Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2005-05-24
2005-05-24
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
06895913
ABSTRACT:
The invention relates to an internal-combustion engine with a hydraulic device (1) for rotation angle adjustment of a camshaft (3) relative to a crankshaft thereof, which is arranged on the drive-side end (2) of the camshaft (3) supported in several radial bearings (4) in the cylinder head (5) of the internal-combustion engine. The device essentially includes a drive unit (6) drivingly connected with the crankshaft and also of a driven unit (7) rotationally fixed to the camshaft (3). The drive unit (6) is in force-transfer connection with the driven unit (7) through at least two pressure chambers (12, 13), which are formed within the device (1) and which can be charged with a pressurized medium, wherein the pressurized medium is fed from one of the radial bearings (4) of the camshaft (3) and supplied to the pressure chambers (12, 13) of the device via first and second radial bore holes (14, 15) and via first and second axial channels (16, 17) in the camshaft (3), and also via first and second axial channels (19, 20) and via first and second radial bore holes (21, 22) into the driven unit (7). At least the first axial channels (16) formed as coaxial bore holes in the camshaft (3) and the first axial channels (19) in the driven unit (7) of the device (1) are connected to each other via a ring-shaped pressurized medium adapter (23) arranged between the end (18) of the camshaft (3) and the driven unit (7) of the device (1).
REFERENCES:
patent: 6390044 (2002-05-01), Yoshizawa et al.
patent: 6505585 (2003-01-01), Machida et al.
Dietz Joachim
Ottersbach Rainer
Denion Thomas
Eshete Zelalem
INA-Schaeffler KG
Volpe and Koenig P.C.
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