Method of pinched line detection for an evaporative emission control system
US5616836A · kind A · utility
19Cited by
28References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1996 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Mar 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of pinched line detection for an evaporative emission control system to determine if a pinched line is present within the system includes the steps of pulsing a leak detection pump at a predetermined rate and determining if a last pump period is less than a predetermined possible pinched line period limit. The method also includes the steps of concluding a possible pinched line if the last pump period is not less than the possible pinched line period limit and concluding that there is not a possible pinched line if the last pump period is greater than or equal to the possible pinched line period limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.