Injection control system of diesel engine
US6990958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2004 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Dec 10, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2441
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic control unit (ECU) of an injection control system of an internal combustion engine determines that a load of a fuel pump is stabilized when a pressure-feeding operation delay elapses since a command pressure-feeding quantity outputted to the fuel pump reaches a certain pressure-feeding quantity necessary to maintain a target injection pressure. The ECU permits a single injection when a waiting period necessary to measure rotation speeds once for each cylinder before the single injection is performed elapses since the load of the fuel pump is stabilized. Thus, the single injection timing is determined based on the time point when the command pressure-feeding quantity is stabilized, the pressure-feeding operation delay, and the waiting period. Therefore, an injection quantity learning operation can be performed highly accurately in a short period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.