Apparatus and method for controlling idle rotation speed learning of an internal combustion engine
US5720256A · kind A · utility
3Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1996 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Nov 19, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/0032
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
When conditions for purging fuel vapor from a canister, and conditions for learning an idle rotation speed materialize together, then purge concentration is computed. If the purge concentration is low, purge is prohibited, and learning is carried out, while if the purge concentration is high, learning is prohibited and purge is carried out. In this way, erroneous learning due to carrying out purge during learning can be avoided, and the opportunity for purging can be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.