On-board fuel vapor recovery system having improved canister purging
US5237980A · kind A · utility
26Cited by
16References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Dec 2, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An irregularity that might otherwise be present in the flow characteristic of the system is cured by damping the motion of the armature of the CPS valve in two ways. One way comprises incorporating a "step" into the confronting faces of the armature and stator at their interface across the air gap. The other way comprises guiding the armature motion by means of a brass tube with sufficiently small running clearance such that pneumatic damping occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.