Electronic control for a hydraulic-actuator unit injector fuel system and method for operating same
US5564391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1993 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Jun 16, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for sampling the pressure of a hydraulic actuator fluid used in connection with an electronically controlled hydraulic actuator unit injector fuel system is disclosed. The apparatus and method eliminates aliasing and other sampling errors caused by oscillations in the hydraulic actuator fluid pressure. The apparatus and method senses an engine parameter to permit an electronic controller to calculate an injection time and duration for fuel to be delivered to a particular cylinder. The electronic controller issues a driver signal to a hydraulically actuated unit fuel injector. A hydraulic actuator fluid pressure sensor is associated with the pressurized hydraulic actuator fluid. The electronic controller samples the hydraulic actuator fluid pressure sensor in dependence on the issuance of the driver signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.