Fuel injection apparatus with pilot injection and main injection in internal combustion engines
US4520774A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1984 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Aug 24, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection apparatus with pilot injection and main injection in Diesel engines is proposed. A high-pressure injection pump delivers a main injection quantity to a main injection nozzle, while a hydraulic pilot injection auxiliary pump driven by the supply pressure of the high-pressure injection pump positively displaces a pilot injection quantity, via a piston, and delivers it to a pilot injection nozzle which is either separate or combined with the main injection nozzle. In the main injection area, a storage piston is separately provided, which without being mechanically connected to the pilot injection piston and without a pressure division is initially acted upon solely by the supply pressure of the high-pressure injection pump and only in the course of the pilot injection piston stroke is a line leading on to the storage piston opened up, at least indirectly, for the pumped fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.