Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Fuel injection control device
 A fuel injection control device expanding the dynamic range for controlling the amount of fuel and preventing the wasteful consumption of electric power. The device comprises fuel pressure regulator means 4 for adjusting the fuel pressure Pf, various sensors 3 inclusive of a fuel pressure sensor, injector drive means 5A for opening the valve body of an injector 2, and injection control means 1A for controlling the fuel pressure regulator means and the injector drive means depending on the operation conditions, wherein the injection control means 1A includes a holding current control unit 16A that variably sets the injector holding current iha depending on the fuel pressure in order to control the valve-opening time by controlling the exciting current ia and the excitation time of the injector, and variably sets the holding current to a minimum required value so that the holding current decreases with a decrease in the fuel pressure. 
Mitsubishi Denki Kabushiki Kaisha
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Tetsushi
Watanabe