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US 6,186,420 B1Granted
Fuel injection valve for internal combustion engines
AssigneeRobert Bosch GmbH
InventorKarl Hofmann
Life of this patent
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AssigneeRobert Bosch GmbH
InventorKarl Hofmann
Estimating the term…
A fuel injection valve for internal combustion engines, having a fuel inlet conduit, which originates at a connection stub and discharges at at least one injection opening. A rodlike fuel filter is inserted into the fuel inlet conduit and is guided in the inlet conduit on opposite axial ends. Two groups of longitudinal grooves are formed in the jacket face each of which are axially closed on one end. The first group of longitudinal groove originate at an upper end face of the fuel filter remote from the injection opening, and the second group originates at a lower fuel filter end face oriented toward the injection opening. The size of the flow cross section at the fuel filter and the size of the flow cross section of the inlet conduit in the region downstream of the fuel filter amounts to from approximately 5-10 times the size of the total flow cross section of all the injection openings in the fuel injection valve.
A fuel injection valve for internal combustion engines, comprising a fuel inlet conduit (23), which originates at a connection stub (25) and discharges at a least one injection opening (17), and into which a rodlike fuel filter (35) is inserted, said fuel filter is guided in the inlet conduit on axial ends of the fuel filter and into whose jacket face two groups of longitudinal grooves, axially closed on one end, are machined, a first group of longitudinal grooves (39) originate at an upper end face (41) of the fuel filter (35) remote from the injection opening (17), and a second group (43) originates at a lower fuel filter end face (45) oriented toward the injection opening (17), the size of the flow cross section at the fuel filter (35) and the size of the flow cross section of the fuel inlet conduit (23) in the region (27) downstream of the fuel filter (35) amounts to from 5-10 times a size of a total flow cross section of all the injection openings (17) in the fuel injection valve.
Dependencies are inferred from the claim text.