Internal-combustion engines – Poppet valve operating mechanism – Lubrication
Patent
1997-02-26
1998-07-14
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Lubrication
123 906, 74567, 184 69, F01L 104, F01M 910
Patent
active
057788413
ABSTRACT:
A high strength, lightweight camshaft for an internal combustion engine, comprising a shaft body having an axially oriented hollow interior extending a predetermined length from between a pair of spaced points, respectively, adjacent the ends of the shaft body. Plural camshaft journal bearings are spaced apart on the shaft body and include a pair of end camshaft journal bearings positioned adjacent the ends of the shaft body, respectively, with at least one inner camshaft journal bearing positioned intermediate the pair of end camshaft journal bearings. Each end camshaft journal bearing has a lubricant transfer means formed therein for receiving lubricant from an external supply and for transferring lubricant into the hollow interior of the camshaft. At least one radial hole is formed in the shaft body for providing lubricant from the hollow interior to an inner camshaft journal bearing wherein the lubricant transfer means associated with the pair of end camshaft journals provides at least two paths for lubricant to flow into the hollow interior of the camshaft for providing an even distribution of lubrication to each inner camshaft journal bearing during operation of the internal combustion engine. A supply of lubricant always remains in the camshaft to assist in lubricating the camshaft journal bearings during engine start-up.
REFERENCES:
patent: 1469063 (1923-09-01), Wills
patent: 4072448 (1978-02-01), Loyd, Jr.
patent: 4430968 (1984-02-01), Futakuchi et al.
patent: 4441465 (1984-04-01), Nakamura
patent: 4565168 (1986-01-01), Rivere
patent: 4876916 (1989-10-01), Maier
patent: 4942855 (1990-07-01), Muto
patent: 4949683 (1990-08-01), Swars
patent: 4957079 (1990-09-01), Nakatani et al.
patent: 5143034 (1992-09-01), Hirose
patent: 5150675 (1992-09-01), Murata
patent: 5186129 (1993-02-01), Magnan et al.
patent: 5201247 (1993-04-01), Maus et al.
patent: 5273007 (1993-12-01), Ampferer
patent: 5404845 (1995-04-01), Hannibal et al.
Klopfer Rand D.
Myers Randal L.
Reedy Steven W.
Cummins Engine Company, Inc.
Leedom Jr. Charles M.
Lo Weilun
LandOfFree
Camshaft for internal combustion engines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Camshaft for internal combustion engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Camshaft for internal combustion engines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1872525