1.3.6 Misfire detection by luts-method (%DMDLU)

The corrected engine roughness lutsk is compared to a load and speed dependant threshold lurs. If the threshold is exceeded, misfire is detected. An example of continuous misfire in cylinder one is shown in Fig 2.

Fig 1: Correct Engine Roughness Lutsk Method Diagram

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Identifying Signal Waveform

Courtesy of BMW OF NORTH AMERICA, INC.