Method and apparatus for fuel injection of engine system

摘要

A method for fuel injection of an engine system may include detecting driving information, including a combustion pressure in a combustion chamber, a heat generation amount in the combustion chamber, a crank angle, and a pressure/temperature/air amount of an intake manifold and an exhaust manifold, setting a fuel amount and injection timing with respect to a pilot injection as map data from an internal temperature, determining whether a maximum combustion pressure change rate is greater than a predetermined pressure change rate, determining generation timing of the maximum combustion pressure change rate, when the maximum combustion pressure change rate is greater than the predetermined pressure change rate, and decreasing a fuel amount of the pilot injection when the maximum combustion pressure change rate is generated during the pilot injection.

主权项

1. A method for fuel injection of an engine system, comprising:
detecting driving information, by a controller, including a combustion pressure in a combustion chamber, a heat generation amount in the combustion chamber, a crank angle, and a pressure/temperature/air amount of an intake manifold and an exhaust manifold; setting a fuel amount, by the controller, and injection timing with respect to a pilot injection as map data from an internal temperature, wherein the internal temperature is modeled from the pressure/temperature/air amount of the intake manifold and the exhaust manifold, and an exhaust gas recirculation amount by a variable valve apparatus; determining, by the controller, whether a maximum combustion pressure change rate is greater than a predetermined pressure change rate; determining, by the controller, generation timing of the maximum combustion pressure change rate, when the maximum combustion pressure change rate is greater than the predetermined pressure change rate; and decreasing a fuel amount of the pilot injection, by the controller, when the maximum combustion pressure change rate is generated during the pilot injection.