| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the valve closing response speed of an injector by quickly performing the drop while suppressing heat generation of a drive circuit at the time of drop of the injector current of an internal combustion engine controller. <P>SOLUTION: The internal combustion engine controller includes a drive circuit which drives the injector current, and a boost circuit which boosts the battery voltage, and further includes a peak current path for guiding the boost voltage of the boost circuit to the upstream side of the injector via a boost side switching element and a boost side protection diode, a holding current path for 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 the downstream side of the injector via a downstream side switching element, and a regenerating path which allows the boost circuit to regenerate the electric energy of the injector from the downstream side of the injector via a current regenerating diode. The regenerating path is provided with a voltage regulating section in series with the current regenerating diode, and the drive circuit controls the drive of the switching element. <P>COPYRIGHT: (C)2012,JPO&INPIT |
