Patent · US Expired

Device for delaying the deflection of the nozzle needle of a fuel injection valve

US6290148A · kind A · utility

1Cited by

6References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Reda Rizk · Recklinghausen, DE
Wilhelm Frank · Echterdingen, DE

Key dates

Filing date	Sep 13, 1999
Grant date	Sep 18, 2001
Priority date	—
Expiry date	Sep 13, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/304
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A nozzle needle (60) of a fuel injection valve is guided axially in a nozzle body (50), and it points with its rear end face (61) into a compression chamber (15) and is operatively connected to a damping body (40). The recesses (46, 47, 48) of the damping body (40), together with the damping bore (14), form a fuel-filled damping chamber (40). Upon valve opening, the fuel in the compression chamber is compressed, and thus the valve opening is delayed. If the nozzle needle exceeds the damping stroke (hd), then the fuel is depressurized by a communication with an outflow chamber (12). The damping body is guided over at least part of its length in the damping bore.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.