Ignition system for internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 22, 2003
Grant Date -
N/A
app pub date -
May 25, 2001
filing date -
May 26, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A main IGBT conducts or blocks a primary current flowing through the ignition coil in response to an input ignition control signal to generate a high voltage on the secondary side of the ignition coil. The main IGBT and a current limiter circuit are integrated in a monolithic silicon substrate of an insulating gate bipolar power transistor. The main IGBT has a collector and agate connected through a depletion IGBT forming part of a constant current circuit, and a resistor. When a voltage generated across the resistor becomes equal to or higher than a zener voltage, a zener diode leads this current to an emitter of the main IGBT.
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