Limitation of engine torque, 2x: Misfiring

To protect the turbo unit and the catalytic converter if misfiring should occur, the engine torque will be limited when there is a risk of overheating. The degree of misfiring that is allowed without engine torque limitation depends on the current operating point, engine speed and load.

Fig 1: Engine Torque Graph (Misfiring)

Courtesy of SAAB-SCANIA OF AMERICA, INC.