System and method for determining purge valve flow tolerance
US6830039B2 · kind B2 · utility
2Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D7/0635
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An arrangement for determining purge valve flow tolerance for use with evaporative emissions control systems includes developing an equation based on data relating purge valve duty cycle to flow, wherein the equation describes a flow curve with reference to a first axis and a second axis. The arrangement further includes using the equation as a base equation for flow, and adapting the equation for part-to-part tolerance as a function of an intercept point of the equation with respect to the first axis, wherein the first axis relates to duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.