Idle speed control method and system for an internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 8, 1985
Issued Date -
N/A
app pub date -
Jun 21, 1983
filing date -
May 22, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An intake air flow rate control method and system for an internal combustion engine includes an open loop control strategy carried out during unstable engine driving conditions. During open loop control, a pulse signal applied to an air flow rate control valve means is determined both as a function of open loop ratio and feedback ratio. The duty cycle of the pulse signal for open loop control is varied corresponding to engine coolant temperature as well as engine load condition. Thus, upon switching control operation from open loop control to feedback control, varying of pulse duty cycle to be applied to the valve means occurs smoothly. Further, in open loop control, the control system smoothly follows variations in engine load conditions.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully