Al or Al alloy poppet valve and a method of manufacturing the sa

Details Al or Al alloy poppet valve and a method of manufacturing the sa Al or Al alloy poppet valve and a method of manufacturing the sa

1998-08-07

2000-06-13

Douglas, Steven O.

Valves and valve actuation

Valve

Materials

1231883, 2989012, F01L 300

Patent

active

060739126

ABSTRACT:
An Al alloy poppet valve is used in an internal combustion engine. The poppet valve comprises a valve stem and a valve head at the end of the valve stem. The valve head has a tapered valve face, which is engaged on a valve seat when an inlet port is closed by the poppet valve. The valve face has a thermal hardened layer on the surface and an inner alloy layer, thereby increasing mechanical strength to provide high durability and reliability.

REFERENCES:
patent: 4073474 (1978-02-01), Hashimoto et al.
patent: 4852531 (1989-08-01), Abkowitz et al.

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