Maximum brake torque
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There is always an optimal spark timing for all operating conditions of an engine. MBT is most ideal at wide-open throttle (WOT), but not desirable when the engine is at idle. Although MBT is desired at WOT, it is wise to retard timing slightly to prevent knocking that may occur and to create a small safety margin. It is possible to calculate the MBT of an engine by taking into account all of the operating conditions of an engine through its sensors. Operating conditions are defined by these engine parameters: lambda, engine load, internal exhaust gas recirculation, engine speed, and spark advance.
- An Investigation of Maximum Brake Torque Timing based on Ionization Current Feedback
- Engine Management Advanced Tuning. by Greg Banish and CarTech Books. 2007