| 摘要 |
PURPOSE:To control a plurality of solenoid valves at a high speed in a predetermined sequence, by a method wherein each of a plurality of solenoid valves is provided with a driving circuit, a solenid valve designating circuit, a generating circuit for an exciting current waveform signal, a generating circuit for a constant exciting current value and an exciting current signal selecting circuit for selecting output signals of both of the generating circuits. CONSTITUTION:The figure shows a Diesel engine controller, in which valve- opening and valve-closing commands for N solenoid valves NO1-NOn provided for each cylinder are outputted from a controlling circuit 16 in accordance with a crank angle signal, and are stored in registers 41-43. Exciting current waveform data in the register 41 are fed to an analog switch 48, solenoid valve designating data in the register 42 are fed to a photo-coupler 47 through a decoder 46, and valve-opening and valve-closing commands in the register 43 are fed to a flip-flop 49. In each cycle of an engine, each of the solenoid valve is sequentially designated once. |
