Internal-combustion engine with a device for hydraulically...

Details Internal-combustion engine with a device for hydraulically... Internal-combustion engine with a device for hydraulically...

2007-10-29

2011-10-11

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reissue Patent

active

RE042817

ABSTRACT:
An internal combustion engine having a device for hydraulically adjusting the angle of rotation of the camshaft thereof relative to the crankshaft thereof is provided, which also includes a vacuum pump for a servo load. The device includes a drive unit that is connected in a driving manner to the crankshaft and an output unit which is connected in a torsion-proof manner to the camshaft. The lubricating oil of the internal combustion engine, which is fed from a radial bearing of the camshaft in the cylinder head, is used as a hydraulic pressurizing medium for the device. Thee vacuum pump includes a housing that has a flanged connection to the cylinder head cover, and a rotor that is disposed therein and is provided with a drive shaft via which the vacuum pump is driven and lubricated. The vacuum pump is arranged in an axial direction relative to the device, while the device is provided with additional coupling elements via which the drive shaft od the vacuum pump is connected in a driving manner to the device. The vacuum pump is lubricated by lubricating oil from the internal combustion engine, which is delivered to the device as the pressurizing medium.

REFERENCES:
patent: 4662320 (1987-05-01), Moriya
patent: 5305718 (1994-04-01), Muller
patent: 5839401 (1998-11-01), Gruber et al.
patent: 8518157 (1986-10-01), None
patent: 4105144 (1992-08-01), None
patent: 687125 (1953-02-01), None

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