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Ignition Angle Requested🔗

The Ignition Angle Request sent to the Ignition Target Demand Module, expressed as a number of degrees before top dead center (BTDC). Depending on engine state, this will be based on one of the following:

  • Cranking. The angle obtained from the Cranking Ignition Angle table
  • Idle. The angle obtained from the Idle Ignition Angle table, corrected by adding the Idle Proportional Term from the Idle Control Demands module.
  • Running. The angle obtained from the Base Ignition Angle Tables, with ECT and IAT corrections added in.

The final value is checked against the specified Ignition Angle Maximum Limit and Ignition Angle Minimum Limit (and adjusted if necessary).

Note

This requested value is sent to the Ignition Target Demand module to determine the final demanded ignition timing for each cylinder.