Constant-speed multi-pressure fuel injection system for improved dynamic range in internal combustion engine
US7775191B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2008 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/0052
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system operates under a predetermined substantially constant pump speed and creates multi-pressure levels by diverting the fuel flow. Fuel pressure can be switched from one steady pressure level to another level on-demand instantly. This superimposes and overlaps typical fuel injection events in the linear operating ranges under different pressure levels, significantly increasing the fuel injection dynamic range. The dynamic range is further increased when another predetermined constant pump speed is assigned. Thus, the system saves fuel and reduces exhaust emission in city driving when gas pedal is released including idle. The same system can instantly deliver additional fuel on-demand for extra power beyond engine rating producing a sport-car-like performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.