US 11,988,184 B2
Engine ignition system with multiple ignition events
Duried F. Rabban, Henderson, NV (US); and Bradley J. Roche, Millington, MI (US)
Assigned to Walbro LLC, Cass City, MI (US)
Appl. No. 17/606,880
Filed by Walbro LLC, Cass City, MI (US)
PCT Filed Apr. 24, 2020, PCT No. PCT/US2020/029770
§ 371(c)(1), (2) Date Oct. 27, 2021,
PCT Pub. No. WO2020/226910, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/842,871, filed on May 3, 2019.
Prior Publication US 2022/0213859 A1, Jul. 7, 2022
Int. Cl. F02P 7/07 (2006.01); F02P 15/08 (2006.01); F02P 3/04 (2006.01)
CPC F02P 7/07 (2013.01) [F02P 15/08 (2013.01); F02P 3/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of controlling spark events in a combustion engine, comprising:
determining a change in voltage at an input of a sensor during an engine revolution caused by movement of a magnet relative to the sensor; and
providing at least two spark event signals to attempt to provide at least two spark events in the engine for a single time that the magnet moves past the sensor during the engine revolution, wherein:
a) a voltage induced by movement of the magnet relative to and at the input of the sensor is either positive more than once or negative more than once each time that the magnet moves past the sensor and the spark event signals are provided on at least two occasions when the voltage becomes positive or at least two times the voltage becomes negative in a single time that the magnet moves past the sensor in a given engine revolution; or
b) wherein, for the single time that the magnet moves past the sensor, the change in voltage is a transition from zero volts or a negative voltage to a positive value, or a transition from zero volts or a positive voltage to a negative voltage, or a transition from an increasing voltage to a decreasing voltage, and wherein the at least two spark event signals are each provided at a different one of at said transitions for the single time that the magnet moves past the sensor within the engine revolution.