Injection control system of internal combustion engine
US6988030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2004 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Nov 18, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/3845
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic control unit (ECU) of an engine calculates a first modification value for decreasing a correction value of an injection period when a state variation of the engine caused by a single injection is greater than a target value. The ECU calculates a second modification value for increasing the correction value when the state variation is less than the target value. The second modification value is greater than the first modification value. Thus, a period necessary to converge the correction value can be shortened when the correction value is increased. The first modification value is increased if a difference between the state variation and the target value exceeds a permissible value when the correction value is decreased. Thus, the injection quantity is decreased quickly to prevent excessive fuel injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.