Fuel injection valve for internal combustion engines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 1, 1998
Issued Date -
N/A
app pub date -
Aug 21, 1997
filing date -
Jun 6, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The opening and closing motion of a control piston effectively connected to an injection valve element is optimally designed in that in addition to a first control space, there is a second control space whose volume and fuel control pressure can be changed by the piston motion. During the opening motion, the pressure in the second control space retards the opening procedure. During the closing motion, the control piston is additionally accelerated by the system pressure when there is a predetermined pressure in the second control space in order to effect rapid closing of the injection openings. Relief elements ensure a pressure balance between the second control space and the high-pressure region. One of the two control spaces is connected to the high-pressure region when there is a predetermined pressure in the second control space.
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