Enhanced diagnostic signal to detect pressure condition of a particulate filter
US9163537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jun 13, 2033 |
Classification
- Technology area (CPC —)General
Abstract
An exhaust gas treatment system includes a particulate filter to collect particulate matter from exhaust gas flowing therethrough. The particulate filter realizes a pressure thereacross in response to the exhaust gas flow. A delta pressure sensor determines a first pressure upstream from the particulate filter and a second pressure downstream from the particulate filter. A delta pressure module is in electrical communication with the delta pressure sensor. The delta pressure module determines a pressure differential value based on a difference between the first pressure and the second pressure and generates a diagnostic signal based on a plurality of the pressure differential values and a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.