Ignition system for internal combustion engines

Patent · Tue Nov 30 04:00:00 EST 1982

OSTI ID:6500174

Hachiga, T; Iyoda, M; Sugie, O

A contactless ignition system for internal combustion engines of the type including an ignition coil with two primary windings whose primary currents are alternately switched on and off by two power transistors, further includes two zener diodes each having a breakdown voltage of 300 to 400 volts and connected in series with one of the power transistors and one of the ignition coil primary windings to function as a reverse current blocking diode. By virtue of two series circuits each including the zener diode, a diode connected in inverse parallel with one of the power transistors and the primary winding, each of the zener diodes serves both the reverse current blocking function and the overvoltage protection function. The zener diodes may be replaced with diodes of the avalance type.

• Assignee: Nippondenso Co Ltd (Japan)
• Patent Number(s): US 4361129
• OSTI ID: 6500174
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
DC SYSTEMS
ELECTRONIC CIRCUITS
ENERGY SYSTEMS
ENGINES
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
JUNCTION DIODES
OVERVOLTAGE
POWER SYSTEMS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
TRANSISTORS