Patent ID: 8978625
Filing Date: 2015-03-17
Classification: F02D

Abstract:
1. A controller of an internal combustion engine comprising a drive circuit which drives an injector current for controlling an injector which injects a fuel, and a boost circuit which boosts a battery voltage, comprising: a peak current path for driving a peak current by guiding a boost voltage of the boost circuit to an upstream side of the injector via a boost side switching element and a boost side protection diode; a holding current path for driving a holding current by guiding the battery voltage to the upstream side of the injector via a battery side switching element and a battery side protection diode; a ground current path which is connected to a power supply ground from a downstream side of the injector via a downstream side switching element; and a regenerating circuit which allows the boost circuit to regenerate electric energy of the injector from the downstream side of the injector via a current regenerating diode, wherein the regenerating path is provided with a voltage regulating section in series with the current regenerating diode, and the drive circuit controls drive of the switching element.