Internal-combustion engines – Poppet valve operating mechanism – Overhead camshaft
Patent
1994-08-29
1996-11-26
Moulis, Thomas N.
Internal-combustion engines
Poppet valve operating mechanism
Overhead camshaft
123 9033, 123 9034, F01M 106, F01M 910
Patent
active
RE0353825
ABSTRACT:
A lubrication arrangement for an engine and more particularly to an arrangement for lubricating the valve train of an engine. The valve train includes a cylinder head that journals an intake and an exhaust camshaft through bearings formed in the cylinder head and the cam cover. Hydraulic lash adjusters are associated with each of the camshafts and there are more intake adjusters than exhaust adjusters. An arrangement is provided for delivering lubricant to the lash adjusters and the camshaft journals which includes a passageway formed in the cam cover. Lubricant is delivered to the cylinder head in proximity to the intake adjusters so that the intake adjusters and the exhaust adjusters will receive lubricant at substantially the same pressure.
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Service Manual for Yamaha FZ750 (Mar. 1985).
Moulis Thomas N.
Yamaha Hatsudoki Kabushiki Kaisha
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