Device for the hydraulic adjustment of the angle of rotation...

Details Device for the hydraulic adjustment of the angle of rotation... Device for the hydraulic adjustment of the angle of rotation...

2006-03-21

2006-03-21

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C464S160000

Reexamination Certificate

active

07013854

ABSTRACT:
A device (1) for the hydraulic adjustment of the angle of rotation of a camshaft (3) in relation to a crankshaft of an internal combustion engine, situated at the drive-side end (2) of the camshaft (3) and formed of a drive unit (4) that stands in a driven connection with the crankshaft and an output unit (5) that is connected in rotationally fixed fashion with the camshaft (3) is provided. The drive unit (4) stands in a force-transmitting connection with the output unit (5) via at least two pressure chambers (6, 7) formed inside the device (1), the supply of pressure medium to the pressure chambers (6, 7) taking place via a separate distributor housing (8) that has a connecting flange (10) suitable for transmitting pressure medium to the device (1) and a control valve receptacle (9) that is connected to the connecting flange (10) via two pressure medium conduits (11, 12). The output unit (5) is fastened non-positively to the camshaft (3), which passes through the device axially with its drive-side end (2) and has a hollow construction, the end segment (13) of the camshaft (3) being enclosed by the connecting flange (10) of the distributor housing (8) and having a plurality of radial bores (17, 18) that stand in pressure medium connection with additional radial bores (19, 20) in the camshaft (3) via a distributor insert (22) that can be placed into the hollow space (21) of the camshaft (3).

REFERENCES:
patent: 5301639 (1994-04-01), Satou
patent: 5988126 (1999-11-01), Strauss et al.
patent: 6129060 (2000-10-01), Koda

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