Patent ID: 9267459
Filing Date: 2016-02-23
CPC Classification: F02D

Claim Text:
1. A fuel-injector-replacement determining device which is applied to a fuel injection system including a fuel-injector for injecting a fuel into an internal combustion engine, an electronic control unit controlling an operation of the fuel-injector based on characteristic data of the fuel-injector, an injector-memory means provided to the fuel-injector, and a controller-memory means provided to the electronic control unit, and a data-update means updating the characteristic data stored in the controller-memory means into the characteristic data stored in the injector-memory means in a case that the fuel-injector is replaced, the fuel-injector-replacement determining device comprising; a learning means for obtaining a learning value of the characteristic data and for updating the characteristic data stored in the controller-memory means into the learning value while the internal combustion engine is running; an updating means for updating the characteristic data stored in the injector-memory means into the characteristic data stored in the controller-memory means when an ignition switch is turned off to stop the internal combustion engine; a collation means for determining whether the characteristic data stored in the controller-memory means are consistent with the characteristic data stored in the injector-memory means when the ignition switch is turned on to start the internal combustion engine; and a replacement determination means for determining that the fuel-injector is replaced without updating the characteristic data stored in the controller-memory means into the characteristic data stored in the injector-memory means when the collation means determines that characteristic data stored in the controller-memory means are not consistent with the characteristic data stored in the injector-memory means.