Fault diagnostic for an internal combustion engine having air assisted injectors
US6550319B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1998 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine having electronic throttle control includes an air assisted injector system for directing a controlled amount of air directly to the combustion chamber without passing through the throttle body. A method of diagnosing faults in the air assisted injector system is disclosed. The method comprises the steps of measuring the airflow entering an intake of the electronic throttle of the engine at idle speed with the air assisted injector system operating at a first rate of airflow, turning the air assisted injector system off, measuring the airflow entering the intake of the electronic throttle of the engine at idle speed with the air assisted injector system off, and generating an error signal as a function of the two measured values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.