Patent ID: 8566005
Filing Date: 2013-10-22
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel injection detecting device detecting a fuel injection condition, the fuel injection detecting device being applied to a fuel injection system in which a fuel injector injects a fuel accumulated in an accumulator, the fuel injection detecting device comprising: a fuel pressure sensor provided in a fuel passage fluidly connecting the accumulator and a fuel injection port of the fuel injector, the fuel pressure sensor configured to detect a fuel pressure which varies due to a fuel injection from the fuel injection port; and a maximum fuel injection rate computing unit configured to compute a maximum fuel injection rate based on wherein the maximum fuel injection rate computing unit includes the maximum fuel injection rate computing unit is configured to compute the maximum fuel injection rate based on the falling-modeling function and the rising-modeling function wherein the maximum fuel injection rate computing unit includes the maximum fuel injection rate computing unit configured to compute a maximum fuel injection rate based on a pressure difference between the reference pressure and the intersection pressure, wherein the maximum fuel injection rate computing unit is configured to compute the maximum fuel injection rate such that the maximum fuel injection rate is larger as the intersection pressure is smaller in a case that the pressure difference between the reference pressure and the intersection pressure is smaller than or equal to value, and the maximum fuel injection rate computing unit is configured to compute the maximum fuel injection rate based on the specified upper value without respect to the intersection pressure in a case that the pressure difference is greater than the specified value.