Solenoid control using voltage control of freewheel current decay
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United States of America Patent
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-
Apr 4, 2006
Grant Date -
Oct 14, 2004
app pub date -
Jan 12, 2004
filing date -
Jul 12, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a vehicle fuel-injection system, additional voltage is applied to an otherwise current-controlled valve solenoid so as to increase the time window over which freewheeling current in the solenoid decreases from a pull-in level to a hold level. The time during which the Beginning of Injection Pulse (BIP) signal is detected is thereby increased.
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