Internal combustion engine evaporative emission control system
US6959696B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Apr 10, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel vapor control system that is adapted for use with internal combustion engines includes a fuel tank, an evaporative emission control device containing activated carbon and including a first orifice that fluidly communicates with the fuel tank via a vent line. A second orifice in the control device is open to the atmosphere. A purge tube is between a filter element and a venturi section of the engine and fluidly communicates with a third orifice in the control device via a vapor line. Fuel vapors are absorbed by the activated carbon when the engine is not running, and the carbon releases the fuel vapors to the engine via the purge tube when the engine is running.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.