| 摘要 |
<p>At the time of drop of an injector current 3-1A of an internal combustion engine controller, the drop is performed quickly while heat generation of a drive circuit is suppressed, and valve closing response speed of the injector 3-1 is enhanced. The internal combustion engine controller includes a drive circuit 200 which drives an injector current 3-1A, and a boost circuit 100 which boosts a battery voltage 1, and includes a peak current path for guiding a boost voltage 100A of the boost circuit 100 to an upstream side of the injector 3-1 via a boost side switching element 202 and a boost side protection diode 203, a holding current path for guiding the battery voltage 1 to the upstream side of the injector 3-1 via a battery side switching element 212 and a battery side protection diode 213, a ground current path which is connected to a power supply ground from a downstream side of the injector 3-1 via a downstream side switching element 220-1, and a regenerating circuit which allows the boost circuit 100 to regenerate electric energy of the injector 3-1 from the downstream side of the injector 3-1 via a current regenerating diode 261, wherein the regenerating path is provided with a voltage regulating section in series with the current regenerating diode 261, and the drive circuit controls drive of the switching element.</p> |
