Evaporated fuel purge device for engine
US5655507A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1996 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Mar 5, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/0032
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Based upon a running condition of an engine, the air-fuel ratio of the fuel mixture supplied to the engine is controlled by open loop control to a target air-fuel ratio. The engine includes a mechanism which adsorbs evaporated fuel from a fuel tank, and a purge conduit which supplies a purge gas which is a mixture of this adsorbed fuel and air to the engine in a predetermined running condition. The purge flow rate is changed according to change in the target air-fuel ratio by controlling the flow rate through the purge conduit according to the proportion between the target air-fuel ratio and a predetermined value. By doing this, deviations in the air-fuel ratio precipitated by purging are eliminated, and the accuracy of air-fuel ratio control is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.