Bi-level fuel pressurizing system
US6321527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
According to the present invention, a fuel delivery system having a fuel pump for providing an unregulated flow of fuel at a pressure and a metering valve receiving the unregulated flow of fuel and providing a regulated flow of fuel consists of a bi-level hydraulic pressurization system for controlling the output pressure of a fuel supply which includes a pressure regulating valve for maintaining a constant pressure differential across the metering valve by bypassing unregulated fuel from the metering valve input to the pump inlet. The pressurization valve controls the pressure of the regulated fuel output to the engine and is responsive to a signal indicative of an excess flow of unregulated fuel to control the fuel output to a first set point when the excess flow of unregulated fuel is less than a predetermined value and to a second set point when the excess flow of fuel is greater than the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.