System for controlling the idle speed of an automotive engine
A system is described for controlling the idle speed of an engine for a vehicle, comprising; means for producing an engine starting signal when the engine is not started; means including an engine starter switch for producing a starter signal when the starter switch is on when the engine is started and respectively a start signal when the starter switch is off when the engine is started; setting means responsive to the engine starting signal or the starter signal for setting a flag; sensing means for detecting idle operation of the engine for producing an idle signal; an actuator for controlling the speed of the engine; first means responsive to the start signal, to the idle signal, and to existence of the flag for producing a first signal; resetting means responsive to the start signal and to nonexistence of the idle signal for resetting the flag to nonexistence of the flag; second means responsive to the start signal, to the idle signal and to nonexistence of the flag at any vehicle speed for producing a second signal; a first look-up table storing data for high idle speed; a second look-up table storing data for low idle speed; third means responsive to the first signal for reading out the data from the first look-up table and for actuating the actuator for controlling the engine speed in accordance with the data; and fourth means responsive to the second signal for reading out other data from the second look-up table and for actuating the actuator for controlling the engine speed in accordance with the other data.
- Assignee:
- Fuji Jokogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4651694
- OSTI ID:
- 6651564
- Country of Publication:
- United States
- Language:
- English
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