Daimler-benz Ag

Friedrich-Wilhelm Hase

Gerhard Frankle

A control member for regulating a flow of fuel to fuel injection devices of an air-compressing internal combustion engine. The control member is adapted to be arranged in one of a zone of the injection valve or within the injection valve. The control member includes a flow-controlling axially movable control piston having an axial bore with the control piston being urged, by a compression spring, into an end position for preventing a full flow of fuel through the control member. A spring chamber is provided for accommodating the compression spring with a throttle being arranged in an end face of the control piston, which throttle communicates the inlet line means with the spring chamber through the axial bore in the control piston. An arrangement is provided for minimizing an open volume of the spring chamber and at least one first bore is provided in the control piston for selectively communicating the axial bore with the outlet duct. A control edge arrangement is provided for controlling an opening and closing of the first bore with the control edge being arranged so as to close the first bore after the control piston is axially displaced over a predetermined portion of a working stroke. A throttle bore, in communication with the axial bore, is provided in the control means at a position offset in a longitudinal direction of the control piston with respect to the first bore. At least one second bore is provided in the control piston in a position offset in a longitudinal direction of the control piston with respect to a further throttle bore in a direction toward an end face of the control piston.

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Stuttgart, Germany

Friedrich-Wilhelm Hase