Patent ID: 7198034
Filing Date: 2007-04-03
Classification: F02M

Abstract:
1. Method for the direct injection of fuel into an internal combustion engine in which a high-pressure pump with a variable flow rate supplies the fuel to a common rail, which in turn supplies the fuel to a series of injectors; the high-pressure pump comprising a number of cylinders, each of which is provided with a piston, an intake valve and a delivery valve; the method comprising: that the injection phase of at least two injectors is performed during a single pump stroke of a cylinder of the high-pressure pump, that each cylinder of the high-pressure pump is supplied with a substantially constant quantity of fuel during each intake phase and that the flow rate of the high-pressure pump is regulated by choking the pump stroke of each cylinder of the high-pressure pump so as to supply to the common rail a variable fraction of the fuel present in said cylinder at the end of the intake phase; wherein choking of a single pump stroke of each cylinder of the high-pressure pump is subdivided symmetrically into at least a first choking action associated with the injection phase of a first injector and into a second choking action associated with the injection phase of a second injector.