Method and system of estimating MBT timing using in-cylinder...

Details Method and system of estimating MBT timing using in-cylinder... Method and system of estimating MBT timing using in-cylinder...

2007-11-06

2007-11-06

McCall, Eric S. (Department: 2855)

Measuring and testing

Vehicle chassis

Steering

C073S035080

Reexamination Certificate

active

10926110

ABSTRACT:
A robust multi-criteria minimum timing for the best torque (MBT) timing estimation method and apparatus utilizes different ionization signal waveforms that are generated under different engine operating conditions. The MBT timing criteria is calculated based upon both ionization and analog derivative ionization. Multiple MBT timing criteria are determined and combined to increase the reliability and robustness of MBT timing estimation based upon spark plug ionization signal waveforms. In a preferred embodiment, a combination of the MBT timing estimation criteria comprises a maximum flame acceleration location, a 50% burn location, and a second peak location.

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