Electronic type fuel injector


PURPOSE: To widen the region of fuel injection control linearly by controlling the injection quantity of the fuel jetted from an injector not only from the injection time side but from the fuel pressure side for determining the injection quantity per time. CONSTITUTION: A microcomputer 1 controls the valve opening time of an injector 2 according to the engine state. The fuel pressure P=Pf-PM is actually measured from the fuel feed pressure Pf and the intake pipe pressure PM, and compared with an aimed value Po, and if P>Po, a pressure control valve 4 is opened to return a portion of fuel into a tank 6 through a return pipe 5. If P<Po, the control valve 4 is left in closed state. When the aimed value Po is reduced, the correction operation for prolonging the injection time is carried out, and on the contrary, when the aimed value Po is increased, the correction operation for shortening the fuel injection time is carried out, and the switching of the aimed value is carried out so that the discontinuity of fuel injection quantity is not generated. the control region can be widened linearly by controlling the ON/OFF of the control valve 4 by the output of the microcomputer 1. COPYRIGHT: (C)1986,JPO&Japio




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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    JP-S59122734-AJuly 16, 1984Mikuni Kogyo Co LtdElectronically controlled fuel injector

NO-Patent Citations (0)


Cited By (7)

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    JP-2012031830-AFebruary 16, 2012Denso Corp, 株式会社デンソーFuel supply control device of internal combustion engine
    US-2011197857-A1August 18, 2011Takumi Nonaka, Hideki WatanabeFuel injection device
    US-5035223-AJuly 30, 1991Fuji Jukogyo Kabushiki KaishaFuel injection control system for an internal combustion engine
    US-8899202-B2December 02, 2014Zama Japan Kabushiki KaishaFuel injection device
    US-9581117-B2February 28, 2017Zama Japan Kabushiki KaishaFuel injection device