Method of testing an evaporative emission control system
US5606121A · kind A · utility
34Cited by
28References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1996 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Mar 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of testing an evaporative emission control system to determine if the evaporative emission control system has reached a predetermined pressure includes the steps of pulsing a leak detection pump at a predetermined rate and determining if a last pump period is greater than or equal to a predetermined test mode period threshold. The method also includes the steps of pressurizing the evaporative emission control system if the last pump period is less than a test mode period threshold and continuing the method if the last pump period is equal to or greater than the test mode period threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.