Patent · US Expired

Injection valve

US4394973A · kind A · utility

17Cited by

9References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rudolf Sauer · Memmingen, DE
Wolfgang Kienzle · Hemmingen, DE
Werner Paschke · Schwieberdingen, DE
Waldemar Hans · Bamberg, DE

Key dates

Filing date	Mar 30, 1981
Grant date	Jul 26, 1983
Priority date	—
Expiry date	Mar 30, 2001

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M61/1806
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fuel injection valve is proposed for fuel injection systems of internal combustion engines, which serves to supply fuel into the intake tube of the engine. The injection valve includes a movable valve element which cooperates with a fixed valve seat, downstream of which are provided horizontal fuel guidance bores which discharge tangentially into a spin chamber. The spin chamber is disposed so that it widens conically in the flow direction. The fuel guidance bores simultaneously serve as metering bores. The spin chamber causes an axial speed component to be imparted to the fuel entering via the fuel guidance bores. As a result, the dwell time of the metered fuel within the spin chamber is short, and even in the case of quite short injection pulses, the fuel is still sufficiently well prepared.

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