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AssigneeRobert Bosch GmbH
InventorsJuergen Stegmaier, Bruno Hezel, Dietmar Uhlenbrock
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The invention concerns an oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine; in order to simplify the design of the oil separator and obtain easier installability, it is provided that the preliminary separator (28), the cyclone separator (30), the fine separator (32) and the valve device (36) provided, if necessary, are located on the outside (20) of the cylinder-head hood (4) and are covered by a housing half-shell (6) which, together with the outside (20) of the cylinder-head hood (4), forms a housing for the oil separator (2).
An oil separator (2) for crankcase gases of an internal combustion engine, comprising a preliminary separator (28), a cyclone separator (30), a fine separator (32) and, if necessary, a valve device (36) that are provided in a cascade arrangement on a cylinder-head cover (4) of the internal combustion engine,
The oil separator according to one or more of the preceding claims, wherein the housing half-shell (6) comprises circumferential side walls (8) extending in the direction toward the cylinder-head hood (4) that transition into a full-perimeter, front edge (18) with which the housing half-shell (6) can be placed against the outside (20) of the cylinder-head hood (4) in sealing fashion.
The oil separator according to one or more of the preceding claims, wherein the housing half-shell (6) comprises laterally-projecting, preferably integral lugs (23) that are penetrated by screws (22), or a fastening by means of elements that catch, snap in place, or latch in any other fashion is provided.
The oil separator according to one or more of the preceding claims, wherein the flow path is redirected essentially at a right angle downward in the direction toward the outside (20) of the cylinder-head hood (4) between an upwardly opening outlet (58) of the fine separator (32) and an outlet (38) of the oil separator.
The oil separator according to one or more of the preceding claims, wherein a recess is provided between a housing region (14) enclosing the fine separator (32) and a housing region (16) of the housing half-shell (6) enclosing the outlet (38) and/or the valve device (36), into which said recess—when the oil separator is installed—an opposed shape (59) of the cylinder-head hood surface having a complementary shape engages.
The oil separator according to one or more of the preceding claims, wherein an oil drain opening (44) is provided in the flow or cascade direction upstream from the cyclone separator (30), through which oil separated in the preliminary separator (28) can be removed from the flow path.
The oil separator according to one or more of the preceding claims having at least two helixes (48) with different radial depths of flow path, which can be optionally inserted into a housing region (14) of the housing half-shell (6) enclosing the cyclone separator while all other outer dimensions of the cyclone separator (30) remain the same.
Dependencies are inferred from the claim text.