FUEL INJECTION RATE SHAPING IN AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Mar 28, 2013
app pub date -
Apr 27, 2011
filing date -
Apr 27, 2010
priority date (Note) -
Abandoned
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Abstract
A fuel injection system for an internal combustion engine, comprising at least one fuel electroinjector, and an electronic control unit configured to supply the fuel electroinjector, in a fuel injection phase in an engine cylinder, with at least a first electrical command to cause a first fuel injection to be carried out, and a second electrical command cause a second fuel injection temporally subsequent to the first fuel injection to be carried out, the first and second electrical commands being separated in time by an electrical dwell time such that the second fuel injection starts without any discontinuity in time with respect to the first fuel injection. The electronic control unit is further configured to cause the first and second fuel injections to be carried out in engine operating conditions characterized by reduced fuel ignition delays, wherein fuel combustion is prevalently diffusive and heat released during fuel combustion is sensitive to fuel injection law.
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