Electromaagnetic high-pressure injection valve
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United States of America Patent
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-
Jul 7, 1992
Grant Date -
N/A
app pub date -
Aug 26, 1991
filing date -
Feb 25, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electromagnetic high-pressure injection valve is used in the direct injection of fuel into the combustion chamber of internal combustion engines. The magnetic valve has a miniaturized magnetic circuit in which the necessary actuating forces are reduced by means of a particularly small seat diameter and a small stop surface for the valve needle, in comparision with prior art constructions. Fuel under high pressure streams completely around the moving parts of the valve. An adjustable seat base is also provided which provides high long-term calibration stability, despite its small size. In order to reduce closing rebound, a vibration damping system may also be used in mechanical injection systems. In order to attain the fastest adjustments, the valve may be fitted with a polarized magnetic circuit having a special feature which is its suspension inside two diaphragm springs with a very steep elasticity characteristic.
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