Fuel injection valve for internal combustion engines
US4528951A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1984 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | May 18, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M61/1826
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The nozzle body has a main nozzle hole and a sub nozzle hole formed therein, the latter being directed at a predetermined angle with the former and smaller in discharge area than the former. The nozzle needle slidably received in the nozzle body is disposed such that its tip is fitted in the main nozzle hole when the nozzle needle is in a seated position thereof, and the tip substantially remains in the main nozzle hole during lifting of the nozzle needle before the nozzle needle lifts through a predetermined stroke, whereby fuel is injected substantially solely through the sub nozzle hole in a first predetermined direction, while the tip of the nozzle needle substantially comes out of the main nozzle hole after the nozzle needle has lifted through the predetermined stroke, whereby fuel is injected mainly through the main nozzle hole in a second predetermined direction different from the first predetermined direction by the above predetermined angle. Control means is responsive to operating conditions of the engine to allow the nozzle needle to lift only through the above predetermined stroke in a low speed/low load region of the engine, while allowing the nozzle needle to lift bey…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.