Patent ID: 6675752
Filing Date: 2004-01-13
Classification: F01L

Abstract:
An internal combustion engine, comprising: a cylinder head having gas-exchange valves; at least one camshaft supported on the cylinder head, which camshaft is driven by a crankshaft to actuate corresponding gas-exchange valves on the cylinder head; a camshaft adjuster arranged on the camshaft, the adjuster having a hydraulic pressure chamber and being configured to use hydraulic pressure to rotate position of the camshaft relative to the crankshaft to change control times of the gas-exchange valves; and a feed device for providing hydraulic pressure to the camshaft adjuster and configured as a component separate from the cylinder head, the feed device having a ring for each camshaft, each ring having two grooves, each of the grooves being connected via associated hydraulic pressure channels in the feed device to a hydraulic pressure valve, each ring being arranged to surround a section of the camshaft, each surrounded section of the camshaft having two ring-shaped grooves, each of which grooves is aligned with one of the grooves of the corresponding ring to form a pair, each groove/ring-shaped groove pair of a ring is connected via associated hydraulic pressure channels in the camshaft to the hydraulic pressure chamber of the camshaft adjuster mounted on the camshaft.