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US 6,553,967 B2Granted
Injection nozzle
AssigneeRobert Bosch GmbH
InventorBernd Mahr
Life of this patent
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Abstract
An injection nozzle of a pressure-controlled fuel injection system has a control chamber for exerting pressure on a nozzle needle. The control chamber is connectable to a pressure reservoir via a pressure line that includes a 2/2-way valve. On the end of the nozzle needle that can be acted upon by pressure and is remote from the injection opening, a bore is embodied, by way of which the control chamber of the injection nozzle can be made to communicate with a leakage line as a function of the stroke of nozzle needle.
Claims12
In an injection nozzle (21;
- 41) of a pressure-controlled fuel injection system (1), having a control chamber (28;
- 42) for exerting pressure on a nozzle needle (22;
- 40), the control chamber (28;
- 42) being connectable to a pressure reservoir (6) via a pressure line (10) that includes a 2/2-way valve (9), the improvement wherein, on the end of the nozzle needle (22;
- 40) that can be acted upon by pressure and that is remote from the injection opening (13), a bore (36;
- 46a, 46b, 46c) is embodied, by way of which bore the control chamber (28;
- 42) and/or a work chamber (43) of the injection nozzle (21;
- 41) can be made to communicate with a leakage line (30;
- 45) as a function of the stroke of nozzle needle (22;
- 40).
7 more elements
Dependencies are inferred from the claim text.