Patent ID: 7536996
Filing Date: 2009-05-26
Classification: F02D,Y02T

Abstract:
1. A fuel injection controller that controls a fuel injection mode of at least one injector by outputting a command signal when fuel used in combustion for generating an output power of a target engine is injected and supplied through the injector directly into at least one cylinder, in which the fuel combustion of the engine occurs, the fuel injection controller comprising: at least one cylinder pressure sensor provided to at least one cylinder for outputting a sensing signal corresponding to pressure in the same cylinder; and an injection control means for variably controlling the command signal sent to the injector in relation to certain injection supply of the fuel, which is performed during the fuel combustion in the cylinder having the cylinder pressure sensor as an object cylinder for additionally injecting and supplying the fuel to be used in the combustion in the cylinder as the object cylinder, on the basis of an output of the cylinder pressure sensor when the certain injection supply of the fuel is performed; wherein the injection control means predicts a valve closing timing cylinder pressure as a pressure in the cylinder as the object cylinder at certain timing when the injector ends a valve closing operation on the basis of an output of the cylinder pressure sensor sensed before the certain timing and variably controls the command signal relating to an injection quantity of the injector on the basis of the predicted valve closing timing cylinder pressure.