Development of GDI engine injector correction algorithm in small flow
2022-01-0610
03/29/2022
- Event
- Content
- Advanced combustion strategies for direct injection gasoline engines require high performance fuel injectors. They must perform precise fuel metering, enhanced linear flow range and multi-pulse injection cycles in order to meet tight emission limits, and they work in their “ballistic” region, where the correlation between coil energizing time and injected fuel amount becomes highly not linear. And their performance may vary due to the impact of production tolerances and aging. We developed the algorithm that in real time without installing a special sensor, measure and correct two characteristics: the opening delay time and the flow quantity. The injector's opening delay time was defined as the time between the occurrence of a control signal and the moment of the valve's starting to move. The injector's flow quantity was defined as the injected fuel mass from the opening to the closing. Results showed that the proposed logic has the potential to increase the minimum fuel injection capabilities and the combustion stability and decrease the emission by production tolerances and aging effect.
- Citation
- Hong, D., "Development of GDI engine injector correction algorithm in small flow," SAE Technical Paper 2022-01-0610, 2022, .