Quote:
Originally Posted by mad_sb
Subaru knock control is probably one of the most sophisticated (and annoying) around.
|
Ehh I'd put it in the middle of the pack as far as how "advanced" it is. Some older engines in the market have very very basic knock control, where there's a basic ignition advance and then some reactionary ignition timing retard with some timer logic to restore timing advance.
The most advanced ones I've seen are part of fully torque-based engine control systems (typically German). They actually model the MBT value and base timing calculations off of that. There's also modelling of the engine octane as well. Then there's "ignition efficiency" maps that calculate the effect of retarding the timing on the torque output of the engine which then feeds into the torque arbitration system.