Title:
METHOD FOR RESONANT FREQUENCY DETECTION IN CORONA IGNITION SYSTEMS
Document Type and Number:
Japanese Patent JP2019178681
Kind Code:
A
Abstract:
To provide a system and method for detecting a resonant frequency of a corona igniter concurrent with operation of the corona igniter.SOLUTION: The method includes providing a plurality of pulses of energy to the corona igniter, where the pulses have respective pulse durations and are spaced by deadtime durations during which no energy is provided to the corona igniter. Each pulse duration is ceased before current flowing in the corona igniter crosses zero, and each zero crossing of the current occurs during one of the deadtime durations. The next pulse of energy is provided to the corona igniter in response to the zero crossing of the current. A resonant frequency value is then obtained based on the sum of the pulse and deadtime durations of two consecutive cycles, or the time between zero crossings. The resonant frequency values become more accurate over time, and the drive frequency is adjusted accordingly.SELECTED DRAWING: Figure 1
Inventors:
JOHN ANTONY BURROWS
Application Number:
JP2019079540A
Publication Date:
October 17, 2019
Filing Date:
April 18, 2019
Export Citation:
Assignee:
FED MOGUL IGNITION LLC
International Classes:
F02P3/01; H02M7/48; H05H1/24
Attorney, Agent or Firm:
Fukami patent office