Injector driving control apparatus

• Main Authors: Yamakado, Makoto, Maekawa, Noriyuki, Ogura, Kiyotaka, Hino, Kazutaka, Ishikawa, Tohru
• Format: Patent
• Language: English
• Published: 27.07.2004

The present invention relates to an injector driving control apparatus for use in controlling a fuel injector for supplying fuel to an internal combustion engine; and, more particularly, the invention relates to a technique for achieving a wide dynamic fuel pressure range by controlling the fuel injection volume according to the waveform of the current being generated to drive the injector, instead of changing, in a wide range, the fuel pressure of the fuel supplied to the injector. An injector driving control apparatus operates with minimum power consumption, while ensuring linearity (proportionality between the current supply duration and fuel injection volume of the injector) in a wide fuel pressure range. A coil current feedback circuit is provided for controlling the current feedback duration according to the fuel pressure after applying the current at a boost voltage. This enables optimal control of the injector, and, hence, an improvement in the fuel injection volume characteristics (linearity) and a reduction in the heat generated in the injector driving control circuits.