Normal ignition timing: Optimization

A matrix (map, kennfeldt) in the control module memory contains the ignition timing for each respective load and engine speed.

Ignition timing is optimized to obtain the best torque at the current operating point, which also coincides with the best efficiency and therefore best fuel economy.

Normal ignition timing that is the basis for ignition timing control when driving must occasionally be compensated to a slightly more advanced or retarded ignition timing due to other factors than just load and engine speed.