Control system for automobile engine
US5924956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An idle speed control valve in a path bypassing an engine throttle valve is regulated in opening by feedback control and learning control in which a learned value depends upon a feedback control value to cause the engine to idle at a target speed of rotation. The determination of learned value is interrupted while a purge valve is remained open to purge fuel vapors into an air intake system for a specified period of time after detection of engine idling and resumed at a lapse of the specified period of time with interruption of on-idle fuel vapor purge. After the determination of learned value, the on-idle fuel vapor purge is resumed until an automatic transmission is shifted to, for instance, a drive range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.