Lubrication mechanism for a cam drive

Details Lubrication mechanism for a cam drive Lubrication mechanism for a cam drive

2001-08-31

2003-04-01

Kwon, John (Department: 3747)

Internal-combustion engines

Lubricators

Crankcase, pressure control

Reexamination Certificate

active

06539911

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a cam drive for an internal combustion engine in a manually guided implement, especially for a valve-controlled, mixture-lubricated internal combustion engine.
DE 198 48 890 A1 discloses a mixture-lubricated, valve-controlled internal combustion engine according to which the mixture that is supplied to the combustion chamber is supplied via an intake channel and an intake valve. To ensure lubrication of the valve drive and the crank assembly, the valve housing is connected via a connection bore with the mixture-supplying channel, and the crankcase is connected to the valve housing via a channel. During the pulsation in the intake cycle there also results a mixture exchange, and hence a lubrication in the chambers that are connected only via a flow path.
Valve-controlled two-stroke or four-stroke engines run at high speeds, so that the surfaces of the control cams, as well as the cam drive itself, are subjected to high stresses. This can lead to premature wear, especially when there is a lack of lubricating oil.
It is therefore an object of the present invention to improve a cam drive of a valve-controlled internal combustion engine in such a way that in particular during a mixture lubrication an adequate supply of lubricating oil to the moving parts is ensured.


REFERENCES:
patent: 5975042 (1999-11-01), Aizawa et al.
patent: 6152098 (2000-11-01), Becker et al.
patent: 6199532 (2001-03-01), Häberlein et al.
patent: 19848890 (2000-04-01), None

Affiliated with

Also associated with

Rating

Lubrication mechanism for a cam drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lubrication mechanism for a cam drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lubrication mechanism for a cam drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3016320