Internal combustion engine adjusting the rotation angle of a...

Details Internal combustion engine adjusting the rotation angle of a... Internal combustion engine adjusting the rotation angle of a...

2005-01-25

2005-01-25

Tyler, Cheryl J. (Department: 3746)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090180, C074S56800M, C464S160000

Reexamination Certificate

active

06845740

ABSTRACT:
A device for hydraulically adjusting the rotation angle of a camshaft with respect to a crankshaft of an internal combustion engine: A drive unit connected to a crankshaft and an output unit connected to a camshaft, having radially extending, axially facing sides secured by the pre-stressing force of a central securing bolt. The drive unit is rotably mounted to the output unit and they are so connected that at least two hydraulic pressure chambers transmit relative rotation forces. An annular disk with coating on opposite sides increases the frictional force between the end face of the output unit which faces the camshaft and the end of the camshaft and enables reduction of the pre-stressing force on the bolt. The character of visually detectable elements on the disk enable detection of the presence or absence of the disk.

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