Method and device for controlling energization of high pressure electromagnetic valve
US4726345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Mar 4, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In controlling a time period of energization of a high pressure electromagnetic valve (50) in accordance with a target value of a fuel injection quantity determined from at least an engine speed (Ne) and an engine load, when a target indicated value (theta) of the time period of energization determined from at least the engine speed and the engine load is lower than a zero indicated value (theta.sub.0) of the time period of energization when the fuel injection quantity becomes zero, which is determined from the engine speed, the energization of the high pressure electromagnetic valve is cut off. Therefore, the duty cycle of the high pressure electromagnetic valve is decreased thereby increasing the reliability of the valve. In addition, fuel is reliably cut off when the fuel injection quantity is 0 mm.sup.3 /st thus avoiding fuel leakage and preventing the generation of white exhaust smoke. Fuel economy can therefore be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.