PURPOSE: To improve responsiveness and stability in idling speed control, by installing a feedback control device, outputting a control signal, and a compensation value setting device, varying a control gain, both in a suction air quantity control valve.
CONSTITUTION: In time of idling, a control valve C, which controls a suction air quantity, and a feedback control device D, which sets a feedback control value and outputs a control signal to the control valve C, both are installed. A compensation value setting device E sets a compensation value on the basis of a difference between the engine speed detected by an engine speed detecting device A and the desired idling speed detected by a desired idling speed setting device B. When the desired speed is higher, a control gain is set to a larger value. Thus, in spite of fluctuations in the desired speed, excellent responsiveness and stability are all securable at all times.
AKAGI TOSHIMICHI
KOYAMA NAOYUKI
| JPS499555A | 1974-01-28 | |||
| JPS55142944A | 1980-11-07 | |||
| JPS57110745A | 1982-07-09 |