CONTROL METHOD OF IDLE SPEED IN ELECTRONICALLY CONTROLLED ENGINE

摘要

PURPOSE:To smoothly control an idle speed, by storing the final feedback instruction value in an idle state to the memory unit of a microcomputer and using this value as the first instruction value when transferred again to the idle state. CONSTITUTION:A target idle speed, most suitable for an operational condition of an engine, is set to a microcomputer 10, compared with a present speed detection signal 15 and obtained with a feedback instruction value, and this value is fed back to an idle speed controller 9, formed separately from a throttle valve 7, to control the target speed. At transfer from this idle state to the other state, the final feedback instruction value in the idle state is stored to a memory 12. When transferred again to an idle state, the preceding final instruction value, stored as the first feedback instruction value, is used. Accordingly, idle speed control can be smoothly performed.