Secondary airflow system for engine exhaust emission diagnostics
US7647765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2006 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Nov 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In one example, a system for an engine having an intake system and an exhaust system is described. The system comprises: an airflow sensor coupled to the intake system; an air pump having at least an inlet side and an outlet side, said inlet side having a first coupling to the intake system downstream of said airflow sensor, said outlet side having a second coupling to the exhaust system; and a controller coupled to the engine, said controller, during operation, identifying whether degradation has occurred to at least one of said first and second couplings, and providing an indication of said identified degradation. Various other examples are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.