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Fuel injection device for internal combustion engine has smaller cross-section of connection to relief chamber exposed with increased injection valve element opening displacement
Fuel injection device for internal combustion engine has smaller cross-section of connection to relief chamber exposed with increased injection valve element opening displacement
The device has a second choke point with a fixed flow cross-section in a connection between a control pressure chamber and relief chamber. A control piston controls a flow cross-section from the control pressure chamber to the connection so a smaller cross-section is exposed with increased injection valve element opening displacement. The cross-section is smaller than that of the second choke point for maximum opening displacement. The device has a second choke point (75) with a fixed flow cross-section in a connection between a control pressure chamber and a relief chamber. A control piston (60) controls a flow cross-section from the control pressure chamber (62) to the connection (74) to the relief chamber (24) depending on the stroke of the piston so that a smaller cross-section is exposed with increased injection valve element (28) opening displacement and the cross-section is smaller than that of the second choke point for maximum opening displacement.
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