Methods and systems for dual fuel injection system
US10323595B2 · kind B2 · utility
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5References
20Claims
0Family size
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Key dates
| Filing date | Sep 25, 2017 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Sep 25, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for reducing lean air-fuel ratio excursions due to degradation of a port injector while fueling an engine via each of port and direct injection. During a PFDI mode of engine operation, responsive to an indication of port injector degradation, such as due to circuit or injector power issues, intake airflow is limited by reducing the opening of an intake throttle. Air flow is limited to be based only on the direct injected fuel fraction, and independent of the commanded port injected fuel fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.