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US 5,398,648 AGranted
Compact valve lifters
AssigneeGeneral Motors Corporation
InventorsMark J. Spath, Timothy J. Peterson, Ivan R. Samalot, Christopher M. Deminco, Timothy W. Kunz, Scott H. Nather
Life of this patent
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Abstract
Compact valve lifters are disclosed for overhead camshaft engines with direct acting valve gear and for engines with indirect acting valve actuation such as push rod actuated overhead valves. Two step variable lift and non-variable lift valve lifters are included as are roller and non-roller follower types with various features in common.
Claims11
Valve lift mechanism for an engine having a camshaft mounted at a level no higher than the actuating end of an associated valve, said mechanism comprising
- support means,
- a camshaft carried by the support means and having a pair of spaced cams,
- a valve lifter including a cam follower having a cylindrical body with first and second annular ends and an outer cylinder surface reciprocably carried in the support means, the first annular end including a pair of laterally spaced first cam engaging portions engaging the cams, and
- hydraulic lash adjusting means in the lifter and positioned laterally between the cam engaging portions and including a plunger reciprocable in the valve lifter and carrying check valve means, the plunger defining a high pressure chamber adjacent the first end and an inner reservoir in the lifter extending from the check valve means toward the follower second end, and
- means for delivering oil through the follower to the reservoir distal from the follower first end and the check valve means.
2 more elements
Dependencies are inferred from the claim text.