Patent ID: 9121360
Filing Date: 2015-09-01
Classification: F02D

Abstract:
1. A method for operating a fuel injection system of an internal combustion engine, comprising: ascertaining a pulse duty factor at which a quantity control valve one of just no longer opens and just barely opens; delivering fuel by a high-pressure pump into a fuel rail; and influencing a quantity of the delivered fuel by the quantity control valve operated by an electromagnetic operating device, at least one parameter of a braking pulse of the electromagnetic operating device depending on both an efficiency of the electromagnetic operating device and also at least one of (a) a voltage of a voltage source, (b) a temperature, and (c) a temperature of at least one component of at least one of (i) the fuel injection system and (ii) the internal combustion engine; wherein at least one level of efficiency of the electromagnetic operating device is characterized as having one of a high level of efficiency and a low level of efficiency according to the ascertained pulse duty factor, and wherein, responsive to the at least one level of efficiency being characterized as having the high level of efficiency, the braking pulse at least one of (a) occurs later, (b) has a shorter duration, and (c) is weaker, than in a case of an electromagnetic operating device having a lower level of efficiency, and wherein, responsive to the at least one level of efficiency being characterized as having the low level of efficiency, the braking pulse at least one of (a) occurs earlier, (b) has a longer duration, and (c) is stronger, than in a case of an electromagnetic operating device having a higher level of efficiency.