METHOD OF DISCHARGE VOLTAGE REDUCTION IN IGNITION SYSTEMS OF INTERNAL COMBUSTION ENGINES Russian patent published in 2009 - IPC F02P1/00 

FIELD: engines and pumps.

SUBSTANCE: invention concerns ignition systems of internal combustion engines with inductive and capacitive energy storage and can be used in ignition systems of internal combustion engines. Method of discharge voltage reduction in ignition systems of internal combustion engines with inductive and capacitive energy storage consists that spark discharge series is enabled before ignition point when the cylinder pressure is lower than it is at the ignition point, and discharge voltage is lower up to the values 8-10 times less during inlet stroke if the cylinder pressure does not exceed the atmospheric pressure. Spark discharge energy is sufficient for discharge gap breakdown. Due to residual ionisation, spark discharge repetition frequency supports the discharge gap breakdown. Breakdown voltage of the next discharge remains lower than maximum permissible for the used ignition system regardless of pressure increase. Spark discharge duration and energy are insufficient for blended fuel ignition. At the ignition point, spark discharge or discharges energy increases to the value sufficient for blended fuel ignition.

EFFECT: electric loss enhancement in ignition system, more reliable performance, improved engine efficiency and capacity.

1 cl, 7 dwg