Fuel injection system
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United States of America Patent
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-
Sep 19, 2006
Grant Date -
Jun 1, 2006
app pub date -
Mar 31, 2005
filing date -
Mar 31, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A booster unit is provided in an injector of a fuel injection system. The booster unit comprises a booster piston accommodated in a pressure chamber, and a discharge valve capable of discharging fuel in a backpressure chamber. A controller has an indication-value setting step of setting an indication value of a target pressure in a common rail in correspondence to an engine operation state, a determination step of determining whether or not the indication value of the pressure in the common rail is in a direction of reduction to be lower in comparison to a previously set indication value, and a step of prolonging an open time of a discharge valve of the booster unit when the determination step has determined that the indication value is in the direction of reduction.
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