Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1987-05-12
1988-11-29
Argenbright, Tony M.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9015, 464 2, F01L 134
Patent
active
047873450
ABSTRACT:
In an arrangement for the relative angular position change of two shafts drivingly connected with each other, especially between a crankshaft supported in an engine housing of an internal combustion engine and a cam shaft, the cam shaft is equipped with a driving gear which is angularly movably arranged relative to the cam shaft by way of an axially displaceable coupling member. An actuating mechanism for the axial displacement of the coupling member for an angular position change of the cam shaft relative to the driving gear and therewith to the crankshaft is arranged structurally separate from the cam shaft at a detachable engine housing cover. The actuating mechanism includes a hydraulically double-acting piston in a cylinder. The piston is detachably connected with a coupling rod whereby the coupling rod, in its turn, cooperates with the coupling member by way of a joint having three degrees of freedom. Additionally, the piston is guided with its sealing shank in the cylinder exclusively by way of sealing rings. The actuating mechanism is supplied from a hydraulic system separate from the internal combustion engine, which includes an accumulator containing the hydraulic medium under pressure, by way of lines in the engine housing cover.
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Argenbright Tony M.
Bayerische Motoren Werke A.G.
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