, ride height control, rain sensor, battery, automatic transmission.

Fuel vapors cannot leave the fuel tank without passing through the adsorber. The electromagnetic valve of the fuel tank ventilation is controlled depending on the engine condition. Gasoline vapors formed in the fuel tank accumulate in the adsorber and are fed through the electromagnetic valve through the inlet channel into the combustion chamber and burned. The adsorber purge valve operates cyclically and is controlled by the ECU-KSUD depending on the engine operating mode. While the valve is under voltage (more than 10 V), the pipeline leading to the intake manifold is closed. When the voltage is removed from the valve, it can open under the influence of the vacuum in the intake manifold.

For communication with other control units, the ECU-KSUD has a special data bus for exchanging information between systems. Such a bus ensures high efficiency and a high level of protection for the vehicle in the event of failure of individual devices, and also reduces the number of conductors in the cable harness.