Internal-combustion engines – Charge forming device – Including means responsive to instantaneous change in engine...
Reexamination Certificate
2006-01-31
2006-01-31
Argenbright, Tony M. (Department: 3747)
Internal-combustion engines
Charge forming device
Including means responsive to instantaneous change in engine...
C123S458000, C123S480000
Reexamination Certificate
active
06990958
ABSTRACT:
An electronic control unit (ECU) of an injection control system of an internal combustion engine determines that a load of a fuel pump is stabilized when a pressure-feeding operation delay elapses since a command pressure-feeding quantity outputted to the fuel pump reaches a certain pressure-feeding quantity necessary to maintain a target injection pressure. The ECU permits a single injection when a waiting period necessary to measure rotation speeds once for each cylinder before the single injection is performed elapses since the load of the fuel pump is stabilized. Thus, the single injection timing is determined based on the time point when the command pressure-feeding quantity is stabilized, the pressure-feeding operation delay, and the waiting period. Therefore, an injection quantity learning operation can be performed highly accurately in a short period.
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patent: 6557530 (2003-05-01), Benson et al.
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patent: 2004/0267433 (2004-12-01), Asano
Asano Masahiro
Haraguchi Hiroshi
Takemoto Eiji
Argenbright Tony M.
Denso Corporation
Nixon & Vanderhye P.C.
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