On the Potential of Transfer Port Injection Strategies for a Two-Stroke Engine
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20229057
- Paper/Info type
- SETC
No.2022-32-0057
- Pages
- 1-11(Total 11 p)
- Date of publication
- Oct 2022
- Publisher
- JSAE
- Language
- English
- Event
- SETC2022
Detailed Information
| Author(E) | 1) Francesco Balduzzi, 2) Luca Romani, 3) Giovanni Ferrara, 4) Paolo Trassi, 5) Jacopo Fiaschi |
|---|---|
| Affiliation(E) | 1) Università degli Studi di Firenze, 2) Università degli Studi di Firenze, 3) Università degli Studi di Firenze, 4) Betamotor SpA, 5) Betamotor SpA |
| Abstract(E) | The main drawback of an in-cylinder Low Pressure Direct Injection (LPDI) in a two-stroke engine is the difficulty of achieving a satisfactory vaporization level in low load conditions. The liquid droplets are characterized by large diameters and, when the temperature level and the velocity of the scavenging flow field are low, the time needed for the droplet vaporization and the homogenization with fresh air becomes too long to guarantee a suitable mixture formation. A transfer port injection allows a higher flexibility, due to the possibility of performing a mixed injection either directly in the cylinder or indirectly in the crank case, depending on the load request or engine speed. Also, an even lower injection pressure can be adopted with respect to an in-cylinder LPDI injection, which is relevant in case of lightweight and low power applications. On the other hand, the time available for the direct in-cylinder injection is limited to the scavenge phase. |
