Device for varying valve timing in an internal combustion...

Details Device for varying valve timing in an internal combustion... Device for varying valve timing in an internal combustion...

2006-05-23

2006-05-23

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090270, C123S090310, C074S640000

Reexamination Certificate

active

07047923

ABSTRACT:
A device for varying valve timing in an internal combustion engine comprises an adjusting mechanism for varying an angle of rotation between a drive pinion (2) and a camshaft (end portion of the camshaft1), said adjusting mechanism being configured as a wobble transmission. The drive pinion (2) comprises a first front-end gearing (9) and a disk (10) comprises a second front-end gearing (11), which first and second front-end gearings mesh partially with each other, and the number of teeth of said front-end gearings differ from each other by at least one tooth. To reduce the overall dimensions of the device and avoid gearing lash, it is proposed, on the one hand, to connect the disk (10) rotationally fast to the camshaft (1) and on the other hand, to configure the disk (10) in axial direction of the camshaft (1) as a flexible element that can be deformed in axial direction by an adjusting device (thrust plate17).

REFERENCES:
patent: 3977275 (1976-08-01), Kieswetter et al.
patent: 4742729 (1988-05-01), Cordara
patent: 6848401 (2005-02-01), Takenaka et al.
patent: 2002/0017257 (2002-02-01), Axmacher et al.

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