| 摘要 |
PURPOSE:To obviate operation errors in a starting control, by storing the step value of a step motor driving a throttle valve, while transferring this value to another memory at the time of power failure in an electron device. CONSTITUTION:Signals from each sensor are inputted into a CPU46 for electronic circuits for engine control use via an A/D converter 47, an input/output interface RAM48 and an ROM input/output interface 49. In time of idling, it controls the pulse motor step value of a solenoid control valve 26 which drives a throttle bypass valve and regulates the number of idling revolution. The step value is stored in a second RAM50 powered by a sub-power source 54 connected to a battery 40 at all times, in a separate system other than an electric control circuit power source 54 connected to the battery 40 via an ignition switch 38 and then this stored value is transferred to a first RAM48 when the main power source is out of order. |
