Fuel-injection system for engine
US6237567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 16, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/3809
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel-injection system for an engine is disclosed in which a standard conductive duration of the individual injectors required for a desired volume of fuel injected per cycle may be easily provided by correcting a standard conductive duration to a solenoid-operated valve, which has been found depending on a standard fuel-injection characteristic. A controller unit is stored with a standard fuel-injection characteristic A that is used for obtaining a standard actuating pulse width Pws for the standard conductive duration corresponding to a desired volume Qf of the injected fuel, which is required depending on the operating conditions of the engine. A specified operating point (Q1, Pw1) is a known data that has been previously observed for the individual injectors. The actuating pulse width Pw necessary for determining the desired volume Qf of injected fuel is given by multiplying the standard actuating pulse width Pw1 by a correction coefficient that is a ratio of the standard actuating pulse width Pws1 to the specified actuating pulse width Pw1. The correction coefficient is computed at plural selected pressure ranges of a hydraulically actuated fluid while the process of interpol…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.