Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-01-15
1998-11-17
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, 74568R, F01L 1344
Patent
active
058362789
ABSTRACT:
The invention relates in particular to a camshaft setting mechanism according to the vane cell principle, which has a drive gear (1) joined with the crankshaft through a toothed belt or a control chain. The drive gear includes a hollow space (8), and an impeller (11) is installed in the hollow space (8). The impeller is fixedly connected to and rotates with the camshaft (14). The drive gear (1) has at least one working chamber (4) on the interior of its circumferential wall (2), and each vane (12) of the impeller (11) subdivides the working chambers (4) into two pressure areas (9, 10) in each case. To avoid leakage through the slits (13) between impeller (11) and the drive gear (1) at high oil temperatures, the impeller (11) is made of a material which has a higher thermal expansion coefficient than the material of the drive gear (1), and that the pressure areas (9, 10) in the hollow space (7) of the drive gear (1) are sealed off by thermal expansion of the impeller (11) when the motor is in operation.
REFERENCES:
patent: 4857572 (1989-08-01), Shirai et al.
patent: 5450825 (1995-09-01), Geyer et al.
patent: 5666914 (1997-09-01), Ushida et al.
Ina Walzlager Schaeffler OHG
Lo Weilun
LandOfFree
Device for varying the valve control timing of an internal combu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for varying the valve control timing of an internal combu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for varying the valve control timing of an internal combu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-875141