Patent ID: 9644562
Date: 2017-05-09
CPC Classifications: F02D

Claim:
1. An injector driving apparatus comprising: a driving circuit for supplying a current individually to coils of multiple injectors mounted on an engine of a vehicle; a common current flow path, in which a current flows to the coils in common; a current detection element provided in the common current flow path for detecting the current flowing in the common current flow path as a current, that flows to the coils; a current supply period guard part for measuring a period, during which the current continues to flow in the common current flow path, based on a detection result of the current detection element, and forcibly stopping the current supplied from the driving circuit to the coils when a measured period reaches a predetermined set period; and a diagnosis part for checking whether the current supply period guard part normally stops the current supplied from the driving circuit to the coils, wherein the diagnosis part performs a checking operation in a period of no fuel injection into the engine.