Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Reexamination Certificate
2006-07-25
2006-07-25
Argenbright, T. M. (Department: 3747)
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
C123S295000
Reexamination Certificate
active
07080624
ABSTRACT:
A method for avoiding an injector orifice internal coking of the spray orifices of a multi-orifice fuel injector of a direct injection internal combustion engine, e.g., of a motor vehicle, is provided. Fuel is injected into a combustion chamber of the internal combustion engine by multiple injections. The fuel is injected by a first main injection during the intake stroke and by a subsequent postinjection during the compression stroke before the ignition time. Thereby, during a long operation of the internal combustion engine, especially in a homogeneous operation, the injection time does not have to be continually increased in order to compensate for the increasingly shrinking cross section of the spray orifices.
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Friedhelm Hage, “Untersuchung der Einspritzdusenverkokung an einem Personenwagen-Dieselmotor,” Motortechnische Zeitschrift, vol. 47, No. 7/8 (1986) pp. 291-292; 295-298.
Britsch Heinz
Wuerfel Gernot
Argenbright T. M.
Kenyon & Kenyon LLP
Robert & Bosch GmbH
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