Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Reexamination Certificate
2005-02-15
2005-02-15
Mohanty, Bibhu (Department: 3747)
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
C123S294000
Reexamination Certificate
active
06854441
ABSTRACT:
This system for controlling the combustion noise of a motor vehicle diesel engine of the type including means for feeding each of its cylinders with fuel by multiple injections of fuel, which means are adapted to trigger fuel feed into each cylinder in the form of at least one pilot injection and a main injection of fuel, comprises:means for determining pressure gradients in the engine cylinder while in operation, at least during the pilot and main injection stages; andmeans for determining the quantity of fuel to be injected into the cylinder during pilot injection for a predetermined quantity of fuel injected during main injection so as to optimize a criterion based on the ratio between the pressure gradients corresponding to the pilot and main injection stages, thereby optimizing the operating noise of the engine.
REFERENCES:
patent: 6363914 (2002-04-01), Tanabe et al.
patent: 1 128 050 (2001-08-01), None
patent: 1 219 805 (2002-07-01), None
patent: 1 316 704 (2003-06-01), None
patent: 1 316 709 (2003-06-01), None
Bauge Yvon
Lorret Cédric
Meissonnier Guillaume
Vermonet Claire
Delphi Technologies Inc.
Mohanty Bibhu
Peugeot Citroen Automobiles SA
Westerman Hattori Daniels & Adrian LLP
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